This reverts commit 957ee7270d
(serial: omap: fix software flow control).
As Russell has pointed out, that commit isn't fixing
Software Flow Control at all, and it actually makes
it even more broken.
It was agreed to revert this commit and use Russell's
latest UART patches instead.
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch converts all static variables of clps711x serial driver
to dynamic allocating. In this case we are should remove console_initcall()
and declare console during driver registration. Early kernel messages can
be retrieved by add "earlyprintk" option to the kernel command line.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Actually, in order to support KGDB over serial console one must
implement two callbacks for character polling. Clone them from
8250 driver with a bit of tuning.
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Marko Katic <dromede@gmail.com>
CC: Eric Miao <eric.y.miao@gmail.com>
CC: Russell King <linux@arm.linux.org.uk>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
drivers/tty/serial/pxa.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 55 insertions(+), 0 deletions(-)
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The current CE4100 and 8250_pci code have both a limitation preventing the
registration and usage of CE4100's second UART. This patch changes the
platform code fixing up the UART port to work on a relative UART port
base address, as well as the 8250_pci code to make it register 2 UART ports
for CE4100 and pass the port index down to all consumers.
Signed-off-by: Florian Fainelli <ffainelli@freebox.fr>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
vt8500_port is malloced in vt8500_serial_probe() and should be freed
before leaving from the error handling cases, otherwise it will
cause memory leak.
Fix it by move the allocation of vt8500_port after those test.
dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Tony Prisk <linux@prisktech.co.nz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This allows us to get rid of the ifdefs in 8250.c.
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Modify divisor to select the nearest baud rate divider rather than the
lowest. It minimizes baud rate errors especially on low UART clock
frequencies.
For example, if uartclk is 33000000 and baud is 115200 the ratio is
about 17.9 The current code selects 17 (5% error) but should select 18
(0.5% error).
This 5% error in baud rate leads to garbage on receiving end, while 0.5%
doesn't.
The issue showed up when using the stock 8250 driver for
Synopsys DW UART. This was on a FPGA with ~12MHz UART clock.
When we enabled early serial, we saw garbage which was narrowed down
to the rounding error.
So the bug had been latent and it only showed up with such low clock rates.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Convert clk_enable/clk_disable to clk_prepare_enable/clk_disable_unprepare
calls as required by common clock framework.
Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Here are some tty and serial driver fixes for your 3.7-rc1 tree.
Again, the UABI header file fixes, and a number of build and runtime serial
driver bugfixes that solve problems people have been reporting (the staging
driver is a tty driver, hence the fixes coming in through this tree.)
All of these have been in the linux-next tree for a while.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-3.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull TTY fixes from Greg Kroah-Hartman:
"Here are some tty and serial driver fixes for your 3.7-rc1 tree.
Again, the UABI header file fixes, and a number of build and runtime
serial driver bugfixes that solve problems people have been reporting
(the staging driver is a tty driver, hence the fixes coming in through
this tree.)
All of these have been in the linux-next tree for a while.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
* tag 'tty-3.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
staging: dgrp: check return value of alloc_tty_driver
staging: dgrp: check for NULL pointer in (un)register_proc_table
serial/8250_hp300: Missing 8250 register interface conversion bits
UAPI: (Scripted) Disintegrate include/linux/hsi
tty: serial: sccnxp: Fix bug with unterminated platform_id list
staging: serial: dgrp: Add missing #include <linux/uaccess.h>
serial: sccnxp: Allows the driver to be compiled as a module
tty: Fix bogus "callbacks suppressed" messages
net, TTY: initialize tty->driver_data before usage
commit 2655a2c76f ("8250: use the 8250
register interface not the legacy one") forgot to fully switch one
instance of struct uart_port to struct uart_8250_port, causing the
following compile failure:
drivers/tty/serial/8250/8250_hp300.c: In function ‘hpdca_init_one’:
drivers/tty/serial/8250/8250_hp300.c:174: error: ‘uart’ undeclared (first use in this function)
drivers/tty/serial/8250/8250_hp300.c:174: error: (Each undeclared identifier is reported only once
drivers/tty/serial/8250/8250_hp300.c:174: error: for each function it appears in.)
This went unnoticed in -next, as CONFIG_HPDCA is not set to y by
allmodconfig.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Philip Blundell <philb@gnu.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This syncs up the tty-linus branch to the latest in Linus's tree to get all of
the UAPI stuff needed for the next set of patches to merge.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
It was already pointed out how to fix these cases before the offending
patches were merged, but unsurprisingly, that didn't happen. As this
change is entirely superfluous to begin with, simply shut things up by
casting everything away.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Cleanups
Clean up compile warnings in kgdboc.c and x86/kernel/kgdb.c
Add module event hooks for simplified debugging with gdb
Fixes
Fix kdb to stop paging with 'q' on bta and dmesg
Fix for data that scrolls off the vga console due to line wrapping
when using the kdb pager
New
The debug core registers for kernel module events which allows a
kernel aware gdb to automatically load symbols and break on entry
to a kernel module
Allow kgdboc=kdb to setup kdb on the vga console
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Merge tag 'for_linus-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/kgdb
Pull KGDB/KDB fixes and cleanups from Jason Wessel:
"Cleanups
- Clean up compile warnings in kgdboc.c and x86/kernel/kgdb.c
- Add module event hooks for simplified debugging with gdb
Fixes
- Fix kdb to stop paging with 'q' on bta and dmesg
- Fix for data that scrolls off the vga console due to line wrapping
when using the kdb pager
New
- The debug core registers for kernel module events which allows a
kernel aware gdb to automatically load symbols and break on entry
to a kernel module
- Allow kgdboc=kdb to setup kdb on the vga console"
* tag 'for_linus-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/kgdb:
tty/console: fix warnings in drivers/tty/serial/kgdboc.c
kdb,vt_console: Fix missed data due to pager overruns
kdb: Fix dmesg/bta scroll to quit with 'q'
kgdboc: Accept either kbd or kdb to activate the vga + keyboard kdb shell
kgdb,x86: fix warning about unused variable
mips,kgdb: fix recursive page fault with CONFIG_KPROBES
kgdb: Add module event hooks
It is a common enough mistake for people to specify "kdb" when they
meant to type "kbd" that the kgdboc can just accept both since they
both mean the same thing anyway. Specifically it is for the case
where you want kdb to be active on your graphics console + keyboard
(where kbd was the original abbreviation for keyboard).
With this change kgdboc will now accept either to mean the same thing:
kgdboc=kbd
kgdboc=kdb
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
The build even tells you that this is a bad thing:
drivers/tty/serial/sccnxp: struct platform_device_id is 32 bytes. The
last of 8 is:
0x73 0x63 0x36 0x38 0x36 0x39 0x32 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x54 0x0c 0x01 0x00
0x00 0x00 0x00 0x00
FATAL: drivers/tty/serial/sccnxp: struct platform_device_id is not
terminated with a NULL entry!
So fix this problem up before someone oopses their box when loading the
driver, as this breaks the build.
Cc: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Pull workqueue changes from Tejun Heo:
"This is workqueue updates for v3.7-rc1. A lot of activities this
round including considerable API and behavior cleanups.
* delayed_work combines a timer and a work item. The handling of the
timer part has always been a bit clunky leading to confusing
cancelation API with weird corner-case behaviors. delayed_work is
updated to use new IRQ safe timer and cancelation now works as
expected.
* Another deficiency of delayed_work was lack of the counterpart of
mod_timer() which led to cancel+queue combinations or open-coded
timer+work usages. mod_delayed_work[_on]() are added.
These two delayed_work changes make delayed_work provide interface
and behave like timer which is executed with process context.
* A work item could be executed concurrently on multiple CPUs, which
is rather unintuitive and made flush_work() behavior confusing and
half-broken under certain circumstances. This problem doesn't
exist for non-reentrant workqueues. While non-reentrancy check
isn't free, the overhead is incurred only when a work item bounces
across different CPUs and even in simulated pathological scenario
the overhead isn't too high.
All workqueues are made non-reentrant. This removes the
distinction between flush_[delayed_]work() and
flush_[delayed_]_work_sync(). The former is now as strong as the
latter and the specified work item is guaranteed to have finished
execution of any previous queueing on return.
* In addition to the various bug fixes, Lai redid and simplified CPU
hotplug handling significantly.
* Joonsoo introduced system_highpri_wq and used it during CPU
hotplug.
There are two merge commits - one to pull in IRQ safe timer from
tip/timers/core and the other to pull in CPU hotplug fixes from
wq/for-3.6-fixes as Lai's hotplug restructuring depended on them."
Fixed a number of trivial conflicts, but the more interesting conflicts
were silent ones where the deprecated interfaces had been used by new
code in the merge window, and thus didn't cause any real data conflicts.
