linux.git/drivers/iio, branch v5.9-rc2

iio: imu: st_lsm6dsx: reset hw ts after resume

2020-07-22T13:55:43+00:00

Reset hw time samples generator after system resume in order to avoid
disalignment between system and device time reference since FIFO
batching and time samples generator are disabled during suspend.

Fixes: 213451076bd3 ("iio: imu: st_lsm6dsx: add hw timestamp support")
Tested-by: Sean Nyekjaer 
Signed-off-by: Lorenzo Bianconi 
Cc: 
Signed-off-by: Jonathan Cameron

iio: dac: ad5592r: fix unbalanced mutex unlocks in ad5592r_read_raw()

2020-07-22T13:51:54+00:00

There are 2 exit paths where the lock isn't held, but try to unlock the
mutex when exiting. In these places we should just return from the
function.

A neater approach would be to cleanup the ad5592r_read_raw(), but that
would make this patch more difficult to backport to stable versions.

Fixes 56ca9db862bf3: ("iio: dac: Add support for the AD5592R/AD5593R ADCs/DACs")
Reported-by: Charles Stanhope 
Signed-off-by: Alexandru Ardelean 
Cc: 
Signed-off-by: Jonathan Cameron

Merge branch 'ib-5.8-jz47xx-ts' into HEAD

2020-07-22T13:36:31+00:00

Immutable branch may be needed in input for a joystick set that is
dependent on it.

iio: core: fix/re-introduce back parent assignment

2020-07-22T13:36:23+00:00

This was introduced initially via commit 78289b4a58b58 ("iio: core: pass
parent device as parameter during allocation"), but was accidentally
removed via commit 6d4ebd565d15f ("iio: core: wrap IIO device into an
iio_dev_opaque object").

This looks like a rebase gone wrong, and ends up breaking devicetree
bindings of IIO clients.

This change adds back the parent assignment.

Fixes 6d4ebd565d15f: ("iio: core: wrap IIO device into an iio_dev_opaque object")
Reported-by: Dmitry Baryshkov 
Signed-off-by: Alexandru Ardelean 
Tested-by: Dmitry Baryshkov 
Signed-off-by: Jonathan Cameron

iio: adc: ad7124: move chip ID & name on the chip_info table

2020-07-22T13:36:05+00:00

This change does the following:
* removes the SPI device table in favor of the OF device table
* adds 'name' && 'chip_id' fields to chip_info
* implements chip ID & silicon revision checking; the device ID for
  AD7124-4 is 0x0, so just checking that value can be useless;
  but at least the silicon revision isn't 0, so a non-zero value can be
  used to check that "a" device is on the SPI bus; it's probably the best
  way to narrow it down to one of the 2 AD7124 chip IDs

Signed-off-by: Alexandru Ardelean 
Signed-off-by: Jonathan Cameron

IIO: Ingenic JZ47xx: Add touchscreen mode.

2020-07-20T09:28:39+00:00

The SADC component in JZ47xx SoCs provides support for touchscreen
operations (pen position and pen down pressure) in single-ended and
differential modes.

The touchscreen component of SADC takes a significant time to stabilize
after first receiving the clock and a delay of 50ms has been empirically
proven to be a safe value before data sampling can begin.

Of the known hardware to use this controller, GCW Zero and Anbernic RG-350
utilize the touchscreen mode by having their joystick(s) attached to the
X/Y positive/negative input pins.

JZ4770 and later SoCs introduce a low-level command feature. With it, up
to 32 commands can be programmed, each one corresponding to a sampling
job. It allows to change the low-voltage reference, the high-voltage
reference, have them connected to VCC, GND, or one of the X-/X+ or Y-/Y+
pins.

This patch introduces support for 6 stream-capable channels:
- channel #0 samples X+/GND
- channel #1 samples Y+/GND
- channel #2 samples X-/GND
- channel #3 samples Y-/GND
- channel #4 samples X+/X-
- channel #5 samples Y+/Y-

Being able to sample X-/GND and Y-/GND is useful on some devices, where
one joystick is connected to the X+/Y+ pins, and a second joystick is
connected to the X-/Y- pins.

All the boards which probe this driver have the interrupt provided from
Device Tree, with no need to handle a case where the IRQ was not provided.

Co-developed-by: Paul Cercueil 
Signed-off-by: Paul Cercueil 
Signed-off-by: Artur Rojek 
Signed-off-by: Jonathan Cameron

iio/adc: ingenic: Retrieve channels list from soc data struct

2020-07-20T09:26:50+00:00

Instead of having one array of struct iio_chan_spec for all SoCs, and
have some SoCs remove the last item of the array as they can't use it,
have each SoC define its array of supported channels.

Signed-off-by: Paul Cercueil 
Tested-by: Artur Rojek 
Signed-off-by: Artur Rojek 
Signed-off-by: Jonathan Cameron

IIO: Ingenic JZ47xx: Add xlate cb to retrieve correct channel idx

2020-07-20T09:25:32+00:00

Provide an of_xlate callback in order to retrieve the correct channel
specifier index from the IIO channels array.

Signed-off-by: Artur Rojek 
Tested-by: Paul Cercueil 
Signed-off-by: Jonathan Cameron

IIO: Ingenic JZ47xx: Error check clk_enable calls.

2020-07-20T09:24:01+00:00

Introduce error checks for the clk_enable calls used in this driver.
As part of the changes, move clk_enable/clk_disable calls out of
ingenic_adc_set_config and into respective logic of its callers.

Signed-off-by: Artur Rojek 
Tested-by: Paul Cercueil 
Signed-off-by: Jonathan Cameron

iio: light: stk3310: add chip id for STK3311-X variant

2020-07-20T08:03:38+00:00

The STK3311 chip has a variant called STK3311-X, which has a different
chip id of 0x12.

Add the chip id to the driver.

Signed-off-by: Icenowy Zheng 
Signed-off-by: Ondrej Jirman 
Signed-off-by: Jonathan Cameron