Commit Graph

166 Commits

Author SHA1 Message Date
Greg Kroah-Hartman b2e312061c First round of IIO fixes for the 4.14 cycle
Note this includes fixes from recent merge window.  As such the tree
 is based on top of a prior staging/staging-next tree.
 
 * iio core
   - return and error for a failed read_reg debugfs call rather than
     eating the error.
 * ad7192
   - Use the dedicated reset function in the ad_sigma_delta library
     instead of an spi transfer with the data on the stack which
     could cause problems with DMA.
 * ad7793
   - Implement a dedicate reset function in the ad_sigma_delta library
     and use it to correctly reset this part.
 * bme280
   - ctrl_reg write must occur after any register writes
   for updates to take effect.
 * mcp320x
   - negative voltage readout was broken.
   - Fix an oops on module unload due to spi_set_drvdata not being called
     in probe.
 * st_magn
   - Fix the data ready line configuration for the lis3mdl. It is not
     configurable so the st_magn core was assuming it didn't exist
     and so wasn't consuming interrupts resulting in an unhandled
     interrupt.
 * stm32-adc
   - off by one error on max channels checking.
 * stm32-timer
   - preset should not be buffered - reorganising register writes avoids
   this.
   - fix a corner case in which write preset goes wrong when a timer is
   used first as a trigger then as a counter with preset. Odd case but
   you never know.
 * ti-ads1015
   - Fix setting of comparator polarity by fixing bitfield definition.
 * twl4030
   - Error path handling fix to cleanup in event of regulator
     registration failure.
   - Disable the vusb3v1 regulator correctly in error handling
   - Don't paper over a regulator enable failure.
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Merge tag 'iio-fixes-for-4.14a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

First round of IIO fixes for the 4.14 cycle

Note this includes fixes from recent merge window.  As such the tree
is based on top of a prior staging/staging-next tree.

* iio core
  - return and error for a failed read_reg debugfs call rather than
    eating the error.
* ad7192
  - Use the dedicated reset function in the ad_sigma_delta library
    instead of an spi transfer with the data on the stack which
    could cause problems with DMA.
* ad7793
  - Implement a dedicate reset function in the ad_sigma_delta library
    and use it to correctly reset this part.
* bme280
  - ctrl_reg write must occur after any register writes
  for updates to take effect.
* mcp320x
  - negative voltage readout was broken.
  - Fix an oops on module unload due to spi_set_drvdata not being called
    in probe.
* st_magn
  - Fix the data ready line configuration for the lis3mdl. It is not
    configurable so the st_magn core was assuming it didn't exist
    and so wasn't consuming interrupts resulting in an unhandled
    interrupt.
* stm32-adc
  - off by one error on max channels checking.
* stm32-timer
  - preset should not be buffered - reorganising register writes avoids
  this.
  - fix a corner case in which write preset goes wrong when a timer is
  used first as a trigger then as a counter with preset. Odd case but
  you never know.
* ti-ads1015
  - Fix setting of comparator polarity by fixing bitfield definition.
* twl4030
  - Error path handling fix to cleanup in event of regulator
    registration failure.
  - Disable the vusb3v1 regulator correctly in error handling
  - Don't paper over a regulator enable failure.
2017-09-25 10:58:22 +02:00
Colin Parker 4b1f0c31f9 IIO: BME280: Updates to Humidity readings need ctrl_reg write!
The ctrl_reg register needs to be written after any write to
the humidity registers. The value written to the ctrl_reg register
does not necessarily need to change, but a write operation must
occur.

The regmap_update_bits functions will not write to a register
if the register value matches the value to be written. This saves
unnecessary bus operations.  The change in this patch forces a bus
write during the chip_config operation by switching to
regmap_write_bits.

This will fix issues where the Humidity Sensor Oversampling bits
are not updated after initialization.

Signed-off-by: Colin Parker <colin.parker@aclima.io>
Acked-by: Andreas Klinger <ak@it-klinger.de>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-09-24 16:58:14 +01:00
Greg Kroah-Hartman 8439a69e72 Merge 4.13-rc7 into staging-next
We want the staging and iio fixes in here to handle the merge issues.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-08-28 15:26:48 +02:00
Greg Kroah-Hartman 5e47adb906 Second set of IIO new device support, features and cleanup for the 4.14 cycle.
New device support:
 * ak8974
   - support the AMI306.
 * st_magnetometer
   - add support for the LIS2MDL with bindings.
 * rockchip-saradc
   - add binding for rv1108 SoC (no driver change).
 * srf08
   - add srf02 (i2c only) and srf10 support.
 * stm32-timer
   - support for the STM32H7 to existing driver.
 
 Features:
 * tools
   - move over to the tools buildsystem rather than hand rolling.
   - add an install section to the build.
 * ak8974
   - use serial number to add device randomness.
   - add AMI306 calibration data output.
 * ccs811
   - triggered buffer support.
 * srf08
   - add a device tree table as the old style i2c probing is going away,
   - add triggered buffer support
 * st32-adc
   - add optional st,min-sample-time-nsecs binding to allow control of
     sampling against analog circuitry.
 * stm32-timer
   - add output compare triggers.
 * ti-ads1015
   - add threshold event support.
 * ti-ads7950
   - Allow use on ACPI platforms including providing a default reference
     voltage as there is no way to obtain this on ACPI currently.
 
 Cleanup and fixes:
 * ad7606
   - fix an error return code in probe.
 * ads1015
   - fix incorrect data rate setting update when capture in progress,
   - fix wrong scale information for the ADS1115,
   - make conversions work when CONFIG_PM is not set,
   - make sure we don't get a stale result after a runtime resume by
     ensuring we wait long enough,
   - avoid returning a false error form the buffer setup callbacks,
   - add enough wait time to get the correct conversion,
   - remove an unnecessary config register update,
   - add a helper to set conversion mode reducing repeated boilerplate,
   - use devm_iio_triggered_buffer_setup to simplify error and remove
     paths,
   - use iio_device_claim_direct_mode instead of opencoding the same.
 * ak8974
   - mark the INT_CLEAR register as precious to prevent debugfs access.
 * apds9300
   - constify the i2c_device_id.
 * at91-sama5 adc
   - add missing Kconfig dependency.
 * bma180 accel
   - constify the i2c_device_id.
 * rockchip_saradc
   - explicitly request exclusive reset control as part of the reset rework
     on going throughout the kernel.
 * st_accel
   - fix drdy configuration for a load of accelerometers that only have
     the int1 line.  Fix is unimportant as presumably no deviec tree actually
     used the non existent hardware line.
 * st_pressure
   - fix drdy configuration for LPS22HB and LPS25H by dropping int2 support
     as they don't have this. Fix is unimportant as presumably no device tree
     actually used the non existent hardware line.
 * stm32-dac
   - explicitly request exclusive reset control (part of reset being reworked).
 * tsl2583
   - constify the i2c_device_id.
 * xadc
   - coding style fixes.
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Merge tag 'iio-for-4.14b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Second set of IIO new device support, features and cleanup for the 4.14 cycle.

New device support:
* ak8974
  - support the AMI306.
* st_magnetometer
  - add support for the LIS2MDL with bindings.
* rockchip-saradc
  - add binding for rv1108 SoC (no driver change).
* srf08
  - add srf02 (i2c only) and srf10 support.
* stm32-timer
  - support for the STM32H7 to existing driver.

Features:
* tools
  - move over to the tools buildsystem rather than hand rolling.
  - add an install section to the build.
* ak8974
  - use serial number to add device randomness.
  - add AMI306 calibration data output.
* ccs811
  - triggered buffer support.
* srf08
  - add a device tree table as the old style i2c probing is going away,
  - add triggered buffer support
* st32-adc
  - add optional st,min-sample-time-nsecs binding to allow control of
    sampling against analog circuitry.
* stm32-timer
  - add output compare triggers.
* ti-ads1015
  - add threshold event support.
* ti-ads7950
  - Allow use on ACPI platforms including providing a default reference
    voltage as there is no way to obtain this on ACPI currently.