Tejun pointed out a few of them, I fixed a couple more.
* 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: (46 commits)
workqueue: remove spurious WARN_ON_ONCE(in_irq()) from try_to_grab_pending()
workqueue: use cwq_set_max_active() helper for workqueue_set_max_active()
workqueue: introduce cwq_set_max_active() helper for thaw_workqueues()
workqueue: remove @delayed from cwq_dec_nr_in_flight()
workqueue: fix possible stall on try_to_grab_pending() of a delayed work item
workqueue: use hotcpu_notifier() for workqueue_cpu_down_callback()
workqueue: use __cpuinit instead of __devinit for cpu callbacks
workqueue: rename manager_mutex to assoc_mutex
workqueue: WORKER_REBIND is no longer necessary for idle rebinding
workqueue: WORKER_REBIND is no longer necessary for busy rebinding
workqueue: reimplement idle worker rebinding
workqueue: deprecate __cancel_delayed_work()
workqueue: reimplement cancel_delayed_work() using try_to_grab_pending()
workqueue: use mod_delayed_work() instead of __cancel + queue
workqueue: use irqsafe timer for delayed_work
workqueue: clean up delayed_work initializers and add missing one
workqueue: make deferrable delayed_work initializer names consistent
workqueue: cosmetic whitespace updates for macro definitions
workqueue: deprecate system_nrt[_freezable]_wq
workqueue: deprecate flush[_delayed]_work_sync()
...
This is a pretty significant branch. It's the introduction of the
first multiplatform support on ARM, and with this (and the later
branch) merged, it is now possible to build one kernel that contains
support for highbank, vexpress, mvebu, socfpga, and picoxcell. More
platforms will be convered over in the next few releases.
Two critical last things had to be done for this to be practical and
possible:
* Today each platform has its own include directory under
mach-<mach>/include/mach/*, and traditionally that is where a lot of
driver/platform shared definitions have gone, such as platform data
structures. They now need to move out to a common location instead,
and this branch moves a large number of those out to
include/linux/platform_data.
* Each platform used to list the device trees to compile for its
boards in mach-<mach>/Makefile.boot.
Both of the above changes will mean that there are some merge
conflicts to come (and some to resolve here). It's a one-time move and
once it settles in, we should be good for quite a while. Sorry for the
overhead.
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Merge tag 'multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM soc multiplatform enablement from Olof Johansson:
"This is a pretty significant branch. It's the introduction of the
first multiplatform support on ARM, and with this (and the later
branch) merged, it is now possible to build one kernel that contains
support for highbank, vexpress, mvebu, socfpga, and picoxcell. More
platforms will be convered over in the next few releases.
Two critical last things had to be done for this to be practical and
possible:
* Today each platform has its own include directory under
mach-<mach>/include/mach/*, and traditionally that is where a lot
of driver/platform shared definitions have gone, such as platform
data structures. They now need to move out to a common location
instead, and this branch moves a large number of those out to
include/linux/platform_data.
* Each platform used to list the device trees to compile for its
boards in mach-<mach>/Makefile.boot.
Both of the above changes will mean that there are some merge
conflicts to come (and some to resolve here). It's a one-time move
and once it settles in, we should be good for quite a while. Sorry
for the overhead."
Fix conflicts as per Olof.
* tag 'multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (51 commits)
ARM: add v7 multi-platform defconfig
ARM: msm: Move core.h contents into common.h
ARM: highbank: call highbank_pm_init from .init_machine
ARM: dtb: move all dtb targets to common Makefile
ARM: spear: move platform_data definitions
ARM: samsung: move platform_data definitions
ARM: orion: move platform_data definitions
ARM: vexpress: convert to multi-platform
ARM: initial multiplatform support
ARM: mvebu: move armada-370-xp.h in mach dir
ARM: vexpress: remove dependency on mach/* headers
ARM: picoxcell: remove dependency on mach/* headers
ARM: move all dtb targets out of Makefile.boot
ARM: picoxcell: move debug macros to include/debug
ARM: socfpga: move debug macros to include/debug
ARM: mvebu: move debug macros to include/debug
ARM: vexpress: move debug macros to include/debug
ARM: highbank: move debug macros to include/debug
ARM: move debug macros to common location
ARM: make mach/gpio.h headers optional
...
Device tree conversion and enablement branch. Mostly a bunch of new
bindings and setup for various platforms, but the Via/Winchip VT8500
platform is also converted over from being 100% legacy to now use
device tree for probing. More of that will come for 3.8.
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Merge tag 'dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM soc device tree updates from Olof Johansson:
"Device tree conversion and enablement branch. Mostly a bunch of new
bindings and setup for various platforms, but the Via/Winchip VT8500
platform is also converted over from being 100% legacy to now use
device tree for probing. More of that will come for 3.8."
Trivial conflicts due to removal of vt8500 files, and one documentation
file that was added with slightly different contents both here and in
the USb tree.
* tag 'dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (212 commits)
arm: vt8500: Fixup for missing gpio.h
ARM: LPC32xx: LED fix in PHY3250 DTS file
ARM: dt: mmp-dma: add binding file
arm: vt8500: Update arch-vt8500 to devicetree support.
arm: vt8500: gpio: Devicetree support for arch-vt8500
arm: vt8500: doc: Add device tree bindings for arch-vt8500 devices
arm: vt8500: clk: Add Common Clock Framework support
video: vt8500: Add devicetree support for vt8500-fb and wm8505-fb
serial: vt8500: Add devicetree support for vt8500-serial
rtc: vt8500: Add devicetree support for vt8500-rtc
arm: vt8500: Add device tree files for VIA/Wondermedia SoC's
ARM: tegra: Add Avionic Design Tamonten Evaluation Carrier support
ARM: tegra: Add Avionic Design Medcom-Wide support
ARM: tegra: Add Avionic Design Plutux support
ARM: tegra: Add Avionic Design Tamonten support
ARM: tegra: dts: Add pwm label
ARM: ux500: Fix SSP register address format
ARM: ux500: Apply tc3589x's GPIO/IRQ properties to HREF's DT
ARM: ux500: Remove redundant #gpio-cell properties from Snowball DT
ARM: ux500: Add all encompassing sound node to the HREF Device Tree
...
This is a large branch that contains a handful of different cleanups:
- Fixing up the I/O space remapping on PCI on ARM. This is a series
from Rob Herring that restructures how all pci devices allocate I/O
space, and it's part of the work to allow multiplatform kernels.
- A number of cleanup series for OMAP, moving and removing some
headers, sparse irq rework and in general preparation for
multiplatform.
- Final removal of all non-DT boards for Tegra, it is now
device-tree-only!
- Removal of a stale platform, nxp4008. It's an old mobile chipset
that is no longer in use, and was very likely never really used with
a mainline kernel. We have not been able to find anyone interested
in keeping it around in the kernel.
- Removal of the legacy dmaengine driver on tegra
+ A handful of other things that I haven't described above.
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Merge tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM soc general cleanups from Olof Johansson:
"This is a large branch that contains a handful of different cleanups:
- Fixing up the I/O space remapping on PCI on ARM. This is a series
from Rob Herring that restructures how all pci devices allocate I/O
space, and it's part of the work to allow multiplatform kernels.
- A number of cleanup series for OMAP, moving and removing some
headers, sparse irq rework and in general preparation for
multiplatform.
- Final removal of all non-DT boards for Tegra, it is now
device-tree-only!
- Removal of a stale platform, nxp4008. It's an old mobile chipset
that is no longer in use, and was very likely never really used
with a mainline kernel. We have not been able to find anyone
interested in keeping it around in the kernel.
- Removal of the legacy dmaengine driver on tegra
+ A handful of other things that I haven't described above."
Fix up some conflicts with the staging tree (and because nxp4008 was
removed)
* tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (184 commits)
ARM: OMAP2+: serial: Change MAX_HSUART_PORTS to 6
ARM: OMAP4: twl-common: Support for additional devices on i2c1 bus
ARM: mmp: using for_each_set_bit to simplify the code
ARM: tegra: harmony: fix ldo7 regulator-name
ARM: OMAP2+: Make omap4-keypad.h local
ARM: OMAP2+: Make l4_3xxx.h local
ARM: OMAP2+: Make l4_2xxx.h local
ARM: OMAP2+: Make l3_3xxx.h local
ARM: OMAP2+: Make l3_2xxx.h local
ARM: OMAP1: Move irda.h from plat to mach
ARM: OMAP2+: Make hdq1w.h local
ARM: OMAP2+: Make gpmc-smsc911x.h local
ARM: OMAP2+: Make gpmc-smc91x.h local
ARM: OMAP1: Move flash.h from plat to mach
ARM: OMAP2+: Make debug-devices.h local
ARM: OMAP1: Move board-voiceblue.h from plat to mach
ARM: OMAP1: Move board-sx1.h from plat to mach
ARM: OMAP2+: Make omap-wakeupgen.h local
ARM: OMAP2+: Make omap-secure.h local
ARM: OMAP2+: Make ctrl_module_wkup_44xx.h local
...
