kernel/linux.git/Documentation/hwmon, branch v6.6.132

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

2026-04-02T11:07:25+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

2026-04-02T11:07:23+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

2026-03-25T10:05:38+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: (dell-smm) Increment the number of fans

2025-06-04T12:42:00+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: corsair-psu: add USB id of HX1200i Series 2023 psu

2024-08-14T11:58:41+00:00

[ Upstream commit b9c15c96ccb47ad860af2e075c5f3c90c4cd1730 ] Add the usb id of the HX1200i Series 2023. Update the documentation accordingly. Also fix the version comments, there are no Series 2022 products. That are legacy or first version products going back many many years. Signed-off-by: Wilken Gottwalt Link: https://lore.kernel.org/r/ZlAZs4u0dU7JxtDf@monster.localdomain Signed-off-by: Guenter Roeck Signed-off-by: Sasha Levin

Merge tag 'docs-6.6' of git://git.lwn.net/linux

2023-08-31T03:05:42+00:00

Pull documentation updates from Jonathan Corbet: "Documentation work keeps chugging along; this includes: - Work from Carlos Bilbao to integrate rustdoc output into the generated HTML documentation. This took some work to figure out how to do it without slowing the docs build and without creating people who don't have Rust installed, but Carlos got there - Move the loongarch and mips architecture documentation under Documentation/arch/ - Some more maintainer documentation from Jakub ... plus the usual assortment of updates, translations, and fixes" * tag 'docs-6.6' of git://git.lwn.net/linux: (56 commits) Docu: genericirq.rst: fix irq-example input: docs: pxrc: remove reference to phoenix-sim Documentation: serial-console: Fix literal block marker docs/mm: remove references to hmm_mirror ops and clean typos docs/zh_CN: correct regi_chg(),regi_add() to region_chg(),region_add() Documentation: Fix typos Documentation/ABI: Fix typos scripts: kernel-doc: fix macro handling in enums scripts: kernel-doc: parse DEFINE_DMA_UNMAP_[ADDR|LEN] Documentation: riscv: Update boot image header since EFI stub is supported Documentation: riscv: Add early boot document Documentation: arm: Add bootargs to the table of added DT parameters docs: kernel-parameters: Refer to the correct bitmap function doc: update params of memhp_default_state= docs: Add book to process/kernel-docs.rst docs: sparse: fix invalid link addresses docs: vfs: clean up after the iterate() removal docs: Add a section on surveys to the researcher guidelines docs: move mips under arch docs: move loongarch under arch ...

hwmon: Add driver for Renesas HS3001

2023-08-21T13:04:30+00:00

Add base support for Renesas HS3001 temperature and humidity sensors and its compatibles HS3002, HS3003 and HS3004. The sensor has a fix I2C address 0x44. The resolution is fixed to 14bit (ref. Missing feature). Missing feature: - Accessing non-volatile memory: Custom board has no possibility to control voltage supply of sensor. Thus, we cannot send the necessary control commands within the first 10ms after power-on. Signed-off-by: Andre Werner Link: https://lore.kernel.org/r/20230725042207.22310-2-andre.werner@systec-electronic.com [groeck: Cosmetic documentation fixup; added documentation to index; replaced probe_new with probe dropped unused variable] Signed-off-by: Guenter Roeck

hwmon: Remove smm665 driver

2023-08-21T13:04:29+00:00

SMM665 and related chips are power controller/sequencer chips from Summit Microelectronics. The company was acquired by Qualcomm in 2012, and support for the chip series stopped. The chips are long since gone from active use, making the driver unsupportable and just consuming space and compile time. Remove it. Signed-off-by: Guenter Roeck

hwmon: (nct6775) Change labels for nct6799

2023-08-21T13:04:29+00:00

nct6799d-r and nct6796d-s are very similar and chip_id is only different in the version nibblet. Since both will be detected by the driver anyway due to the chipid mask, they should be labeled together for dmesg msg. Signed-off-by: Ahmad Khalifa Link: https://lore.kernel.org/r/20230715195244.1334723-1-ahmad@khalifa.ws Signed-off-by: Guenter Roeck

hwmon: (pmbus) Update documentation to not use .probe_new() any more

2023-08-21T13:04:29+00:00

Since commit 03c835f498b5 ("i2c: Switch .probe() to not take an id parameter") .probe() is the recommended callback to implement an i2c driver (again). Reflect this in the documentation and don't mention .probe_new() which will be dropped soon. Signed-off-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20230627064948.593804-1-u.kleine-koenig@pengutronix.de Signed-off-by: Guenter Roeck