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Author SHA1 Message Date
Mikko Perttunen bac5c3b829 gpio: tegra186: Add support for Tegra194 
Add support for the Tegra194 GPIO bank configuration.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-07-02 16:01:02 +02:00
Linus Walleij 90b39402e9 gpio: Add API to explicitly name a consumer 
The GPIO (descriptor) API registers a "label" naming what is
currently using the GPIO line. Typically this is taken from
things like the device tree node, so "reset-gpios" will result
in he line being labeled "reset".

The technical effect is pretty much zero: the use is for
debug and introspection, such as "lsgpio" and debugfs files.

However sometimes the user want this cuddly feeling of
listing all GPIO lines and seeing exactly what they are for
and it gives a very fulfilling sense of control. Especially
in the cases when the device tree node doesn't provide a
good name, or anonymous GPIO lines assigned just to
"gpios" in the device tree because the usage is implicit.

For these cases it may be nice to be able to label the
line directly and explicitly.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-06-18 07:55:30 +02:00
Zhouyang Jia f3a049e784 gpio: max732x: add error handling for i2c_new_dummy 
When i2c_new_dummy fails, the lack of error-handling code may
cause unexpected results.

This patch adds error-handling code after calling i2c_new_dummy.

Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-06-18 07:55:30 +02:00
Keerthy eb3744a2dd gpio: davinci: Do not assume continuous IRQ numbering 
Currently the driver assumes that the interrupts are continuous
and does platform_get_irq only once and assumes the rest are continuous,
instead call platform_get_irq for all the interrupts and store them
in an array for later use.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-06-18 07:55:30 +02:00
Keerthy c1d013a70f gpio: davinci: Shuffle IRQ resource fetching from DT to beginning of probe 
This is needed in case of PROBE_DEFER if IRQ resource is not yet ready.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-06-18 07:55:30 +02:00
Nadav Amit 7279d99175 gpio: Fix wrong rounding in gpio-menz127 
men_z127_debounce() tries to round up and down, but uses functions which
are only suitable when the divider is a power of two, which is not the
case. Use the appropriate ones.

Found by static check. Compile tested.

Fixes: f436bc2726 ("gpio: add driver for MEN 16Z127 GPIO controller")
Signed-off-by: Nadav Amit <namit@vmware.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-06-18 07:55:30 +02:00
Kees Cook a86854d0c5 treewide: devm_kzalloc() -> devm_kcalloc() 
The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc().
This patch replaces cases of:

        devm_kzalloc(handle, a * b, gfp)

with:
        devm_kcalloc(handle, a * b, gfp)

as well as handling cases of:

        devm_kzalloc(handle, a * b * c, gfp)

with:

        devm_kzalloc(handle, array3_size(a, b, c), gfp)

as it's slightly less ugly than:

        devm_kcalloc(handle, array_size(a, b), c, gfp)

This does, however, attempt to ignore constant size factors like:

        devm_kzalloc(handle, 4 * 1024, gfp)

though any constants defined via macros get caught up in the conversion.

Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.

Some manual whitespace fixes were needed in this patch, as Coccinelle
really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...".

The Coccinelle script used for this was:

// Fix redundant parens around sizeof().
@@
expression HANDLE;
type TYPE;
expression THING, E;
@@

(
  devm_kzalloc(HANDLE,
-	(sizeof(TYPE)) * E
+	sizeof(TYPE) * E
  , ...)
|
  devm_kzalloc(HANDLE,
-	(sizeof(THING)) * E
+	sizeof(THING) * E
  , ...)
)

// Drop single-byte sizes and redundant parens.
@@
expression HANDLE;
expression COUNT;
typedef u8;
typedef __u8;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(u8) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(__u8) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(char) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(unsigned char) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(u8) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(__u8) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(char) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(unsigned char) * COUNT
+	COUNT
  , ...)
)

// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
expression HANDLE;
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@

(
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (COUNT_ID)
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * COUNT_ID
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (COUNT_CONST)
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * COUNT_CONST
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (COUNT_ID)
+	COUNT_ID, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * COUNT_ID
+	COUNT_ID, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (COUNT_CONST)
+	COUNT_CONST, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * COUNT_CONST
+	COUNT_CONST, sizeof(THING)
  , ...)
)

// 2-factor product, only identifiers.
@@
expression HANDLE;
identifier SIZE, COUNT;
@@

- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	SIZE * COUNT
+	COUNT, SIZE
  , ...)

// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression HANDLE;
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
)

// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression HANDLE;
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
)

// 3-factor product, only identifiers, with redundant parens removed.
@@
expression HANDLE;
identifier STRIDE, SIZE, COUNT;
@@

(
  devm_kzalloc(HANDLE,
-	(COUNT) * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
)

// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression HANDLE;
expression E1, E2, E3;
constant C1, C2, C3;
@@

(
  devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * (E2) * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * (E2) * (E3)
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	E1 * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
)

// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression HANDLE;
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@

(
  devm_kzalloc(HANDLE, sizeof(THING) * C2, ...)
|
  devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...)
|
  devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
  devm_kzalloc(HANDLE, C1 * C2, ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (E2)
+	E2, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * E2
+	E2, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (E2)
+	E2, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * E2
+	E2, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	(E1) * E2
+	E1, E2
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	(E1) * (E2)
+	E1, E2
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	E1 * E2
+	E1, E2
  , ...)
)

Signed-off-by: Kees Cook <keescook@chromium.org>
 2018-06-12 16:19:22 -07:00
Kees Cook 6396bb2215 treewide: kzalloc() -> kcalloc() 
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:

        kzalloc(a * b, gfp)

with:
        kcalloc(a * b, gfp)

as well as handling cases of:

        kzalloc(a * b * c, gfp)

with:

        kzalloc(array3_size(a, b, c), gfp)

as it's slightly less ugly than:

        kzalloc_array(array_size(a, b), c, gfp)

This does, however, attempt to ignore constant size factors like:

        kzalloc(4 * 1024, gfp)

though any constants defined via macros get caught up in the conversion.

Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.

The Coccinelle script used for this was:

// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@

(
  kzalloc(
-	(sizeof(TYPE)) * E
+	sizeof(TYPE) * E
  , ...)
|
  kzalloc(
-	(sizeof(THING)) * E
+	sizeof(THING) * E
  , ...)
)

// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@

(
  kzalloc(
-	sizeof(u8) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(__u8) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(char) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(unsigned char) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(u8) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(__u8) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(char) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(unsigned char) * COUNT
+	COUNT
  , ...)
)

// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@

(
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (COUNT_ID)
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * COUNT_ID
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (COUNT_CONST)
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * COUNT_CONST
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (COUNT_ID)
+	COUNT_ID, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * COUNT_ID
+	COUNT_ID, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (COUNT_CONST)
+	COUNT_CONST, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * COUNT_CONST
+	COUNT_CONST, sizeof(THING)
  , ...)
)

// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@

- kzalloc
+ kcalloc
  (
-	SIZE * COUNT
+	COUNT, SIZE
  , ...)

// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@

(
  kzalloc(
-	sizeof(TYPE) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(THING) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
)

// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@

(
  kzalloc(
-	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  kzalloc(
-	sizeof(THING1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(THING1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
)

// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@

(
  kzalloc(
-	(COUNT) * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
)

// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@

(
  kzalloc(C1 * C2 * C3, ...)
|
  kzalloc(
-	(E1) * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	(E1) * (E2) * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	(E1) * (E2) * (E3)
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	E1 * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
)

// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@

(
  kzalloc(sizeof(THING) * C2, ...)
|
  kzalloc(sizeof(TYPE) * C2, ...)
|
  kzalloc(C1 * C2 * C3, ...)
|
  kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (E2)
+	E2, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * E2
+	E2, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (E2)
+	E2, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * E2
+	E2, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	(E1) * E2
+	E1, E2
  , ...)
|
- kzalloc
+ kcalloc
  (
-	(E1) * (E2)
+	E1, E2
  , ...)
|
- kzalloc
+ kcalloc
  (
-	E1 * E2
+	E1, E2
  , ...)
)

Signed-off-by: Kees Cook <keescook@chromium.org>
 2018-06-12 16:19:22 -07:00
Linus Torvalds ea125dedbc This is the bulk of GPIO changes for the v4.18 development 
cycle.
 
 Core changes:
 
 - We have killed off VLA from the core library and all drivers.
   The background should be clear for everyone at this point:
   https://lwn.net/Articles/749064/
   Also I just don't like VLA's, kernel developers hate it when
   compilers do things behind their back. It's as simple as that.
   I'm sorry that they even slipped in to begin with.
   Kudos to Laura Abbott for exorcising them.
 
 - Support GPIO hogs in machines/board files.
 
 New drivers and chip support:
 
 - R-Car r8a77470 (RZ/G1C)
 - R-Car r8a77965 (M3-N)
 - R-Car r8a77990 (E3)
 - PCA953x driver improvements to accomodate more variants.
 
 Improvements and new features:
 
 - Support one interrupt per line on port A in the DesignWare
   dwapb driver.
 
 Misc:
 
 - Random cleanups, right header files in the drivers, some
   size optimizations etc.
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Merge tag 'gpio-v4.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO changes for the v4.18 development cycle.

  Core changes:

   - We have killed off VLA from the core library and all drivers.

     The background should be clear for everyone at this point:

        https://lwn.net/Articles/749064/

     Also I just don't like VLA's, kernel developers hate it when
     compilers do things behind their back. It's as simple as that.

     I'm sorry that they even slipped in to begin with. Kudos to Laura
     Abbott for exorcising them.

   - Support GPIO hogs in machines/board files.

  New drivers and chip support:

   - R-Car r8a77470 (RZ/G1C)

   - R-Car r8a77965 (M3-N)

   - R-Car r8a77990 (E3)

   - PCA953x driver improvements to accomodate more variants.

  Improvements and new features:

   - Support one interrupt per line on port A in the DesignWare dwapb
     driver.

  Misc:

   - Random cleanups, right header files in the drivers, some size
     optimizations etc"

* tag 'gpio-v4.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (73 commits)
  gpio: davinci: fix build warning when !CONFIG_OF
  gpio: dwapb: Fix rework support for 1 interrupt per port A GPIO
  gpio: pxa: Include the right header
  gpio: pl061: Include the right header
  gpio: pch: Include the right header
  gpio: pcf857x: Include the right header
  gpio: pca953x: Include the right header
  gpio: palmas: Include the right header
  gpio: omap: Include the right header
  gpio: octeon: Include the right header
  gpio: mxs: Switch to SPDX identifier
  gpio: Remove VLA from stmpe driver
  gpio: mxc: Switch to SPDX identifier
  gpio: mxc: add clock operation
  gpio: Remove VLA from gpiolib
  gpio: aspeed: Use a cache of output data registers
  gpio: aspeed: Set output latch before changing direction
  gpio: pca953x: fix address calculation for pcal6524
  gpio: pca953x: define masks for addressing common and extended registers
  gpio: pca953x: set the PCA_PCAL flag also when matching by DT
  ...
 2018-06-08 10:31:52 -07:00
Linus Torvalds edb2a385ec This is the bulk of pin control changes for v4.18. 
No core changes this time! Just a calm all-over-the-place
 drivers, updates and fixes cycle as it seems.
 
 New drivers/subdrivers:
 
 - Actions Semiconductor S900 driver with more Actions
   variants for S700, S500 in the pipe. Also generic GPIO
   support on top of the same driver and IRQ support is in
   the pipe.
 
 - Renesas r8a77470 PFC support.
 
 - Renesas r8a77990 PFC support.
 
 - Allwinner Sunxi H6 R_PIO support.
 
 - Rockchip PX30 support.
 
 - Meson Meson8m2 support.
 
 - Remove support for the ill-fated Samsung Exynos 5440 SoC.
 
 Improvements:
 
 - Context save/restore support in pinctrl-single.
 
 - External interrupt support for the Mediatek MT7622.
 
 - Qualcomm ACPI HID QCOM8002 supported.
 
 Fixes:
 
 - Fix up suspend/resume support for Exynos 5433.
 
 - Fix Strago DMI fixes on the Intel Cherryview.
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Merge tag 'pinctrl-v4.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull pin control updates from Linus Walleij:
 "This is the bulk of pin control changes for v4.18.

  No core changes this time! Just a calm all-over-the-place drivers,
  updates and fixes cycle as it seems.

  New drivers/subdrivers:

   - Actions Semiconductor S900 driver with more Actions variants for
     S700, S500 in the pipe. Also generic GPIO support on top of the
     same driver and IRQ support is in the pipe.

   - Renesas r8a77470 PFC support.

   - Renesas r8a77990 PFC support.

   - Allwinner Sunxi H6 R_PIO support.

   - Rockchip PX30 support.

   - Meson Meson8m2 support.

   - Remove support for the ill-fated Samsung Exynos 5440 SoC.

  Improvements:

   - Context save/restore support in pinctrl-single.

   - External interrupt support for the Mediatek MT7622.

   - Qualcomm ACPI HID QCOM8002 supported.

  Fixes:

   - Fix up suspend/resume support for Exynos 5433.

   - Fix Strago DMI fixes on the Intel Cherryview"

* tag 'pinctrl-v4.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (72 commits)
  pinctrl: cherryview: limit Strago DMI workarounds to version 1.0
  pinctrl: at91-pio4: add missing of_node_put
  pinctrl: armada-37xx: Fix spurious irq management
  gpiolib: discourage gpiochip_add_pin[group]_range for DT pinctrls
  pinctrl: msm: fix gpio-hog related boot issues
  MAINTAINERS: update entry for Mediatek pin controller
  pinctrl: mediatek: remove unused fields in struct mtk_eint_hw
  pinctrl: mediatek: use generic EINT register maps for each SoC
  pinctrl: mediatek: add EINT support to MT7622 SoC
  pinctrl: mediatek: refactor EINT related code for all MediaTek pinctrl can fit
  dt-bindings: pinctrl: add external interrupt support to MT7622 pinctrl
  pinctrl: freescale: Switch to SPDX identifier
  pinctrl: samsung: Fix suspend/resume for Exynos5433 GPF1..5 banks
  pinctrl: sh-pfc: rcar-gen3: Fix grammar in static pin comments
  pinctrl: sh-pfc: r8a77965: Add I2C pin support
  pinctrl: sh-pfc: r8a77990: Add EthernetAVB pins, groups and functions
  pinctrl: sh-pfc: r8a77990: Add I2C{1,2,4,5,6,7} pins, groups and functions
  pinctrl: sh-pfc: r8a77990: Add SCIF pins, groups and functions
  pinctrl: sh-pfc: r8a77990: Add bias pinconf support
  pinctrl: sh-pfc: Initial R8A77990 PFC support
  ...
 2018-06-07 13:56:45 -07:00
Linus Torvalds 2857676045 - Introduce arithmetic overflow test helper functions (Rasmus) 
- Use overflow helpers in 2-factor allocators (Kees, Rasmus)
 - Introduce overflow test module (Rasmus, Kees)
 - Introduce saturating size helper functions (Matthew, Kees)
 - Treewide use of struct_size() for allocators (Kees)
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Merge tag 'overflow-v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull overflow updates from Kees Cook:
 "This adds the new overflow checking helpers and adds them to the
  2-factor argument allocators. And this adds the saturating size
  helpers and does a treewide replacement for the struct_size() usage.
  Additionally this adds the overflow testing modules to make sure
  everything works.

  I'm still working on the treewide replacements for allocators with
  "simple" multiplied arguments:

     *alloc(a * b, ...) -> *alloc_array(a, b, ...)

  and

     *zalloc(a * b, ...) -> *calloc(a, b, ...)

  as well as the more complex cases, but that's separable from this
  portion of the series. I expect to have the rest sent before -rc1
  closes; there are a lot of messy cases to clean up.