These were submitted as bug fixes before v3.6 but not considered important
enough to be included in it. Some of them cross over to cleanup territory
as well, and aren't strictly bugfixes.
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Merge tag 'fixes-non-critical' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull non-critical ARM soc bug fixes from Olof Johansson:
"These were submitted as bug fixes before v3.6 but not considered
important enough to be included in it. Some of them cross over to
cleanup territory as well, and aren't strictly bugfixes."
* tag 'fixes-non-critical' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (48 commits)
ARM: nomadik: remove NAND_NO_READRDY use
ARM: pxa: fix return value check in pxa2xx_drv_pcmcia_probe()
ARM: SAMSUNG: Add missing variable declaration in s3c64xx_spi1_set_platdata()
ARM: S3C24XX: removes unnecessary semicolon
ARM: S3C24xx: delete double assignment
ARM: EXYNOS: fix address for EXYNOS4 MDMA1
ARM: EXYNOS: fixed SYSMMU setup definition to mate parameter name
ARM: ep93xx: Move ts72xx.h out of include/mach
ARM: ep93xx: use __iomem pointers for MMIO
ARM: msm: Fix early debug uart mapping on some memory configs
ARM: msm: io: Change the default static iomappings to be shared
ARM: msm: io: Remove 7x30 iomap region from 7x00
ARM: msm: Remove call to missing FPGA init on 8660
ARM: OMAP4: wakeupgen: remove duplicate AUXCOREBOOT* read/write
ARM: OMAP4: wakeupgen: Fix the typo in AUXCOREBOOT register save
dma: tegra: make data used as *of_device_id.data const
can: mpc5xxx_can: make data used as *of_device_id.data const
macintosh/mediabay: make data used as *of_device_id.data const
i2c/mpc: make data used as *of_device_id.data const
mfd/da9052: make i2c_device_id array const
...
As we skipped the merge window for 3.6-rc1 for the tty tree, everything
is now settled down and working properly, so we are ready for 3.7-rc1.
Here's the patchset, it's big, but the large changes are removing a
firmware file and adding a staging tty driver (it depended on the tty
core changes, so it's going through this tree instead of the staging
tree.)
All of these patches have been in the linux-next tree for a while.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull TTY changes from Greg Kroah-Hartman:
"As we skipped the merge window for 3.6-rc1 for the tty tree,
everything is now settled down and working properly, so we are ready
for 3.7-rc1. Here's the patchset, it's big, but the large changes are
removing a firmware file and adding a staging tty driver (it depended
on the tty core changes, so it's going through this tree instead of
the staging tree.)
All of these patches have been in the linux-next tree for a while.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
Fix up more-or-less trivial conflicts in
- drivers/char/pcmcia/synclink_cs.c:
tty NULL dereference fix vs tty_port_cts_enabled() helper function
- drivers/staging/{Kconfig,Makefile}:
add-add conflict (dgrp driver added close to other staging drivers)
- drivers/staging/ipack/devices/ipoctal.c:
"split ipoctal_channel from iopctal" vs "TTY: use tty_port_register_device"
* tag 'tty-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (235 commits)
tty/serial: Add kgdb_nmi driver
tty/serial/amba-pl011: Quiesce interrupts in poll_get_char
tty/serial/amba-pl011: Implement poll_init callback
tty/serial/core: Introduce poll_init callback
kdb: Turn KGDB_KDB=n stubs into static inlines
kdb: Implement disable_nmi command
kernel/debug: Mask KGDB NMI upon entry
serial: pl011: handle corruption at high clock speeds
serial: sccnxp: Make 'default' choice in switch last
serial: sccnxp: Remove mask termios caps for SW flow control
serial: sccnxp: Report actual baudrate back to core
serial: samsung: Add poll_get_char & poll_put_char
Powerpc 8xx CPM_UART setting MAXIDL register proportionaly to baud rate
Powerpc 8xx CPM_UART maxidl should not depend on fifo size
Powerpc 8xx CPM_UART too many interrupts
Powerpc 8xx CPM_UART desynchronisation
serial: set correct baud_base for EXSYS EX-41092 Dual 16950
serial: omap: fix the reciever line error case
8250: blacklist Winbond CIR port
8250_pnp: do pnp probe before legacy probe
...
Host bridge hotplug
- Protect acpi_pci_drivers and acpi_pci_roots (Taku Izumi)
- Clear host bridge resource info to avoid issue when releasing (Yinghai Lu)
- Notify acpi_pci_drivers when hot-plugging host bridges (Jiang Liu)
- Use standard list ops for acpi_pci_drivers (Jiang Liu)
Device hotplug
- Use pci_get_domain_bus_and_slot() to close hotplug races (Jiang Liu)
- Remove fakephp driver (Bjorn Helgaas)
- Fix VGA ref count in hotplug remove path (Yinghai Lu)
- Allow acpiphp to handle PCIe ports without native hotplug (Jiang Liu)
- Implement resume regardless of pciehp_force param (Oliver Neukum)
- Make pci_fixup_irqs() work after init (Thierry Reding)
Miscellaneous
- Add pci_pcie_type(dev) and remove pci_dev.pcie_type (Yijing Wang)
- Factor out PCI Express Capability accessors (Jiang Liu)
- Add pcibios_window_alignment() so powerpc EEH can use generic resource assignment (Gavin Shan)
- Make pci_error_handlers const (Stephen Hemminger)
- Cleanup drivers/pci/remove.c (Bjorn Helgaas)
- Improve Vendor-Specific Extended Capability support (Bjorn Helgaas)
- Use standard list ops for bus->devices (Bjorn Helgaas)
- Avoid kmalloc in pci_get_subsys() and pci_get_class() (Feng Tang)
- Reassign invalid bus number ranges (Intel DP43BF workaround) (Yinghai Lu)
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Merge tag 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI changes from Bjorn Helgaas:
"Host bridge hotplug
- Protect acpi_pci_drivers and acpi_pci_roots (Taku Izumi)
- Clear host bridge resource info to avoid issue when releasing
(Yinghai Lu)
- Notify acpi_pci_drivers when hot-plugging host bridges (Jiang Liu)
- Use standard list ops for acpi_pci_drivers (Jiang Liu)
Device hotplug
- Use pci_get_domain_bus_and_slot() to close hotplug races (Jiang
Liu)
- Remove fakephp driver (Bjorn Helgaas)
- Fix VGA ref count in hotplug remove path (Yinghai Lu)
- Allow acpiphp to handle PCIe ports without native hotplug (Jiang
Liu)
- Implement resume regardless of pciehp_force param (Oliver Neukum)
- Make pci_fixup_irqs() work after init (Thierry Reding)
Miscellaneous
- Add pci_pcie_type(dev) and remove pci_dev.pcie_type (Yijing Wang)
- Factor out PCI Express Capability accessors (Jiang Liu)
- Add pcibios_window_alignment() so powerpc EEH can use generic
resource assignment (Gavin Shan)
- Make pci_error_handlers const (Stephen Hemminger)
- Cleanup drivers/pci/remove.c (Bjorn Helgaas)
- Improve Vendor-Specific Extended Capability support (Bjorn
Helgaas)
- Use standard list ops for bus->devices (Bjorn Helgaas)
- Avoid kmalloc in pci_get_subsys() and pci_get_class() (Feng Tang)
- Reassign invalid bus number ranges (Intel DP43BF workaround)
(Yinghai Lu)"
* tag 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (102 commits)
PCI: acpiphp: Handle PCIe ports without native hotplug capability
PCI/ACPI: Use acpi_driver_data() rather than searching acpi_pci_roots
PCI/ACPI: Protect acpi_pci_roots list with mutex
PCI/ACPI: Use acpi_pci_root info rather than looking it up again
PCI/ACPI: Pass acpi_pci_root to acpi_pci_drivers' add/remove interface
PCI/ACPI: Protect acpi_pci_drivers list with mutex
PCI/ACPI: Notify acpi_pci_drivers when hot-plugging PCI root bridges
PCI/ACPI: Use normal list for struct acpi_pci_driver
PCI/ACPI: Use DEVICE_ACPI_HANDLE rather than searching acpi_pci_roots
PCI: Fix default vga ref_count
ia64/PCI: Clear host bridge aperture struct resource
x86/PCI: Clear host bridge aperture struct resource
PCI: Stop all children first, before removing all children
Revert "PCI: Use hotplug-safe pci_get_domain_bus_and_slot()"
PCI: Provide a default pcibios_update_irq()
PCI: Discard __init annotations for pci_fixup_irqs() and related functions
PCI: Use correct type when freeing bus resource list
PCI: Check P2P bridge for invalid secondary/subordinate range
PCI: Convert "new_id"/"remove_id" into generic pci_bus driver attributes
xen-pcifront: Use hotplug-safe pci_get_domain_bus_and_slot()
...