Cleanup and fixes:
* ad7606
  - fix an error return code in probe.
* ads1015
  - fix incorrect data rate setting update when capture in progress,
  - fix wrong scale information for the ADS1115,
  - make conversions work when CONFIG_PM is not set,
  - make sure we don't get a stale result after a runtime resume by
    ensuring we wait long enough,
  - avoid returning a false error form the buffer setup callbacks,
  - add enough wait time to get the correct conversion,
  - remove an unnecessary config register update,
  - add a helper to set conversion mode reducing repeated boilerplate,
  - use devm_iio_triggered_buffer_setup to simplify error and remove
    paths,
  - use iio_device_claim_direct_mode instead of opencoding the same.
* ak8974
  - mark the INT_CLEAR register as precious to prevent debugfs access.
* apds9300
  - constify the i2c_device_id.
* at91-sama5 adc
  - add missing Kconfig dependency.
* bma180 accel
  - constify the i2c_device_id.
* rockchip_saradc
  - explicitly request exclusive reset control as part of the reset rework
    on going throughout the kernel.
* st_accel
  - fix drdy configuration for a load of accelerometers that only have
    the int1 line.  Fix is unimportant as presumably no deviec tree actually
    used the non existent hardware line.
* st_pressure
  - fix drdy configuration for LPS22HB and LPS25H by dropping int2 support
    as they don't have this. Fix is unimportant as presumably no device tree
    actually used the non existent hardware line.
* stm32-dac
  - explicitly request exclusive reset control (part of reset being reworked).
* tsl2583
  - constify the i2c_device_id.
* xadc
  - coding style fixes.
2017-08-20 10:42:42 -07:00
Greg Kroah-Hartman 8652892ed4 Merge 4.13-rc5 into staging-next
We need it here for iio fixes.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-08-14 13:35:22 -07:00
Lorenzo Bianconi ef0bc2e839 iio: pressure: st_pressure: fix drdy configuration for LPS22HB and LPS25H
Remove int2 configuration parameter for LPS22HB and LPS25H since
these devices export just int1 as data-ready line

Fixes: 931878405b (iio:pressure: Add support for LPS25H pressure sensor)
Fixes: e039e2f5b4 (iio:st_pressure:initial lps22hb sensor support)
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-08-12 13:46:32 +01:00
Andreas Klinger eb92b4183d iio: bmp280: properly initialize device for humidity reading
If the device is not initialized at least once it happens that the humidity
reading is skipped, which means the special value 0x8000 is delivered.

For omitting this case the oversampling of the humidity must be set before
the oversampling of the temperature und pressure is set as written in the
datasheet of the BME280.

Furthermore proper error detection is added in case a skipped value is read
from the device. This is done also for pressure and temperature reading.
Especially it don't make sense to compensate this value and treat it as
regular value.

Signed-off-by: Andreas Klinger <ak@it-klinger.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-07-30 14:41:12 +01:00
Greg Kroah-Hartman 055655a9f0 First set of IIO fixes for the 4.13 cycle.
* ad2s1210
   - Fix negative angular velocity reads (identified by a gcc 7 warning)
 * aspeed-adc
   - Wait for initialization sequence to finish before enabling channels.
   Without it no channels work.
 * axp288
   - Revert a patch that dropped some bogus register mods.  No one is entirely
   sure why but it breaks charging on some devices.
   - Fix GPADC pin read returning 0. Turns out a small sleep is needed.
 * bmc150
   - Make sure device is restored to normal state after suspend / resume
   cycle.  Otherwise, simple sysfs reads are broken.
 * tsl2563
   - fix wrong event code.
 * st-accel
   - add spi 3-wire support. Needed to fix the lsm303agr accelerometer
   which only had 3 wires in all cases.  Side effect is to enable optional
   3-wire support for other devices.
 * st-pressure
   - disable multiread by default for LPS22HB (only effects SPI)
 * sun4i-gpadc-iio
   - fix unbalanced irq enable / disable
 * vf610
   - Fix VALT slection for REFSEL bits - ensures we are using the
   right reference pins.
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Merge tag 'iio-fixes-for-4.13a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

First set of IIO fixes for the 4.13 cycle.

* ad2s1210
  - Fix negative angular velocity reads (identified by a gcc 7 warning)
* aspeed-adc
  - Wait for initialization sequence to finish before enabling channels.
  Without it no channels work.
* axp288
  - Revert a patch that dropped some bogus register mods.  No one is entirely
  sure why but it breaks charging on some devices.
  - Fix GPADC pin read returning 0. Turns out a small sleep is needed.
* bmc150
  - Make sure device is restored to normal state after suspend / resume
  cycle.  Otherwise, simple sysfs reads are broken.
* tsl2563
  - fix wrong event code.
* st-accel
  - add spi 3-wire support. Needed to fix the lsm303agr accelerometer
  which only had 3 wires in all cases.  Side effect is to enable optional
  3-wire support for other devices.
* st-pressure
  - disable multiread by default for LPS22HB (only effects SPI)
* sun4i-gpadc-iio
  - fix unbalanced irq enable / disable
* vf610
  - Fix VALT slection for REFSEL bits - ensures we are using the
  right reference pins.
2017-07-23 20:54:31 -07:00
Joe Perches eed3089fb2 iio: pressure: zpa2326: Add newlines to logging macros
Add newlines to the macro definitions and use a more common style.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-06 19:28:28 +01:00
Lorenzo Bianconi 2ff59bf39b iio: pressure: st_pressure_spi: add OF capability to st_pressure_spi
Add device tree support for LPS22HB, LPS25H, LPS331AP, LPS001WP
pressure sensors

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-02 10:24:58 +01:00
Manivannan Sadhasivam 1813c71317 iio: pressure: ms5637: Add OF match table
Add of_match_table for Measurement-Specialties MS5637, MS5805, MS5837 and MS8607 pressure & temperature sensor

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-01 10:16:59 +01:00
Lorenzo Bianconi 250bbbdbed iio: common: st_sensors: move st_sensors_of_i2c_probe() in common code
Move st_sensors_of_i2c_probe() in st_sensors_core and rename it in
st_sensors_of_name_probe(). That change is necessary to add device-tree
support in spi code otherwise the rest of the autodetection will fail
since spi->modalias (and indio_dev->name) will be set using compatible
string value that differs from standard sensor name

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-07-01 10:16:56 +01:00
Lorenzo Bianconi add6e6ab3e iio: pressure: st_pressure_core: disable multiread by default for LPS22HB
Set multiread variable to false for LPS22HB pressure sensor since
it is already enabled in CTRL_REG2. Previous configuration does not
cause any issue in I2C communication since SUB Msb has no meaning
whereas it breaks register address in SPI communication

Fixes: e039e2f5b4 (iio:st_pressure:initial lps22hb sensor support)
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-06-24 20:46:25 +01:00
Nicholas Mc Guire e7215fe4d5 iio: pressure: zpa2326: report interrupted case as failure
If the timeout-case prints a warning message then probably the interrupted
case should also. Further, wait_for_completion_interruptible_timeout()
returns long not int.

Fixes: commit 03b262f2bb ("iio:pressure: initial zpa2326 barometer support")
Signed-off-by: Nicholas Mc Guire <der.herr@hofr.at>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-05-14 15:28:14 +01:00
Shrirang Bagul 7383d44b84 iio: st_pressure: st_accel: Initialise sensor platform data properly
This patch fixes the sensor platform data initialisation for st_pressure
and st_accel device drivers. Without this patch, the driver fails to
register the sensors when the user removes and re-loads the driver.

1. Unload the kernel modules for st_pressure
$ sudo rmmod st_pressure_i2c
$ sudo rmmod st_pressure

2. Re-load the driver
$ sudo insmod st_pressure
$ sudo insmod st_pressure_i2c

Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
2017-04-26 06:37:53 +01:00
Peter Meerwald-Stadler 9a043b0bf2 iio: pressure: Fix name of BME280 part in Kconfig
Bosch BME280 is a combined pressure and humidity sensor

Signed-off-by: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-04-23 12:38:47 +01:00
Greg Kroah-Hartman df47c0a638 Fifth set of IIO fixes for the 4.11 cycle.
As these are rather late in the cycle, they may sneak over into 4.12.
 There is a fix for a regression caused by another fix (hid sensors
 hardware seems to vary a lot in how various corner cases are handled).
 
 * ad7303
   - fix channel description. Numeric values were being passed as characters
   presumably leading to garbage from the userspace interface.
 * as3935
   - the write data macro was wrong so fix it.
 * bmp280
   - incorrect handling of negative values as being unsigned broke humidity
   calculation.
 * hid-sensor
   - Restore the poll and hysteresis values after resume as some hardware
   doesn't do it.
 * stm32-trigger
   - buglet in reading the sampling frequency
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Merge tag 'iio-fixes-for-4.11e' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Fifth set of IIO fixes for the 4.11 cycle.