  Summary:

   - Introduce arithmetic overflow test helper functions (Rasmus)

   - Use overflow helpers in 2-factor allocators (Kees, Rasmus)

   - Introduce overflow test module (Rasmus, Kees)

   - Introduce saturating size helper functions (Matthew, Kees)

   - Treewide use of struct_size() for allocators (Kees)"

* tag 'overflow-v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  treewide: Use struct_size() for devm_kmalloc() and friends
  treewide: Use struct_size() for vmalloc()-family
  treewide: Use struct_size() for kmalloc()-family
  device: Use overflow helpers for devm_kmalloc()
  mm: Use overflow helpers in kvmalloc()
  mm: Use overflow helpers in kmalloc_array*()
  test_overflow: Add memory allocation overflow tests
  overflow.h: Add allocation size calculation helpers
  test_overflow: Report test failures
  test_overflow: macrofy some more, do more tests for free
  lib: add runtime test of check_*_overflow functions
  compiler.h: enable builtin overflow checkers and add fallback code
 2018-06-06 17:27:14 -07:00
Kees Cook 0ed2dd03b9 treewide: Use struct_size() for devm_kmalloc() and friends 
Replaces open-coded struct size calculations with struct_size() for
devm_*, f2fs_*, and sock_* allocations. Automatically generated (and
manually adjusted) from the following Coccinelle script:

// Direct reference to struct field.
@@
identifier alloc =~ "devm_kmalloc|devm_kzalloc|sock_kmalloc|f2fs_kmalloc|f2fs_kzalloc";
expression HANDLE;
expression GFP;
identifier VAR, ELEMENT;
expression COUNT;
@@

- alloc(HANDLE, sizeof(*VAR) + COUNT * sizeof(*VAR->ELEMENT), GFP)
+ alloc(HANDLE, struct_size(VAR, ELEMENT, COUNT), GFP)

// mr = kzalloc(sizeof(*mr) + m * sizeof(mr->map[0]), GFP_KERNEL);
@@
identifier alloc =~ "devm_kmalloc|devm_kzalloc|sock_kmalloc|f2fs_kmalloc|f2fs_kzalloc";
expression HANDLE;
expression GFP;
identifier VAR, ELEMENT;
expression COUNT;
@@

- alloc(HANDLE, sizeof(*VAR) + COUNT * sizeof(VAR->ELEMENT[0]), GFP)
+ alloc(HANDLE, struct_size(VAR, ELEMENT, COUNT), GFP)

// Same pattern, but can't trivially locate the trailing element name,
// or variable name.
@@
identifier alloc =~ "devm_kmalloc|devm_kzalloc|sock_kmalloc|f2fs_kmalloc|f2fs_kzalloc";
expression HANDLE;
expression GFP;
expression SOMETHING, COUNT, ELEMENT;
@@

- alloc(HANDLE, sizeof(SOMETHING) + COUNT * sizeof(ELEMENT), GFP)
+ alloc(HANDLE, CHECKME_struct_size(&SOMETHING, ELEMENT, COUNT), GFP)

Signed-off-by: Kees Cook <keescook@chromium.org>
 2018-06-06 11:15:43 -07:00
Kees Cook acafe7e302 treewide: Use struct_size() for kmalloc()-family 
One of the more common cases of allocation size calculations is finding
the size of a structure that has a zero-sized array at the end, along
with memory for some number of elements for that array. For example:

struct foo {
    int stuff;
    void *entry[];
};

instance = kmalloc(sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL);

Instead of leaving these open-coded and prone to type mistakes, we can
now use the new struct_size() helper:

instance = kmalloc(struct_size(instance, entry, count), GFP_KERNEL);

This patch makes the changes for kmalloc()-family (and kvmalloc()-family)
uses. It was done via automatic conversion with manual review for the
"CHECKME" non-standard cases noted below, using the following Coccinelle
script:

// pkey_cache = kmalloc(sizeof *pkey_cache + tprops->pkey_tbl_len *
//                      sizeof *pkey_cache->table, GFP_KERNEL);
@@
identifier alloc =~ "kmalloc|kzalloc|kvmalloc|kvzalloc";
expression GFP;
identifier VAR, ELEMENT;
expression COUNT;
@@

- alloc(sizeof(*VAR) + COUNT * sizeof(*VAR->ELEMENT), GFP)
+ alloc(struct_size(VAR, ELEMENT, COUNT), GFP)

// mr = kzalloc(sizeof(*mr) + m * sizeof(mr->map[0]), GFP_KERNEL);
@@
identifier alloc =~ "kmalloc|kzalloc|kvmalloc|kvzalloc";
expression GFP;
identifier VAR, ELEMENT;
expression COUNT;
@@

- alloc(sizeof(*VAR) + COUNT * sizeof(VAR->ELEMENT[0]), GFP)
+ alloc(struct_size(VAR, ELEMENT, COUNT), GFP)

// Same pattern, but can't trivially locate the trailing element name,
// or variable name.
@@
identifier alloc =~ "kmalloc|kzalloc|kvmalloc|kvzalloc";
expression GFP;
expression SOMETHING, COUNT, ELEMENT;
@@

- alloc(sizeof(SOMETHING) + COUNT * sizeof(ELEMENT), GFP)
+ alloc(CHECKME_struct_size(&SOMETHING, ELEMENT, COUNT), GFP)

Signed-off-by: Kees Cook <keescook@chromium.org>
 2018-06-06 11:15:43 -07:00
Richard Fitzgerald aca429ff9d gpio: madera: Support Cirrus Logic Madera class codecs 
This adds support for the GPIOs on Cirrus Logic Madera class codecs.
Any pins not used for special functions (see the pinctrl driver) can be
used as general single-bit input or output lines. The number of available
GPIOs varies between codecs.

Note that this is part of a composite MFD for these codecs and can only
be used with the corresponding MFD and other child drivers on those
silicon. The GPIO block on these codecs does not exist indepedently of
the rest of the MFD.

Signed-off-by: Nariman Poushin <nariman@opensource.cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
 2018-06-05 11:15:30 +01:00
Sekhar Nori 6310b930cc gpio: davinci: fix build warning when !CONFIG_OF 
This nukes the following warning that is seen when building without
OF support:

drivers/gpio/gpio-davinci.c:437:25: warning: ‘keystone_gpio_get_irq_chip’ defined but not used [-Wunused-function]
 static struct irq_chip *keystone_gpio_get_irq_chip(unsigned int irq)
                         ^~~~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-30 09:11:11 +02:00
Linus Walleij 84bf021ece gpio: pxa: Include the right header 
This is a GPIO driver, include only <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-24 17:09:41 +02:00
Linus Walleij dcc6ceef74 gpio: pl061: Include the right header 
This is a GPIO driver, include only <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-24 17:09:41 +02:00
Linus Walleij 5db1f87317 gpio: pch: Include the right header 
This is a GPIO driver, include only <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-24 17:09:41 +02:00
Linus Walleij 12087fab91 gpio: pcf857x: Include the right header 
This is a GPIO driver, include only <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-24 17:09:41 +02:00
Linus Walleij 644f3da0b4 gpio: pca953x: Include the right header 
This is a GPIO driver, include only <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-24 17:09:41 +02:00
Linus Walleij b11a0b3e72 gpio: palmas: Include the right header 
This is a GPIO driver, include only <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-24 14:25:13 +02:00
Linus Walleij b7351b077e gpio: omap: Include the right header 
This is a GPIO driver, include only <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-24 14:24:00 +02:00
Linus Walleij be1f20a41f gpio: octeon: Include the right header 
This is a GPIO driver, include only <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-24 14:22:04 +02:00
Fabio Estevam 339e7730cb gpio: mxs: Switch to SPDX identifier 
Adopt the SPDX license identifier headers to ease license compliance
management.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-24 13:43:56 +02:00
Laura Abbott 97fe7bef56 gpio: Remove VLA from stmpe driver 
The new challenge is to remove VLAs from the kernel
(see https://lkml.org/lkml/2018/3/7/621)

The number of GPIOs on the supported chips is fairly small
so stack allocate to a known upper bound and spit out a warning
if any new chips have more gpios.

Signed-off-by: Laura Abbott <labbott@redhat.com>
Reviewed-by: Phil Reid <preid@electromag.com.au>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-24 10:22:21 +02:00
Fabio Estevam 014e420d8a gpio: mxc: Switch to SPDX identifier 
Adopt the SPDX license identifier headers to ease license compliance
management.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-24 10:14:30 +02:00
Anson Huang 2808801aab gpio: mxc: add clock operation 
Some i.MX SoCs have GPIO clock gates in CCM CCGR, such as
i.MX6SLL, need to enable clocks before accessing GPIO
registers, add optional clock operation for GPIO driver.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-24 10:09:46 +02:00
Christian Lamparter 973c1714de gpiolib: discourage gpiochip_add_pin[group]_range for DT pinctrls 
This patch adds the stern warning to the kerneldoc text of both
gpiochip_add_pin[group]_range() functions in hope of detering
developers from ever using them in their DeviceTree-supported
pinctrl drivers in the future.

For anyone affected: Please refer to Section 2.1 of
Documentation/devicetree/bindings/gpio/gpio.txt on how to
bind pinctrl and gpio drivers via the "gpio-ranges" property.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-24 10:05:51 +02:00
Laura Abbott 3027743f83 gpio: Remove VLA from gpiolib 
The new challenge is to remove VLAs from the kernel
(see https://lkml.org/lkml/2018/3/7/621) to eventually
turn on -Wvla.

Using a kmalloc array is the easy way to fix this but kmalloc is still
more expensive than stack allocation. Introduce a fast path with a
fixed size stack array to cover most chip with gpios below some fixed
amount. The slow path dynamically allocates an array to cover those
chips with a large number of gpios.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Phil Reid <preid@electromag.com.au>
Reviewed-and-tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Laura Abbott <labbott@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-23 14:01:03 +02:00
Benjamin Herrenschmidt ed5cab43f9 gpio: aspeed: Use a cache of output data registers 
The current driver does a read/modify/write of the output
registers when changing a bit in __aspeed_gpio_set().

This is sub-optimal for a couple of reasons:

  - If any of the neighbouring GPIOs (sharing the shared
register) isn't (yet) configured as an output, it will
read the current input value, and then apply it to the
output latch, which may not be what the user expects. There
should be no bug in practice as aspeed_gpio_dir_out() will
establish a new value but it's not great either.

  - The GPIO block in the aspeed chip is clocked rather
slowly (typically 25Mhz). That extra MMIO read halves the maximum
speed at which we can toggle the GPIO.

This provides a significant performance improvement to the GPIO
based FSI master.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Christopher Bostic <cbostic@linux.vnet.ibm.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Tested-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-23 13:59:06 +02:00
Benjamin Herrenschmidt af79492849 gpio: aspeed: Set output latch before changing direction 
In aspeed_gpio_dir_out(), we need to establish the new output
value in the output latch *before* we change the direction
to output in order to avoid a glitch on the output line if
the previous value of the latch was different.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Christopher Bostic <cbostic@linux.vnet.ibm.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Tested-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-23 13:57:44 +02:00
H. Nikolaus Schaller d5dbf9c266 gpio: pca953x: fix address calculation for pcal6524 
The register constants are so far defined in a way that they fit
for the pcal9555a when shifted by the number of banks, i.e. are
multiplied by 2 in the accessor function.

Now, the pcal6524 has 3 banks which means the relative offset
is multiplied by 4 for the standard registers.

Simply applying the bit shift to the extended registers gives
a wrong result, since the base offset is already included in
the offset.

Therefore, we have to add code to the 24 bit accessor functions
that adjusts the register number for these exended registers.

The formula finally used was developed and proposed by
Andy Shevchenko <andy.shevchenko@gmail.com>.

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-23 13:49:40 +02:00
H. Nikolaus Schaller 394aeef83c gpio: pca953x: define masks for addressing common and extended registers 
These mask bits are to be used to map the extended register
addresses (which are defined for an unsupported 8-bit pcal chip)
to 16 and 24 bit chips (pcal6524).

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-23 13:49:40 +02:00
H. Nikolaus Schaller 0cdf21b34e gpio: pca953x: set the PCA_PCAL flag also when matching by DT 
The of_device_table is missing the PCA_PCAL flag so the
pcal6524 would be operated in tca6424 compatibility mode which
does not handle the new interrupt mask registers.

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-23 13:49:09 +02:00
Grigoryev Denis 0a70fe00ef gpio: pca953x: Clear irq trigger type on irq shutdown 
The driver stores the result of irq_set_type() in the internal variables
irq_trig_raise and irq_trig_fall, which later are used to determine
the GPIOs that must be re-configured as input. These variables retain their
value between gpiolib's  export / unexport, resulting in an incorrect
state in some cases. The corresponding bits in the variables
irq_trig_raise and irq_trig_fall should be cleared in irq_shutdown().

Signed-off-by: Denis Grigoryev <grigoryev@fastwel.ru>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-23 11:47:26 +02:00
Michal Simek 060f3ebf6a gpio: zynq: Setup chip->base based on alias ID 
In past Xilinx gpio-zynq driver was setting up gpio chip->base as 0
which was chagned to autodetection when driver was upstreamed. Older
systems, which were using this old version, setup SW stack which expects
zynq gpio base as 0 and right now there is no way how to set this up.

The patch is adding an option to setup chip->base based on aliases which
is something what some other drivers are doing too.
It means when gpio0 alias is setup then chip->base is 0. When gpio alias
is not setup gpiochip_find_base() set it up properly which is current
behavior.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-23 11:43:03 +02:00
Phil Edworthy da069d5d2b gpio: dwapb: Rework support for 1 interrupt per port A GPIO 
Treat DT and ACPI the same as much as possible. Note that we can't use
platform_get_irq() to get the DT interrupts as they are in the port
sub-node and hence do not have an associated platform device.

This also fixes a problem introduced with error checking when calling
platform_get_irq().

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-23 11:30:13 +02:00
Heiko Stuebner aa1fdda8f7 gpio: syscon: allow fetching syscon from parent node 
Syscon nodes can be a simple-mfd and the syscon-users then be declared
as children of this node. That way the parent-child structure can be
better represented for devices that are fully embedded in the syscon.

Therefore allow getting the syscon from the parent if neither
a special compatible nor a gpio,syscon-dev property is defined.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Levin Du <djw@t-chip.com.cn>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-23 10:07:26 +02:00
Shubhrajyoti Datta a76e865eea gpio: zynq: simplifly getting drvdata 
Get the driver data directly by dev_get_drvdata.

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Reviewed-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-23 09:57:08 +02:00
Shubhrajyoti Datta 5e3a8ecd76 gpio: zynq: Remove call to platform_get_irq 
Remove the call to  platform_get_irq use the cached
one instead.

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Reviewed-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-23 09:55:53 +02:00
Andy Shevchenko 4b21f94a30 gpio: Convert to use match_string() helper 
The new helper returns index of the matching string in an array.
We are going to use it here.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
H. Nikolaus Schaller a0ecbcccb5 gpio: pca953x: add more register definitions for pcal6524 
The pcal6524 has another set of registers to fine control
the interrupt handling.

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
H. Nikolaus Schaller 6315d231ef gpio: pca953x: add more register definitions for pcal953x 
PCAL chips ("L" seems to stand for "latched") have additional
registers starting at address 0x40 to control the latches,
interrupt mask, pull-up and pull down etc.

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
H. Nikolaus Schaller 0950c19aca gpio: pca953x: convert register constants to hex 
which makes it easier to match them with the data sheets.

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Thierry Reding 668f06579e gpio: ge: Fix build warning 
Casting a pointer to u16 can produce a compiler warning such as this:

    drivers/gpio/gpio-ge.c: In function 'gef_gpio_probe':
    drivers/gpio/gpio-ge.c:83:14: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
        gc->ngpio = (u16)of_device_get_match_data(&pdev->dev);
                    ^

Cast the pointer through a uintptr_t to avoid the warning.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Dan Carpenter ba3efdff2c gpiolib: fix gpiochip_machine_hog() 
There is a shifter vs vanilla mask bug here.  We want to test if 1 << 11
is set but we're testing if 0xb is set.

Fixes: 9a6c505f7df1 ("gpiolib: add hogs support for machine code")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Thierry Reding 0c695e38d9 gpio: xlp: Use of_device_get_match_data() 
Use of_device_get_match_data() instead of open-coding it.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Thierry Reding 23e577ebee gpio: vf610: Use of_device_get_match_data() 
Use of_device_get_match_data() instead of open-coding it.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Thierry Reding 81317c5a08 gpio: ts4900: Use of_device_get_match_data() 
Use of_device_get_match_data() instead of open-coding it.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Thierry Reding edf874ef2d gpio: syscon: Use of_device_get_match_data() 
Use of_device_get_match_data() instead of open-coding it.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Thierry Reding 8357759a42 gpio: pxa: Use of_device_get_match_data() 
Use of_device_get_match_data() instead of open-coding it.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Thierry Reding 67bab93533 gpio: pca953x: Use of_device_get_match_data() 
Use of_device_get_match_data() instead of open-coding it.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Thierry Reding fd46d5c350 gpio: palmas: Use of_device_get_match_data() 
Use of_device_get_match_data() instead of open-coding it.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Thierry Reding 1f2d357b9e gpio: mxs: Use of_device_get_match_data() 
Use of_device_get_match_data() instead of open-coding it.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Thierry Reding d897738381 gpio: ingenic: Use of_device_get_match_data() 
Use of_device_get_match_data() instead of open-coding it.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Thierry Reding 490a887829 gpio: ge: Use of_device_get_match_data() 
Use of_device_get_match_data() instead of open-coding it.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Thierry Reding 7114b7bacb gpio: dwapb: Use of_device_get_match_data() 
Use of_device_get_match_data() instead of open-coding it.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Thierry Reding a23ffcf253 gpio: 74xx-mmio: Use of_device_get_match_data() 
Use of_device_get_match_data() instead of open-coding it.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Bartosz Golaszewski 058de3486b gpio: mockup: use the SPDX identifier and remove license boilerplate 
Use the SPDX license identifier for GPLv2.0 or later and remove the
license boilerplate.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Phil Edworthy e6ca26abd3 gpio: dwapb: Add support for 1 interrupt per port A GPIO 
The DesignWare GPIO IP can be configured for either 1 interrupt or 1
per GPIO in port A, but the driver currently only supports 1 interrupt.
See the DesignWare DW_apb_gpio Databook description of the
'GPIO_INTR_IO' parameter.

This change allows the driver to work with up to 32 interrupts, it will
get as many interrupts as specified in the DT 'interrupts' property.
It doesn't do anything clever with the different interrupts, it just calls
the same handler used for single interrupt hardware.