This special driver makes it possible to temporary use NMI debugger port
as a normal console by issuing 'nmi_console' command (assuming that the
port is attached to KGDB).
Unlike KDB's disable_nmi command, with this driver you are always able
to go back to the debugger using KGDB escape sequence ($3#33). This is
because this console driver processes the input in NMI context, and thus
is able to intercept the magic sequence.
Note that since the console interprets input and uses polling
communication methods, for things like PPP it is still better to fully
detach debugger port from the KGDB NMI (i.e. disable_nmi), and use raw
console.
Usually, to enter the debugger one have to type the magic sequence, so
initially the kernel will print the following prompt on the NMI debugger
console:
Type $3#33 to enter the debugger>
For convenience, there is a kgdb_fiq.knock kernel command line option,
when set to 0, this turns the special command to just a return key
press, so the kernel will be printing this:
Hit <return> to enter the debugger>
This is more convenient for long debugging sessions, although it makes
nmi_console feature somewhat useless.
And for the cases when NMI connected to a dedicated button, the knocking
can be disabled altogether by setting kgdb_fiq.knock to -1.
Suggested-by: Colin Cross <ccross@android.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: Alan Cox <alan@linux.intel.com>
Acked-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We need to quiesce interrupts in the poll_get_char routine, otherwise,
if used with KGDB NMI debugger, we'll keep reentering the NMI.
Quiescing interrupts is pretty straightforward, except for TXIM
interrupt. The interrupt has "ready to transmit" meaning, so it's
almost always raised, and the only way to silence it is to mask it. But
that's OK, ops->start_tx will unmask it.
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The callback is used to initialize the hardware, nothing else should be
done, i.e. we should not request interrupts (but we can and do unmask
some of them, as they might be useful for NMI entry).
As a side-effect, the patch also fixes a division by zero[1] when booting
with kgdboc options specified (e.g. kgdboc=ttyAMA0,115200n8). The issue
happens because serial core calls set_termios callback, but the driver
doesn't know clock frequency, and thus cannot calculate proper baud rate
values.
[1]
WARNING: at drivers/tty/serial/serial_core.c:400 uart_get_baud_rate+0xe8/0x14c()
Modules linked in:
[<c0018e50>] (unwind_backtrace+0x0/0xf0) from [<c0020ae8>] (warn_slowpath_common+0x4c/0x64)
[<c0020ae8>] (warn_slowpath_common+0x4c/0x64) from [<c0020b1c>] (warn_slowpath_null+0x1c/0x24)
[<c0020b1c>] (warn_slowpath_null+0x1c/0x24) from [<c0185ed8>] (uart_get_baud_rate+0xe8/0x14c)
[<c0185ed8>] (uart_get_baud_rate+0xe8/0x14c) from [<c0187078>] (pl011_set_termios+0x48/0x278)
[<c0187078>] (pl011_set_termios+0x48/0x278) from [<c01850b0>] (uart_set_options+0xe8/0x114)
[<c01850b0>] (uart_set_options+0xe8/0x114) from [<c0185de4>] (uart_poll_init+0xd4/0xe0)
[<c0185de4>] (uart_poll_init+0xd4/0xe0) from [<c016da8c>] (tty_find_polling_driver+0x100/0x17c)
[<c016da8c>] (tty_find_polling_driver+0x100/0x17c) from [<c0188538>] (configure_kgdboc+0xc8/0x1b8)
[<c0188538>] (configure_kgdboc+0xc8/0x1b8) from [<c00088a4>] (do_one_initcall+0x30/0x168)
[<c00088a4>] (do_one_initcall+0x30/0x168) from [<c033784c>] (do_basic_setup+0x94/0xc8)
[<c033784c>] (do_basic_setup+0x94/0xc8) from [<c03378e0>] (kernel_init+0x60/0xf4)
[<c03378e0>] (kernel_init+0x60/0xf4) from [<c00144a0>] (kernel_thread_exit+0x0/0x8)
---[ end trace 7d41c9186f342c40 ]---
Division by zero in kernel.
[<c0018e50>] (unwind_backtrace+0x0/0xf0) from [<c014546c>] (Ldiv0+0x8/0x10)
[<c014546c>] (Ldiv0+0x8/0x10) from [<c0187098>] (pl011_set_termios+0x68/0x278)
[<c0187098>] (pl011_set_termios+0x68/0x278) from [<c01850b0>] (uart_set_options+0xe8/0x114)
[<c01850b0>] (uart_set_options+0xe8/0x114) from [<c0185de4>] (uart_poll_init+0xd4/0xe0)
[<c0185de4>] (uart_poll_init+0xd4/0xe0) from [<c016da8c>] (tty_find_polling_driver+0x100/0x17c)
[<c016da8c>] (tty_find_polling_driver+0x100/0x17c) from [<c0188538>] (configure_kgdboc+0xc8/0x1b8)
[<c0188538>] (configure_kgdboc+0xc8/0x1b8) from [<c00088a4>] (do_one_initcall+0x30/0x168)
[<c00088a4>] (do_one_initcall+0x30/0x168) from [<c033784c>] (do_basic_setup+0x94/0xc8)
[<c033784c>] (do_basic_setup+0x94/0xc8) from [<c03378e0>] (kernel_init+0x60/0xf4)
[<c03378e0>] (kernel_init+0x60/0xf4) from [<c00144a0>] (kernel_thread_exit+0x0/0x8)
Division by zero in kernel.
[<c0018e50>] (unwind_backtrace+0x0/0xf0) from [<c014546c>] (Ldiv0+0x8/0x10)
[<c014546c>] (Ldiv0+0x8/0x10) from [<c0183a98>] (uart_update_timeout+0x4c/0x5c)
[<c0183a98>] (uart_update_timeout+0x4c/0x5c) from [<c01870f8>] (pl011_set_termios+0xc8/0x278)
[<c01870f8>] (pl011_set_termios+0xc8/0x278) from [<c01850b0>] (uart_set_options+0xe8/0x114)
[<c01850b0>] (uart_set_options+0xe8/0x114) from [<c0185de4>] (uart_poll_init+0xd4/0xe0)
[<c0185de4>] (uart_poll_init+0xd4/0xe0) from [<c016da8c>] (tty_find_polling_driver+0x100/0x17c)
[<c016da8c>] (tty_find_polling_driver+0x100/0x17c) from [<c0188538>] (configure_kgdboc+0xc8/0x1b8)
[<c0188538>] (configure_kgdboc+0xc8/0x1b8) from [<c00088a4>] (do_one_initcall+0x30/0x168)
[<c00088a4>] (do_one_initcall+0x30/0x168) from [<c033784c>] (do_basic_setup+0x94/0xc8)
[<c033784c>] (do_basic_setup+0x94/0xc8) from [<c03378e0>] (kernel_init+0x60/0xf4)
[<c03378e0>] (kernel_init+0x60/0xf4) from [<c00144a0>] (kernel_thread_exit+0x0/0x8)
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
It was noticed that polling drivers (like KGDB) are not able to use
serial ports if the ports were not previously initialized via console.
I.e. when booting with console=ttyAMA0 kgdboc=ttyAMA0, everything works
fine, but with console=ttyFOO kgdboc=ttyAMA0, the kgdboc doesn't work.
This is because we don't initialize the hardware. Calling ->startup() is
not an option, because drivers request interrupts there, and drivers
fail to handle situations when tty isn't opened with interrupts enabled.
So, we have to implement a new callback (actually, tty_ops already have
a similar callback), which does everything needed to initialize just the
hardware.
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This works around a few glitches in the ST version of the PL011
serial driver when using very high baud rates, as we do in the
Ux500: 3, 3.25, 4 and 4.05 Mbps.
Problem Observed/rootcause:
When using high baud-rates, and the baudrate*8 is getting close to
the provided clock frequency (so a division factor close to 1), when
using bursts of characters (so they are abutted), then it seems as if
there is not enough time to detect the beginning of the start-bit which
is a timing reference for the entire character, and thus the sampling
moment of character bits is moving towards the end of each bit, instead
of the middle.
Fix:
Increase slightly the RX baud rate of the UART above the theoretical
baudrate by 5%. This will definitely give more margin time to the
UART_RX to correctly sample the data at the middle of the bit period.