As these are rather late in the cycle, they may sneak over into 4.12.
There is a fix for a regression caused by another fix (hid sensors
hardware seems to vary a lot in how various corner cases are handled).

* ad7303
  - fix channel description. Numeric values were being passed as characters
  presumably leading to garbage from the userspace interface.
* as3935
  - the write data macro was wrong so fix it.
* bmp280
  - incorrect handling of negative values as being unsigned broke humidity
  calculation.
* hid-sensor
  - Restore the poll and hysteresis values after resume as some hardware
  doesn't do it.
* stm32-trigger
  - buglet in reading the sampling frequency
2017-04-18 19:38:38 +02:00
Andreas Klinger ed3730c435 IIO: bmp280-core.c: fix error in humidity calculation
While calculating the compensation of the humidity there are negative values
interpreted as unsigned because of unsigned variables used.  These values as
well as the constants need to be casted to signed as indicated by the
documentation of the sensor.

Signed-off-by: Andreas Klinger <ak@it-klinger.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Matt Ranostay <matt.ranostay@konsulko.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-04-14 16:54:49 +01:00
Greg Kroah-Hartman f78a8236c6 Merge 4.11-rc6 into staging-next
We want the staging and iio fixes in here to handle merging easier.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-10 15:21:55 +02:00
Shrirang Bagul 51f528a163 iio: st_pressure: initialize lps22hb bootime
This patch initializes the bootime in struct st_sensor_settings for
lps22hb sensor. Without this, sensor channels read from sysfs always
report stale values.

Signed-off-by: Shrirang Bagul <shrirang.bagul@canonical.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-04-02 10:18:41 +01:00
simran singhal af873b0d8f iio: pressure: zpa2326: Remove unnecessary cast on void pointer
The following Coccinelle script was used to detect this:
@r@
expression x;
void* e;
type T;
identifier f;
@@
(
  *((T *)e)
|
  ((T *)x)[...]
|
  ((T*)x)->f
|
- (T*)
  e
)

Signed-off-by: simran singhal <singhalsimran0@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-04-02 09:52:18 +01:00
Javier Martinez Canillas 77496c078c iio: pressure: mpl3115: Add OF device ID table
The driver doesn't have a struct of_device_id table but supported devices
are registered via Device Trees. This is working on the assumption that a
I2C device registered via OF will always match a legacy I2C device ID and
that the MODALIAS reported will always be of the form i2c:<device>.

But this could change in the future so the correct approach is to have an
OF device ID table if the devices are registered via OF.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-03-19 10:58:01 +00:00
Javier Martinez Canillas 72fc0270a9 iio: pressure: hp03: Add OF device ID table
The driver doesn't have a struct of_device_id table but supported devices
are registered via Device Trees. This is working on the assumption that a
I2C device registered via OF will always match a legacy I2C device ID and
that the MODALIAS reported will always be of the form i2c:<device>.

But this could change in the future so the correct approach is to have an
OF device ID table if the devices are registered via OF.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-03-19 10:53:39 +00:00
Greg Kroah-Hartman b96dea60bc First set of IIO fixes for the 4.11 cycle. Regression fixes from 4.10.
These are fixes that came in just to late for the 4.10 cycle.
 
 Two drivers made an accidental assumption of structure arrangement for
 struct iio_dev that are no longer true.  It was a typo in the first place
 that happened to work until some elements were added to the structure.
 
 * mpl3115
   - don't rely on structure field ordering
 * mpl115
   - don't rely on structure field ordering.
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Merge tag 'iio-fixes-for-4.11a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

First set of IIO fixes for the 4.11 cycle. Regression fixes from 4.10.

These are fixes that came in just to late for the 4.10 cycle.

Two drivers made an accidental assumption of structure arrangement for
struct iio_dev that are no longer true.  It was a typo in the first place
that happened to work until some elements were added to the structure.

* mpl3115
  - don't rely on structure field ordering
* mpl115
  - don't rely on structure field ordering.
2017-02-11 16:46:03 +01:00
Peter Rosin 6a6e1d56a0 iio: pressure: mpl115: do not rely on structure field ordering
Fixes a regression triggered by a change in the layout of
struct iio_chan_spec, but the real bug is in the driver which assumed
a specific structure layout in the first place. Hint: the three bits were
not OR:ed together as implied by the indentation prior to this patch,
there was a comma between the first two, which accidentally moved the
..._SCALE and ..._OFFSET bits to the next structure field. That field
was .info_mask_shared_by_type before the _available attributes was added
by commit 5123960007 ("iio:core: add a callback to allow drivers to
provide _available attributes") and .info_mask_separate_available
afterwards, and the regression happened.

info_mask_shared_by_type is actually a better choice than the originally
intended info_mask_separate for the ..._SCALE and ..._OFFSET bits since
a constant is returned from mpl115_read_raw for the scale/offset. Using
info_mask_shared_by_type also preserves the behavior from before the
regression and is therefore less likely to cause other interesting side
effects.

The above mentioned regression causes unintended sysfs attibutes to
show up that are not backed by code, in turn causing a NULL pointer
defererence to happen on access.

Fixes: 3017d90e89 ("iio: Add Freescale MPL115A2 pressure / temperature sensor driver")
Fixes: 5123960007 ("iio:core: add a callback to allow drivers to provide _available attributes")
Signed-off-by: Peter Rosin <peda@axentia.se>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-02-11 09:00:44 +00:00
Peter Rosin 9cf6cdba58 iio: pressure: mpl3115: do not rely on structure field ordering
Fixes a regression triggered by a change in the layout of
struct iio_chan_spec, but the real bug is in the driver which assumed
a specific structure layout in the first place. Hint: the two bits were
not OR:ed together as implied by the indentation prior to this patch,
there was a comma between them, which accidentally moved the ..._SCALE
bit to the next structure field. That field was .info_mask_shared_by_type
before the _available attributes was added by commit 5123960007
("iio:core: add a callback to allow drivers to provide _available
attributes") and .info_mask_separate_available afterwards, and the
regression happened.

info_mask_shared_by_type is actually a better choice than the originally
intended info_mask_separate for the ..._SCALE bit since a constant is
returned from mpl3115_read_raw for the scale. Using
info_mask_shared_by_type also preserves the behavior from before the
regression and is therefore less likely to cause other interesting side
effects.

The above mentioned regression causes an unintended sysfs attibute to
show up that is not backed by code, in turn causing the following NULL
pointer defererence to happen on access.