ACPI companion code provided by Hoan Tran <hotran@apm.com>. This was tested
on X-Gene by Hoan.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Hoan Tran <hotran@apm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Colin Ian King 413f9e9918 gpio: make several const arrays static, shrinks object size 
Don't populate the const read-only arrays 'port' on the stack but
instead make them static. Makes the object code smaller:

Before:
  text    data     bss     dec    hex filename
  8542    4088     672   13302   33f6 drivers/gpio/gpio-gpio-mm.o
 10959    4952     832   16743   4167 drivers/gpio/gpio-104-dio-48e.o
  9022    5064    1408   15494   3c86 drivers/gpio/gpio-104-idi-48.o

After:
  text    data     bss     dec    hex filename
  8372    4144     672   13188   3384 drivers/gpio/gpio-gpio-mm.o
 10790    5008     832   16630   40f6 drivers/gpio/gpio-104-dio-48e.o
  8853    5152    1408   15413   3c35 linux/drivers/gpio/gpio-104-idi-48.o

(gcc version 7.2.0 x86_64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Linus Walleij 8d0bd9a5c2 gpio: mxc: Remove reliance on <linux/gpio.h> 
This is a driver so we should only include <linux/gpio/driver.h>.
However this driver was using gpio_get_value() to fetch the
current value of a GPIO used as IRQ line to determine trigger
direction, so we need a better way than looping over the
global GPIO numberspace.

Fix this by just calling the .get() function in the GPIO chip,
as we don't want to end up creating a consumer dependency
on ourselves.

Cc: Vladimir Zapolskiy <vz@mleia.com>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Linus Walleij ba78d83be7 gpio: mvebu: Use the proper APIs 
The MVEBU driver is requesting GPIO descriptors from itself, which
is fine, but we have proper APIs to do this in a controlled way, so
stop calling into the private functions of the GPIO library and use
the gpiochip_* functions instead. Only include <linux/gpio/driver.h>
and <linux/gpio/consumer.h> since we are both producers and consumers
in this case.

Cc: Gregory CLEMENT <gregory.clement@free-electrons.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Linus Walleij 99ef32adc5 gpio: msic: Include the right header 
This is a driver so only include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Linus Walleij 0cbbdcf903 gpio: mm-lantiq: Include the right header 
This is a driver so include only <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Linus Walleij 85320ab6f9 gpio: ml_ioh: Include the right header 
This is a driver so include only <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Linus Walleij 3dc1c92fb2 gpio: mc9s08dz60: Include the right header 
This is a driver so only include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Linus Walleij 03a3f19ce3 gpio: mc33880: Include the right header 
This is a driver so only include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Linus Walleij 25424b864b gpio: max730x: Include the right header 
This is a driver so only include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Linus Walleij cec93b024b gpio: lynxpoint: Include the right header 
This is a driver so only include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Linus Walleij 11975f9e08 gpio: lpc32xx: Include the right header 
This is a driver so only include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Linus Walleij 284ead59d3 gpio: lp873x: Include the right header 
This is a driver so include only <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Linus Walleij e92a5c6160 gpio: lp3943: Include the right header 
This is a driver so only include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Linus Walleij a4e5db831a gpio: loongson: Use BIT() macros 
This switches the Loongson driver over to using the bitops BIT()
macros and drops some local variables and make the code easier
to read (in my opinion).

Cc: Keguang Zhang <keguang.zhang@gmail.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: linux-mips@linux-mips.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Linus Walleij 70e703e741 gpio: loongson: Create a dynamic platform device 
It is pretty helpful to create some kind of device for backing the
GPIO chips, especially when preparing the driver for using
GENERIC_GPIO, so let's create a simple platform device and a simple
platform device driver and create the gpiochip in the .probe() routine
for the device driver. Keep all at the core initcall so the behaviour
is the same as before.

Cc: Keguang Zhang <keguang.zhang@gmail.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: linux-mips@linux-mips.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Linus Walleij f105edf700 gpio: loongson: Use right include 
The driver includes <linux/gpio.h> which is wrong, rely on
<linux/gpio/driver.h> and remove to call to gpio_set_value() in
favor of calling the internal function. Move functions around to
avoid forward declarations.

Cc: Keguang Zhang <keguang.zhang@gmail.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: linux-mips@linux-mips.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Bartosz Golaszewski a411e81e61 gpiolib: add hogs support for machine code 
Board files constitute a significant part of the users of the legacy
GPIO framework. In many cases they only export a line and set its
desired value. We could use GPIO hogs for that like we do for DT and
ACPI but there's no support for that in machine code.

This patch proposes to extend the machine.h API with support for
registering hog tables in board files.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Colin Ian King 192a35b134 gpio: 104-dio-48e: make array 'ports' static, shrinks object size 
Don't populate the const read-only array 'ports' on the stack but instead
make it static. Makes the object code smaller by over 100 buytes:

Before:
   text	   data	    bss	    dec	    hex	filename
  10959	   4952	    832	  16743	   4167	drivers/gpio/gpio-104-dio-48e.o

After:
   text	   data	    bss	    dec	    hex	filename
  10790	   5008	    832	  16630	   40f6	drivers/gpio/gpio-104-dio-48e.o

(gcc version 7.2.0 x86_64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Baolin Wang 92da8b9deb gpio: pmic_eic: Add edge trigger emulation for PMIC EIC 
This patch will toggle the EIC level to emulate the edge trigger to
support PMIC EIC egdge trigger function, which is required by gpio-keys
driver.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
Baolin Wang 7bf0d7f622 gpio: eic: Add edge trigger emulation for EIC 
The Spreadtrum debounce EIC and latch EIC can not support edge trigger,
but most GPIO users (like gpio-key driver) only use the edge trigger,
thus the EIC driver need add some support to emulate the edge trigger
to satisfy this requirement.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-05-16 14:35:24 +02:00
William Breathitt Gray e026646c17 gpio: pcie-idio-24: Fix off-by-one error in get_multiple loop 
The PCIe-IDIO-24 features 8 bits of TTL GPIO which may be configured for
output or input. This patch fixes an off-by-one error in the loop
conditional for the get_multiple callback so that the TTL GPIO are
handled.

Fixes: ca37081595 ("gpio: pcie-idio-24: Implement get_multiple/set_multiple callbacks")
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-04-30 10:48:08 +02:00
Laura Abbott 12f92ccc5b gpio: xra1403: Switch to a fixed upper bound for registers 
Geert Uytterhoeven pointed out that the number of register was a
fixed upper bound so there's no need to use a dynamically allocated
array in place of a VLA. Use the defined upper bound.

Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Laura Abbott <labbott@redhat.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-04-27 01:06:21 +02:00
William Breathitt Gray 304440aa96 gpio: pcie-idio-24: Fix port memory offset for get_multiple/set_multiple callbacks 
The ioread8/iowrite8 functions expect a memory offset argument. This
patch fixes the ports array to provide the memory addresses of the
respective device I/O registers.

Fixes: ca37081595 ("gpio: pcie-idio-24: Implement get_multiple/set_multiple callbacks")
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-04-27 00:56:11 +02:00
William Breathitt Gray aaf96e51de gpio: pci-idio-16: Fix port memory offset for get_multiple callback 
The ioread8 function expects a memory offset argument. This patch fixes
the ports array to provide the memory addresses of the respective device
I/O registers.

Fixes: 810ebfc5ef ("gpio: pci-idio-16: Implement get_multiple callback")
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-04-27 00:55:16 +02:00
Uwe Kleine-König f001cc351a gpio: fix error path in lineevent_create 
If gpiod_request() fails the cleanup must not call gpiod_free().

Cc: stable@vger.kernel.org
Fixes: 61f922db72 ("gpio: userspace ABI for reading GPIO line events")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-04-27 00:43:03 +02:00
Timur Tabi ab3dbcf78f gpioib: do not free unrequested descriptors 
If the main loop in linehandle_create() encounters an error, it
unwinds completely by freeing all previously requested GPIO
descriptors.  However, if the error occurs in the beginning of
the loop before that GPIO is requested, then the exit code
attempts to free a null descriptor.  If extrachecks is enabled,
gpiod_free() triggers a WARN_ON.

Instead, keep a separate count of legitimate GPIOs so that only
those are freed.

Cc: stable@vger.kernel.org
Fixes: d7c51b47ac ("gpio: userspace ABI for reading/writing GPIO lines")
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-04-26 11:27:18 +02:00
Govert Overgaauw f241632fd0 gpio: fix aspeed_gpio unmask irq 
The unmask function disables all interrupts in a bank when unmasking an
interrupt. Only disable the given interrupt.

Cc: stable@vger.kernel.org
Signed-off-by: Govert Overgaauw <govert.overgaauw@prodrive-technologies.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-04-26 11:13:04 +02:00
Linus Torvalds 9c2dd8405c DeviceTree updates for 4.17: 
- Sync dtc to upstream version v1.4.6-9-gaadd0b65c987. This adds a bunch
   more warnings (hidden behind W=1).
 
 - Build dtc lexer and parser files instead of using shipped versions.
 
 - Rework overlay apply API to take an FDT as input and apply overlays in
   a single step.
 
 - Add a phandle lookup cache. This improves boot time by hundreds of
   msec on systems with large DT.
 
 - Add trivial mcp4017/18/19 potentiometers bindings.
 
 - Remove VLA stack usage in DT code.
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Merge tag 'devicetree-for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull DeviceTree updates from Rob Herring:

 - Sync dtc to upstream version v1.4.6-9-gaadd0b65c987. This adds a
   bunch more warnings (hidden behind W=1).

 - Build dtc lexer and parser files instead of using shipped versions.

 - Rework overlay apply API to take an FDT as input and apply overlays
   in a single step.

 - Add a phandle lookup cache. This improves boot time by hundreds of
   msec on systems with large DT.

 - Add trivial mcp4017/18/19 potentiometers bindings.

 - Remove VLA stack usage in DT code.

* tag 'devicetree-for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (26 commits)
  of: unittest: fix an error code in of_unittest_apply_overlay()
  of: unittest: move misplaced function declaration
  of: unittest: Remove VLA stack usage
  of: overlay: Fix forgotten reference to of_overlay_apply()
  of: Documentation: Fix forgotten reference to of_overlay_apply()
  of: unittest: local return value variable related cleanups
  of: unittest: remove unneeded local return value variables
  dt-bindings: trivial: add various mcp4017/18/19 potentiometers
  of: unittest: fix an error test in of_unittest_overlay_8()
  of: cache phandle nodes to reduce cost of of_find_node_by_phandle()
  dt-bindings: rockchip-dw-mshc: use consistent clock names
  MAINTAINERS: Add linux/of_*.h headers to appropriate subsystems
  scripts: turn off some new dtc warnings by default
  scripts/dtc: Update to upstream version v1.4.6-9-gaadd0b65c987
  scripts/dtc: generate lexer and parser during build instead of shipping
  powerpc: boot: add strrchr function
  of: overlay: do not include path in full_name of added nodes
  of: unittest: clean up changeset test
  arm64/efi: Make strrchr() available to the EFI namespace
  ARM: boot: add strrchr function
  ...
 2018-04-05 21:03:42 -07:00
Linus Torvalds 1b2951dd99 This is the bulk of GPIO changes for the v4.17 kernel cycle: 
New drivers:
 
 - Nintendo Wii GameCube GPIO, known as "Hollywood"
 
 - Raspberry Pi mailbox service GPIO expander
 
 - Spreadtrum main SC9860 SoC and IEC GPIO controllers.
 
 Improvements:
 
 - Implemented .get_multiple() callback for most of the
   high-performance industrial GPIO cards for the ISA bus.
 
 - ISA GPIO drivers now select the ISA_BUS_API instead of
   depending on it. This is merged with the same pattern
   for all the ISA drivers and some other Kconfig cleanups
   related to this.
 
 Cleanup:
 
 - Delete the TZ1090 GPIO drivers following the deletion of
   this SoC from the ARM tree.
 
 - Move the documentation over to driver-api to conform with
   the rest of the kernel documentation build.
 
 - Continue to make the GPIO drivers include only
   <linux/gpio/driver.h> and not the too broad <linux/gpio.h>
   that we want to get rid of.
 
 - Managed to remove VLA allocation from two drivers pending
   more fixes in this area for the next merge window.
 
 - Misc janitorial fixes.
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Merge tag 'gpio-v4.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO changes for the v4.17 kernel cycle:

  New drivers:

   - Nintendo Wii GameCube GPIO, known as "Hollywood"

   - Raspberry Pi mailbox service GPIO expander

   - Spreadtrum main SC9860 SoC and IEC GPIO controllers.

  Improvements:

   - Implemented .get_multiple() callback for most of the
     high-performance industrial GPIO cards for the ISA bus.

   - ISA GPIO drivers now select the ISA_BUS_API instead of depending on
     it. This is merged with the same pattern for all the ISA drivers
     and some other Kconfig cleanups related to this.

  Cleanup:

   - Delete the TZ1090 GPIO drivers following the deletion of this SoC
     from the ARM tree.

   - Move the documentation over to driver-api to conform with the rest
     of the kernel documentation build.

   - Continue to make the GPIO drivers include only
     <linux/gpio/driver.h> and not the too broad <linux/gpio.h> that we
     want to get rid of.

   - Managed to remove VLA allocation from two drivers pending more
     fixes in this area for the next merge window.

   - Misc janitorial fixes"

* tag 'gpio-v4.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (77 commits)
  gpio: Add Spreadtrum PMIC EIC driver support
  gpio: Add Spreadtrum EIC driver support
  dt-bindings: gpio: Add Spreadtrum EIC controller documentation
  gpio: ath79: Fix potential NULL dereference in ath79_gpio_probe()
  pinctrl: qcom: Don't allow protected pins to be requested
  gpiolib: Support 'gpio-reserved-ranges' property
  gpiolib: Change bitmap allocation to kmalloc_array
  gpiolib: Extract mask allocation into subroutine
  dt-bindings: gpio: Add a gpio-reserved-ranges property
  gpio: mockup: fix a potential crash when creating debugfs entries
  gpio: pca953x: add compatibility for pcal6524 and pcal9555a
  gpio: dwapb: Add support for a bus clock
  gpio: Remove VLA from xra1403 driver
  gpio: Remove VLA from MAX3191X driver
  gpio: ws16c48: Implement get_multiple callback
  gpio: gpio-mm: Implement get_multiple callback
  gpio: 104-idi-48: Implement get_multiple callback
  gpio: 104-dio-48e: Implement get_multiple callback
  gpio: pcie-idio-24: Implement get_multiple/set_multiple callbacks
  gpio: pci-idio-16: Implement get_multiple callback
  ...
 2018-04-05 09:51:41 -07:00
Linus Torvalds f5a8eb632b arch: remove obsolete architecture ports 
This removes the entire architecture code for blackfin, cris, frv, m32r,
 metag, mn10300, score, and tile, including the associated device drivers.
 
 I have been working with the (former) maintainers for each one to ensure
 that my interpretation was right and the code is definitely unused in
 mainline kernels. Many had fond memories of working on the respective
 ports to start with and getting them included in upstream, but also saw
 no point in keeping the port alive without any users.
 
 In the end, it seems that while the eight architectures are extremely
 different, they all suffered the same fate: There was one company
 in charge of an SoC line, a CPU microarchitecture and a software
 ecosystem, which was more costly than licensing newer off-the-shelf
 CPU cores from a third party (typically ARM, MIPS, or RISC-V). It seems
 that all the SoC product lines are still around, but have not used the
 custom CPU architectures for several years at this point. In contrast,
 CPU instruction sets that remain popular and have actively maintained
 kernel ports tend to all be used across multiple licensees.
 
 The removal came out of a discussion that is now documented at
 https://lwn.net/Articles/748074/. Unlike the original plans, I'm not
 marking any ports as deprecated but remove them all at once after I made
 sure that they are all unused. Some architectures (notably tile, mn10300,
 and blackfin) are still being shipped in products with old kernels,
 but those products will never be updated to newer kernel releases.
 
 After this series, we still have a few architectures without mainline
 gcc support:
 
 - unicore32 and hexagon both have very outdated gcc releases, but the
   maintainers promised to work on providing something newer. At least
   in case of hexagon, this will only be llvm, not gcc.
 
 - openrisc, risc-v and nds32 are still in the process of finishing their
   support or getting it added to mainline gcc in the first place.
   They all have patched gcc-7.3 ports that work to some degree, but
   complete upstream support won't happen before gcc-8.1. Csky posted
   their first kernel patch set last week, their situation will be similar.
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Merge tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pul removal of obsolete architecture ports from Arnd Bergmann:
 "This removes the entire architecture code for blackfin, cris, frv,
  m32r, metag, mn10300, score, and tile, including the associated device
  drivers.

  I have been working with the (former) maintainers for each one to
  ensure that my interpretation was right and the code is definitely
  unused in mainline kernels. Many had fond memories of working on the
  respective ports to start with and getting them included in upstream,
  but also saw no point in keeping the port alive without any users.

  In the end, it seems that while the eight architectures are extremely
  different, they all suffered the same fate: There was one company in
  charge of an SoC line, a CPU microarchitecture and a software
  ecosystem, which was more costly than licensing newer off-the-shelf
  CPU cores from a third party (typically ARM, MIPS, or RISC-V). It
  seems that all the SoC product lines are still around, but have not
  used the custom CPU architectures for several years at this point. In
  contrast, CPU instruction sets that remain popular and have actively
  maintained kernel ports tend to all be used across multiple licensees.