Also fix the ages old copy-paste error in the very stressed comment,
it's referencing the registers used in the PL010 driver rather than
the PL011 ones.
Signed-off-by: Guillaume Jaunet <guillaume.jaunet@stericsson.com>
Signed-off-by: Christophe Arnal <christophe.arnal@stericsson.com>
Signed-off-by: Matthias Locher <matthias.locher@stericsson.com>
Signed-off-by: Rajanikanth HV <rajanikanth.hv@stericsson.com>
Cc: stable <stable@vger.kernel.org>
Cc: Bibek Basu <bibek.basu@stericsson.com>
Cc: Par-Gunnar Hjalmdahl <par-gunnar.hjalmdahl@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The kernel will handle IXON/IXOFF/IXANY in software if the hardware
doesn't do it.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The following patch allows users to use KGDB over serial console on
board based on Samsung SOC. It has been tested on a board using
exynos5.
[dianders: changed poll to return NO_POLL_CHAR, which appears to
fix 'help' in kgdb; also updated commit message]
Signed-off-by: Julien Pichon <pichon.jln@gmail.com>
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
MAXIDL is the timeout after which a receive buffer is closed when not full if
no more characters are received. We calculate it from the baudrate so that the
duration is always the same at standard rates: about 4ms. At 9600 bauds it gives
a timeout of 4 characters, which is the timeout on the 8250 UART.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
maxidl register was set to fifo size. There is no reason to set this
register to same value as fifo size. Setting it now to 0x10 by default
as in the UCC UART driver.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Setting the fifo to only 1 byte generates one interrupt every 1ms at 9600 bauds.
This is too much. This patch reduces the threshold to speeds below 2400 bauds
like in the 8250 UART driver.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch fixes a desynchronisation problem with CPM UART driver on
Powerpc MPC8xx. The problem happens if data is received before the device
is open by the user application.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Apparently the same card model has two IDs, so this patch
complements the commit 39aced68d6
adding the missing one.
Signed-off-by: Flavio Leitner <fbl@redhat.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch does the following
- In case of errors if there least one data character in the RX FIFO
read it otherwise it may stall the receiver.
This is recommended in the interrupt reset method in the table 23-246 of
the omap4 TRM.
Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Tested-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The legacy serial driver will detect the Winbond CIR device as a serial
port, since it looks exactly like a serial port unless you know what
it is from the PNP ID.
Here we track this port as a special PORT_8250_CIR type, preventing the
legacy serial driver from probing it.
Signed-off-by: Sean Young <sean@mess.org>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We first probe the legacy serial ports and then check pnp. If there
is a non-standard configuration then this might not work, also this
change is needed so we can blacklist Winbond CIR based on PNP ID.
For this to work the 8250_pnp driver must be merged into the 8250
module.
Signed-off-by: Sean Young <sean@mess.org>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
remove existing non-dt code.
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Merge tag 'vt8500-for-next' of git://git.code.sf.net/p/linuxwmt/code into next/dt
From Tony Prisk:
Update arch-vt8500 and drivers to device tree and
remove existing non-dt code.
* tag 'vt8500-for-next' of git://git.code.sf.net/p/linuxwmt/code:
arm: vt8500: Update arch-vt8500 to devicetree support.
arm: vt8500: gpio: Devicetree support for arch-vt8500
arm: vt8500: doc: Add device tree bindings for arch-vt8500 devices
arm: vt8500: clk: Add Common Clock Framework support
video: vt8500: Add devicetree support for vt8500-fb and wm8505-fb
serial: vt8500: Add devicetree support for vt8500-serial
rtc: vt8500: Add devicetree support for vt8500-rtc
arm: vt8500: Add device tree files for VIA/Wondermedia SoC's
Resolved add/change conflict in drivers/clk/Makefile.
Signed-off-by: Olof Johansson <olof@lixom.net>
* 'for-arm-soc-next' of git://git.linaro.org/people/ljones/linux-3.0-ux500:
ARM: ux500: Fix SSP register address format
ARM: ux500: Apply tc3589x's GPIO/IRQ properties to HREF's DT
ARM: ux500: Remove redundant #gpio-cell properties from Snowball DT
ARM: ux500: Add all encompassing sound node to the HREF Device Tree
ARM: ux500: Add nodes for the MSP into the HREF Device Tree
ARM: ux500: Add all known I2C sub-device nodes to the HREF DT
ARM: ux500: Stop registering I2C sub-devices for HREF when DT is enabled
ARM: ux500: Stop registering Audio devices for HREF when DT is enabled
ARM: ux500: Add all encompassing sound node to the Snowball Device Tree
ARM: ux500: Add nodes for the MSP into Device Tree
ARM: ux500: Rename MSP board file to something more meaningful
ARM: ux500: Remove platform registration of MSP devices
ARM: ux500: Stop registering the MOP500 Audio driver from platform code
ARM: ux500: Pass MSP DMA platform data though AUXDATA
ARM: ux500: Fork MSP platform registration for step-by-step DT enablement
ARM: ux500: Add AB8500 CODEC node to DB8500 Device Tree
ARM: ux500: Clean-up MSP platform code
ARM: ux500: Pass SDI DMA information though AUX_DATA to MMCI
ARM: ux500: Add UART support to the HREF Device Tree
ARM: ux500: Add skeleton Device Tree for the HREF reference board
...
+ sync to v3.6-rc6
__iomem annotation cleanup branch from Arnd.
* cleanup/__iomem: (21 commits)
net: seeq: use __iomem pointers for MMIO
video: da8xx-fb: use __iomem pointers for MMIO
scsi: eesox: use __iomem pointers for MMIO
serial: ks8695: use __iomem pointers for MMIO
input: rpcmouse: use __iomem pointers for MMIO
ARM: samsung: use __iomem pointers for MMIO
ARM: spear13xx: use __iomem pointers for MMIO
ARM: sa1100: use __iomem pointers for MMIO
ARM: prima2: use __iomem pointers for MMIO
ARM: nomadik: use __iomem pointers for MMIO
ARM: msm: use __iomem pointers for MMIO
ARM: lpc32xx: use __iomem pointers for MMIO
ARM: ks8695: use __iomem pointers for MMIO
ARM: ixp4xx: use __iomem pointers for MMIO
ARM: iop32x: use __iomem pointers for MMIO
ARM: iop13xx: use __iomem pointers for MMIO
ARM: integrator: use __iomem pointers for MMIO
ARM: imx: use __iomem pointers for MMIO
ARM: ebsa110: use __iomem pointers for MMIO
ARM: at91: use __iomem pointers for MMIO
...
Signed-off-by: Olof Johansson <olof@lixom.net>
Drop the check for "up" being valid on suspend/resume callbacks.
It should be valid always. Get rid of the "pdata" check also as
serial_omap_get_context_loss_count() checks for it.
Tested on omap4 panda and 3630 based Beagle board.
Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
platform_get_drvdata always retrun a valid value after probe succeed.
It also fixed smatch warnings:
drivers/tty/serial/imx.c:1376 serial_imx_suspend() warn: variable dereferenced before check 'sport' (see line 1372)
drivers/tty/serial/imx.c:1392 serial_imx_resume() warn: variable dereferenced before check 'sport' (see line 1388)
Signed-off-by: Richard Zhao <richard.zhao@freescale.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The autoconfig prints messages while holding the
port's spinlock and that causes a deadlock when
using serial console.
Signed-off-by: Flavio Leitner <fbl@redhat.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If a serial driver is called post hangup with a second DCD event then we
will attempt to get the ldisc of NULL. Check we have a tty before trying to
do anything with it.
This is still only safe within the uart layer if the caller holds the
relevant uart locks. We could do with a version where the tty is passed for
more general use.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Increase vt8500_max_ports to 6 as the WM8505 as 6 available uarts.
Use devicetree port id as primary addressing for ports but allow
auto-allocation if id not specified.
Signed-off-by: Tony Prisk <linux@prisktech.co.nz>
Acked-by: Alan Cox <alan@linux.intel.com>
The Tegra code-base has contained both a legacy DMA and a dmaengine
driver since v3.6-rcX. This series flips Tegra's defconfig to enable
dmaengine rather than the legacy driver, and removes the legacy driver
and all client code.
The branch is based on v3.6-rc6 in order to pick up a bug-fix to the
ASoC Tegra PCM driver that's required for audio to work correctly when
using dmaengine.
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Merge tag 'tegra-for-3.7-dmaengine' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into next/cleanup
ARM: tegra: switch to dmaengine
The Tegra code-base has contained both a legacy DMA and a dmaengine
driver since v3.6-rcX. This series flips Tegra's defconfig to enable
dmaengine rather than the legacy driver, and removes the legacy driver
and all client code.