Segmentation fault

Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = ecc3c000
[00000000] *pgd=87f91831
Internal error: Oops: 80000007 [#1] SMP ARM
Modules linked in:
CPU: 1 PID: 1051 Comm: cat Not tainted 4.10.0-rc5-00009-gffd8858-dirty #3
Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
task: ed54ec00 task.stack: ee2bc000
PC is at 0x0
LR is at iio_read_channel_info_avail+0x40/0x280
pc : [<00000000>]    lr : [<c06fbc1c>]    psr: a0070013
sp : ee2bdda8  ip : 00000000  fp : ee2bddf4
r10: c0a53c74  r9 : ed79f000  r8 : ee8d1018
r7 : 00001000  r6 : 00000fff  r5 : ee8b9a00  r4 : ed79f000
r3 : ee2bddc4  r2 : ee2bddbc  r1 : c0a86dcc  r0 : ee8d1000
Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
Control: 10c5387d  Table: 3cc3c04a  DAC: 00000051
Process cat (pid: 1051, stack limit = 0xee2bc210)
Stack: (0xee2bdda8 to 0xee2be000)
dda0:                   ee2bddc0 00000002 c016d720 c016d394 ed54ec00 00000000
ddc0: 60070013 ed413780 00000001 edffd480 ee8b9a00 00000fff 00001000 ee8d1018
dde0: ed79f000 c0a53c74 ee2bde0c ee2bddf8 c0513c58 c06fbbe8 edffd480 edffd540
de00: ee2bde3c ee2bde10 c0293474 c0513c40 c02933e4 ee2bde60 00000001 ed413780
de20: 00000001 ed413780 00000000 edffd480 ee2bde4c ee2bde40 c0291d00 c02933f0
de40: ee2bde9c ee2bde50 c024679c c0291ce0 edffd4b0 b6e37000 00020000 ee2bdf78
de60: 00000000 00000000 ed54ec00 ed013200 00000817 c0a111fc edffd540 ed413780
de80: b6e37000 00020000 00020000 ee2bdf78 ee2bded4 ee2bdea0 c0292890 c0246604
dea0: c0117940 c016ba50 00000025 c0a111fc b6e37000 ed413780 ee2bdf78 00020000
dec0: ee2bc000 b6e37000 ee2bdf44 ee2bded8 c021d158 c0292770 c0117764 b6e36004
dee0: c0f0d7c4 ee2bdfb0 b6f89228 00021008 ee2bdfac ee2bdf00 c0101374 c0117770
df00: 00000000 00000000 ee2bc000 00000000 ee2bdf34 ee2bdf20 c016ba04 c0171080
df20: 00000000 00020000 ed413780 b6e37000 00000000 ee2bdf78 ee2bdf74 ee2bdf48
df40: c021e7a0 c021d130 c023e300 c023e280 ee2bdf74 00000000 00000000 ed413780
df60: ed413780 00020000 ee2bdfa4 ee2bdf78 c021e870 c021e71c 00000000 00000000
df80: 00020000 00020000 b6e37000 00000003 c0108084 00000000 00000000 ee2bdfa8
dfa0: c0107ee0 c021e838 00020000 00020000 00000003 b6e37000 00020000 0001a2b4
dfc0: 00020000 00020000 b6e37000 00000003 7fffe000 00000000 00000000 00020000
dfe0: 00000000 be98eb4c 0000c740 b6f1985c 60070010 00000003 00000000 00000000
Backtrace:
[<c06fbbdc>] (iio_read_channel_info_avail) from [<c0513c58>] (dev_attr_show+0x24/0x50)
 r10:c0a53c74 r9:ed79f000 r8:ee8d1018 r7:00001000 r6:00000fff r5:ee8b9a00
 r4:edffd480
[<c0513c34>] (dev_attr_show) from [<c0293474>] (sysfs_kf_seq_show+0x90/0x110)
 r5:edffd540 r4:edffd480
[<c02933e4>] (sysfs_kf_seq_show) from [<c0291d00>] (kernfs_seq_show+0x2c/0x30)
 r10:edffd480 r9:00000000 r8:ed413780 r7:00000001 r6:ed413780 r5:00000001
 r4:ee2bde60 r3:c02933e4
[<c0291cd4>] (kernfs_seq_show) from [<c024679c>] (seq_read+0x1a4/0x4e0)
[<c02465f8>] (seq_read) from [<c0292890>] (kernfs_fop_read+0x12c/0x1cc)
 r10:ee2bdf78 r9:00020000 r8:00020000 r7:b6e37000 r6:ed413780 r5:edffd540
 r4:c0a111fc
[<c0292764>] (kernfs_fop_read) from [<c021d158>] (__vfs_read+0x34/0x118)
 r10:b6e37000 r9:ee2bc000 r8:00020000 r7:ee2bdf78 r6:ed413780 r5:b6e37000
 r4:c0a111fc
[<c021d124>] (__vfs_read) from [<c021e7a0>] (vfs_read+0x90/0x11c)
 r8:ee2bdf78 r7:00000000 r6:b6e37000 r5:ed413780 r4:00020000
[<c021e710>] (vfs_read) from [<c021e870>] (SyS_read+0x44/0x90)
 r8:00020000 r7:ed413780 r6:ed413780 r5:00000000 r4:00000000
[<c021e82c>] (SyS_read) from [<c0107ee0>] (ret_fast_syscall+0x0/0x1c)
 r10:00000000 r8:c0108084 r7:00000003 r6:b6e37000 r5:00020000 r4:00020000
Code: bad PC value
---[ end trace 9c4938ccd0389004 ]---

Fixes: cc26ad455f ("iio: Add Freescale MPL3115A2 pressure / temperature sensor driver")
Fixes: 5123960007 ("iio:core: add a callback to allow drivers to provide _available attributes")
Reported-by: Ken Lin <ken.lin@advantech.com>
Tested-by: Ken Lin <ken.lin@advantech.com>
Signed-off-by: Peter Rosin <peda@axentia.se>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-02-11 09:00:20 +00:00
Gwendal Grignou d732248fdb iio: cros_ec: Add cros_ec barometer driver
Handle the barometer sensor presented by the ChromeOS EC Sensor hub.

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Signed-off-by: Enric Balletbo Serra <enric.balletbo@collabora.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-28 15:07:46 +00:00
Alison Schofield 3bc1abcddb iio: pressure: ms5611: claim direct mode during oversampling changes
Driver was checking for direct mode before changing oversampling
ratios, but was not locking it.  Use the claim/release helper
functions to guarantee the device stays in direct mode while the
oversampling ratios are being updated.  Continue to use the drivers
private state lock to protect against conflicting direct mode access
of the state data.

Signed-off-by: Alison Schofield <amsfield22@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2017-01-21 12:31:05 +00:00
Marcin Niestroj 7f0d874036 iio: st_pressure: Export sampling frequency for lps25h and lps331ap
Both devices are using the same iio_chan_spec to define which settings
are exported with sysfs. Both are properly configured to set/get
sampling frequency for pressure and temperature. They also properly
export available sampling frequencies. The only missing thing is
sampling_frequency sysfs file, which allows to set/get this property
from userspace.

Add sampling frequency to iio channel info mask, so sampling_frequency
file is properly exported using sysfs.

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-12-30 11:33:56 +00:00
Marcin Niestroj 1b211d48ab iio: st_pressure: Fix data sign
Datasheet of each device (lps331ap, lps25h, lps001wp, lps22hb) says that
the pressure and temperature data is a 2's complement.

I'm sending this the slow way, as negative pressures on these are pretty
unusual and the nature of the fixing of multiple device introduction patches
will make it hard to apply to older kernels - Jonathan.

Fixes: 217494e5b7 ("iio:pressure: Add STMicroelectronics pressures driver")
Fixes: 2f5effcbd0 ("iio: pressure-core: st: Expand and rename LPS331AP's channel descriptor")
Fixes: 7885a8ce68 ("iio: pressure: st: Add support for new LPS001WP pressure sensor")
Fixes: e039e2f5b4 ("iio:st_pressure:initial lps22hb sensor support")
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-12-30 11:31:16 +00:00
Aniroop Mathur 071cf24943 IIO: Change msleep to usleep_range for small msecs
msleep(1~20) may not do what the caller intends, and will often sleep longer.
(~20 ms actual sleep for any value given in the 1~20ms range)
This is not the desired behaviour for many cases like device resume time,
device suspend time, device enable time, data reading time, etc.
Thus, change msleep to usleep_range for precise wakeups.

Signed-off-by: Aniroop Mathur <a.mathur@samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-12-03 08:58:40 +00:00
Shrirang Bagul 9d317724cf iio: st_pressure: Support i2c probe using acpi
Compatible strings are not available on ACPI based systems. This patch adds
support to use DSDT information read from platform BIOS instead for probing
st pressure sensors.

Signed-off-by: Shrirang Bagul <shrirang.bagul@canonical.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-12-03 08:56:27 +00:00
Linus Walleij 91a86a3b89 iio: pressure: st_pressure: inline per-sensor data
We have #defines for all the individual sensor registers and
value/mask pairs #defined at the top of the file and used at
exactly one spot.

This is usually good if the #defines give a meaning to the
opaque magic numbers.

However in this case, the semantic meaning is inherent in the
name of the C99-addressable fields, and that means duplication
of information, and only makes the code hard to maintain since
you every time have to add a new #define AND update the site
where it is to be used.

Get rid of the #defines and just open code the values into the
appropriate struct elements. Make sure to explicitly address
the .hz and .value fields in the st_sensor_odr_avl struct
so that the meaning of all values is clear.

This patch is purely syntactic should have no semantic effect.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-11-12 15:50:10 +00:00
Greg Kroah-Hartman c7c88e998a First round of IIO new device support, features and cleanups for the 4.10 cycle.
Fair number of outreachy related patches in here. Some of these may well
 have already been picked up by Greg but git will sort that out for us.
 
 Also some good staging cleanup work from other sources. Thanks Brian and Lars
 in particular for this.
 