  [ See the new nds32 port merged in the previous commit for the next
    generation of "one company in charge of an SoC line, a CPU
    microarchitecture and a software ecosystem"   - Linus ]

  The removal came out of a discussion that is now documented at
  https://lwn.net/Articles/748074/. Unlike the original plans, I'm not
  marking any ports as deprecated but remove them all at once after I
  made sure that they are all unused. Some architectures (notably tile,
  mn10300, and blackfin) are still being shipped in products with old
  kernels, but those products will never be updated to newer kernel
  releases.

  After this series, we still have a few architectures without mainline
  gcc support:

   - unicore32 and hexagon both have very outdated gcc releases, but the
     maintainers promised to work on providing something newer. At least
     in case of hexagon, this will only be llvm, not gcc.

   - openrisc, risc-v and nds32 are still in the process of finishing
     their support or getting it added to mainline gcc in the first
     place. They all have patched gcc-7.3 ports that work to some
     degree, but complete upstream support won't happen before gcc-8.1.
     Csky posted their first kernel patch set last week, their situation
     will be similar

  [ Palmer Dabbelt points out that RISC-V support is in mainline gcc
    since gcc-7, although gcc-7.3.0 is the recommended minimum  - Linus ]"

This really says it all:

 2498 files changed, 95 insertions(+), 467668 deletions(-)

* tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (74 commits)
  MAINTAINERS: UNICORE32: Change email account
  staging: iio: remove iio-trig-bfin-timer driver
  tty: hvc: remove tile driver
  tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers
  serial: remove tile uart driver
  serial: remove m32r_sio driver
  serial: remove blackfin drivers
  serial: remove cris/etrax uart drivers
  usb: Remove Blackfin references in USB support
  usb: isp1362: remove blackfin arch glue
  usb: musb: remove blackfin port
  usb: host: remove tilegx platform glue
  pwm: remove pwm-bfin driver
  i2c: remove bfin-twi driver
  spi: remove blackfin related host drivers
  watchdog: remove bfin_wdt driver
  can: remove bfin_can driver
  mmc: remove bfin_sdh driver
  input: misc: remove blackfin rotary driver
  input: keyboard: remove bf54x driver
  ...
 2018-04-02 20:20:12 -07:00
Baolin Wang 348f3cde84 gpio: Add Spreadtrum PMIC EIC driver support 
The Spreadtrum PMIC EIC controller contains only one bank of debounce EIC,
and this bank contains 16 EICs. Each EIC can only be used as input mode,
as well as supporting the debounce and the capability to trigger interrupts
when detecting input signals.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-27 15:51:22 +02:00
Baolin Wang 25518e024e gpio: Add Spreadtrum EIC driver support 
The Spreadtrum digital-chip EIC controller has 4 sub-modules: debounce EIC,
latch EIC, async EIC and sync EIC, and each sub-module can has multiple
banks and each bank contains 8 EICs.

Each EIC can only be used as input mode, and has the capability to trigger
interrupts when detecting input signals.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-27 15:51:17 +02:00
Wei Yongjun f79b55d9b9 gpio: ath79: Fix potential NULL dereference in ath79_gpio_probe() 
platform_get_resource() may return NULL, add proper
check to avoid potential NULL dereferencing.

This is detected by Coccinelle semantic patch.

@@
expression pdev, res, n, t, e, e1, e2;
@@

res = platform_get_resource(pdev, t, n);
+ if (!res)
+   return -EINVAL;
... when != res == NULL
e = devm_ioremap(e1, res->start, e2);

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
[albeu@free.fr: Fixed patch to apply on current tree]
Signed-off-by: Alban Bedel <albeu@free.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-27 15:42:29 +02:00
Linus Walleij 89b0b4e2d3 Merge branch 'gpio-reserved-ranges' into devel 2018-03-27 15:34:40 +02:00
Stephen Boyd 726cb3ba49 gpiolib: Support 'gpio-reserved-ranges' property 
Some qcom platforms make some GPIOs or pins unavailable for use by
non-secure operating systems, and thus reading or writing the registers
for those pins will cause access control issues. Add support for a DT
property to describe the set of GPIOs that are available for use so that
higher level OSes are able to know what pins to avoid reading/writing.
Non-DT platforms can add support by directly updating the
chip->valid_mask.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Timur Tabi <timur@codeaurora.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-27 15:34:20 +02:00
Stephen Boyd ace56935ff gpiolib: Change bitmap allocation to kmalloc_array 
We don't need to clear out these bits when we set them immediately
after. Use kmalloc_array() to skip clearing the bits.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Timur Tabi <timur@codeaurora.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-27 15:34:13 +02:00
Stephen Boyd e4371f6e07 gpiolib: Extract mask allocation into subroutine 
We're going to use similar code to allocate and set all the bits in a
mask for valid gpios to use. Extract the code from the irqchip version
so it can be reused.

Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Timur Tabi <timur@codeaurora.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-27 15:34:07 +02:00
Bartosz Golaszewski 6cb9215bae gpio: mockup: fix a potential crash when creating debugfs entries 
If we failed to create the top debugfs directory, we must not try to
create the child nodes. We currently only check if gpio_mockup_dbg_dir
is not NULL, but it can also contain an errno if debugfs is disabled
in build options. Use IS_ERR_OR_NULL() instead.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-27 15:18:20 +02:00
H. Nikolaus Schaller 3a711e0dd4 gpio: pca953x: add compatibility for pcal6524 and pcal9555a 
The Pyra-Handheld originally used the tca6424 but recently we have
replaced it by the pin and package compatible pcal6524. So let's
add this to the bindings and the driver.

And while we are at it, the pcal9555a does not have a compatible entry
either but is already supported by the device id table.

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-27 15:18:20 +02:00
Phil Edworthy e6bf37736f gpio: dwapb: Add support for a bus clock 
Enable an optional bus clock provided by DT.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-27 15:18:19 +02:00
Laura Abbott 13b5319e92 gpio: Remove VLA from xra1403 driver 
The new challenge is to remove VLAs from the kernel
(see https://lkml.org/lkml/2018/3/7/621)

This patch replaces a VLA with an appropriate call to kmalloc_array.

Signed-off-by: Laura Abbott <labbott@redhat.com>
Reviewed-by: Nandor Han <nandor.han@ge.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-27 15:18:19 +02:00
Laura Abbott 48da181dac gpio: Remove VLA from MAX3191X driver 
The new challenge is to remove VLAs from the kernel
(see https://lkml.org/lkml/2018/3/7/621)

This patch replaces several a VLA with an appropriate call to
kmalloc_array.

Signed-off-by: Laura Abbott <labbott@redhat.com>
Reviewed-and-tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-27 15:18:06 +02:00
Arnd Bergmann 9a95e8d25a gpio: remove etraxfs driver 
The cris architecture is getting removed, so we no longer need the
etraxfs driver.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 2018-03-26 15:56:53 +02:00
William Breathitt Gray a8ff510dbc gpio: ws16c48: Implement get_multiple callback 
The WinSystems WS16C48 device provides 48 lines of digital I/O accessed
via six 8-bit ports. Since eight input lines are acquired on a single
port input read, the WS16C48 GPIO driver may improve multiple input
reads by utilizing a get_multiple callback. This patch implements the
ws16c48_gpio_get_multiple function which serves as the respective
get_multiple callback.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-26 10:28:19 +02:00
William Breathitt Gray 41b251318a gpio: gpio-mm: Implement get_multiple callback 
The Diamond Systems GPIO-MM series of devices contain two 82C55A
devices, which each feature three 8-bit ports of I/O. Since eight input
lines are acquired on a single port input read, the GPIO-MM GPIO driver
may improve multiple input reads by utilizing a get_multiple callback.
This patch implements the gpiomm_gpio_get_multiple function which serves
as the respective get_multiple callback.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-26 10:27:31 +02:00
William Breathitt Gray f72b10713c gpio: 104-idi-48: Implement get_multiple callback 
The ACCES I/O 104-IDI-48 series of devices provides 48
optically-isolated inputs accessed via six 8-bit ports. Since eight
input lines are acquired on a single port input read, the 104-IDI-48
GPIO driver may improve multiple input reads by utilizing a get_multiple
callback. This patch implements the idi_48_gpio_get_multiple function
which serves as the respective get_multiple callback.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-26 10:26:38 +02:00
William Breathitt Gray d2d02bcdd5 gpio: 104-dio-48e: Implement get_multiple callback 
The ACCES I/O 104-DIO-48E series of devices contain two Programmable
Peripheral Interface (PPI) chips of type 82C55, which each feature three
8-bit ports of I/O. Since eight input lines are acquired on a single
port input read, the 104-DIO-48E GPIO driver may improve multiple input
reads by utilizing a get_multiple callback. This patch implements the
dio48e_gpio_get_multiple function which serves as the respective
get_multiple callback.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-26 10:26:14 +02:00
William Breathitt Gray ca37081595 gpio: pcie-idio-24: Implement get_multiple/set_multiple callbacks 
The ACCES I/O PCIe-IDIO-24 series of devices provides 24
optically-isolated digital I/O accessed via six 8-bit ports. Since eight
input lines are acquired on a single port input read -- and similarly
eight output lines are set on a single port output write -- the
PCIe-IDIO-24 GPIO driver may improve multiple I/O reads/writes by
utilizing a get_multiple/set_multiple callbacks. This patch implements
the idio_24_gpio_get_multiple function which serves as the respective
get_multiple callback, and implements the idio_24_gpio_set_multiple
function which serves as the respective set_multiple callback.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-26 10:24:55 +02:00
William Breathitt Gray 810ebfc5ef gpio: pci-idio-16: Implement get_multiple callback 
The ACCES I/O PCI-IDIO-16 series of devices provides 16
optically-isolated digital inputs accessed via two 8-bit ports. Since
eight input lines are acquired on a single port input read, the
PCI-IDIO-16 GPIO driver may improve multiple input reads by utilizing a
get_multiple callback. This patch implements the
idio_16_gpio_get_multiple function which serves as the respective
get_multiple callback.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-26 10:24:06 +02:00
William Breathitt Gray 15f59cfff9 gpio: 104-idio-16: Implement get_multiple callback 
The ACCES I/O 104-IDIO-16 series of devices provides 16
optically-isolated digital inputs accessed via two 8-bit ports. Since
eight input lines are acquired on a single port input read, the
104-IDIO-16 GPIO driver may improve multiple input reads by utilizing a
get_multiple callback. This patch implements the
idio_16_gpio_get_multiple function which serves as the respective
get_multiple callback.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-26 10:10:18 +02:00
Linus Walleij 6e9554a48b gpio: ks8695: Include the right header 
This driver is a pure GPIO driver and should only include
<linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-19 01:50:31 +01:00
Linus Walleij 430f649987 gpio: kempld: Include the right header 
This driver is a pure GPIO driver and should only include
<linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-19 01:50:31 +01:00
Linus Walleij 96d0d03dc4 gpio: janz-ttl: Use BIT() macro 
This makes the code more readable by using the BIT() macro.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-19 01:50:30 +01:00
Linus Walleij 1c947b7f48 gpio: janz-ttl: Include the right header 
This driver is a pure GPIO driver and should only include
<linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-19 01:50:30 +01:00
Linus Walleij c3a174036f gpio: it87: Include the right header 
This driver is a pure GPIO driver and should only include
<linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-19 01:50:29 +01:00
Linus Walleij 7a8fd1f5cc gpio: ich: Use BIT() macro 
Using BIT() makes (1 << foo) constructions easier to read, and
also account for common mistakes where bit 31 is not working
because of numbers being interpreted as negative unless
specified as unsigned.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-19 01:50:29 +01:00
Linus Walleij 3f4290d4dc gpio: ich: Include the right header 
This driver is a pure GPIO driver and should only include
<linux/gpio/driver.h>. Refrain from using GPIOF_* flags in
the driver, just use 1/0 to return direction.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-19 01:50:29 +01:00
Linus Walleij f63109f0cb gpio: htc-gpio: Include the right header 
This driver is a pure GPIO driver and should only include
<linux/gpio/driver.h>. Drop the include of <linux/gpio.h>
from the platform data header as well, it serves no purpose.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-19 01:50:28 +01:00
Linus Walleij 00d712a930 gpio: grgpio: Include the right header 
This driver is a pure GPIO driver and should only include
<linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-19 01:50:28 +01:00
Linus Walleij 7113ea8a8f gpio: ftgpio010: Drop of_gpio.h include 
This driver does not make use of the functions in
<linux/of_gpio.h> so drop this include.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-19 01:50:24 +01:00
Linus Walleij 7275cb75b9 gpio: em: Use the right include 
The Emma Mobile (EM) GPIO driver uses the too generic include
<linux/gpio.h>. It is a driver so it should just use
<linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-19 01:50:07 +01:00
Linus Walleij d90f2adee4 gpio: ge: Drop of_gpio.h include 
This driver does not make use of the functions in
<linux/of_gpio.h> so drop this include.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-19 01:50:07 +01:00
Linus Walleij 1cb6610aec gpio: dln2: Include proper header 
This driver has no business including <linux/gpio.h>, it is a
driver so include <linux/gpio/driver.h>.

GPIOF_DIR_IN/GPIOF_DIR_OUT are for consumers and should not be
used in drivers to use just 1/0 instead.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-19 01:50:07 +01:00
Linus Walleij 95260c17b2 Linux 4.16-rc5 
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Merge tag 'v4.16-rc5' into devel

Linux 4.16-rc5 merged into the GPIO devel branch to resolve
a nasty conflict between fixes and devel in the RCAR driver.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-18 17:48:59 +01:00
Linus Walleij 4f9a4cd66c gpio: mockup: Update Bamvors mail address 
Bamvor changed his mail so let's updat his mail address
everywhere.

Cc: Bamvor Jian Zhang <bamv2005@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-06 09:04:15 +01:00
Geert Uytterhoeven 9ac79ba9c7 gpio: rcar: Use wakeup_path i.s.o. explicit clock handling 
Since commit ab82fa7da4 ("gpio: rcar: Prevent module clock disable
when wake-up is enabled"), when a GPIO is used for wakeup, the GPIO
block's module clock (if exists) is manually kept running during system
suspend, to make sure the device stays active.

However, this explicit clock handling is merely a workaround for a
failure to properly communicate wakeup information to the device core.

Instead, set the device's power.wakeup_path field, to indicate this
device is part of the wakeup path.  Depending on the PM Domain's
active_wakeup configuration, the genpd core code will keep the device
enabled (and the clock running) during system suspend when needed.
This allows for the removal of all explicit clock handling code from the
driver.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-05 09:01:21 +01:00
Baruch Siach 94337b7261 gpio: raspberrypi-exp: explain Kconfig dependency 
Commit 7ed915059c (gpio: raspberrypi-ext: fix firmware dependency)
fixed the Kconfig dependency to ensure that gpio-raspberrypi-exp is not
built-in when the firmware is a module. But the Kconfig syntax for doing
so is cryptic. Add a comment to make it a little easier.

Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-02 13:00:30 +01:00
Baolin Wang 9a3821c2bb gpio: Add GPIO driver for Spreadtrum SC9860 platform 
The Spreadtrum SC9860 platform GPIO controller contains 16 groups and
each group contains 16 GPIOs. Each GPIO can set input/output and has
the interrupt capability.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-02 11:00:43 +01:00
Arnd Bergmann 7ed915059c gpio: raspberrypi-ext: fix firmware dependency 
When the firmware driver is a loadable module, the gpio driver cannot be
built-in:

drivers/gpio/gpio-raspberrypi-exp.o: In function `rpi_exp_gpio_set':
gpio-raspberrypi-exp.c:(.text+0xb4): undefined reference to `rpi_firmware_property'
drivers/gpio/gpio-raspberrypi-exp.o: In function `rpi_exp_gpio_get':
gpio-raspberrypi-exp.c:(.text+0x1ec): undefined reference to `rpi_firmware_property'
drivers/gpio/gpio-raspberrypi-exp.o: In function `rpi_exp_gpio_get_direction':
gpio-raspberrypi-exp.c:(.text+0x360): undefined reference to `rpi_firmware_property'
drivers/gpio/gpio-raspberrypi-exp.o: In function `rpi_exp_gpio_get_polarity':
gpio-raspberrypi-exp.c:(.text+0x4d4): undefined reference to `rpi_firmware_property'
drivers/gpio/gpio-raspberrypi-exp.o: In function `rpi_exp_gpio_dir_out':
gpio-raspberrypi-exp.c:(.text+0x670): undefined reference to `rpi_firmware_property'
drivers/gpio/gpio-raspberrypi-exp.o:gpio-raspberrypi-exp.c:(.text+0x7fc): more undefined references to `rpi_firmware_property' follow
drivers/gpio/gpio-raspberrypi-exp.o: In function `rpi_exp_gpio_dir_in':
drivers/gpio/gpio-raspberrypi-exp.o: In function `rpi_exp_gpio_probe':
gpio-raspberrypi-exp.c:(.text+0x93c): undefined reference to `rpi_firmware_get'

We already have a Kconfig dependency for it, but when compile-testing, it
is disregarded.

This changes the dependency so that compile-testing is only done when the
firmware driver is completely disabled.

