linux-stable.git/drivers/iio/trigger, branch v4.13.7

iio: trigger: stm32-timer: fix a corner case to write preset

2017-10-12T09:56:11+00:00

commit b7a9776c1f9443326632486fcbd82dca82f8511e upstream.

Balance timer start routine that sets ARPE: clear it in stop routine.
This fixes a corner case, when timer is used successively as trigger
(with sampling_frequency start/stop routines), then as a counter
(with preset).

Fixes: 93fbe91b5521 ("iio: Add STM32 timer trigger driver")
Signed-off-by: Fabrice Gasnier 
Signed-off-by: Jonathan Cameron 
Signed-off-by: Greg Kroah-Hartman

iio: trigger: stm32-timer: preset shouldn't be buffered

2017-10-12T09:56:11+00:00

commit 0a56eabc4e3f730782e4a9f3af4f60aa03a8a849 upstream.

Currently, setting preset value (ARR) will update directly 'Auto reload
value' only on 1st write access. But then, ARPE is set. This makes
ARR a shadow register. Preset value should be updated upon each
write request: ensure ARPE is 0. This fixes successive writes to
preset attribute.

Fixes: 4adec7da0536 ("iio: stm32 trigger: Add quadrature encoder device")
Signed-off-by: Fabrice Gasnier 
Signed-off-by: Jonathan Cameron 
Signed-off-by: Greg Kroah-Hartman

iio: trigger: stm32-timer: fix get trigger mode

2017-08-20T14:21:47+00:00

Fix reading trigger mode, when other bit-fields are set. SMCR register
value must be masked to read SMS (slave mode selection) only.

Fixes: 9eba381 ("iio: make stm32 trigger driver use
INDIO_HARDWARE_TRIGGERED mode")

Signed-off-by: Fabrice Gasnier 
Cc: 
Signed-off-by: Jonathan Cameron

iio: trigger: stm32-timer: add enable attribute

2017-07-30T13:48:14+00:00

In order to use encoder mode, timers needs to be enabled (e.g. CEN bit)
along with peripheral clock.
Add IIO_CHAN_INFO_ENABLE attribute to handle this.
Also, in triggered mode, CEN bit is set automatically in hardware.
Then clock must be enabled before starting triggered mode.

Signed-off-by: Fabrice Gasnier 
Acked-by: Benjamin Gaignard 
Signed-off-by: Jonathan Cameron

iio: trigger: stm32-timer: fix get/set down count direction

2017-07-30T13:46:02+00:00

Fixes: 4adec7da0536 ("iio: stm32 trigger: Add quadrature encoder device")

This fixes two issues:
- stm32_set_count_direction: to set down direction
- stm32_get_count_direction: to get down direction

IIO core provides/expects value to be an index of iio_enum items array.
This needs to be turned by these routines into TIM_CR1_DIR (e.g. BIT(4))
value.
Also, report error when attempting to write direction, when in encoder
mode: in this case, direction is read only (given by encoder inputs).

Signed-off-by: Fabrice Gasnier 
Acked-by: Benjamin Gaignard 
Signed-off-by: Jonathan Cameron

iio: trigger: stm32-timer: fix write_raw return value

2017-07-30T13:44:28+00:00

Fixes: 4adec7da0536 ("iio: stm32 trigger: Add quadrature encoder device")

IIO core expects zero as return value for write_raw() callback
in case of success.

Signed-off-by: Fabrice Gasnier 
Acked-by: Benjamin Gaignard 
Signed-off-by: Jonathan Cameron

iio: trigger: stm32-timer: fix quadrature mode get routine

2017-07-30T13:43:10+00:00

Fixes: 4adec7da0536 ("iio: stm32 trigger: Add quadrature encoder device")

SMS bitfiled is mode + 1. After reset, upon boot, SMS = 0. When reading
from sysfs, stm32_get_quadrature_mode() returns -1 (e.g. -EPERM) which is
wrong error code here. So, check SMS bitfiled matches valid encoder mode,
or return -EINVAL.

Signed-off-by: Fabrice Gasnier 
Acked-by: Benjamin Gaignard 
Signed-off-by: Jonathan Cameron

iio: make stm32 trigger driver use INDIO_HARDWARE_TRIGGERED mode

2017-06-11T14:59:05+00:00

Add validate function to be use to use the correct trigger.
Add an attribute to configure device mode like for quadrature and
enable modes

Signed-off-by: Benjamin Gaignard 
Signed-off-by: Jonathan Cameron

iio: stm32 trigger: Add support for TRGO2 triggers

2017-05-07T15:08:10+00:00

Add support for TRGO2 trigger that can be found on STM32F7.
Add additional master modes supported by TRGO2.
Register additional "tim[1/8]_trgo2" triggers for timer1 & timer8.
Detect TRGO2 timer capability (master mode selection 2).

Signed-off-by: Fabrice Gasnier 
Acked-by: Benjamin Gaignard 
Signed-off-by: Jonathan Cameron

Merge tag 'iio-fixes-for-4.11e' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

2017-04-18T17:38:38+00:00

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