linux.git/drivers/iio/adc, branch v5.4.228

iio: adc: at91_adc: fix possible memory leak in at91_adc_allocate_trigger()

2022-11-25T16:42:19+00:00

commit 65f20301607d07ee279b0804d11a05a62a6c1a1c upstream.

If iio_trigger_register() returns error, it should call iio_trigger_free()
to give up the reference that hold in iio_trigger_alloc(), so that it can
call iio_trig_release() to free memory when the refcount hit to 0.

Fixes: 0e589d5fb317 ("ARM: AT91: IIO: Add AT91 ADC driver.")
Signed-off-by: Yang Yingliang 
Link: https://lore.kernel.org/r/20221024084511.815096-1-yangyingliang@huawei.com
Cc: 
Signed-off-by: Jonathan Cameron 
Signed-off-by: Greg Kroah-Hartman

iio: adc: at91-sama5d2_adc: lock around oversampling and sample freq

2022-10-26T11:22:34+00:00

[ Upstream commit 9780a23ed5a0a0a63683e078f576719a98d4fb70 ]

.read_raw()/.write_raw() could be called asynchronously from user space
or other in kernel drivers. Without locking on st->lock these could be
called asynchronously while there is a conversion in progress. Read will
be harmless but changing registers while conversion is in progress may
lead to inconsistent results. Thus, to avoid this lock st->lock.

Fixes: 27e177190891 ("iio:adc:at91_adc8xx: introduce new atmel adc driver")
Fixes: 6794e23fa3fe ("iio: adc: at91-sama5d2_adc: add support for oversampling resolution")
Signed-off-by: Claudiu Beznea 
Link: https://lore.kernel.org/r/20220803102855.2191070-4-claudiu.beznea@microchip.com
Signed-off-by: Jonathan Cameron 
Signed-off-by: Sasha Levin

iio: adc: at91-sama5d2_adc: check return status for pressure and touch

2022-10-26T11:22:33+00:00

[ Upstream commit d84ace944a3b24529798dbae1340dea098473155 ]

Check return status of at91_adc_read_position() and
at91_adc_read_pressure() in at91_adc_read_info_raw().

Fixes: 6794e23fa3fe ("iio: adc: at91-sama5d2_adc: add support for oversampling resolution")
Signed-off-by: Claudiu Beznea 
Link: https://lore.kernel.org/r/20220803102855.2191070-3-claudiu.beznea@microchip.com
Signed-off-by: Jonathan Cameron 
Signed-off-by: Sasha Levin

iio: adc: at91-sama5d2_adc: fix AT91_SAMA5D2_MR_TRACKTIM_MAX

2022-10-26T11:22:33+00:00

[ Upstream commit bb73d5d9164c57c4bb916739a98e5cd8e0a5ed8c ]

All ADC HW versions handled by this driver (SAMA5D2, SAM9X60, SAMA7G5)
have MR.TRACKTIM on 4 bits. Fix AT91_SAMA5D2_MR_TRACKTIM_MAX to reflect
this.

Fixes: 27e177190891 ("iio:adc:at91_adc8xx: introduce new atmel adc driver")
Signed-off-by: Claudiu Beznea 
Link: https://lore.kernel.org/r/20220803102855.2191070-2-claudiu.beznea@microchip.com
Signed-off-by: Jonathan Cameron 
Signed-off-by: Sasha Levin

iio: adc: mcp3911: use correct formula for AD conversion

2022-09-15T10:04:51+00:00

commit 9e2238e3ae40d371a1130226e0e740aa1601efa6 upstream.

The ADC conversion is actually not rail-to-rail but with a factor 1.5.
Make use of this factor when calculating actual voltage.

Fixes: 3a89b289df5d ("iio: adc: add support for mcp3911")
Signed-off-by: Marcus Folkesson 
Reviewed-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20220722130726.7627-4-marcus.folkesson@gmail.com
Cc: 
Signed-off-by: Jonathan Cameron 
Signed-off-by: Greg Kroah-Hartman

iio: adc: mcp3911: make use of the sign bit

2022-09-15T10:04:50+00:00

[ Upstream commit 8f89e33bf040bbef66386c426198622180233178 ]

The device supports negative values as well.

Fixes: 3a89b289df5d ("iio: adc: add support for mcp3911")
Signed-off-by: Marcus Folkesson 
Reviewed-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20220722130726.7627-2-marcus.folkesson@gmail.com
Signed-off-by: Jonathan Cameron 
Signed-off-by: Sasha Levin

iio: adc: axp288: Override TS pin bias current for some models

2022-06-29T06:58:48+00:00

commit 048058399f19d43cf21de9f5d36cd8144337d004 upstream.

Since commit 9bcf15f75cac ("iio: adc: axp288: Fix TS-pin handling") we
preserve the bias current set by the firmware at boot. This fixes issues
we were seeing on various models.

Some models like the Nuvision Solo 10 Draw tablet actually need the
old hardcoded 80ųA bias current for battery temperature monitoring
to work properly.

Add a quirk entry for the Nuvision Solo 10 Draw to the DMI quirk table
to restore setting the bias current to 80ųA on this model.

Fixes: 9bcf15f75cac ("iio: adc: axp288: Fix TS-pin handling")
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=215882
Signed-off-by: Hans de Goede 
Link: https://lore.kernel.org/r/20220506095040.21008-1-hdegoede@redhat.com
Cc: 
Signed-off-by: Jonathan Cameron 
Signed-off-by: Greg Kroah-Hartman

iio: adc: stm32: fix maximum clock rate for stm32mp15x

2022-06-29T06:58:48+00:00

commit 990539486e7e311fb5dab1bf4d85d1a8973ae644 upstream.

Change maximum STM32 ADC input clock rate to 36MHz, as specified
in STM32MP15x datasheets.

Fixes: d58c67d1d851 ("iio: adc: stm32-adc: add support for STM32MP1")
Signed-off-by: Olivier Moysan 
Reviewed-by: Fabrice Gasnier 
Link: https://lore.kernel.org/r/20220609095234.375925-1-olivier.moysan@foss.st.com
Cc: 
Signed-off-by: Jonathan Cameron 
Signed-off-by: Greg Kroah-Hartman

iio: adc: sc27xx: Fine tune the scale calibration values

2022-06-14T16:11:52+00:00

[ Upstream commit 5a7a184b11c6910f47600ff5cbbee34168f701a8 ]

Small adjustment the scale calibration value for the sc2731,
use new name sc2731_[big|small]_scale_graph_calib, and remove
the origin [big|small]_scale_graph_calib struct for unused.

Fixes: 8ba0dbfd07a35 (iio: adc: sc27xx: Add ADC scale calibration)
Signed-off-by: Cixi Geng 
Link: https://lore.kernel.org/r/20220419142458.884933-4-gengcixi@gmail.com
Signed-off-by: Jonathan Cameron 
Signed-off-by: Sasha Levin

iio: adc: sc27xx: fix read big scale voltage not right

2022-06-14T16:11:52+00:00

[ Upstream commit ad930a75613282400179361e220e58b87386b8c7 ]

Fix wrong configuration value of SC27XX_ADC_SCALE_MASK and
SC27XX_ADC_SCALE_SHIFT by spec documetation.

Fixes: 5df362a6cf49c (iio: adc: Add Spreadtrum SC27XX PMICs ADC support)
Signed-off-by: Cixi Geng 
Reviewed-by: Baolin Wang 
Link: https://lore.kernel.org/r/20220419142458.884933-3-gengcixi@gmail.com
Signed-off-by: Jonathan Cameron 
Signed-off-by: Sasha Levin