Fixes: a98d90e7d5 ("gpio: raspberrypi-exp: Driver for RPi3 GPIO expander via mailbox service")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-02 09:46:45 +01:00
Wang Dongsheng 9d5a1f2ca6 gpiolib: friendly debug information for consumer 
"failed" maybe makes observer confuse when a consumer can not
lookup, so change to a friendly information.

Signed-off-by: Wang Dongsheng <dongsheng.wang@hxt-semitech.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-02 08:45:41 +01:00
James Hogan 8f6d3b0147 gpio: Drop TZ1090 drivers 
Now that arch/metag/ has been removed, along with TZ1090 SoC support,
remove the TZ1090 GPIO drivers. They are of no value without the
architecture and SoC platform code.

Signed-off-by: James Hogan <jhogan@kernel.org>
Cc: linux-gpio@vger.kernel.org
Cc: linux-metag@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-03-01 15:31:02 +01:00
Chen-Yu Tsai ce27fb2c56 gpio: Handle deferred probing in of_find_gpio() properly 
of_get_named_gpiod_flags() used directly in of_find_gpio() or indirectly
through of_find_spi_gpio() or of_find_regulator_gpio() can return
-EPROBE_DEFER. This gets overwritten by the subsequent of_find_*_gpio()
calls.

This patch fixes this by trying of_find_spi_gpio() or
of_find_regulator_gpio() only if deferred probing was not requested by
the previous of_get_named_gpiod_flags() call.

Fixes: 6a537d4846 ("gpio: of: Support regulator nonstandard GPIO properties")
Fixes: c858233902 ("gpio: of: Support SPI nonstandard GPIO properties")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
[Augmented to fit with Maxime's patch]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-27 09:48:07 +01:00
Maxime Ripard 6662ae6af8 gpiolib: Keep returning EPROBE_DEFER when we should 
Commits c858233902 ("gpio: of: Support SPI nonstandard GPIO properties")
and 6a537d4846 ("gpio: of: Support regulator nonstandard GPIO
properties") have introduced a regression in the way error codes from
of_get_named_gpiod_flags are handled.

Previously, those errors codes were returned immediately, but the two
commits mentioned above are now overwriting the error pointer, meaning that
whatever value has been returned will be dropped in favor of whatever the
two new functions will return.

This might not be a big deal except for EPROBE_DEFER, on which GPIOlib
customers will depend on, and that will now be returned as an hard error
which means that they will not probe anymore, instead of gently deferring
their probe.

Since EPROBE_DEFER basically means that we have found a valid property but
there was no GPIO controller registered to handle it, fix this issues by
returning it as soon as we encounter it.

Fixes: c858233902 ("gpio: of: Support SPI nonstandard GPIO properties")
Fixes: 6a537d4846 ("gpio: of: Support regulator nonstandard GPIO properties")
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
[Fold in fix to the fix]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-27 09:47:32 +01:00
Maciej S. Szmigiero b995ff3b30 Revert "gpio: winbond: fix ISA_BUS_API dependency" 
This reverts commit 92a8046c9d.

Now that the patch series changing ISA_BUS_API dependency to selection
was merged this reversion will do the same for gpio-winbond driver to
make it consistent with other ISA bus gpio drivers.

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-26 11:27:30 +01:00
Rajmohan Mani ca34b4f0be gpio: tps68470: Update to SPDX license identifier 
Remove the GPL v2 license boilerplate and update with
the SPDX license identifier.

Signed-off-by: Rajmohan Mani <rajmohan.mani@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-23 15:26:42 +01:00
William Breathitt Gray 35decc803c gpio: Change ISA_BUS_API dependency to selection 
The ISA_BUS_API Kconfig option enables the compilation of the ISA bus
driver. The ISA bus driver does not perform any hardware interaction,
and is instead just a thin layer of software abstraction to eliminate
boilerplate code common to ISA-style device drivers. Since ISA_BUS_API
has no dependencies and does not jeopardize the integrity of the system
when enabled, drivers should select it when the ISA bus driver
functionality is needed.

Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-22 16:15:33 +01:00
Hien Dang 51750fb167 gpio: gpio-rcar: Support S2RAM 
This patch adds an implementation that saves and restores the state of
GPIO configuration on suspend and resume.

Signed-off-by: Hien Dang <hien.dang.eb@renesas.com>
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
[Modify structure of the bank info to simplify a saving registers]
[Remove DEV_PM_OPS macro]
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Tested-by: Nguyen Viet Dung <dung.nguyen.aj@renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-22 15:50:20 +01:00
Linus Walleij 62c16234bb gpio: dwapb: Call directly into the gpiochip to read value 
We were going out through the (legacy) gpio API to read the value
of a line to set up polarity inversion. This is abusive. Do something
less abusive by looking up the actual struct gpio_chip *
instance and calling .get() directly on it.

Acked-by: Hoan Tran <hotran@apm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-22 15:31:19 +01:00
Linus Walleij 89f99feb9c gpio: dwapb: Use "stride" rather than "size" for register distance 
This terminology is more precise. Also cut the stride calculation
in the preprocessor, it confuses more than it helps when reading
the driver.

Acked-by: Hoan Tran <hotran@apm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-22 15:30:44 +01:00
Linus Walleij 63f2dc0a76 gpio: include consumer header in gpiolib.h 
We are forward-declaring enum gpiod_flags, but this is not referenced
by pointer, it is a real struct member, so we need to actually include
it to compile anything including the local gpiolib.h header.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-22 15:30:31 +01:00
Markus Elfring 75f8f5af0c gpio-intel-mid: Delete an error message 
Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-22 15:29:05 +01:00
Axel Lin 2773eb2f98 gpio: tegra: Convert to use DEFINE_SHOW_ATTRIBUTE macro 
Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-22 15:25:40 +01:00
Markus Elfring 4b7edaef79 gpio: merrifield: Delete an error message 
Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-22 15:25:40 +01:00
Markus Elfring 4aed95793f gpio-ml-ioh: Delete an error message 
Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-22 15:25:39 +01:00
Markus Elfring f97364c9b8 gpio: omap: Improve a size determination 
Replace the specification of a data structure by a pointer dereference
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-22 15:25:32 +01:00
Markus Elfring 9117d40b5d gpio: omap: Delete an error message 
Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-22 15:25:23 +01:00
Markus Elfring 2c3087e164 gpio: timberdale: Improve a size determination 
Replace the specification of a data structure by a pointer dereference
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-22 15:14:58 +01:00
Markus Elfring 587ca5ed56 gpio: timberdale: Delete an error message 
Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-22 15:14:03 +01:00
Jonathan Neuschäfer 8f55fed3c9 gpio: Add GPIO driver for Nintendo Wii 
The Nintendo Wii's chipset (called "Hollywood") has a GPIO controller
that supports a configurable number of pins (up to 32), interrupts, and
some special mechanisms to share the controller between the system's
security processor (an ARM926) and the PowerPC CPU. Pin multiplexing is
not supported.

This patch adds a basic driver for this GPIO controller. Interrupt
support will come in a later patch.

This patch is based on code developed by Albert Herranz and the GameCube
Linux Team, file arch/powerpc/platforms/embedded6xx/hlwd-gpio.c,
available at https://github.com/DeltaResero/GC-Wii-Linux-Kernels, but
has grown quite dissimilar.

v3:
- Do some style cleanups, as suggest by Andy Shevchenko

v2:
- Change hlwd_gpio_driver.driver.name to "gpio-hlwd" to match the
  filename (was "hlwd_gpio")
- Remove unnecessary include of linux/of_gpio.h, as suggested by Linus
  Walleij.
- Add struct device pointer to context struct to make it possible to use
  dev_info(hlwd->dev, "..."), as suggested by Linus Walleij
- Use the GPIO_GENERIC library to reduce code size, as suggested by
  Linus Walleij
- Use iowrite32be instead of __raw_writel for big-endian MMIO access, as
  suggested by Linus Walleij
- Remove commit message paragraph suggesting to diff against the
  original driver, because it's so different now

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Cc: Albert Herranz <albert_herranz@yahoo.es>
Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-22 13:54:35 +01:00
Dave Stevenson a98d90e7d5 gpio: raspberrypi-exp: Driver for RPi3 GPIO expander via mailbox service 
Pi3 and Compute Module 3 have a GPIO expander that the
VPU communicates with.
There is a mailbox service that now allows control of this
expander, so add a kernel driver that can make use of it.

Reviewed-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-22 13:49:59 +01:00
Linus Walleij 69a87f290b gpio: ftgpio010: Fix some more registers 
There is a register for "bypass" which seems to not be
used for anything in some silicon designs, but may be used
in others, and there is both a raw and masked interrupt
status register.

Define them all for clarity, no semantic changes.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-13 08:17:45 +01:00
Stephen Boyd c11e6f0f04 gpio: Support gpio nexus dt bindings 
Platforms like 96boards have a standardized connector/expansion
slot that exposes signals like GPIOs to expansion boards in an
SoC agnostic way. We'd like the DT overlays for the expansion
boards to be written once without knowledge of the SoC on the
other side of the connector. This avoids the unscalable
combinatorial explosion of a different DT overlay for each
expansion board and SoC pair.

Now that we have nexus support in the OF core let's change the
function call here that parses the phandle lists of gpios to use
the nexus variant. This allows us to remap phandles and their
arguments through any number of nexus nodes and end up with the
actual gpio provider being used.

Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
 2018-02-12 08:37:59 -06:00
David Lechner 3c87d7c874 gpio: davinci: add support for pinmux gpio ranges 
This adds support for the pinmux gpio ranges feature to the DaVinci gpio
driver. Only device tree is supported since the non-DT boards don't
use a generic pinmux controller.

Cc: Keerthy <j-keerthy@ti.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-12 09:36:06 +01:00
Markus Elfring b5cd7802dd gpio-wm831x: Use seq_putc() in wm831x_gpio_dbg_show() 
A single character (line break) should be put into a sequence.
Thus use the corresponding function "seq_putc".

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-02-12 09:36:06 +01:00
Linus Torvalds a9a08845e9 vfs: do bulk POLL* -> EPOLL* replacement 
This is the mindless scripted replacement of kernel use of POLL*
variables as described by Al, done by this script:

    for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
        L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
        for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
    done

with de-mangling cleanups yet to come.

NOTE! On almost all architectures, the EPOLL* constants have the same
values as the POLL* constants do.  But they keyword here is "almost".
For various bad reasons they aren't the same, and epoll() doesn't
actually work quite correctly in some cases due to this on Sparc et al.

The next patch from Al will sort out the final differences, and we
should be all done.

Scripted-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2018-02-11 14:34:03 -08:00
Linus Torvalds ef991796be This is the bulk of pin control changes for the v4.16 kernel cycle: 
Core changes:
 
 - After lengthy discussions and partly due to my ignorance, we have
   merged a patch making pinctrl_force_default() and pinctrl_force_sleep()
   reprogram the states into the hardware of any hogged pins, even
   if they are already in the desired state. This only apply to hogged
   pins since groups of pins owned by drivers need to be managed by
   each driver, lest they could not do things like runtime PM and
   put pins to sleeping state even if the system as a whole is not
   in sleep.
 
 New drivers:
 
 - New driver for the Microsemi Ocelot SoC. This is used in ethernet
   switches.
 
 - The X-Powers AXP209 GPIO driver was extended to also deal with pin
   control and moved over from the GPIO subsystem. This circuit is
   a mixed-mode integrated circuit which is part of AllWinner designs.
 
 - New subdriver for the Qualcomm MSM8998 SoC, core of a high end
   mobile devices (phones) chipset.
 
 - New subdriver for the ST Microelectronics STM32MP157 MPU and
   STM32F769 MCU from the STM32 family.
 
 - New subdriver for the MediaTek MT7622 SoC. This is used for routers,
   repeater, gateways and such network infrastructure.
 
 - New subdriver for the NXP (former Freescale) i.MX 6ULL. This SoC has
   multimedia features and target "smart devices", I guess in-car
   entertainment, in-flight entertainment, industrial control panels etc.
 
 General improvements:
 
 - Incremental improvements on the SH-PFC subdrivers for things like
   the CAN bus.
 
 - Enable the glitch filter on Baytrail GPIOs used for interrupts.
 
 - Proper handling of pins to GPIO ranges on the Semtec SX150X
 
 - An IRQ setup ordering fix on MCP23S08.
 
 - A good set of janitorial coding style fixes.
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Merge tag 'pinctrl-v4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull pin control updates from Linus Walleij:
 "This is the bulk of pin control changes for the v4.16 kernel cycle.
  Like with GPIO it is actually a bit calm this time.

  Core changes:

   - After lengthy discussions and partly due to my ignorance, we have
     merged a patch making pinctrl_force_default() and
     pinctrl_force_sleep() reprogram the states into the hardware of any
     hogged pins, even if they are already in the desired state.

     This only apply to hogged pins since groups of pins owned by
     drivers need to be managed by each driver, lest they could not do
     things like runtime PM and put pins to sleeping state even if the
     system as a whole is not in sleep.

  New drivers:

   - New driver for the Microsemi Ocelot SoC. This is used in ethernet
     switches.

   - The X-Powers AXP209 GPIO driver was extended to also deal with pin
     control and moved over from the GPIO subsystem. This circuit is a
     mixed-mode integrated circuit which is part of AllWinner designs.

   - New subdriver for the Qualcomm MSM8998 SoC, core of a high end
     mobile devices (phones) chipset.

   - New subdriver for the ST Microelectronics STM32MP157 MPU and
     STM32F769 MCU from the STM32 family.

   - New subdriver for the MediaTek MT7622 SoC. This is used for
     routers, repeater, gateways and such network infrastructure.

   - New subdriver for the NXP (former Freescale) i.MX 6ULL. This SoC
     has multimedia features and target "smart devices", I guess in-car
     entertainment, in-flight entertainment, industrial control panels
     etc.

  General improvements:

   - Incremental improvements on the SH-PFC subdrivers for things like
     the CAN bus.

   - Enable the glitch filter on Baytrail GPIOs used for interrupts.

   - Proper handling of pins to GPIO ranges on the Semtec SX150X

   - An IRQ setup ordering fix on MCP23S08.

   - A good set of janitorial coding style fixes"

* tag 'pinctrl-v4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (102 commits)
  pinctrl: mcp23s08: fix irq setup order
  pinctrl: Forward declare struct device
  pinctrl: sunxi: Use of_clk_get_parent_count() instead of open coding
  pinctrl: stm32: add STM32F769 MCU support
  pinctrl: sx150x: Add a static gpio/pinctrl pin range mapping
  pinctrl: sx150x: Register pinctrl before adding the gpiochip
  pinctrl: sx150x: Unregister the pinctrl on release
  pinctrl: ingenic: Remove redundant dev_err call in ingenic_pinctrl_probe()
  pinctrl: sprd: Use seq_putc() in sprd_pinconf_group_dbg_show()
  pinctrl: pinmux: Use seq_putc() in pinmux_pins_show()
  pinctrl: abx500: Use seq_putc() in abx500_gpio_dbg_show()
  pinctrl: mediatek: mt7622: align error handling of mtk_hw_get_value call
  pinctrl: mediatek: mt7622: fix potential uninitialized value being returned
  pinctrl: uniphier: refactor drive strength get/set functions
  pinctrl: imx7ulp: constify struct imx_cfg_params_decode
  pinctrl: imx: constify struct imx_pinctrl_soc_info
  pinctrl: imx7d: simplify imx7d_pinctrl_probe
  pinctrl: imx: use struct imx_pinctrl_soc_info as a const
  pinctrl: sunxi-pinctrl: fix pin funtion can not be match correctly.
  pinctrl: qcom: Add msm8998 pinctrl driver
  ...
 2018-02-02 14:22:53 -08:00
Linus Torvalds 9798f5178f The is the bulk of GPIO changes for the v4.16 kernel cycle. 
Core changes:
 
 - Disallow open drain and open source flags to be set
   simultaneously. This doesn't make electrical sense, and would
   the hardware actually respond to this setting, the result
   would be short circuit.
 
 - ACPI GPIO has a new core infrastructure for handling quirks.
   The quirks are there to deal with broken ACPI tables centrally
   instead of pushing the work to individual drivers. In the world
   of BIOS writers, the ACPI tables are perfect. Until they find a
   mistake in it. When such a mistake is found, we can patch it
   with a quirk. It should never happen, the problem is that it
   happens. So we accomodate for it.
 
 - Several documentation updates.
 
 - Revert the patch setting up initial direction state from
   reading the device. This was causing bad things for drivers
   that can't read status on all its pins. It is only affecting
   debugfs information quality.
 
 - Label descriptors with the device name if no explicit label is
   passed in.
 
 - Pave the ground for transitioning SPI and regulators to use
   GPIO descriptors by implementing some quirks in the device tree
   GPIO parsing code.
 
 New drivers:
 
 - New driver for the Access PCIe IDIO 24 family.
 
 Other:
 
 - Major refactorings and improvements to the GPIO mockup driver
   used for test and verification.
 
 - Moved the AXP209 driver over to pin control since it gained a
   pin control back-end. These patches will appear (with the same
   hashes) in the pin control pull request as well.
 
 - Convert the onewire GPIO driver w1-gpio to use descriptors.
   This is merged here since the W1 maintainers send very few
   pull requests and he ACKed it.
 