 New device support
 * ACCES 104-quad-8
   - New driver for this 8 channel encoder input board. Lots of new ABI with
     this one.
 * AD7766
   - New driver supporting AD7766, AD7766-1, AD7766-2, AD7767, AD7767-1 and
     AD7767-2 24 bit ADCs.
 * dmard 10
   - New driver for this 3 axis accelerometer.
 * Honeywell ABP pressure sensors.
   - New driver covering 56 parts in this series (too many to list here!)
 * HTS221
   - New driver to support this relative humidiy and temperature device.
 * LMP91000
   - New driver for this potentiostat (form of chemical sensor). Nice example
     of use of the buffered consumer interfaces and the use of a consumer
     provided trigger.
 * MiraMEMS DA311
   - New driver for this 3 axis accelerometer.
 * MiraMEMS DA280
   - New driver for this 3 axis accelerometer. Follow up caught up with
   vendor prefixes for these.
 
 Staging graduations
 * isl29018 light sensor
   - Fixes and cleanups listed below (thanks for your hard work on this Brian!)
 * sca3000
   - Fixes and cleanups listed below.  This was one of the small set of drivers
   that went into staging when IIO was first added.  Turns out it had a few
   bugs and needed to be brought into the modern era!  Not clear if I am
   the only person who actually has one of these still wired to a board.
 
 New features (Core)
  - Add an iio_trigger_validate_own_device helper which relies on the device
    and trigger having the same parent.  Convenient to have this for some
    of the more complex trigger / device interactions. Was hand rolled in
    a few drivers already so good to bring it into the core.
  - Add an iio_read_channel_offset in kernel access helper (similar to
    the existing one for scale).
  - IIO_ATTR_{RO, WO, RW} and IIO_DEVICE_ATTR_{RO, WO, RW} macros.  These
    lead some rather contrived function naming, but there is no denying they
    do reduced boilerplate.  I'm going to resist their introduction in
    drivers 'unless' they form part of a larger set of cleanups.
  - Counter channel type and index type.
 
 New features (Drivers)
 * hdc100x
   - Triggered buffer support.
 * mcp4725
   - Device tree bindings and support.
   - Voltage reference selection.
 * ti-adc0832
   - Triggered buffer support.
 * ti-adc161s626
   - Add regulator support allowing _scale and _offset values to be established
   and exported.
 
 New features (Tools)
 * iio_generic_buffer
   - -A option to force enable all channels rather than faulting if some are
   already enabled (like -a does).  Followup patches tidied this support up.
 
 Cleanups (Core)
  - Use kmalloc_array in iio_scan_mask_set.
  - Take event_attrs field of iio_info structure constant
  - Staging todo list updates. Most of it was long done.
  - MAINTAINERS had a wrong directory listing.
 
 Cleanups (Drivers)
 * Missing i2c trivial devices entries.
 * ad5592r
   - Fix an endian type related sparse warnings.
 * ad7150
   - Constify the event attribute_group structures.
 * ad7152
   - Add some blank lines to improve readability.
   - Sampling frequency control via chan-info element rather than hand rolled
   attributes.
   - add a new lock to avoid use of mlock for non state change related locking.
 * ad7280
   - Constify atrribute_group structure (second patch covers the event ones)
 * ad7606 (Lars is driving most of the cleanup on this with some additions from
   Eva)
   - Fix improper setting of oversampling pins.  This has been broken a very
   long time in this staging driver, so not going to push this back to stable.
   - Implement oversampling configuration via the chan_info mask element.
   - Remove an unused int_vref_mv field.
   - Remove a reundant name field from ad7606_chip_info.
   - Remove default device configuration from platform_data in favour of
   whatever the power on defaults are.
   - Remove out of band error reporting in the kernel log as not providing
   much information.
   - Fix oversampling ratio by having 1 be the value for no oversampling.
   - Avoid allocating buffer for each data capture.
   - Factor out common code between periodic and one-shot capture.
   - Move set_drvdat into common code.
   - Let the common probe function return int rather than jumping through
   an ERR_PTR.
   - Pass struct device * into common remove to simplify code.
   - Always run trigger handler only once per event (no one can remember why
   it was being possibly done twice).
   - Move over to the GPIO descriptor API to shorten and clarify code.
   - Move the buffer code into the main file as it's not optional and is
   now rather short in this driver.
   - Fix the naming of the supply regulator.
   - Rework regulator handling to handle errors including deferred probing.
   - Tidy up a ptr_err or 0 return.
 * ad7746
   - Sampling frequency control via info_mask element rather than hand rolled
 * ad7758
   - Sampling frequency control via info_mask element rather than hand rolled
   attributes.
 * ad7816
   - Constify the event attribute_group structure.
 * adt7316
   - Constify the event attribute group structures.
 * ak8974
   - Cleanup some sparse warnings about endian types.
 * ak8975
   - Cleanup some sparse warnings about endian types.
 * bmi160
   - Spare endian warning cleanups.
 * isl29018 (towards staging graduation)
   - Remove unusedvariables and defines.
   - Improve consistency of error handling.
   - Signed / unsigned comparison fixes.
   - Use the IIO_DEVICE_ATTR_{RO, RW} macros
   - Fix a race in in_illuminance_scale_available_show.
   - Cleanup exit points of _read_raw
   - Sanity check if in suspended state during a write_raw call as was already
     done for read_raw.
   - Document device tree bidnings.
   - Document infrared supression controls.
   - Add some newlines to improve readability and drop one that shouldn't be
     there.
   - Fix a poorly named functions name.
   - Fix multiline coment syntax.
   - Tidy up a pair or return statements by unifying them.
   - Rename description in Kconfig for consistency with similar drivers.
 * lidar
   - cleanup power management by dropping unnecessary call.
 * ltr501
   - Use the claim_direct_mode helpers. Fix a race condition along the way.
 * max1027
   - Fix a dubious x | !y sparse warning.
   - Use the new iio_trigger_validate_own_device helper.
 * max440000
   - Clean up some sparse warnings about endian types.
 * mcp4725
   - Use the regulator framework to establish the reference voltage rather than
     getting it from platform data.
   - Tidy up a comment typo.
   - Fix a wrong PTR_ERR query (wrong regulator).
 * mma7660
   - Take a mma7660_nscale static.
 * mma8452
   - Use the new iio_trigger_validate_own_device helper.
   - Use claim_direct_mode helpers - fix a race condition along the way.
 * mpl3115
   - Use claim_direct_mode helpers - fix a race condition along the way.
 * ms65611
   - Tidy up regulator error handling and clean out a static warning in the mix.
 * sca3000
   - Avoid a potential unitialized variable if a hardware read returns a value
   that isn't actually supported (mostly warning supression).
   - Fix a use before setting of the indio_dev->buffer pointer. Broken for
   a very long time so not going to rush this into stable.
   - Merge buffer file with core file.  We used to always split these.
   Sometimes it's just not worth the hassle. In this case the device's main
   feature is it's hardware fifos so unlikely anyone would want to run it
   without.
   - Drop the sca3000_register_ring_funcs function as it's a pointless wrapper
   once we have only one file.
   - Fix cleaning of flag + setting of size of scan. Without this you can't
   start the buffer twice and expect sensible (or any) results.  Again,
   broken for a long time so not heading for stable.
   - Drop the custom watershed setting ABI - for now we'll just support one
   value.
   - Move to a hybrid hard / soft buffer design (how we've been doing it
   for similar devices for a while now!)
   - Cleanup some unusued variables.
   - Use a fake channel to support core handling of freefall event registration.
   - Cleanup the register defines.
   - Fix an off by one error in axis due to IIO_NO_MOD taking up the 0 value.
   Been broken since first admission of IIO to the staging tree.
   - Add readback of the 3db low pass filter frequency and later writing
     allowing droppign of custom measurement mode attributes as they can
     be represented by the filter choices that is their main characteristic.
   - Drop non standard revision attr and replace with dev_info on probe.
   - Avoid a race in probe.
   - Various formatting fixes.
   - Kernel-docify docs that were very nearly in the write format.
 * tsl2583
   - Constify attribute_group structure.
 * zpa2326
   - Drop a redundant DEBUG ifdef.
 
 Cleanups (Tools)
 * iio_generic_buffer
   - Fix the ? arguement. Previously it sort of worked as you got the help
     message as a result of it not recognising the arguement.
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Merge tag 'iio-for-4.10a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

First round of IIO new device support, features and cleanups for the 4.10 cycle.

Fair number of outreachy related patches in here. Some of these may well
have already been picked up by Greg but git will sort that out for us.

Also some good staging cleanup work from other sources. Thanks Brian and Lars
in particular for this.

