kernel/linux.git/drivers/iio/adc, branch v6.18.21

iio: Use IRQF_NO_THREAD

2026-03-04T12:20:37+00:00

[ Upstream commit 04d390af97f2c28166f7ddfe1a6bda622e3a4766 ] The interrupt handler iio_trigger_generic_data_rdy_poll() will invoke other interrupt handler and this supposed to happen from within the hardirq. Use IRQF_NO_THREAD to forbid forced-threading. Signed-off-by: Sebastian Andrzej Siewior Reviewed-by: Andy Shevchenko Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin

iio: adc: pac1934: Fix clamped value in pac1934_reg_snapshot

2026-01-30T09:32:23+00:00

commit da934ef0fdff5ba21e82ec3ab3f95fe73137b0c9 upstream. The local variable 'curr_energy' was never clamped to PAC_193X_MIN_POWER_ACC or PAC_193X_MAX_POWER_ACC because the return value of clamp() was not used. Fix this by assigning the clamped value back to 'curr_energy'. Cc: stable@vger.kernel.org Fixes: 0fb528c8255b ("iio: adc: adding support for PAC193x") Signed-off-by: Thorsten Blum Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman

iio: adc: exynos_adc: fix OF populate on driver rebind

2026-01-30T09:32:22+00:00

commit ea6b4feba85e996e840e0b661bc42793df6eb701 upstream. Since commit c6e126de43e7 ("of: Keep track of populated platform devices") child devices will not be created by of_platform_populate() if the devices had previously been deregistered individually so that the OF_POPULATED flag is still set in the corresponding OF nodes. Switch to using of_platform_depopulate() instead of open coding so that the child devices are created if the driver is rebound. Fixes: c6e126de43e7 ("of: Keep track of populated platform devices") Cc: stable@vger.kernel.org # 3.16 Signed-off-by: Johan Hovold Reviewed-by: Krzysztof Kozlowski Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman

iio: adc: at91-sama5d2_adc: Fix potential use-after-free in sama5d2_adc driver

2026-01-30T09:32:22+00:00

commit dbdb442218cd9d613adeab31a88ac973f22c4873 upstream. at91_adc_interrupt can call at91_adc_touch_data_handler function to start the work by schedule_work(&st->touch_st.workq). If we remove the module which will call at91_adc_remove to make cleanup, it will free indio_dev through iio_device_unregister but quite a bit later. While the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows: CPU0 CPU1 | at91_adc_workq_handler at91_adc_remove | iio_device_unregister(indio_dev) | //free indio_dev a bit later | | iio_push_to_buffers(indio_dev) | //use indio_dev Fix it by ensuring that the work is canceled before proceeding with the cleanup in at91_adc_remove. Fixes: 23ec2774f1cc ("iio: adc: at91-sama5d2_adc: add support for position and pressure channels") Signed-off-by: Pei Xiao Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman

iio: adc: ad9467: fix ad9434 vref mask

2026-01-30T09:32:22+00:00

commit 92452b1760ff2d1d411414965d4d06f75e1bda9a upstream. The mask setting is 5 bits wide for the ad9434 (ref. data sheet register 0x18 FLEX_VREF). Apparently the settings from ad9265 were copied by mistake when support for the device was added to the driver. Fixes: 4606d0f4b05f ("iio: adc: ad9467: add support for AD9434 high-speed ADC") Reviewed-by: Andy Shevchenko Reviewed-by: Nuno Sá Reviewed-by: David Lechner Signed-off-by: Tomas Melin Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman

iio: adc: ad7606: Fix incorrect type for error return variable

2026-01-30T09:32:16+00:00

[ Upstream commit c5512e016817a150fd6de97fbb3e74aa799ea3c1 ] The variable ret is declared as unsigned int but is used to store return values from functions returning int, which may be negative error codes. Change ret from unsigned int to int. Fixes: 849cebf8dc67 ("iio: adc: ad7606: Add iio-backend support") Signed-off-by: Haotian Zhang Reviewed-by: Andy Shevchenko Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin

iio: adc: ad7280a: handle spi_setup() errors in probe()

2026-01-30T09:32:16+00:00

[ Upstream commit 6b39824ac4c15783787e6434449772bfb2e31214 ] The probe() function ignored the return value of spi_setup(), leaving SPI configuration failures undetected. If spi_setup() fails, the driver should stop initialization and propagate the error to the caller. Add proper error handling: check the return value of spi_setup() and return it on failure. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 2051f25d2a26 ("iio: adc: New driver for AD7280A Lithium Ion Battery Monitoring System") Signed-off-by: Pavel Zhigulin Reviewed-by: Marcelo Schmitt Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin

iio: adc: ti_am335x_adc: Limit step_avg to valid range for gcc complains

2026-01-02T11:57:02+00:00

[ Upstream commit c9fb952360d0c78bbe98239bd6b702f05c2dbb31 ] FIELD_PREP() checks that a value fits into the available bitfield, add a check for step_avg to fix gcc complains. which gcc complains about: drivers/iio/adc/ti_am335x_adc.c: In function 'tiadc_step_config': include/linux/compiler_types.h:572:38: error: call to '__compiletime_assert_491' declared with attribute error: FIELD_PREP: value too large for the field include/linux/mfd/ti_am335x_tscadc.h:58:29: note: in expansion of macro 'FIELD_PREP' #define STEPCONFIG_AVG(val) FIELD_PREP(GENMASK(4, 2), (val)) ^~~~~~~~~~ drivers/iio/adc/ti_am335x_adc.c:127:17: note: in expansion of macro 'STEPCONFIG_AVG' stepconfig = STEPCONFIG_AVG(ffs(adc_dev->step_avg[i]) - 1) Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202510102117.Jqxrw1vF-lkp@intel.com/ Signed-off-by: Pei Xiao Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin

iio: adc: ad4080: fix chip identification

2025-12-12T17:42:46+00:00

commit b66cddc8be7278fd14650ff9182f3794397f8b31 upstream. Fix AD4080 chip identification by using the correct 16-bit product ID (0x0050) instead of GENMASK(2, 0). Update the chip reading logic to use regmap_bulk_read to read both PRODUCT_ID_L and PRODUCT_ID_H registers and combine them into a 16-bit value. The original implementation was incorrectly reading only 3 bits, which would not correctly identify the AD4080 chip. Fixes: 6b31ba1811b6 ("iio: adc: ad4080: add driver support") Signed-off-by: Antoniu Miclaus Reviewed-by: Nuno Sá Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman

iio: adc: ad7124: fix temperature channel

2025-10-13T07:38:09+00:00

Fix temperature channel not working due to gain and offset not being initialized. For channels other than the voltage ones calibration is skipped (which is OK). However that results in the calibration register values tracked in st->channels[i].cfg all being zero. These zeros are later written to hardware before a measurement is made which caused the raw temperature readings to be always 8388608 (0x800000). To fix it, we just make sure the gain and offset values are set to the default values and still return early without doing an internal calibration. While here, add a comment explaining why we don't bother calibrating the temperature channel. Fixes: 47036a03a303 ("iio: adc: ad7124: Implement internal calibration at probe time") Reviewed-by: Marcelo Schmitt Signed-off-by: David Lechner Reviewed-by: Uwe Kleine-König Cc: Signed-off-by: Jonathan Cameron