 - Start to clean up driver headers using <linux/gpio.h> to just
   use <linux/gpio/driver.h> as appropriate.
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Merge tag 'gpio-v4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "The is the bulk of GPIO changes for the v4.16 kernel cycle. It is
  pretty calm this time around I think. I even got time to get to things
  like starting to clean up header includes.

  Core changes:

   - Disallow open drain and open source flags to be set simultaneously.
     This doesn't make electrical sense, and would the hardware actually
     respond to this setting, the result would be short circuit.

   - ACPI GPIO has a new core infrastructure for handling quirks. The
     quirks are there to deal with broken ACPI tables centrally instead
     of pushing the work to individual drivers. In the world of BIOS
     writers, the ACPI tables are perfect. Until they find a mistake in
     it. When such a mistake is found, we can patch it with a quirk. It
     should never happen, the problem is that it happens. So we
     accomodate for it.

   - Several documentation updates.

   - Revert the patch setting up initial direction state from reading
     the device. This was causing bad things for drivers that can't read
     status on all its pins. It is only affecting debugfs information
     quality.

   - Label descriptors with the device name if no explicit label is
     passed in.

   - Pave the ground for transitioning SPI and regulators to use GPIO
     descriptors by implementing some quirks in the device tree GPIO
     parsing code.

  New drivers:

   - New driver for the Access PCIe IDIO 24 family.

  Other:

   - Major refactorings and improvements to the GPIO mockup driver used
     for test and verification.

   - Moved the AXP209 driver over to pin control since it gained a pin
     control back-end. These patches will appear (with the same hashes)
     in the pin control pull request as well.

   - Convert the onewire GPIO driver w1-gpio to use descriptors. This is
     merged here since the W1 maintainers send very few pull requests
     and he ACKed it.

   - Start to clean up driver headers using <linux/gpio.h> to just use
     <linux/gpio/driver.h> as appropriate"

* tag 'gpio-v4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (103 commits)
  gpio: Timestamp events in hardirq handler
  gpio: Fix kernel stack leak to userspace
  gpio: Fix a documentation spelling mistake
  gpio: Documentation update
  gpiolib: remove redundant initialization of pointer desc
  gpio: of: Fix NPE from OF flags
  gpio: stmpe: Delete an unnecessary variable initialisation in stmpe_gpio_probe()
  gpio: stmpe: Move an assignment in stmpe_gpio_probe()
  gpio: stmpe: Improve a size determination in stmpe_gpio_probe()
  gpio: stmpe: Use seq_putc() in stmpe_dbg_show()
  gpio: No NULL owner
  gpio: stmpe: i2c transfer are forbiden in atomic context
  gpio: davinci: Include proper header
  gpio: da905x: Include proper header
  gpio: cs5535: Include proper header
  gpio: crystalcove: Include proper header
  gpio: bt8xx: Include proper header
  gpio: bcm-kona: Include proper header
  gpio: arizona: Include proper header
  gpio: amd8111: Include proper header
  ...
 2018-01-31 12:25:27 -08:00
Linus Torvalds 168fe32a07 Merge branch 'misc.poll' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 
Pull poll annotations from Al Viro:
 "This introduces a __bitwise type for POLL### bitmap, and propagates
  the annotations through the tree. Most of that stuff is as simple as
  'make ->poll() instances return __poll_t and do the same to local
  variables used to hold the future return value'.

  Some of the obvious brainos found in process are fixed (e.g. POLLIN
  misspelled as POLL_IN). At that point the amount of sparse warnings is
  low and most of them are for genuine bugs - e.g. ->poll() instance
  deciding to return -EINVAL instead of a bitmap. I hadn't touched those
  in this series - it's large enough as it is.

  Another problem it has caught was eventpoll() ABI mess; select.c and
  eventpoll.c assumed that corresponding POLL### and EPOLL### were
  equal. That's true for some, but not all of them - EPOLL### are
  arch-independent, but POLL### are not.

  The last commit in this series separates userland POLL### values from
  the (now arch-independent) kernel-side ones, converting between them
  in the few places where they are copied to/from userland. AFAICS, this
  is the least disruptive fix preserving poll(2) ABI and making epoll()
  work on all architectures.

  As it is, it's simply broken on sparc - try to give it EPOLLWRNORM and
  it will trigger only on what would've triggered EPOLLWRBAND on other
  architectures. EPOLLWRBAND and EPOLLRDHUP, OTOH, are never triggered
  at all on sparc. With this patch they should work consistently on all
  architectures"

* 'misc.poll' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (37 commits)
  make kernel-side POLL... arch-independent
  eventpoll: no need to mask the result of epi_item_poll() again
  eventpoll: constify struct epoll_event pointers
  debugging printk in sg_poll() uses %x to print POLL... bitmap
  annotate poll(2) guts
  9p: untangle ->poll() mess
  ->si_band gets POLL... bitmap stored into a user-visible long field
  ring_buffer_poll_wait() return value used as return value of ->poll()
  the rest of drivers/*: annotate ->poll() instances
  media: annotate ->poll() instances
  fs: annotate ->poll() instances
  ipc, kernel, mm: annotate ->poll() instances
  net: annotate ->poll() instances
  apparmor: annotate ->poll() instances
  tomoyo: annotate ->poll() instances
  sound: annotate ->poll() instances
  acpi: annotate ->poll() instances
  crypto: annotate ->poll() instances
  block: annotate ->poll() instances
  x86: annotate ->poll() instances
  ...
 2018-01-30 17:58:07 -08:00
Linus Torvalds 1c1f395b28 sound updates for 4.16-rc1 
The major changes in the core API side in this cycle are the still
 on-going ASoC componentization works.  Other than that, only few small
 changes such as 20bit PCM format support are found.
 
 Meanwhile the rest majority of changes are for ASoC drivers:
 - Large cleanups of some of the TI CODEC drivers
 - Continued work on Intel ASoC stuff for new quirks, ACPI GPIO
   handling, Kconfigs and lots of cleanups
 - Refactoring of the Freescale SSI driver, as preliminary work for the
   upcoming changes
 - Work on ST DFSDM driver, including the required IIO patches
 - New drivers for Allwinner A83T, Maxim MAX89373, SocioNext UiniPhier
   EVEA Tempo Semiconductor TSCS42xx and TI PCM816x, TAS5722 and TAS6424
   devices
 - Removal of dead codes for SN95031 and board drivers
 
 Last but not least, a few HD-audio and USB-audio quirks are included
 as usual, too.
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Merge tag 'sound-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound updates from Takashi Iwai:
 "The major changes in the core API side in this cycle are the still
  on-going ASoC componentization works. Other than that, only few small
  changes such as 20bit PCM format support are found.

  Meanwhile the rest majority of changes are for ASoC drivers:

   - Large cleanups of some of the TI CODEC drivers

   - Continued work on Intel ASoC stuff for new quirks, ACPI GPIO
     handling, Kconfigs and lots of cleanups

   - Refactoring of the Freescale SSI driver, as preliminary work for
     the upcoming changes

   - Work on ST DFSDM driver, including the required IIO patches

   - New drivers for Allwinner A83T, Maxim MAX89373, SocioNext UiniPhier
     EVEA Tempo Semiconductor TSCS42xx and TI PCM816x, TAS5722 and
     TAS6424 devices

   - Removal of dead codes for SN95031 and board drivers

  Last but not least, a few HD-audio and USB-audio quirks are included
  as usual, too"

* tag 'sound-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (303 commits)
  ALSA: hda - Reduce the suspend time consumption for ALC256
  ASoC: use seq_file to dump the contents of dai_list,platform_list and codec_list
  ASoC: soc-core: add missing EXPORT_SYMBOL_GPL() for snd_soc_rtdcom_lookup
  IIO: ADC: stm32-dfsdm: remove unused variable again
  ASoC: bcm2835: fix hw_params error when device is in prepared state
  ASoC: mxs-sgtl5000: Do not print error on probe deferral
  ASoC: sgtl5000: Do not print error on probe deferral
  ASoC: Intel: remove select on non-existing SND_SOC_INTEL_COMMON
  ALSA: usb-audio: Support changing input on Sound Blaster E1
  ASoC: Intel: remove second duplicated assignment to pointer 'res'
  ALSA: hda/realtek - update ALC215 depop optimize
  ALSA: hda/realtek - Support headset mode for ALC215/ALC285/ALC289
  ALSA: pcm: Fix trailing semicolon
  ASoC: add Component level .read/.write
  ASoC: cx20442: fix regression by adding back .read/.write
  ASoC: uda1380: fix regression by adding back .read/.write
  ASoC: tlv320dac33: fix regression by adding back .read/.write
  ALSA: hda - Use IS_REACHABLE() for dependency on input
  IIO: ADC: stm32-dfsdm: fix static check warning
  IIO: ADC: stm32-dfsdm: code optimization
  ...
 2018-01-29 09:41:47 -08:00
Linus Walleij d58f2bf261 gpio: Timestamp events in hardirq handler 
Add a hardirq handler to the GPIO userspace event loop, making
sure to pick up the timestamp there, as close as possible in time
relative to the actual event causing the interrupt.

Tested with a simple pushbutton GPIO on ux500 and seems to work
fine.

Cc: Bartosz Golaszewski <brgl@bgdev.pl>
Reviewed-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Reported-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-23 14:43:57 +01:00
Linus Walleij 24bd3efc9d gpio: Fix kernel stack leak to userspace 
The GPIO event descriptor was leaking kernel stack to
userspace because we don't zero the variable before
use. Ooops. Fix this.

Cc: stable@vger.kernel.org
Reported-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Bartosz Golaszewski <brgl@bgdev.pl>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-23 14:43:45 +01:00
Linus Walleij c4a2fed32f Merge branch 'gpio-drivers-only-driver-h' into devel 2018-01-19 07:43:37 +01:00
Mark Brown b68cbc1d1d
Merge remote-tracking branch 'asoc/topic/intel' into asoc-next 2018-01-18 11:55:32 +00:00
Colin Ian King 40a3c9db08 gpiolib: remove redundant initialization of pointer desc 
The initialized value stored in pointer desc is never read as it
is updated in the first executable statement in the function.
This is therefore redundant and can be removed.

Cleans up clang warning:
drivers/gpio/gpiolib.c:3710:20: warning: Value stored to 'desc'
during its initialization is never read

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-17 07:44:16 +01:00
Linus Walleij 605f2d34ea gpio: of: Fix NPE from OF flags 
Some calls to of_get_named_gpio() calls sets the flags
argument to NULL because they are not interested in the
flags. This caused a null pointer exception since we were
unconditionally using these flags. Fix it.

Fixes: 6a537d4846 ("gpio: of: Support regulator nonstandard GPIO properties")
Cc: Heiner Kallweit <hkallweit1@gmail.com>
Reported-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-17 07:44:16 +01:00
Markus Elfring 0f7192318b gpio: stmpe: Delete an unnecessary variable initialisation in stmpe_gpio_probe() 
The local variable "irq" will eventually be set to an appropriate value
a bit later. Thus omit the explicit initialisation at the beginning.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-17 07:44:16 +01:00
Markus Elfring 757ad058da gpio: stmpe: Move an assignment in stmpe_gpio_probe() 
Move the assignment for the local variable "irq" so that its setting
will only be performed directly before it is checked by this function.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-17 07:44:15 +01:00
Markus Elfring 64fec0bcea gpio: stmpe: Improve a size determination in stmpe_gpio_probe() 
Replace the specification of a data structure by a pointer dereference
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-17 07:44:15 +01:00
Markus Elfring 0d83a5eb65 gpio: stmpe: Use seq_putc() in stmpe_dbg_show() 
A single character (line break) should be put into a sequence.
Thus use the corresponding function "seq_putc".

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-17 07:44:15 +01:00
Linus Walleij 7d18f0a14a gpio: No NULL owner 
Sometimes a GPIO is fetched with NULL as parent device, and
that is just fine. So under these circumstances, avoid using
dev_name() to provide a name for the GPIO line.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-17 07:44:14 +01:00
Patrice Chotard b888fb6f2a gpio: stmpe: i2c transfer are forbiden in atomic context 
Move the workaround from stmpe_gpio_irq_unmask() which is executed
in atomic context to stmpe_gpio_irq_sync_unlock() which is not.

It fixes the following issue:

[    1.500000] BUG: scheduling while atomic: swapper/1/0x00000002
[    1.500000] CPU: 0 PID: 1 Comm: swapper Not tainted 4.15.0-rc2-00020-gbd4301f-dirty #28
[    1.520000] Hardware name: STM32 (Device Tree Support)
[    1.520000] [<0000bfc9>] (unwind_backtrace) from [<0000b347>] (show_stack+0xb/0xc)
[    1.530000] [<0000b347>] (show_stack) from [<0001fc49>] (__schedule_bug+0x39/0x58)
[    1.530000] [<0001fc49>] (__schedule_bug) from [<00168211>] (__schedule+0x23/0x2b2)
[    1.550000] [<00168211>] (__schedule) from [<001684f7>] (schedule+0x57/0x64)
[    1.550000] [<001684f7>] (schedule) from [<0016a513>] (schedule_timeout+0x137/0x164)
[    1.550000] [<0016a513>] (schedule_timeout) from [<00168b91>] (wait_for_common+0x8d/0xfc)
[    1.570000] [<00168b91>] (wait_for_common) from [<00139753>] (stm32f4_i2c_xfer+0xe9/0xfe)
[    1.580000] [<00139753>] (stm32f4_i2c_xfer) from [<00138545>] (__i2c_transfer+0x111/0x148)
[    1.590000] [<00138545>] (__i2c_transfer) from [<001385cf>] (i2c_transfer+0x53/0x70)
[    1.590000] [<001385cf>] (i2c_transfer) from [<001388a5>] (i2c_smbus_xfer+0x12f/0x36e)
[    1.600000] [<001388a5>] (i2c_smbus_xfer) from [<00138b49>] (i2c_smbus_read_byte_data+0x1f/0x2a)
[    1.610000] [<00138b49>] (i2c_smbus_read_byte_data) from [<00124fdd>] (__stmpe_reg_read+0xd/0x24)
[    1.620000] [<00124fdd>] (__stmpe_reg_read) from [<001252b3>] (stmpe_reg_read+0x19/0x24)
[    1.630000] [<001252b3>] (stmpe_reg_read) from [<0002c4d1>] (unmask_irq+0x17/0x22)
[    1.640000] [<0002c4d1>] (unmask_irq) from [<0002c57f>] (irq_startup+0x6f/0x78)
[    1.650000] [<0002c57f>] (irq_startup) from [<0002b7a1>] (__setup_irq+0x319/0x47c)
[    1.650000] [<0002b7a1>] (__setup_irq) from [<0002bad3>] (request_threaded_irq+0x6b/0xe8)
[    1.660000] [<0002bad3>] (request_threaded_irq) from [<0002d0b9>] (devm_request_threaded_irq+0x3b/0x6a)
[    1.670000] [<0002d0b9>] (devm_request_threaded_irq) from [<001446e7>] (mmc_gpiod_request_cd_irq+0x49/0x8a)
[    1.680000] [<001446e7>] (mmc_gpiod_request_cd_irq) from [<0013d45d>] (mmc_start_host+0x49/0x60)
[    1.690000] [<0013d45d>] (mmc_start_host) from [<0013e40b>] (mmc_add_host+0x3b/0x54)
[    1.700000] [<0013e40b>] (mmc_add_host) from [<00148119>] (mmci_probe+0x4d1/0x60c)
[    1.710000] [<00148119>] (mmci_probe) from [<000f903b>] (amba_probe+0x7b/0xbe)
[    1.720000] [<000f903b>] (amba_probe) from [<001170e5>] (driver_probe_device+0x169/0x1f8)
[    1.730000] [<001170e5>] (driver_probe_device) from [<001171b7>] (__driver_attach+0x43/0x5c)
[    1.740000] [<001171b7>] (__driver_attach) from [<0011618d>] (bus_for_each_dev+0x3d/0x46)
[    1.740000] [<0011618d>] (bus_for_each_dev) from [<001165cd>] (bus_add_driver+0xcd/0x124)
[    1.740000] [<001165cd>] (bus_add_driver) from [<00117713>] (driver_register+0x4d/0x7a)
[    1.760000] [<00117713>] (driver_register) from [<001fc765>] (do_one_initcall+0xbd/0xe8)
[    1.770000] [<001fc765>] (do_one_initcall) from [<001fc88b>] (kernel_init_freeable+0xfb/0x134)
[    1.780000] [<001fc88b>] (kernel_init_freeable) from [<00167ee3>] (kernel_init+0x7/0x9c)
[    1.790000] [<00167ee3>] (kernel_init) from [<00009b65>] (ret_from_fork+0x11/0x2c)

Cc: stable@vger.kernel.org
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-17 07:44:14 +01:00
Linus Walleij 07c7b6a525 gpio: mmio: Also read bits that are zero 
The code for .get_multiple() has bugs:

1. The simple .get_multiple() just reads a register, masks it
and sets the return value. This is not correct: we only want to
assign values (whether 0 or 1) to the bits that are set in the
mask. Fix this by using &= ~mask to clear all bits in the mask
and then |= val & mask to set the corresponding bits from the
read.