* tag 'tegra-for-3.7-dmaengine' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra:
ASoC: tegra: remove support of legacy DMA driver based access
spi: tegra: remove support of legacy DMA driver based access
ARM: tegra: apbio: remove support of legacy DMA driver based access
ARM: tegra: dma: remove legacy APB DMA driver
ARM: tegra: config: enable dmaengine based APB DMA driver
+ sync to 3.6-rc6
ARM is moving to stricter checks on readl/write functions,
so we need to use the correct types everywhere.
Cc: Alan Cox <alan@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Alan says these are not production ready, and users should be told this,
so put the "(EXPERIMENTAL)" marking back in the Kconfig entry string.
Reported-by: Alan Cox <alan@linux.intel.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
As discussed at the kernel summit this year, CONFIG_EXPERIMENTAL means
nothing, so let's get rid of it.
Cc: Kees Cook <keescook@chromium.org>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Return the value returned by the failing function instead
of -1 (which does not convey the right error information).
Fixes the following smatch warning:
drivers/tty/serial/samsung.c:1687 s3c24xx_serial_modinit() info:
why not propagate 'ret' from uart_register_driver() instead of -1?
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We don't want to free a random address if the entry is wrong, cover
this and WARN if it ever happens.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Platform data for device drivers should be defined in
include/linux/platform_data/*.h, not in the architecture
and platform specific directories.
This moves such data out of the imx include directories
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Sascha Hauer <kernel@pengutronix.de>
Acked-by: Vinod Koul <vinod.koul@linux.intel.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Dan Williams <djbw@fb.com>
Cc: "Ben Dooks (embedded platforms)" <ben-linux@fluff.org>
Cc: "Wolfram Sang (embedded platforms)" <w.sang@pengutronix.de>
Cc: Chris Ball <cjb@laptop.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Liam Girdwood <lrg@ti.com>
Cc: Javier Martin <javier.martin@vista-silicon.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
* commit 'v3.6-rc5': (1098 commits)
Linux 3.6-rc5
HID: tpkbd: work even if the new Lenovo Keyboard driver is not configured
Remove user-triggerable BUG from mpol_to_str
xen/pciback: Fix proper FLR steps.
uml: fix compile error in deliver_alarm()
dj: memory scribble in logi_dj
Fix order of arguments to compat_put_time[spec|val]
xen: Use correct masking in xen_swiotlb_alloc_coherent.
xen: fix logical error in tlb flushing
xen/p2m: Fix one-off error in checking the P2M tree directory.
powerpc: Don't use __put_user() in patch_instruction
powerpc: Make sure IPI handlers see data written by IPI senders
powerpc: Restore correct DSCR in context switch
powerpc: Fix DSCR inheritance in copy_thread()
powerpc: Keep thread.dscr and thread.dscr_inherit in sync
powerpc: Update DSCR on all CPUs when writing sysfs dscr_default
powerpc/powernv: Always go into nap mode when CPU is offline
powerpc: Give hypervisor decrementer interrupts their own handler
powerpc/vphn: Fix arch_update_cpu_topology() return value
ARM: gemini: fix the gemini build
...
Conflicts:
drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
drivers/rapidio/devices/tsi721.c
From "Uwe Kleine-Knig" <u.kleine-koenig@pengutronix.de>:
this is the 2nd version of this series whose goal is to make struct
of_device_id.data const. Conceptually a driver must not modify the data
contained there so making it const is the right thing.
v1 of this series was sent with Message-id:
1342182734-321-1-git-send-email-y. Changes since then are:
- powerpc fixes
- several new consts that were found by Arnd that are possible after
patch 19.
Arnd suggested to take this series via arm-soc late for 3.6 in one go
because patch 19 depends on the former patches but is a precondition to
the latter and it fixes a few warnings. So getting it in via the
respective maintainer trees would need a much bigger coordination
effort. That means I prefer getting Acks over you taking the patch.
Vinod Koul already took
dmaengine: at_hdmac: add a few const qualifiers
that is in next-20120723 as 7fd63ccdad now. Vinod, I don't follow your
pull requests, but assuming you didn't let it already pull for 3.6 I
suggest you drop it from your queue and I just take your Ack.
This series was build tested for arm (all defconfigs) and powerpc (all
defconfigs and an allyesconfig) and grep didn't find more issues. As
before it introduces a warning in drivers/regulator/twl-regulator.c.
This driver does modify its .of_match_table when a device is bound which
doesn't fits the concept of independant devices. Arnd noticed another
new warning in drivers/scsi/qlogicpti.c that isn't that easy to resolve,
because the pointer to (now) const data is passed as first argument to
scsi_host_alloc. To fix that properly struct Scsi_Host.hostt needs to
get a const, too. Alternatively I could introduce a cast removing the
const, but I don't like that.
* 'ofdeviceiddata' of git://git.pengutronix.de/git/ukl/linux: (25 commits)
dma: tegra: make data used as *of_device_id.data const
can: mpc5xxx_can: make data used as *of_device_id.data const
macintosh/mediabay: make data used as *of_device_id.data const
i2c/mpc: make data used as *of_device_id.data const
mfd/da9052: make i2c_device_id array const
powerpc/fsl_msi: drop unneeded cast to non-const pointer
gpio/gpio-omap: make platformdata used as *of_device_id.data const
of: add const to struct *of_device_id.data
dma: tegra: make tegra_dma.chip_data a pointer to const data
watchdog/mpc8xxx: add a const qualifier
powerpc/celleb_pci: add a const qualifier
powerpc/fsl_msi: add a const qualifier
powerpc/83xx: add a const qualifier
macintosh/mediabay: add a const qualifier
mmc/omap_hsmmc: add a const qualifier
i2c/mpc: add a const qualifier
i2c/i2c-omap: add a const qualifier
gpio/mpc8xxx: add a const qualifier
gpio/gpio-omap.c: add a const qualifier
misc/atmel_tc: make atmel_tc.tcb_config member point to const data
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
[olof: repulled a v3 version of the branch that rebased to add some more
acked-bys and added one more patch on top for tegra]
Signed-off-by: Olof Johansson <olof@lixom.net>
The mxs_auart_probe() gets the device by the get_device().
So we should put the device in the error path to balance the
device's reference counter.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
These workarounds do not apply for CONFIG_ARCH_OMAP2PLUS at all,
so let's make it just CONFIG_ARCH_OMAP1.
This is needed to for ARM common zImage changes for
omap2+ to avoid including plat and mach headers.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This prepares *of_device_id.data becoming const. Without this change
the following warning would occur:
drivers/tty/serial/mpc52xx_uart.c: In function 'mpc52xx_uart_of_enumerate':
drivers/tty/serial/mpc52xx_uart.c:1440:11: warning: assignment discards 'const' qualifier from pointer target type [enabled by default]
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
The driver explicitly requests a clock rate for the UART, but it is
off by a factor of four from the dividers that it programs into the
UART. Fix this by setting the rate to 1/4 of the current value.
Signed-off-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The bug flag .interrupt_may_hang is not used since commit
4fd0690bb0
"serial: pl011: implement workaround for CTS clear event issue"
so delete it.
Cc: Rajanikanth H.V <rajanikanth.hv@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The dereference should be moved below the NULL test.
spatch with a semantic match is used to found this.
(http://coccinelle.lip6.fr/)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Request pins using pinctrl framework. Only show a warning
on error as some boards set the pins in the bootloader
even if CONFIG_PINCTRL is enabled.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
OMAP Architecture code, passes a few function
pointers for UART driver to use in order to
properly implement Power Management and Wakeup
capabilities.
The problem is that those function pointers,
which are passed (ab)using platform_data on
non-DT kernels, can't be passed down to drivers
through DT.
commit e5b57c0 (serial: omap: define helpers
for pdata function pointers) failed to take DT
kernels into consideration and caused a regression
to DT kernel boot.
Fix that by (re-)adding a check for valid pdata
pointer together with valid pdata->$FUNCTION
pointer.
Reported-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Covers the rest of the uses of pci error handler.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
when rebasing patches on top of Greg's tty-next,
it looks like automerge broke a few things which
I didn't catch (for whatever reason I didn't
have OMAP Serial enabled on .config) so I ended
up breaking the build on Greg's tty-next branch.
Fix the breakage by re-adding the three missing
members on struct uart_omap_port.
Reported-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Added tty_device_create_release() and bound to dev->release in
tty_register_device_attr().
Added tty_port_register_device_attr() and used in uart_add_one_port()
instead of tty_register_device_attr().
Signed-off-by: Tomas Hlavacek <tmshlvck@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Added file /sys/devices/.../tty/ttySX/uartclk to allow reading
uartclk value in struct uart_port in serial_core via sysfs.
tty_register_device() has been generalized and refactored in order
to add support for setting drvdata and attribute_group to the device.