New device support
* ACCES 104-quad-8
  - New driver for this 8 channel encoder input board. Lots of new ABI with
    this one.
* AD7766
  - New driver supporting AD7766, AD7766-1, AD7766-2, AD7767, AD7767-1 and
    AD7767-2 24 bit ADCs.
* dmard 10
  - New driver for this 3 axis accelerometer.
* Honeywell ABP pressure sensors.
  - New driver covering 56 parts in this series (too many to list here!)
* HTS221
  - New driver to support this relative humidiy and temperature device.
* LMP91000
  - New driver for this potentiostat (form of chemical sensor). Nice example
    of use of the buffered consumer interfaces and the use of a consumer
    provided trigger.
* MiraMEMS DA311
  - New driver for this 3 axis accelerometer.
* MiraMEMS DA280
  - New driver for this 3 axis accelerometer. Follow up caught up with
  vendor prefixes for these.

Staging graduations
* isl29018 light sensor
  - Fixes and cleanups listed below (thanks for your hard work on this Brian!)
* sca3000
  - Fixes and cleanups listed below.  This was one of the small set of drivers
  that went into staging when IIO was first added.  Turns out it had a few
  bugs and needed to be brought into the modern era!  Not clear if I am
  the only person who actually has one of these still wired to a board.

New features (Core)
 - Add an iio_trigger_validate_own_device helper which relies on the device
   and trigger having the same parent.  Convenient to have this for some
   of the more complex trigger / device interactions. Was hand rolled in
   a few drivers already so good to bring it into the core.
 - Add an iio_read_channel_offset in kernel access helper (similar to
   the existing one for scale).
 - IIO_ATTR_{RO, WO, RW} and IIO_DEVICE_ATTR_{RO, WO, RW} macros.  These
   lead some rather contrived function naming, but there is no denying they
   do reduced boilerplate.  I'm going to resist their introduction in
   drivers 'unless' they form part of a larger set of cleanups.
 - Counter channel type and index type.

New features (Drivers)
* hdc100x
  - Triggered buffer support.
* mcp4725
  - Device tree bindings and support.
  - Voltage reference selection.
* ti-adc0832
  - Triggered buffer support.
* ti-adc161s626
  - Add regulator support allowing _scale and _offset values to be established
  and exported.

New features (Tools)
* iio_generic_buffer
  - -A option to force enable all channels rather than faulting if some are
  already enabled (like -a does).  Followup patches tidied this support up.

Cleanups (Core)
 - Use kmalloc_array in iio_scan_mask_set.
 - Take event_attrs field of iio_info structure constant
 - Staging todo list updates. Most of it was long done.
 - MAINTAINERS had a wrong directory listing.

Cleanups (Drivers)
* Missing i2c trivial devices entries.
* ad5592r
  - Fix an endian type related sparse warnings.
* ad7150
  - Constify the event attribute_group structures.
* ad7152
  - Add some blank lines to improve readability.
  - Sampling frequency control via chan-info element rather than hand rolled
  attributes.
  - add a new lock to avoid use of mlock for non state change related locking.
* ad7280
  - Constify atrribute_group structure (second patch covers the event ones)
* ad7606 (Lars is driving most of the cleanup on this with some additions from
  Eva)
  - Fix improper setting of oversampling pins.  This has been broken a very
  long time in this staging driver, so not going to push this back to stable.
  - Implement oversampling configuration via the chan_info mask element.
  - Remove an unused int_vref_mv field.
  - Remove a reundant name field from ad7606_chip_info.
  - Remove default device configuration from platform_data in favour of
  whatever the power on defaults are.
  - Remove out of band error reporting in the kernel log as not providing
  much information.
  - Fix oversampling ratio by having 1 be the value for no oversampling.
  - Avoid allocating buffer for each data capture.
  - Factor out common code between periodic and one-shot capture.
  - Move set_drvdat into common code.
  - Let the common probe function return int rather than jumping through
  an ERR_PTR.
  - Pass struct device * into common remove to simplify code.
  - Always run trigger handler only once per event (no one can remember why
  it was being possibly done twice).
  - Move over to the GPIO descriptor API to shorten and clarify code.
  - Move the buffer code into the main file as it's not optional and is
  now rather short in this driver.
  - Fix the naming of the supply regulator.
  - Rework regulator handling to handle errors including deferred probing.
  - Tidy up a ptr_err or 0 return.
* ad7746
  - Sampling frequency control via info_mask element rather than hand rolled
* ad7758
  - Sampling frequency control via info_mask element rather than hand rolled
  attributes.
* ad7816
  - Constify the event attribute_group structure.
* adt7316
  - Constify the event attribute group structures.
* ak8974
  - Cleanup some sparse warnings about endian types.
* ak8975
  - Cleanup some sparse warnings about endian types.
* bmi160
  - Spare endian warning cleanups.
* isl29018 (towards staging graduation)
  - Remove unusedvariables and defines.
  - Improve consistency of error handling.
  - Signed / unsigned comparison fixes.
  - Use the IIO_DEVICE_ATTR_{RO, RW} macros
  - Fix a race in in_illuminance_scale_available_show.
  - Cleanup exit points of _read_raw
  - Sanity check if in suspended state during a write_raw call as was already
    done for read_raw.
  - Document device tree bidnings.
  - Document infrared supression controls.
  - Add some newlines to improve readability and drop one that shouldn't be
    there.
  - Fix a poorly named functions name.
  - Fix multiline coment syntax.
  - Tidy up a pair or return statements by unifying them.
  - Rename description in Kconfig for consistency with similar drivers.
* lidar
  - cleanup power management by dropping unnecessary call.
* ltr501
  - Use the claim_direct_mode helpers. Fix a race condition along the way.
* max1027
  - Fix a dubious x | !y sparse warning.
  - Use the new iio_trigger_validate_own_device helper.
* max440000
  - Clean up some sparse warnings about endian types.
* mcp4725
  - Use the regulator framework to establish the reference voltage rather than
    getting it from platform data.
  - Tidy up a comment typo.
  - Fix a wrong PTR_ERR query (wrong regulator).
* mma7660
  - Take a mma7660_nscale static.
* mma8452
  - Use the new iio_trigger_validate_own_device helper.
  - Use claim_direct_mode helpers - fix a race condition along the way.
* mpl3115
  - Use claim_direct_mode helpers - fix a race condition along the way.
* ms65611
  - Tidy up regulator error handling and clean out a static warning in the mix.
* sca3000
  - Avoid a potential unitialized variable if a hardware read returns a value
  that isn't actually supported (mostly warning supression).
  - Fix a use before setting of the indio_dev->buffer pointer. Broken for
  a very long time so not going to rush this into stable.
  - Merge buffer file with core file.  We used to always split these.
  Sometimes it's just not worth the hassle. In this case the device's main
  feature is it's hardware fifos so unlikely anyone would want to run it
  without.
  - Drop the sca3000_register_ring_funcs function as it's a pointless wrapper
  once we have only one file.
  - Fix cleaning of flag + setting of size of scan. Without this you can't
  start the buffer twice and expect sensible (or any) results.  Again,
  broken for a long time so not heading for stable.
  - Drop the custom watershed setting ABI - for now we'll just support one
  value.
  - Move to a hybrid hard / soft buffer design (how we've been doing it
  for similar devices for a while now!)
  - Cleanup some unusued variables.
  - Use a fake channel to support core handling of freefall event registration.
  - Cleanup the register defines.
  - Fix an off by one error in axis due to IIO_NO_MOD taking up the 0 value.
  Been broken since first admission of IIO to the staging tree.
  - Add readback of the 3db low pass filter frequency and later writing
    allowing droppign of custom measurement mode attributes as they can
    be represented by the filter choices that is their main characteristic.
  - Drop non standard revision attr and replace with dev_info on probe.
  - Avoid a race in probe.
  - Various formatting fixes.
  - Kernel-docify docs that were very nearly in the write format.
* tsl2583
  - Constify attribute_group structure.
* zpa2326
  - Drop a redundant DEBUG ifdef.

Cleanups (Tools)
* iio_generic_buffer
  - Fix the ? arguement. Previously it sort of worked as you got the help
    message as a result of it not recognising the arguement.
2016-10-24 11:34:22 +02:00
Alison Schofield ac13980584 iio: pressure: mpl3115: claim direct mode during raw reads
Driver was checking for direct mode but not locking it.  Use
claim/release helper functions to guarantee the device stays
in direct mode during raw reads.