2. The bgpio_get_multiple_be() call has a similar problem: it
uses the |= operator to set the bits, so only the bits in the
mask are affected, but it misses to clear all returned bits
from the mask initially, so some bits will be returned
erroneously set to 1.

3. The bgpio_get_set_multiple() again fails to clear the bits
from the mask.

4. find_next_bit() wasn't handled correctly, use a totally
different approach for one function and change the other
function to follow the design pattern of assigning the first
bit to -1, then use bit + 1 in the for loop and < num_iterations
as break condition.

Fixes: 80057cb417 ("gpio-mmio: Use the new .get_multiple() callback")
Cc: Bartosz Golaszewski <brgl@bgdev.pl>
Reported-by: Clemens Gruber <clemens.gruber@pqgruber.com>
Tested-by: Clemens Gruber <clemens.gruber@pqgruber.com>
Reported-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-16 23:42:36 +01:00
Linus Walleij 7220c43a4e gpio: davinci: Include proper header 
This driver has no business including <linux/gpio.h>, it is a
driver so include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-14 02:05:38 +01:00
Linus Walleij 45e8bd9cdc gpio: da905x: Include proper header 
These drivers has no business including <linux/gpio.h>, they
are drivers so include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-14 02:00:10 +01:00
Linus Walleij 326a2926c9 gpio: cs5535: Include proper header 
This driver has no business including <linux/gpio.h>, it is a
driver so include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-14 01:56:24 +01:00
Linus Walleij 6ba40f875d gpio: crystalcove: Include proper header 
This driver has no business including <linux/gpio.h>, it is a
driver so include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-14 01:48:48 +01:00
Linus Walleij e88a2ae2be gpio: bt8xx: Include proper header 
This driver has no business including <linux/gpio.h>, it is a
driver so include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-13 22:56:52 +01:00
Linus Walleij 14ec018e15 gpio: bcm-kona: Include proper header 
This driver has no business including <linux/gpio.h>, it is a
driver so include <linux/gpio/driver.h>.

GPIOF_DIR_IN/GPIOF_DIR_OUT are for consumers and should not be
used in drivers to use just 1/0 instead.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-13 22:54:05 +01:00
Linus Walleij 2e21ec4c40 gpio: arizona: Include proper header 
This driver has no business including <linux/gpio.h>, it is a
driver so include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-13 22:47:48 +01:00
Linus Walleij 3708c665a7 gpio: amd8111: Include proper header 
This driver has no business including <linux/gpio.h>, it is a
driver so include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-13 22:22:49 +01:00
Linus Walleij 40a1f9b207 gpio: altera: Include GPIO driver header 
This is a GPIO driver so it should definately include
<linux/gpio/driver.h>. We want to get rid of <linux/of_gpio.h>
but that will take a bit longer.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-13 22:18:34 +01:00
Linus Walleij d543668a61 gpio: adp5588: Include proper header 
This driver has no business including <linux/gpio.h>, it is a
driver so include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-13 22:14:56 +01:00
Linus Walleij 8a3b4f20d9 gpio: adp5520: Include proper header 
This driver has no business including <linux/gpio.h>, it is a
driver so include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-13 22:12:07 +01:00
Linus Walleij 91f6a4afd1 gpio: 74x174: Include proper headers 
This driver has no business including <linux/gpio.h> or
<linux/of_gpio.h>. Cut them and include <linux/gpio/driver.h>
and <linux/gpio/consumer.h> which is it they really needs.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-13 22:07:09 +01:00
Linus Walleij a603a2b8d8 gpio: of: Add special quirk to parse regulator flags 
While most GPIOs are indicated to be active low or open drain using
their twocell flags, we have legacy regulator bindings to take into
account.

Add a quirk respecting the special boolean active-high and open
drain flags when parsing regulator nodes for GPIOs.

This makes it possible to get rid of duplicated inversion semantics
handling in the regulator core and any regulator drivers parsing
and handling this separately.

Unfortunately the old regulator inversion semantics are specified
such that the presence or absence of "enable-active-high" solely
controls the semantics, so we cannot deprecate this in favor
of the phandle-provided inversion flag, instead any such phandle
inversion flag provided in the second cell of a GPIO handle must be
actively ignored, so we print a warning to contain the situation
and make things easy for the users.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-12 11:05:24 +01:00
Linus Walleij 92542edc42 gpio: Export devm_gpiod_get_from_of_node() for consumers 
We have been holding back on adding an API for fetching GPIO handles
directly from device nodes, strongly preferring to get it from the
spawn devices instead.

The fwnode interface however already contains an API for doing this,
as it is used for opaque device tree nodes or ACPI nodes for getting
handles to LEDs and keys that use GPIO: those are specified as one
child per LED/key in the device tree and are not individual devices.

However regulators present a special problem as they already have
helper functions to traverse the device tree from a regulator node
and two levels down to fill in data, and as it already traverses
GPIO nodes in its own way, and already holds a pointer to each
regulators device tree node, it makes most sense to export an
API to fetch the GPIO descriptor directly from the node.

We only support the devm_* version for now, hopefully no non-devres
version will be needed.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-12 11:05:24 +01:00
Linus Walleij 6392cca42d gpio: Break out code to get a descriptor from a DT node 
Sometimes a GPIO needs to be taken from a node without
a device associated with it. The fwnode accessor does this,
let's however break out the DT code for now.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-12 11:05:18 +01:00
Linus Walleij 6a537d4846 gpio: of: Support regulator nonstandard GPIO properties 
Before it was clearly established that all GPIO properties in the
device tree shall be named "foo-gpios" (with the deprecated variant
"foo-gpio" for single lines) we unfortunately merged a few bindings
for regulators with random phandle names.

As we want to switch the GPIO regulator driver to using descriptors,
we need devm_gpiod_get() to return something reasonable when looking
up these in the device tree.

Put in a special #ifdef:ed kludge to do this special lookup only
for the regulator case and gets compiled out if we're not enabling
regulators. Supply a whitelist with properties we accept.

Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-12 10:04:57 +01:00
Wei Yongjun 76e28f5ffe gpio: thunderx: fix error return code in thunderx_gpio_probe() 
Fix to return error code -ENOMEM from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 5a2a30024d ("gpio: Add gpio driver support for ThunderX and OCTEON-TX")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: David Daney <david.daney@cavium.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-11 10:49:32 +01:00
Arnd Bergmann 92a8046c9d gpio: winbond: fix ISA_BUS_API dependency 
The newly added GPIO driver for winbond chipsets causes a
circular dependency warning in Kconfig:

drivers/gpio/Kconfig:13:error: recursive dependency detected!
drivers/gpio/Kconfig:13:	symbol GPIOLIB is selected by STX104
drivers/iio/adc/Kconfig:699:	symbol STX104 depends on ISA_BUS_API
arch/Kconfig:830:	symbol ISA_BUS_API is selected by GPIO_WINBOND
drivers/gpio/Kconfig:701:	symbol GPIO_WINBOND depends on GPIOLIB

The underlying problem is that ISA_BUS_API is not meant to be selected by
device drivers, instead it is provided by the architectures that support
ISA add-on card devices, or in case of x86 have this explicitly enabled.

This particular driver appears to be different from the other ISA_BUS_API
based drivers, in that it is not normally an add-on card (ISA or PC104)
but instead is an LPC-attached component on the mainboard. We already
support other functionality provided by this chip, at least
drivers/watchdog/w83627hf_wdt.c and drivers/hwmon/w83627ehf.c, plus
there is a discovery function for this hardware in
drivers/parport/parport_pc.c.

If we want to use this driver without having to enable CONFIG_EXPERT,
it might be better to not use the isa_bus_type for it, but rather
turn it into a platform_driver, acpi_driver or add an MFD for it that
is shared with the wdt and hwmon portions and does the probing.

For now, this patch fixes the dependency by changing 'select' into
'depends on'.

Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Fixes: a0d6500941 ("gpio: winbond: Add driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-11 10:17:32 +01:00
William Breathitt Gray 5855620466 gpio: Add GPIO support for the ACCES PCIe-IDIO-24 family 
The ACCES PCIe-IDIO-24 device provides 56 lines of digital I/O (24 lines
of optically-isolated non-polarized digital inputs for AC and DC control
signals, 24 lines of isolated solid state FET digital outputs, and 8
non-isolated TTL/CMOS compatible programmable I/O). An interrupt is
generated when any of the inputs change state (low to high or high to
low).

Input filter control is not supported by this driver, and input filters
are deactivated by this driver. These devices are capable of
get_multiple and set_multiple functionality, but these functions have
not yet been implemented for this driver. Change-Of-State (COS)
detection functionality may be configured to fire interrupts on
exclusively rising/falling edges, but this driver currently only
implements COS detection for either both edges or none.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-10 14:39:28 +01:00
Stephen Boyd 64ff2c8e46 gpiolib: Export gpiochip_irqchip_irq_valid() to drivers 
Some pinctrl drivers can use the gpiochip irq valid information
to figure out if certain gpios are exposed to the kernel for
usage or not. Expose this API so we can use it in the
pinmux_ops::request ops.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-10 14:21:25 +01:00
Geert Uytterhoeven 1e77fc8211 gpio: Add missing open drain/source handling to gpiod_set_value_cansleep() 
Since commit f11a04464a ("i2c: gpio: Enable working over slow
can_sleep GPIOs"), probing the i2c RTC connected to an i2c-gpio bus on
r8a7740/armadillo fails with:

    rtc-s35390a 0-0030: error resetting chip
    rtc-s35390a: probe of 0-0030 failed with error -5

More debug code reveals:

    i2c i2c-0: master_xfer[0] R, addr=0x30, len=1
    i2c i2c-0: NAK from device addr 0x30 msg #0
    s35390a_get_reg: ret = -6

Commit 02e479808b ("gpio: Alter semantics of *raw* operations to
actually be raw") moved open drain/source handling from
gpiod_set_raw_value_commit() to gpiod_set_value(), but forgot to take
into account that gpiod_set_value_cansleep() also needs this handling.
The i2c protocol mandates that i2c signals are open drain, hence i2c
communication fails.

Fix this by adding the missing handling to gpiod_set_value_cansleep(),
using a new common helper gpiod_set_value_nocheck().

Fixes: 02e479808b ("gpio: Alter semantics of *raw* operations to actually be raw")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
[removed underscore syntax, added kerneldoc]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-10 14:17:17 +01:00
Andy Shevchenko dd1dbf94d2 gpio: merrifield: Add support of ACPI enabled platforms 
The driver needs the pin control device name for ACPI.

We are looking through ACPI namespace and return first found device
based on ACPI HID for Intel Merrifield FLIS (pin control device).

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2018-01-10 00:43:42 +01:00
Wolfram Sang 94fc73094a gpio: correct docs about return value of gpiod_get_direction 
The use of the GPIOF_* flags is deprecated, so don't advertise them
here. Document the plain numbers for now until we have a better
solution.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-09 15:35:25 +01:00
Maciej S. Szmigiero a0d6500941 gpio: winbond: Add driver 
This commit adds GPIO driver for Winbond Super I/Os.

Currently, only W83627UHG model (also known as Nuvoton NCT6627UD)
is supported but in the future a support for other Winbond models,
too, can be added to the driver.

A module parameter "gpios" sets a bitmask of GPIO ports to enable
(bit 0 is GPIO1, bit 1 is GPIO2, etc.).

One should be careful which ports one tinkers with since some
might be managed by the firmware (for functions like powering on and
off, sleeping, BIOS recovery, etc.) and some of GPIO port pins are
physically shared with other devices included in the Super I/O chip.

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-09 14:51:00 +01:00
Linus Walleij c858233902 gpio: of: Support SPI nonstandard GPIO properties 
Before it was clearly established that all GPIO properties in the
device tree shall be named "foo-gpios" (with the deprecated variant
"foo-gpio" for single lines) we unfortunately merged a few bindings
which named the lines "gpio-foo" instead.

This is most prominent in the GPIO SPI driver in Linux which names
the lines "gpio-sck", "gpio-mosi" and "gpio-miso".

As we want to switch the GPIO SPI driver to using descriptors, we
need devm_gpiod_get() to return something reasonable when looking
up these in the device tree.

Put in a special #ifdef:ed kludge to do this special lookup only
for the SPI case and gets compiled out if we're not enabling SPI.
If we have more oddly defined legacy GPIOs like this, they can be
handled in a similar manner.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-08 17:29:25 +01:00
Linus Walleij 24e78079bf gpio: label descriptors using the device name 
Some GPIO lines appear named "?" in the lsgpio dump due to their
requesting drivers not passing a reasonable label.

Most typically this happens if a device tree node just defines
gpios = <...> and not foo-gpios = <...>, the former gets named
"foo" and the latter gets named "?".

However the struct device passed in is always valid so let's
just label the GPIO with dev_name() on the device if no proper
label was passed.

Cc: Reported-by: Jason Kridner <jkridner@beagleboard.org>
Reported-by: Jason Kridner <jkridner@beagleboard.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-05 09:25:42 +01:00
Linus Walleij 088413bc0b gpio: omap: Give unique labels to each GPIO bank/chip 
As we need to add GPIO lookup tables to the OMAP platforms, we
need to reference each GPIO chip with a unique label. Use the GPIO
base to name each chip, "gpio-0-31", "gpio-32-63" etc.

Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Santosh Shilimkar <ssantosh@kernel.org>
Cc: Kevin Hilman <khilman@kernel.org>
Cc: linux-omap@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-03 08:46:08 +01:00
Vladimir Zapolskiy 156dd39219 gpiolib: add desc validation to gpiod_set_transitory() 
The gpiod_set_transitory() function is publicly exported, and
it is expected from it to be ready for usage with optional GPIOs
on consumer's side.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-02 09:39:17 +01:00
Vladimir Zapolskiy dd3b9a4408 gpiolib: remove a redundant check in gpiod_to_chip() 
This non-functional change slightly simplifies the implementation
of gpiod_to_chip() function.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-02 09:33:07 +01:00
Vladimir Zapolskiy 30322bcf82 gpiolib: don't dereference a desc before validation 
The fix restores a proper validation of an input gpio desc, which
might be needed to deal with optional GPIOs correctly.

Fixes: 02e479808b ("gpio: Alter semantics of *raw* operations to actually be raw")
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2018-01-02 09:31:20 +01:00
Thomas Gleixner 702cb0a028 genirq/irqdomain: Rename early argument of irq_domain_activate_irq() 
The 'early' argument of irq_domain_activate_irq() is actually used to
denote reservation mode. To avoid confusion, rename it before abuse
happens.

No functional change.

Fixes: 7249164346 ("genirq/irqdomain: Update irq_domain_ops.activate() signature")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Alexandru Chirvasitu <achirvasub@gmail.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Dou Liyang <douly.fnst@cn.fujitsu.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: Mikael Pettersson <mikpelinux@gmail.com>
Cc: Josh Poulson <jopoulso@microsoft.com>
Cc: Mihai Costache <v-micos@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-pci@vger.kernel.org
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Dexuan Cui <decui@microsoft.com>
Cc: Simon Xiao <sixiao@microsoft.com>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Cc: Jork Loeser <Jork.Loeser@microsoft.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: devel@linuxdriverproject.org
Cc: KY Srinivasan <kys@microsoft.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Sakari Ailus <sakari.ailus@intel.com>,
Cc: linux-media@vger.kernel.org
 2017-12-29 21:13:04 +01:00
Thomas Gleixner 8880c13734 gpio: brcmstb: Make really use of the new lockdep class 
The recent extension of irq_set_lockdep_class() with a second argument
added the new lockdep class to the mrcmstb driver, but used the already
existing lockdep class as second argument, which leaves the new lockdep
class defined but unused.

Use the new lockdep class as that's what the change intended to do.

Fixes: 39c3fd5895 ("kernel/irq: Extend lockdep class for request mutex")
Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: linus.walleij@linaro.org
 2017-12-29 16:37:09 +01:00
Vasyl Gomonovych fe13862c9c gpio: fix aspeed_gpio_banks array size check 
The test should be >= ARRAY_SIZE() instead of > ARRAY_SIZE().

Signed-off-by: Vasyl Gomonovych <gomonovych@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-28 13:53:06 +01:00
Andrew Lunn 39c3fd5895 kernel/irq: Extend lockdep class for request mutex 
The IRQ code already has support for lockdep class for the lock mutex
in an interrupt descriptor. Extend this to add a second class for the
request mutex in the descriptor. Not having a class is resulting in
false positive splats in some code paths.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: linus.walleij@linaro.org
Cc: grygorii.strashko@ti.com
Cc: f.fainelli@gmail.com
Link: https://lkml.kernel.org/r/1512234664-21555-1-git-send-email-andrew@lunn.ch
 2017-12-28 12:26:35 +01:00
Christophe Leroy 8227033547 gpio: fix "gpio-line-names" property retrieval 
Following commit 9427ecbed4 ("gpio: Rework of_gpiochip_set_names()
to use device property accessors"), "gpio-line-names" DT property is
not retrieved anymore when chip->parent is not set by the driver.
This is due to OF based property reads having been replaced by device
based property reads.

This patch fixes that by making use of
fwnode_property_read_string_array() instead of
device_property_read_string_array() and handing over either
of_fwnode_handle(chip->of_node) or dev_fwnode(chip->parent)
to that function.