Signed-off-by: Tomas Hlavacek <tmshlvck@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixes these build errors:
In file included from drivers/tty/serial/sccnxp.c:20:0:
include/linux/serial_core.h: In function 'uart_handle_break':
include/linux/serial_core.h:543:30: error: dereferencing pointer to incomplete type
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We call the get_device() in the mxs_auart_probe().
For the balance of the reference count, we should put the
device in the mxs_auart_remove().
Signed-off-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
After set the AUART_CTRL0_CLKGATE, the UART will gate all the clocks off.
So the following line will not take effect.
................................................................
writel(AUART_INTR_RXIEN | AUART_INTR_RTIEN | AUART_INTR_CTSMIEN,
u->membase + AUART_INTR_CLR);
................................................................
To fix this issue, the patch moves this gate-off line to
the end of setting registers.
Signed-off-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sizeof when applied to a pointer typed expression gives the
size of the pointer.
Generated by: scripts/coccinelle/misc/noderef.cocci
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
enable RX FIFO for 16 characters and TX FIFO
for 16 spaces.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
nobody needs to access the uart_omap_port structure
other than omap-serial.c file. Let's move that
structure definition to the C source file in order
to prevent anyone from accessing our structure.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
this driver doesn't use any from <plat/dmtimer.h>, so
we can remove it without any problems.
This will, however cause a problem because omap-serial.c
was relying on indirect inclusion of <linux/platform_device.h>,
let's fix the issue by including <linux/platform_device.h>
on omap-serial.c as it should be.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Software flow control register bits were not defined correctly.
Also clarify the IXON and IXOFF logic to reflect what userspace wants.
Cc: stable@vger.kernel.org
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
if we would reach serial_omap_get_char() while
Data Ready bit isn't set, we would return from
it without kicking our pm timer. This would mean
we would, eventually, have an unbalanced
pm_runtime_get on our device which would prevent
it from ever sleeping again.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This has been missing from OMAP UART driver
for quite a while and it's simple enough
to implement it.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch unlocks the port lock before calling a serial_core API
and re-acquires the port lock after calling it.
This patch fixes a system freeze issue seen when the serial_core
API uart_write_wakeup() eventually attempts to acquire the port lock
already acquired by omap serial interrupt handler.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Ruchika Kharwar <ruchika@ti.com>
Signed-off-by: Pavan Savoy <pavan_savoy@ti.com>
Signed-off-by: Vijay Badawadagi <bvijay@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
it makes no sense to mark our IRQ handler inline
since it's passed as a function pointer when
enabling the IRQ line.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Two functions:
omap_serial_fill_features_erratas() and
of_get_uart_port_info() are only called from probe().
Marking them as __devinit gives us another
oportunity to free some code after .init.text
is done.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Ruchika Kharwar <ruchika@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pm_runtime_enable() needs to be invoked before
pm_runtime_use_autosuspend(), and
pm_runtime_set_autosuspend_delay() functions.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Ruchika Kharwar <ruchika@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When we're running our hardirq handler, there's
not need to disable IRQs with spin_lock_irqsave()
because IRQs are already disabled. It also makes
no difference if we save or not IRQ flags.
Switch over to simple spin_lock/spin_unlock and
drop the "flags" variable.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
before removing the driver, let's make sure
to force device into a suspended state in order
to conserve power.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
if platform_get_drvdata() returns NULL, that's
quite a nasty bug on the driver which we want to
catch ASAP. Otherwise, that check is hugely
unneeded.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
by the time we call our first pm_runtme_get_sync()
after enable pm_runtime, our resume method might
be called. To avoid problems, we must make sure
that our dev->drvdata is set correctly before
our resume method gets called.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Everytime we're done using our TTY, we want
the pm timer to be reinitilized. By sticking
to pm_runtime_pm_autosuspend() we make sure
that this will always be the case.
The idea behind this patch is to make sure we
will always reinitialize the pm timer so that
we don't fall into a situation where pm_runtime_put()
expires right away (if timer was already about to
expire when we made the call to pm_runtime_put()).
While suspending right away wouldn't cause any
issues, reinitializing the pm timer can help us
avoiding unnecessary context save & restore
operations (which are somewhat expensive) if there's
another read/write/set_termios request coming right
after. IOW, we are trying to make sure UART is still
powered up while it's still under heavy usage.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
since all other IRQ types now do all necessary
checks inside their handlers, transmit_chars()
was the only one left expecting serial_omap_irq()
to check THRE for it. We can move THRE check to
transmit_chars() in order to make serial_omap_irq()
more uniform.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
receive_chars() was getting too big and too difficult
to follow. By splitting it into separate RDI and RSLI
handlers, we have smaller functions which are easy
to understand and only touch the pieces which they need
to touch.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
quite a few changes here, though they are
pretty obvious. In summary we're making sure
to detect which interrupt type we need to
handle before calling the underlying interrupt
handling procedure.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The current support is known to be broken and
a later patch will come re-adding it using
dma engine API.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The driver doesn't need to know about its platform_device.
Everything the driver needs can be done through the
struct device pointer. In case we need to use the
OMAP-specific PM function pointers, those can make
sure to find the device's platform_device pointer
so they can find the struct omap_device through
pdev->archdata field.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
These were reported in bugzilla long ago with a hack patch. Now we have a
proper patch for one we can do the rest.
Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=25102
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In most of the time, the driver needs to check if the cts flow control
is enabled. But now, the driver checks the ASYNC_CTS_FLOW flag manually,
which is not a grace way. So add a new wraper function to make the code
tidy and clean.
Signed-off-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
this patch is in preparation to a few other changes
which will align on the prototype for function
pointers passed through pdata.
It also helps cleaning up the driver a little by
agregating checks for pdata in a single location.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
current code only works because struct uart_port
is the first member on the uart_omap_port structure.
If, for whatever reason, someone puts another
member as the first of the structure, that cast
won't work anymore. In order to be safe, let's use
a container_of() which, for now, gets optimized into
a cast anyway.
Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch adds note about migration to driver SCCNXP in the code
of driver SC26XX and in MIPS SNI board initialization with example.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This driver is a replacement for a SC26XX driver with a lot of
improvements and new features.
The main differences from the SC26XX driver:
- Removed dependency on MIPS. Driver can be used on any platform.
- Added support for SCC2681, SCC2691, SCC2692, SC28L91, SC28L92,
SC28L202, SCC68681 and SCC68692 ICs.
- Using devm_-related functions.
- Improved error handling of serial port, improved FIFO handling.
- Ability to load multiple instances of drivers.
To avoid the possibility of regression, driver SC26XX left in the
system to confirm the stability of the driver on platforms where
it is being used.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To allow parport_serial to handle the card the same PCI ids are blacklisted
in 8250_pci.c using the existing software blacklist mechanism.
The blacklist array is also renamed because it now covers this new use
case.
Since the two serial ports are auto-detected as XScale instead of 16550A
clones, we also add a quirk to 8250_pci.c to skip autodetection and set the
correct port type.
Signed-off-by: Gianluca Anzolin <gianluca@sottospazio.it>
[Fold in fixes for the uart_8250 change]
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixes the following errors and warnings:
ERROR: trailing whitespace
ERROR: return is not a function, parentheses are not required
WARNING: suspect code indent for conditional statements (32, 36)
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If the order of UART nodes is changed in the device tree, then tty dev
devices are attached to different serial ports causing the console to
be directed to a different physical serial port. The "serial" aliases
in the device tree should prevent this.
This patch ensures that the UART driver creates tty devices that
honour these aliases if a device tree is present.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Matthew Leach <matthew.leach@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This structure might have made sense many years ago, but at this
point it is only used in one specific driver, and referenced in
stale comments elsewhere. Rather than change the sunsu.c driver,
simply move the struct to be within the exclusive domain of that
driver, so it won't get inadvertently picked up and used by other
serial drivers going forward. The comments referencing the now
driver specific struct are updated accordingly.
Note that 8250.c has a struct that is similar in usage, with the
name serial8250_config; but is 100% independent and untouched here.
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The addition of 8250-like entities continues to grow, while this
driver has a snapshot of a select few common 8250 UARTs. So it
has no need to grow with the new additions, since it calls out
its own (largely historic) static list which does not grow.
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The struct serial_uart_config is hardly used at all, and the
use case like this one are somewhat needless. Remove the
trivial usage so that we can remove serial_uart_config.
Since the type field isn't really used at all, we also delete
the initialization and references of it here as well.