Signed-off-by: Alison Schofield <amsfield22@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-10-23 19:33:55 +01:00
Crt Mori 3f5def652f iio: ms65611_core: Fixes dereferencing regulator pointer
Change in handling of the regulator description means that static
checkers correctly assume we could be using dereferenced pointer to the
regulator. In reality we will never get the -ENODEV error, as current
behavior flow does not predict it, because:
If the device tree or board file does not define suitable regulators for
the component, it will be substituted by a dummy regulator, or, if
regulators are disabled altogether, by stubs.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Suggested-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Crt Mori <cmo@melexis.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-10-23 19:33:50 +01:00
Linus Torvalds 41844e3620 Staging/IIO patches for 4.9-rc1
Here is the big staging and IIO driver pull request for 4.9-rc1.
 
 There are a lot of patches in here, the majority due to the
 drivers/staging/greybus/ subsystem being merged in with full development
 history that went back a few years, in order to preserve the work that
 those developers did over time.  This was done the same way that btrfs
 was merged into the tree, so all should be ok there.
 
 Lots and lots of tiny cleanups happened in the tree as well, due to the
 Outreachy application process and lots of other developers showing up
 for the first time to clean code up.  Along with those changes, we
 deleted a wireless driver, and added a raspberrypi driver (currently
 marked broken), and lots of new iio drivers.
 
 Overall the tree still shrunk with more lines removed than added, about
 10 thousand lines removed in total.  Full details are in the very long
 shortlog below.
 
 All of this has been in the linux-next tree with no issues.  There will
 be some merge problems with other subsystem trees, but those are all
 minor problems and shouldn't be hard to work out when they happen
 (MAINTAINERS and some lustre build problems with the IB tree.)
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging and IIO updates from Greg KH:
 "Here is the big staging and IIO driver pull request for 4.9-rc1.

  There are a lot of patches in here, the majority due to the
  drivers/staging/greybus/ subsystem being merged in with full
  development history that went back a few years, in order to preserve
  the work that those developers did over time.

  Lots and lots of tiny cleanups happened in the tree as well, due to
  the Outreachy application process and lots of other developers showing
  up for the first time to clean code up.  Along with those changes, we
  deleted a wireless driver, and added a raspberrypi driver (currently
  marked broken), and lots of new iio drivers.

  Overall the tree still shrunk with more lines removed than added,
  about 10 thousand lines removed in total. Full details are in the very
  long shortlog below.

  All of this has been in the linux-next tree with no issues. There will
  be some merge problems with other subsystem trees, but those are all
  minor problems and shouldn't be hard to work out when they happen
  (MAINTAINERS and some lustre build problems with the IB tree)"

And furter from me asking for clarification about greybus:
 "Right now there is a phone from Motorola shipping with this code (a
  slightly older version, but the same tree), so even though Ara is not
  alive in the same form, the functionality is happening. We are working
  with the developers of that phone to merge the newer stuff in with
  their fork so they can use the upstream version in future versions of
  their phone product line.

  Toshiba has at least one chip shipping in their catalog that
  needs/uses this protocol over a Unipro link, and rumor has it that
  there might be more in the future.

  There are also other users of the greybus protocols, there is a talk
  next week at ELC that shows how it is being used across a network
  connection to control a device, and previous ELC talks have showed the
  protocol stack being used over USB to drive embedded Linux boards.
  I've also talked to some people who are starting to work to add a host
  controller driver to control arduinos as the greybus PHY protocols are
  very useful to control a serial/i2c/spio/whatever device across a
  random physical link, as it is a way to have a self-describing device
  be attached to a host without needing manual configuration.

  So yes, people are using it, and there is still the chance that it
  will show up in a phone/laptop/tablet/whatever from Google in the
  future as well, the tech isn't dead, even if the original large phone
  project happens to be"

* tag 'staging-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (3703 commits)
  Staging: fbtft: Fix bug in fbtft-core
  staging: rtl8188eu: fix double unlock error in rtw_resume_process()
  staging:r8188eu: remove GEN_MLME_EXT_HANDLER macro
  staging:r8188eu: remove GEN_DRV_CMD_HANDLER macro
  staging:r8188eu: remove GEN_EVT_CODE macro
  staging:r8188eu: remove GEN_CMD_CODE macro
  staging:r8188eu: remove pkt_newalloc member of the recv_buf structure
  staging:r8188eu: remove rtw_handle_dualmac declaration
  staging:r8188eu: remove (RGTRY|BSSID)_(OFT|SZ) macros
  staging:r8188eu: change rtl8188e_process_phy_info function argument type
  Staging: fsl-mc: Remove blank lines
  Staging: fsl-mc: Fix unaligned * in block comments
  Staging: comedi: Align the * in block comments
  Staging : ks7010 : Fix block comments warninig
  Staging: vt6655: Remove explicit NULL comparison using Coccinelle
  staging: rtl8188eu: core: rtw_xmit: Use macros instead of constants
  staging: rtl8188eu: core: rtw_xmit: Move constant of the right side
  staging: dgnc: Fix lines longer than 80 characters
  Staging: dgnc: constify attribute_group structures
  Staging: most: hdm-dim2: constify attribute_group structures
  ...
2016-10-05 14:50:51 -07:00
Marcin Malagowski 9ecca12edd iio: pressure: Add driver for Honeywell ABP family
This patch adds minimal driver for the Honeywell Amplified Basic
Pressure sensors series. Sensors are pretty simple but are
available in many variants:
- psi/mbar/kPa output,
- analog/i2c/spi,
- gage/differential measurement,
- different measure ranges etc.

Refer to datasheets for more details:
http://sensing.honeywell.com/honeywell-sensing-basic-board-mount-pressure-sensors-abp-series-datasheet-323005128-c-en.pdf
http://sensing.honeywell.com/index.php%3Fci_id%3D45841

Driver internals:
- i2c only. measure request is done by the SMBUS QUICK cmd, so if the i2c
  bus doesn't support it, it is required to send a dummy byte to trigger
  measurement,
- since iio sysfs expects kilopascals, mbar-variants are treated as their
  respective kPa-s, hence i2c id-table has doubled entries in one line:
	{ "abp060mg", ABP006KG }, { "abp006kg", ABP006KG },
- psi-variants have prescaled values in config,
- no temperature reads yet.

Work remained:
- optional temperature channel,
- SPI support,
- DT binding.

Changes since v1:
- mutex is now locked in read_raw(),
- corrected error codes,
- fixed coding style issues,
- renamed few defines and functions abp -> abp060mg
(some structs left as they were to keep the sensible meaning).

Signed-off-by: Marcin Malagowski <mrc@bourne.st>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-10-01 15:14:37 +01:00
Arnd Bergmann 59dc1c8619 iio:pressure: zpa2326: remove redundant "DEBUG" ifdef
The -Wempty-body gcc warning triggers in the newly added zpa2326 driver:

drivers/iio/pressure/zpa2326.c: In function 'zpa2326_dequeue_pressure':
drivers/iio/pressure/zpa2326.c:578:3: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]

The use of an empty statement behind 'if (...)' is harmless here, but
it shows that the dev_dbg() macro is not used correctly: when the "DEBUG"
macro is not set, dev_dbg() already defaults to a no-operation, though
one that lets the compiler know that the arguments are used, and lets
it check the format string.

Fixing this also simplifies the driver.

Fixes: 03b262f2bb ("iio:pressure: initial zpa2326 barometer support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-09-22 18:43:59 +01:00
Gregor Boirie 03b262f2bb iio:pressure: initial zpa2326 barometer support
Introduce driver for Murata ZPA2326 pressure and temperature sensor:
http://www.murata.com/en-us/products/productdetail?partno=ZPA2326-0311A-R

Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-09-18 19:42:21 +01:00
Greg Kroah-Hartman 552edf8d79 Second set of iio new device support, features and cleanups for the 4.9 cycle.
New device support
 * ad8801 dac
   - new driver supporting ad8801 and ad8803 DACs.
 * adc12138
   - new driver supporting TI adc12130/adc12132 and adc12138 ADCs.
 * ltc2485 adc
   - new driver
 * mxc6255
   - add support for the mxc6225 part name and fixup the ID check so it works.
 * vz89x VOC sensor
   - add support for the vz89te part which drops the voc_short channel and adds
     CRCs compared to other supported parts.
 