Fixes: 9427ecbed4 ("gpio: Rework of_gpiochip_set_names() to use device property accessors")
Cc: stable@vger.kernel.org
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-22 15:24:31 +01:00
Grygorii Strashko 8bb65fc06c gpio: gpio-reg: fix build 
Revert changes introduced by commit f0fbe7bce7 ("gpio: Move irqdomain
into struct gpio_irq_chip") as they are not aplicable to this driver.

Reported-by: Russell King - ARM Linux <linux@armlinux.org.uk>
Fixes: f0fbe7bce7 ("gpio: Move irqdomain into struct gpio_irq_chip")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-22 15:24:31 +01:00
Jonathan Neuschäfer 689fd02e81 gpiolib: Fix typo in comment ("piochip_add_data") 
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-21 23:55:16 +01:00
Rasmus Villemoes a746a23218 gpio: reduce descriptor validation code size 
While we do need macros to be able to return from the "calling"
function, we can still factor the checks done by the VALIDATE_DESC*
macros into a real helper function. This reduces the backslashtitis,
avoids duplicating the logic in the two macros and saves about 1K of
generated code:

$ scripts/bloat-o-meter drivers/gpio/gpiolib.o.{0,1}
add/remove: 1/0 grow/shrink: 0/15 up/down: 104/-1281 (-1177)
Function                                     old     new   delta
validate_desc                                  -     104    +104
gpiod_set_value                              192     135     -57
gpiod_set_raw_value                          125      67     -58
gpiod_direction_output                       412     351     -61
gpiod_set_value_cansleep                     150      70     -80
gpiod_set_raw_value_cansleep                 132      52     -80
gpiod_get_raw_value                          139      54     -85
gpiod_set_debounce                           226     140     -86
gpiod_direction_output_raw                   124      38     -86
gpiod_get_value                              161      74     -87
gpiod_cansleep                               126      39     -87
gpiod_get_raw_value_cansleep                 130      39     -91
gpiod_get_value_cansleep                     152      59     -93
gpiod_is_active_low                          128      33     -95
gpiod_request                                299     184    -115
gpiod_direction_input                        386     266    -120
Total: Before=25460, After=24283, chg -4.62%

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-21 23:09:51 +01:00
Timur Tabi 1ca2a92b2a Revert "gpio: set up initial state from .get_direction()" 
This reverts commit 72d3200061.

We cannot blindly query the direction of all GPIOs when the pins are
first registered.  The get_direction callback normally triggers a
read/write to hardware, but we shouldn't be touching the hardware for
an individual GPIO until after it's been properly claimed.

Signed-off-by: Timur Tabi <timur@codeaurora.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-21 13:03:41 +01:00
Pravin Shedge 76bc7f1876 drivers: gpio: remove duplicate includes 
These duplicate includes have been found with scripts/checkincludes.pl
but they have been removed manually to avoid removing false positives.

Signed-off-by: Pravin Shedge <pravin.shedge4linux@gmail.com>
Acked-by: Gregory Fong <gregory.0xf0@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-20 13:08:10 +01:00
Christophe Leroy 1efba35afa gpio: sysfs: avoid using kstrtol() in 'value' attribute write 
A 'perf record' on an app continuously writing in the 'value'
attribute show that most of the time is spent in kstrtol()

--17.99%--value_store
          |
          |--10.17%--kstrtoint
          |          |
          |          |--8.82%--kstrtoll
          |
          |--2.50%--gpiod_set_value_cansleep
          |
          |--1.82%--u16_gpio_set
          |
          |--1.46%--value_store

The normal case is to write 0 or 1 in the attribute, therefore
this patch avoids the call to kstrtol() in the most common cases

Then 'perf record' shows

--7.21%--value_store
          |
          |--2.69%--u16_gpio_set
          |
          |--1.47%--value_store
          |
          |--1.08%--gpiod_set_value_cansleep
          |
          |--0.60%--mutex_lock
          |
           --0.58%--mutex_unlock

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-20 10:34:58 +01:00
Christophe Leroy 7a94b88cb7 gpio: sysfs: don't use sprintf() for 'value' attribute 
A bench with 'perf record' shows that most of time spent in value_show()
is spent in sprintf()

--42.41%--sysfs_kf_read
          |
          |--39.73%--dev_attr_show
          |          |
          |          |--38.23%--value_show
          |          |          |
          |          |          |--29.22%--sprintf
          |          |          |
          |          |          |--2.94%--gpiod_get_value_cansleep
          |          |          |

value_show() only returns "0\n" or "1\n", therefore the use of
sprintf() can be avoided

With this patch we get the following result with 'perf record'

--13.89%--sysfs_kf_read
          |
          |--10.72%--dev_attr_show
          |          |
          |          |--9.44%--value_show
          |          |          |
          |          |          |--4.61%--gpiod_get_value_cansleep

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-20 10:34:01 +01:00
Christophe Leroy 9295c01253 gpio: sysfs: correct error handling on 'value' attribute read. 
'value' attribute is supposed to only return 0 or 1 according to
the documentation.
With today's implementation, if gpiod_get_value_cansleep() fails
the printed 'value' is a negative value.

This patch ensures that an error is returned on read instead.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-20 10:33:21 +01:00
Christophe Leroy 7fda9100bb gpio: sysfs: change 'value' attribute to prealloc 
The GPIO 'value' attribute is time critical. A small bench with
'perf record' on the app below shows that 80% of the time spent in
sysfs_kf_seq_show() is spent in memset() for zeroising the buffer.

|--67.48%--sysfs_kf_seq_show
|          |
|          |--54.40%--memset
|          |
|          |--11.49%--dev_attr_show
|          |          |
|          |          |--10.06%--value_show
|          |          |          |
|          |          |          |--4.75%--sprintf
|          |          |          |          |

This patch changes the attribute type to prealloc, eliminating the
need to zeroise the buffer at each read. 'perf record' gives the
following result.

|--42.41%--sysfs_kf_read
|          |
|          |--39.73%--dev_attr_show
|          |          |
|          |          |--38.23%--value_show
|          |          |          |
|          |          |          |--29.22%--sprintf
|          |          |          |          |

Test done with the following small app:

int main(int argc, char **argv)
{
	int fd = open(argv[1], O_RDONLY);

	for (;;) {
		int buf[512];

		read(fd, buf, 512);
		lseek(fd, 0, SEEK_SET);
	}
	exit(0);
}

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-20 10:28:05 +01:00
Bartosz Golaszewski fcf273e580 gpiolib: use kstrdup_const() for gpio_device label 
Users often pass a pointer to a static string to gpiochip_add_data()
family of functions. Avoid unnecessary memory allocations with the
provided helper routine.

While at it: use a ternary operator instead of an if else for brevity.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-20 09:16:39 +01:00
Bartosz Golaszewski 3b469b0a13 gpiolib: constify label in gpio_device 
This string is never modified. Make it const.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-20 09:01:50 +01:00
Bartosz Golaszewski c4b54e138a gpio: mockup: fix a return value check 
The return value of platform_device_register_resndata() on error is
an error code converted to pointer with ERR_PTR(), not NULL.

Check the return value correctly.

Fixes: 8a39f597bc ("gpio: mockup: rework device probing")
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-08 15:34:15 +01:00
Linus Walleij c6e40f9639 Merge branch 'ib-move-axp209' of /home/linus/linux-gpio into devel 2017-12-07 10:10:24 +01:00
Linus Walleij 110e2a38c8 Merge branch 'ib-move-axp209' into devel 2017-12-07 10:09:55 +01:00
Quentin Schulz 449317a8b4 pinctrl: move gpio-axp209 to pinctrl 
To prepare the driver for the upcoming pinctrl features, move the GPIO
driver AXP209 from GPIO to pinctrl subsystem.

Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-07 10:05:30 +01:00
Quentin Schulz 3cac991e33 gpio: axp209: switch unsigned variables to unsigned int 
Checkpatch complains with the following message:
WARNING: Prefer 'unsigned int' to bare use of 'unsigned'

Let's make it happy by switching over to unsigned int.

Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-07 10:04:09 +01:00
Arvind Yadav 4070a53496 gpio: ftgpio010: Fix platform_get_irq's error checking 
The platform_get_irq() function returns negative if an error occurs.
zero or positive number on success. platform_get_irq() error checking
for zero is not correct.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:35 +01:00
Andrew Jeffery 1b43d26985 gpio: aspeed: Add support for reset tolerance 
Use the new pinconf parameter for state persistence to expose the
associated capability of the Aspeed GPIO controller.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:34 +01:00
Andrew Jeffery e10f72bf4b gpio: gpiolib: Generalise state persistence beyond sleep 
General support for state persistence is added to gpiolib with the
introduction of a new pinconf parameter to propagate the request to
hardware. The existing persistence support for sleep is adapted to
include hardware support if the GPIO driver provides it. Persistence
continues to be enabled by default; in-kernel consumers can opt out, but
userspace (currently) does not have a choice.

The *_SLEEP_MAY_LOSE_VALUE and *_SLEEP_MAINTAIN_VALUE symbols are
renamed, dropping the SLEEP prefix to reflect that the concept is no
longer sleep-specific.  I feel that renaming to just *_MAY_LOSE_VALUE
could initially be misinterpreted, so I've further changed the symbols
to *_TRANSITORY and *_PERSISTENT to address this.

The sysfs interface is modified only to keep consistency with the
chardev interface in enforcing persistence for userspace exports.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:34 +01:00
Colin Ian King e2843cb6cd gpio: gpio-stmpe: make various char arrays static const, shrinks object size 
Don't populate the read-only arrays edge_det_values, rise_values and
fall_values on the stack but instead make them static and constify them.
Makes the object code smaller by over 240 bytes:

Before:
   text	   data	    bss	    dec	    hex	filename
   9525	   2520	    192	  12237	   2fcd	drivers/gpio/gpio-stmpe.o

After:
   text	   data	    bss	    dec	    hex	filename
   9025	   2776	    192	  11993	   2ed9	drivers/gpio/gpio-stmpe.o

(gcc version 7.2.0 x86_64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:33 +01:00
Adam Borowski deb2e713ba gpio: it87: fix mojibake in module metadata 
It had twice-encoded Unicode.

Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:32 +01:00
Bartosz Golaszewski cd9835f1c6 gpio: mockup: add helpers for accessing the gpio ranges 
In order to avoid repeating the calculations on every access - add
helpers for gpio base and ngpio components of the ranges array.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:31 +01:00
Bartosz Golaszewski e63a006f70 gpio: mockup: rename gpio_mockup_params_nr to gpio_mockup_num_ranges 
This variable holds the number of mockup GPIO ranges so rename it
accordingly.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:31 +01:00
Bartosz Golaszewski 1e0dca677b gpio: mockup: modify the return value check for devm_irq_sim_init() 
As discussed with Marc Zyngier: irq_sim_init() and its devres variant
should return the base of the allocated interrupt range on success
rather than 0. This will be modified later - first, change the way
users handle the return value of these routines.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:30 +01:00
Bartosz Golaszewski c47bee95f6 gpio: mockup: implement gpio_mockup_set_multiple() 
Implement the set_multiple() callback and register it with the gpiolib
framework. This is only meant to also test the internal kernel API.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:30 +01:00
Bartosz Golaszewski 2a9d742c26 gpio: mockup: tweak line breaks 
Minor readability tweak: prefer breaking the lines in a way where the
second part is longer than the first.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:29 +01:00
Bartosz Golaszewski fa86963a75 gpio: mockup: verify that ngpio > 0 
Improve the module params sanitization: bail out from init if the user
tries to pass a non-positive number of GPIO lines for any mockup chip.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:28 +01:00
Bartosz Golaszewski 46526c15ca gpio: mockup: fix debugfs handling 
The debugfs routines returning pointers can return NULL or error codes
embedded with ERR_PTR(). Check the return values with IS_ERR_OR_NULL().

While we're at it: make the error message more specific so it's not
confused with the one emitted when the top-level gpio-mockup debugfs
directory creation fails.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:28 +01:00
Bartosz Golaszewski 1cea4734f9 gpio: mockup: group code by logic 
Keep GPIO chip callbacks, event trigger callbacks and mockup chip
setup code visibly separated. We're mostly good - just need to move
the line naming routine below.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:28 +01:00
Bartosz Golaszewski 5b7908c024 gpio: mockup: change the type of value field in line state struct 
GPIO values are universally represented as integers. Change the type
of the variable storing the current line value to int for consistency.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:27 +01:00
Bartosz Golaszewski ca8792af40 gpio: mockup: extend the debugfs layout 
Currently each chip has a dedicated directory in debugfs for event
triggers. We use the chip's label for the directory name, but the user
can't really associate these directories with chip names without
parsing the relevant sysfs entries.

Use chip names for directory names. For backward compatibility: create
links pointing to the actual directories named using the chip labels.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:27 +01:00
Bartosz Golaszewski c3196a7828 gpio: mockup: pass the named_lines parameter over platform_data 
Move the last bits of code dealing with module parameters to the init
function. Add a new variable to platform data, which indicates to the
probe function if it should name the GPIO lines. If we ever want to
make the line naming more fine-grained (e.g. per chip switch) it will
be easier this way.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:26 +01:00
Bartosz Golaszewski 6d974d3291 gpio: mockup: merge gpio_mockup_add() into gpio_mockup_probe() 
Now that the probe() function only does what is should, there's no
need to split the chip adding logic into a separate routine. Merge
gpio_mockup_add() into gpio_mockup_probe().

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:26 +01:00
Bartosz Golaszewski b9576d03d5 gpio: mockup: remove a stray tab 
Minor coding style fix.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:25 +01:00
Bartosz Golaszewski f1bec99ae4 gpio: mockup: implement gpio_mockup_err() 
Visually shrink the pr_err() calls by encapsulating adding the module
name prefix to the message in a macro.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:25 +01:00
Bartosz Golaszewski 8a39f597bc gpio: mockup: rework device probing 
We currently create a single platform device in init and then parse
the configuration passed to us via module parameters in probe() before
creating GPIO chips and registering them with the gpiolib framework.

The relation between platform devices and mockup chips should be 1:1.

Create a separate platform device for each mockup chip using convenient
helpers (platform_device_register_resndata()). Pass a platform data
structure to probe() in which the configuration (GPIO base, number of
lines, chip index) extracted from the module params is stored. Make
probe() create a single mockup chip for every platform device.

This approach has several advantages:
- we only parse the module parameters in init() and can bail out before
  attaching any device if the input is invalid (currently we would
  have to examine kernel logs),
- we'll get notified by the device framework about errors in probe()
  for specific chips,
- probe() gets simplified and only does what it's supposed to.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:24 +01:00
Bartosz Golaszewski b447a75100 gpio: mockup: verify the number of GPIO chips requested 
The number of supported mockup chips is limited. Check this limit when
parsing the module parameters.

Also: make sure that each chip is described with a <base - ngpio> pair.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:24 +01:00
Bartosz Golaszewski 20c35ac473 gpio: mockup: parse the module params in init, not probe 
If the module parameters are invalid, we should bail out from the init
function instead of detecting it during the device probe. That way we
don't even allow the user to load the module if we don't accept the
arguments.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:23 +01:00
Bartosz Golaszewski f3b47170e0 gpio: mockup: add missing prefixes 
Add the gpio_mockup_ prefix to the remaining symbols that still don't
have it, so that the entire driver code is consistent.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:23 +01:00
Jesse Chan 539340f37e gpio: ath79: add missing MODULE_DESCRIPTION/LICENSE 
This change resolves a new compile-time warning
when built as a loadable module:

WARNING: modpost: missing MODULE_LICENSE() in drivers/gpio/gpio-ath79.o
see include/linux/module.h for more information

This adds the license as "GPL v2", which matches the header of the file.

MODULE_DESCRIPTION is also added.

Signed-off-by: Jesse Chan <jc@linux.com>
Acked-by: Alban Bedel <albeu@free.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:22 +01:00
Jesse Chan 97b03136e1 gpio: iop: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE 
This change resolves a new compile-time warning
when built as a loadable module:

WARNING: modpost: missing MODULE_LICENSE() in drivers/gpio/gpio-iop.o
see include/linux/module.h for more information

This adds the license as "GPL", which matches the header of the file.

MODULE_DESCRIPTION and MODULE_AUTHOR are also added.

Signed-off-by: Jesse Chan <jc@linux.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:42:21 +01:00
Sergei Shtylyov 8a64e557f3 gpio: pca953x: fix vendor prefix for PCA9654 
Despite commit 55020c8056 ("of: Add vendor prefix for ON Semiconductor
Corp.") was made long ago, the latter commit 9f49f6dd04 ("gpio: pca953x:
add onsemi,pca9654 id") made use of another, undocumented vendor prefix.
Since such prefix doesn't seem to be used in any device trees, I think we
can just fix the "compatible" string in the driver and the bindings and be
done with that...

Fixes: 9f49f6dd04 ("gpio: pca953x: add onsemi,pca9654 id")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-12-02 22:41:43 +01:00
Keerthy 7f8e2a85c1 gpio: davinci: Assign first bank regs for unbanked case 
As per the re-design assign the first bank regs for unbanked
irq case. This was missed out in the original patch.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Fixes: b5cf3fd827 ("gpio: davinci: Redesign driver to accommodate ngpios in one gpio chip")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2017-11-30 15:40:01 +01:00