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
These error paths are used more often now after deep changes to the
clock code and pinctrl is still new for imx. So help debugging and give
clues in the boot log.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We want them split so that we can call them from setserial functionality
where we copy to/from user space and do the locking, but also from sysfs
where in future we'll want to came them within a sysfs context.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove the clock configuration from imx_setup_ufcr(). This
isn't needed here and will cause garbage output if done.
To be be sure that we only touch the bits we want (TXTL and RXTL)
we have to mask out all other bits of the UFCR register. Add
one non-existing bit macro for this, too (bit 6, DCEDTE on i.MX6).
Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
CC: Shawn Guo <shawn.guo@linaro.org>
CC: Sascha Hauer <s.hauer@pengutronix.de>
CC: Troy Kisky <troy.kisky@boundarydevices.com>
CC: Xinyu Chen <xinyu.chen@freescale.com>
Cc: stable <stable@vger.kernel.org>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The console feature's write routing is unsafe on SMP with
the startup/shutdown call.
There could be several consumers of the console
* the kernel printk
* the init process using /dev/kmsg to call printk to show log
* shell, which open /dev/console and write with sys_write()
The shell goes into the normal uart open/write routing,
but the other two go into the console operations.
The open routing calls imx serial startup, which will write USR1/2
register without any lock and critical with imx_console_write call.
Add a spin_lock for startup/shutdown/console_write routing.
This patch is a port from Freescale's Android kernel.
Signed-off-by: Xinyu Chen <xinyu.chen@freescale.com>
Tested-by: Dirk Behme <dirk.behme@de.bosch.com>
CC: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
devm free functions should not have to be explicitly used.
A semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
@@
(
* devm_kfree(...);
|
* devm_free_irq(...);
|
* devm_iounmap(...);
|
* devm_release_region(...);
|
* devm_release_mem_region(...);
)
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tested on a custom MPC5200B-board using some fancy industrial protocol.
Verified that MPC512x has identical bits, so should work there as well.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There is no reason to explicitly call devm_kfree
in probe or remove functions.
Signed-off-by: Emil Goode <emilgoode@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The gpiochip_remove function may fail to remove a gpio_chip
if any GPIOs are still requested. This patch informs the caller
of such a senario.
Sparse is warning because the function prototype has a
__must_check annotation.
Sparse warning:
drivers/tty/serial/max310x.c:1223:18: warning:
ignoring return value of ‘gpiochip_remove’,
declared with attribute warn_unused_result
[-Wunused-result]
Signed-off-by: Emil Goode <emilgoode@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use the wrapper functions, so we can directly pass a struct
platfrom_device.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
the driver's module init and exit functions can be replaced
with module_spi_driver as they do
only spi_register_driver and spi_unregister_driver in module's init and exit
paths.
Signed-off-by: Devendra Naga <develkernel412222@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Clk_prepare_enable and clk_disable_unprepare combine clk_prepare and
clk_enable, and clk_disable and clk_unprepare. The9 make the code more
concise, and ensure that clk_unprepare is called when clk_enable fails.
A simplified version of the semantic patch that introduces calls to these
functions is as follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
expression e;
@@
- clk_prepare(e);
- clk_enable(e);
+ clk_prepare_enable(e);
@@
expression e;
@@
- clk_disable(e);
- clk_unprepare(e);
+ clk_disable_unprepare(e);
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
flush[_delayed]_work_sync() are now spurious. Mark them deprecated
and convert all users to flush[_delayed]_work().
If you're cc'd and wondering what's going on: Now all workqueues are
non-reentrant and the regular flushes guarantee that the work item is
not pending or running on any CPU on return, so there's no reason to
use the sync flushes at all and they're going away.
This patch doesn't make any functional difference.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Mattia Dongili <malattia@linux.it>
Cc: Kent Yoder <key@linux.vnet.ibm.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: Bryan Wu <bryan.wu@canonical.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-wireless@vger.kernel.org
Cc: Anton Vorontsov <cbou@mail.ru>
Cc: Sangbeom Kim <sbkim73@samsung.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Petr Vandrovec <petr@vandrovec.name>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Avi Kivity <avi@redhat.com>
kdb <-> kgdb transitioning does not work properly with this UART
driver because the get character routine loops indefinitely as opposed
to returning NO_POLL_CHAR per the expectation of the KDB I/O driver
API.
The symptom is a kernel hang when trying to switch debug modes.
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Without checking if the auart supports the hardware flow control or not,
the old mxs_auart_set_mctrl() asserted the RTS pin blindly.
This will causes the auart receives wrong data in the following case:
The far-end has already started the write operation, and wait for
the auart asserts the RTS pin. Then the auart starts the read operation,
but mxs_auart_set_mctrl() may be called before we set the RTSCTS in the
mxs_auart_settermios(). So the RTS pin is asserted in a wrong situation,
and we get the wrong data in the end.
This bug has been catched when I connect the mx23(DTE) to the mx53(DCE).
This patch also replaces the AUART_CTRL2_RTS with AUART_CTRL2_RTSEN.
We should use the real the hardware flow control, not the software-controled
hardware flow control.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This driver is a replacement for a MAX3107 driver with a lot of
improvements and new features.
The main differences from the old version:
- Using the regmap.
- Using devm_XXX-related functions.
- The use of threaded IRQ with IRQF_ONESHOT flag allows the driver to
the hardware that supports only level IRQ.
- Improved error handling of serial port, improved FIFO handling,
improved hardware & software flow control.
- Advanced flags allows turn on RS-485 mode (Auto direction control).
- Ability to load multiple instances of drivers.
- Added support for MAX3108.
- GPIO support.
- Driver is quite ready for adding I2C support and support other ICs
with compatible registers set (MAX3109, MAX14830).
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
OMAP hardware doesn't provide a phyisical DTR line, but
some configurations may need a DTR line which tracks whether
the device is open or not.
So allow a gpio to be configured as the DTR line.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reported by coccinelle:
drivers/tty/serial/pch_uart.c:979:1-14: alloc with no test, possible model on line 994
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch fixes the following compile breakage:
CC drivers/tty/serial/sc26xx.o
drivers/tty/serial/sc26xx.c: In function 'read_sc_port':
drivers/tty/serial/sc26xx.c💯 error: implicit declaration of function 'readb'
drivers/tty/serial/sc26xx.c: In function 'write_sc_port':
drivers/tty/serial/sc26xx.c:105: error: implicit declaration of function 'writeb'
drivers/tty/serial/sc26xx.c: In function 'sc26xx_probe':
drivers/tty/serial/sc26xx.c:652: error: implicit declaration of function 'ioremap_nocache'
drivers/tty/serial/sc26xx.c:652: warning: assignment makes pointer from integer without a cast
make[3]: *** [drivers/tty/serial/sc26xx.o] Error 1
make[2]: *** [drivers/tty/serial] Error 2
make[1]: *** [drivers/tty] Error 2
make: *** [drivers] Error 2
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
So now for those drivers that can use neither tty_port_install nor
tty_port_register_driver but still have tty_port available before
tty_register_driver we use newly added tty_port_link_device.
The rest of the drivers that still do not provide tty_struct <->
tty_port link will have to be converted to implement
tty->ops->install.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This looks like it was a mistake not to create device nodes for these
drivers. Let us create them from now on.
It will be necessary to call tty_register_device some way, either by
tty_register_driver implicitly or to call tty_register_device proper.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: netdev@vger.kernel.org
Cc: linux390@de.ibm.com
Cc: linux-s390@vger.kernel.org
Cc: linux-cris-kernel@axis.com
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Currently we have no way to assign tty->port while performing tty
installation. There are two ways to provide the link tty_struct =>
tty_port. Either by calling tty_port_install from tty->ops->install or
tty_port_register_device called instead of tty_register_device when
the device is being set up after connected.
In this patch we modify most of the drivers to do the latter. When the
drivers use tty_register_device and we have tty_port already, we
switch to tty_port_register_device. So we have the tty_struct =>
tty_port link for free for those.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
tty_struct->termios is no longer a pointer. This was changed recently
by "tty: move the termios object into the tty". But 68328serial was
not changed, so we now have a compilation error:
68328serial.c: In function 'change_speed':
68328serial.c:518:22: error: invalid type argument of '->' (have 'struct ktermios')
68328serial.c: In function 'rs_set_ldisc':
68328serial.c:620:31: error: invalid type argument of '->' (have 'struct ktermios')
68328serial.c: In function 'rs_set_termios':
68328serial.c:988:20: error: invalid type argument of '->' (have 'struct ktermios')
Fix that now.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This trivial patch adds a short description for SERIAL_CLPS711X Kconfig
entry, removes excess dependence on the ARM-platform (this is done
globally for the platform), allows the driver to be compiled by default
and removes unnecessary description about GRUB and LILO, because these
bootloaders do not supported this platform.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Masanari Iida