kernel/linux.git/Documentation/hwmon, branch v6.12.80

hwmon: (peci/cputemp) Fix crit_hyst returning delta instead of absolute temperature

2026-04-02T11:09:43+00:00

commit 0adc752b4f7d82af7bd14f7cad3091b3b5d702ba upstream. The hwmon sysfs ABI expects tempN_crit_hyst to report the temperature at which the critical condition clears, not the hysteresis delta from the critical limit. The peci cputemp driver currently returns tjmax - tcontrol for crit_hyst_type, which is the hysteresis margin rather than the corresponding absolute temperature. Return tcontrol directly, and update the documentation accordingly. Fixes: bf3608f338e9 ("hwmon: peci: Add cputemp driver") Cc: stable@vger.kernel.org Signed-off-by: Sanman Pradhan Link: https://lore.kernel.org/r/20260323002352.93417-2-sanman.pradhan@hpe.com Signed-off-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman

hwmon: (adm1177) fix sysfs ABI violation and current unit conversion

2026-04-02T11:09:40+00:00

[ Upstream commit bf08749a6abb6d1959bfdc0edc32c640df407558 ] The adm1177 driver exposes the current alert threshold through hwmon_curr_max_alarm. This violates the hwmon sysfs ABI, where *_alarm attributes are read-only status flags and writable thresholds must use currN_max. The driver also stores the threshold internally in microamps, while currN_max is defined in milliamps. Convert the threshold accordingly on both the read and write paths. Widen the cached threshold and related calculations to 64 bits so that small shunt resistor values do not cause truncation or overflow. Also use 64-bit arithmetic for the mA/uA conversions, clamp writes to the range the hardware can represent, and propagate failures from adm1177_write_alert_thr() instead of silently ignoring them. Update the hwmon documentation to reflect the attribute rename and the correct units returned by the driver. Fixes: 09b08ac9e8d5 ("hwmon: (adm1177) Add ADM1177 Hot Swap Controller and Digital Power Monitor driver") Signed-off-by: Sanman Pradhan Acked-by: Nuno Sá Link: https://lore.kernel.org/r/20260325051246.28262-1-sanman.pradhan@hpe.com Signed-off-by: Guenter Roeck Signed-off-by: Sasha Levin

hwmon: (aht10) Add support for dht20

2026-03-13T16:20:37+00:00

[ Upstream commit 3eaf1b631506e8de2cb37c278d5bc042521e82c1 ] Add support for dht20 temperature and humidity sensor from Aosong. Modify aht10 driver to handle different init command for dht20 sensor by adding init_cmd entry in the driver data. dht20 sensor is compatible with aht10 hwmon driver with this change. Tested on TI am62x SK board with dht20 sensor connected at i2c-2 port. Signed-off-by: Akhilesh Patil Link: https://lore.kernel.org/r/2025112-94320-906858@bhairav-test.ee.iitb.ac.in Signed-off-by: Guenter Roeck Stable-dep-of: b7497b5a99f5 ("hwmon: (aht10) Fix initialization commands for AHT20") Signed-off-by: Sasha Levin

hwmon: pmbus: mpq8785: Add support for MPM82504

2026-03-04T12:19:58+00:00

[ Upstream commit c27291468eb957b11dc81cd35fad36faf0861c07 ] Add support for the Monolithic Power Systems MPM82504 digital voltage regulator. MPM82504 uses PMBus direct format for voltage output. Tested with device tree based matching. Signed-off-by: Pawel Dembicki Link: https://lore.kernel.org/r/20250511035701.2607947-5-paweldembicki@gmail.com Signed-off-by: Guenter Roeck Stable-dep-of: 9e33c1dba224 ("hwmon: (pmbus/mpq8785) fix VOUT_MODE mismatch during identification") Signed-off-by: Sasha Levin

docs: hwmon: fix link to g762 devicetree binding

2025-12-18T12:55:20+00:00

[ Upstream commit 08bfcf4ff9d39228150a757803fc02dffce84ab0 ] The devicetree binding for g762 was converted to YAML to match vendor prefix conventions. Update the reference accordingly. Signed-off-by: Kathara Sasikumar Link: https://lore.kernel.org/r/20251205215835.783273-1-katharasasikumar007@gmail.com Fixes: 3d8e25372417 ("dt-bindings: hwmon: g762: Convert to yaml schema") Signed-off-by: Guenter Roeck Signed-off-by: Sasha Levin

hwmon: (dell-smm) Increment the number of fans

2025-05-29T09:02:22+00:00

[ Upstream commit dbcfcb239b3b452ef8782842c36fb17dd1b9092f ] Some Alienware laptops that support the SMM interface, may have up to 4 fans. Tested on an Alienware x15 r1. Signed-off-by: Kurt Borja Link: https://lore.kernel.org/r/20250304055249.51940-2-kuurtb@gmail.com Signed-off-by: Guenter Roeck Signed-off-by: Sasha Levin

hwmon: Remove devm_hwmon_device_unregister() API function

2024-09-13T14:27:36+00:00

devm_hwmon_device_unregister() has no in-tree user, and its implementation is wrong since it does not pass the to-be-removed hardware monitoring device as parameter. I do not envision a valid use for it; drivers needing it should not have called devm_hwmon_device_register_with_info() in the first place. Remove it. Reported-by: Matthew Sanders Closes: https://lore.kernel.org/linux-hwmon/488b3bdf870ea76c4b943dbe5fd15ac8113019dc.camel@kernel.org/ Signed-off-by: Guenter Roeck

hwmon: (ina2xx) Add support for current limits

2024-08-30T15:34:23+00:00

While the chips supported by this driver do not directly support current limits, they do support setting shunt voltage limits. The shunt voltage divided by the shunt resistor value is the current. On top of that, calibration values are set such that in the shunt voltage register and the current register report the same values. That means we can report and configure current limits based on shunt voltage limits, and we can do so with much better accuracy than by setting shunt voltage limits. Reviewed-by: Tzung-Bi Shih Signed-off-by: Guenter Roeck

hwmon: Add sophgo SG2042 external hardware monitor support

2024-08-27T15:11:15+00:00

SG2042 use an external MCU to provide basic hardware information and thermal sensors. Add driver support for the onboard MCU of SG2042. Signed-off-by: Inochi Amaoto Message-ID: Signed-off-by: Guenter Roeck

hwmon: (oxp-sensors) Add support for multiple new devices.

2024-08-27T15:10:33+00:00

Add support for the OrangePi NEO-01. It uses different registers for PWM manual mode, set PWM, and read fan speed than previous devices. Valid PWM input and duty cycle is 1-244, we scale this from 1-255 to maintain compatibility with the existing interface. Add OneXPlayer 2 series, OneXFly, and X1 series models. The 2/X1 series use new registers for turbo button takeover and read fan speed. X1 has an Intel variant so change the CPU detection at init to only check for the affected devices. While at it, adjust formatting of some constants and reorder all cases alphabetically for consistency. Rename OXP_OLD constants to OXP_MINI for disambiguation. Update code comments for clarity. Add support for AYANEO models 2S, AIR 1S, Flip series, GEEK 1S, and KUN. Signed-off-by: Derek J. Clark Tested-by: Kevin Greenberg Tested-by: Joshua Tam Tested-by: Parth Menon Tested-by: Philip Müller Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202408160329.TLNbIwRC-lkp@intel.com/ Message-ID: <20240822183525.27289-2-derekjohn.clark@gmail.com> Signed-off-by: Guenter Roeck