 New features
 * core
   - immutable triggers.  These effectively grant exclusive control over a
     trigger. The typical usecase is a device representing an analog part
     (perhaps a MUX) that needs to control the sampling of a downstream
     ADC.
   - resource managed trigger registration and triggered_buffer_init.
   - iio_push_event now protected against case of the event interface
     registration not having yet occured.  Only matters if an interrupt
     can occur during this window - might happen on shared interrupt lines.
   - helper to let a driver query if the trigger it is using is provided by
     itself (using the convention of both device and trigger having the same
     parent).
 * tools
   - iio-utils. Used channel modifier scaling in preference to generic scaling
     when both exist.
 * at91-adc
   - Add support for touchscreen switches closure time needed by some newer
     parts.
 * stx104
   - support the ADC channels on this ADC/DAC board. As these are the primary
     feature of the board also move the driver to the iio/adc directory.
 * sx9500
   - device tree bindings.
 
 Cleanups / Fixes
 * ad5755
   - fix an off-by-one on devnr limit check (introduced earlier this cycle)
 * ad7266
   - drop NULL check on devm_regulator_get_optional as it can't return NULL.
 * ak8974
   - avoid an unused functional warning due to rework in PM core code.
   - remove .owner field setting as done by i2c_core.
 * ina2xx
   - clear out a left over debug field from chip global data.
 * hid-sensors
   - avoid an unused functional warning due to rework in PM core code.
 * maxim-thermocouple
   - fix non static symbol warnings.
 * ms5611
   - fetch and enable regulators unconditionally when they aren't optional.
 * sca3000
   - whitespace cleanup.
 * st_sensors
   - fetch and enable regulators unconditionally rather than having them
     supported as optional regulators (missunderstanding on my part amongst
     others a while back)
   - followup to previous patch fixes error checking on the regulators.
   - mark symbols static where possible.
   - use the 'is it my trigger' help function.  This prevents the odd case
     of another device triggering from the st-sensors trigger whilst the
     st-sensors trigger is itself not using it but rather using say an hrtimer.
 * ti-ads1015
   - add missing of_node_put.
 * vz89x
   - rework to all support of new devices.
   - prevent reading of a corrupted buffer.
   - fixup a return value of 0/1 in a bool returning function.
 
 Address updates
 - Vlad Dogaru email address change.
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Merge tag 'iio-for-4.9b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Second set of iio new device support, features and cleanups for the 4.9 cycle.

New device support
* ad8801 dac
  - new driver supporting ad8801 and ad8803 DACs.
* adc12138
  - new driver supporting TI adc12130/adc12132 and adc12138 ADCs.
* ltc2485 adc
  - new driver
* mxc6255
  - add support for the mxc6225 part name and fixup the ID check so it works.
* vz89x VOC sensor
  - add support for the vz89te part which drops the voc_short channel and adds
    CRCs compared to other supported parts.

New features
* core
  - immutable triggers.  These effectively grant exclusive control over a
    trigger. The typical usecase is a device representing an analog part
    (perhaps a MUX) that needs to control the sampling of a downstream
    ADC.
  - resource managed trigger registration and triggered_buffer_init.
  - iio_push_event now protected against case of the event interface
    registration not having yet occured.  Only matters if an interrupt
    can occur during this window - might happen on shared interrupt lines.
  - helper to let a driver query if the trigger it is using is provided by
    itself (using the convention of both device and trigger having the same
    parent).
* tools
  - iio-utils. Used channel modifier scaling in preference to generic scaling
    when both exist.
* at91-adc
  - Add support for touchscreen switches closure time needed by some newer
    parts.
* stx104
  - support the ADC channels on this ADC/DAC board. As these are the primary
    feature of the board also move the driver to the iio/adc directory.
* sx9500
  - device tree bindings.

Cleanups / Fixes
* ad5755
  - fix an off-by-one on devnr limit check (introduced earlier this cycle)
* ad7266
  - drop NULL check on devm_regulator_get_optional as it can't return NULL.
* ak8974
  - avoid an unused functional warning due to rework in PM core code.
  - remove .owner field setting as done by i2c_core.
* ina2xx
  - clear out a left over debug field from chip global data.
* hid-sensors
  - avoid an unused functional warning due to rework in PM core code.
* maxim-thermocouple
  - fix non static symbol warnings.
* ms5611
  - fetch and enable regulators unconditionally when they aren't optional.
* sca3000
  - whitespace cleanup.
* st_sensors
  - fetch and enable regulators unconditionally rather than having them
    supported as optional regulators (missunderstanding on my part amongst
    others a while back)
  - followup to previous patch fixes error checking on the regulators.
  - mark symbols static where possible.
  - use the 'is it my trigger' help function.  This prevents the odd case
    of another device triggering from the st-sensors trigger whilst the
    st-sensors trigger is itself not using it but rather using say an hrtimer.
* ti-ads1015
  - add missing of_node_put.
* vz89x
  - rework to all support of new devices.
  - prevent reading of a corrupted buffer.
  - fixup a return value of 0/1 in a bool returning function.

Address updates
- Vlad Dogaru email address change.
2016-09-14 20:42:03 +02:00
Crt Mori 6751607488 iio: fetch and enable regulators unconditionally
This patch is inspired by a comment of Jonathan Cameron on patch of
Linus Walleij commit aeb55fff38 ("iio: st_sensors: fetch and enable regulators unconditionally").

The explanation for this change is same as in that patch:
"Supplies are *not* optional (optional means that the supply is
optional in the electrical sense, not the software sense) so we need to
get the and enable them at all times.

If the device tree or board file does not define suitable regulators for
the component, it will be substituted by a dummy regulator, or, if
regulators are disabled altogether, by stubs. There is no need to use the
IS_ERR_OR_NULL() check that is considered harmful.

Reported-by: Linus Wallerij <linus.walleij@linaro.org>
Suggested-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Crt Mori <cmo@melexis.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-09-05 21:08:40 +01:00
Greg Kroah-Hartman fbc1ec2efe Merge 4.8-rc5 into char-misc-next
We want the fixes in here for merging and testing.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-05 08:04:07 +02:00
Linus Walleij 832c8232dd misc: retire the old BMP085 driver
Patches merged to the IIO BMP085 driver makes it fully compliant
with all features found in this old misc driver. Retire this old
driver in favor of the new one in the proper subsystem.

Cc: Jonathan Cameron <jic23@cam.ac.uk>
Cc: Marek Belisko <marek@goldelico.com>
Acked-by: H. Nikolaus Schaller <hns@goldelico.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-31 14:11:33 +02:00
Linus Walleij 31f453eac5 iio: pressure: bmp280: fix runtime suspend/resume crash
In commit 3d838118c6 ("iio: pressure: bmp280: add power management")

For some reason the code in the runtime suspend/resume hooks
got wrong (I suspect in the ambition to cut down boilerplate)
and it seems it was tested without CONFIG_PM and crashes like
so for me:

Unable to handle kernel NULL pointer dereference at virtual address 0000000c
pgd = c0204000
[0000000c] *pgd=00000000
Internal error: Oops: 5 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 1 PID: 89 Comm: kworker/1:2 Not tainted
  4.7.0-03348-g90dc3680458a-dirty #99
Hardware name: Generic DT based system
Workqueue: pm pm_runtime_work
task: df3c6300 ti: dec8a000 task.ti: dec8a000
PC is at regulator_disable+0x0/0x6c
LR is at bmp280_runtime_suspend+0x3c/0xa4

Dereferencing the BMP280 state container properly fixes the problem,
sorry for screwing up.

Fixes: 3d838118c6 ("iio: pressure: bmp280: add power management")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-08-15 15:46:06 +01:00
Wei Yongjun bb9947c3a1 iio: pressure: bmp280: fix wrong pointer passed to PTR_ERR()
PTR_ERR should access the value just tested by IS_ERR, otherwise
the wrong error code will be returned.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-08-15 15:38:59 +01:00
Gregor Boirie 060a518eda iio:st_pressure: clean useless static channel initializers
Some static channels are explicitly initialized with default values.
Remove them to enhance readability.

Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-07-04 18:13:54 +01:00
Gregor Boirie 85d79136d3 iio:st_pressure:lps22hb: temperature support
Implement lps22hb temperature sampling channel.

Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-07-04 18:13:02 +01:00
Gregor Boirie 05167cdce0 iio:st_pressure:lps22hb: open drain support
Add support for open drain interrupt line.

Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-07-04 18:12:21 +01:00
Gregor Boirie b4701fd692 iio:st_pressure: temperature triggered buffering
Enable support for triggered buffering of temperature samples.

Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-07-04 18:11:52 +01:00