kernel/linux.git/Documentation/hwmon, branch v7.0-rc7

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

2026-03-25T13:50:13+00:00

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

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

2026-03-24T14:55:34+00:00

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

Revert "hwmon: add SMARC-sAM67 support"

2026-02-24T15:25:26+00:00

This reverts commit 443b39c82c322c9f3c38bea0389fe927ba00b3b4. I was just informed that this product is discontinued (without being ever released to the market). Pull the plug and let's not waste any more maintainers time. Signed-off-by: Michael Walle Link: https://lore.kernel.org/r/20260223100459.844967-4-mwalle@kernel.org Signed-off-by: Guenter Roeck

hwmon: (emc1403) correct a malformed email address

2026-02-22T23:48:30+00:00

Add a closing '>' to Kalhan's emaill address. line 60: Kalhan Trisal Link: https://lore.kernel.org/r/20260215010327.1687304-1-rdunlap@infradead.org Signed-off-by: Guenter Roeck

Merge tag 'hwmon-for-v7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

2026-02-11T19:00:19+00:00

Pull hwmon updates from Guenter Roeck: "New PMBus drivers: - HiTRON HAC300S power supply - Monolithic MP5926 Hot-Swap Controller - STEF48H28 hot-swap controller Support for new chips in existing drivers - Support for Pro WS TRX50-SAGE WIFI A and ROG MAXIMUS X HERO (asus-ec-sensors) - Support for Dell OptiPlex 7080 (dell-smm) - Support for F81968 (f71882fg) - Support for Micro PC 2 (gpd-fan) - New customer ID for ASRock Z590 Taichi (nct6683) - Support for ASUS Pro WS WRX90E-SAGE SE (nct6775) - Support for SHT85 (sht3x) - Support for P3T1035 and P3T2030 (tmp108) Bug fixes: - Revert "fix" for UAF which didn't fix a UAF but introduced a race condition resulting in a NULL pointer crash (ibmpex) - Fix failure to instantiate driver if the chip is configured for VID mode (pmbus/mpq8785) - Use READ/WRITE_ONCE to avoid compiler optimization induced race (max16065) - Resource leak fixes (nct7363, emc2305) Other notable changes: - Support for temperature limit thresholds (cros_ec) - Add TjMax for Silvermont through Tremont Atoms (coretemp) Various other minor improvements" * tag 'hwmon-for-v7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (42 commits) hwmon: (pmbus/mpq8785) fix VOUT_MODE mismatch during identification Revert "hwmon: (ibmpex) fix use-after-free in high/low store" hwmon: (max16065) Use READ/WRITE_ONCE to avoid compiler optimization induced race hwmon: (nct6775) use sysfs_emit instead of sprintf hwmon: pmbus: fix table in STEF48H28 documentation hwmon: Add support for HiTRON HAC300S PSU dt-bindings: trivial-devices: Add hitron,hac300s hwmon: (cros_ec) Add support for temperature thresholds hwmon: (cros_ec) Move temperature channel params to a macro hwmon: (cros_ec) Add support for fan target speed hwmon: (cros_ec) Split up supported features in the documentation hwmon: (tmp108) Add P3T1035 and P3T2030 support hwmon: (tmp108) Add support for P3T1035 and P3T2030 dt-bindings: hwmon: ti,tmp108: Add P3T1035,P3T2030 hwmon: pmbus: add support for STEF48H28 dt-bindings: hwmon: add STEF48H28 hwmon: (nct7363) Fix a resource leak in nct7363_present_pwm_fanin hwmon: (emc2305) Fix a resource leak in emc2305_of_parse_pwm_child hwmon: (gpd-fan) add support for Micro PC 2 hwmon: (coretemp) Add TjMax for Silvermont through Tremont Atoms ...

hwmon: pmbus: fix table in STEF48H28 documentation

2026-02-07T17:33:00+00:00

"make htmldocs" reports build errors/warnings: Documentation/hwmon/stef48h28.rst:45: ERROR: Missing matching underline for section title overline. ========================================================= in1_label "vin". in1_input Measured voltage. From READ_VIN register. [docutils] Documentation/hwmon/stef48h28.rst:73: WARNING: Title underline too short. temp2_input Measured temperature. From READ_TEMPERATURE_2 register. ========================================================= [docutils] Fix the table overline/underline line lengths and convert it to a 2-column table. Signed-off-by: Randy Dunlap Link: https://lore.kernel.org/r/20260128002200.1665941-1-rdunlap@infradead.org Signed-off-by: Guenter Roeck

hwmon: Add support for HiTRON HAC300S PSU

2026-02-07T17:33:00+00:00

Add Support for HiTRON HAC300S PSU. This is a AC/DC hot-swappable CompactPCI Serial Dual output active current sharing switching power supply with a 312W rating. Signed-off-by: Vasileios Amoiridis Link: https://lore.kernel.org/r/20260119190806.35276-3-vassilisamir@gmail.com [groeck: Fix whitespace / alignment problems; return -ENODATA from hac300s_read_byte_data() if the PMBus core can handle the operation] Signed-off-by: Guenter Roeck

hwmon: (cros_ec) Add support for temperature thresholds

2026-02-07T17:32:20+00:00

Implement reading temperature thresholds through EC_CMD_THERMAL_GET_THRESHOLD/EC_CMD_THERMAL_SET_THRESHOLD. Thresholds are mapped as follows between the EC and hwmon: hwmon_temp_max - EC_TEMP_THRESH_WARN hwmon_temp_crit - EC_TEMP_THRESH_HIGH hwmon_temp_emergency - EC_TEMP_THRESH_HALT Signed-off-by: Thomas Weißschuh Reviewed-by: Tzung-Bi Shih Link: https://lore.kernel.org/r/20260118-cros_ec-hwmon-pwm-v2-4-77eb1709b031@weissschuh.net [groeck: Rearrange code to no longer use unreachable() since that causes a hiccup with some versions of gcc and objtool] Signed-off-by: Guenter Roeck

hwmon: (cros_ec) Add support for fan target speed

2026-01-31T15:38:33+00:00

Use EC_CMD_PWM_GET_FAN_TARGET_RPM to retrieve the target fan speed. The EC only supports this for the first fan. Signed-off-by: Thomas Weißschuh Reviewed-by: Tzung-Bi Shih Link: https://lore.kernel.org/r/20260118-cros_ec-hwmon-pwm-v2-2-77eb1709b031@weissschuh.net Signed-off-by: Guenter Roeck

hwmon: (cros_ec) Split up supported features in the documentation

2026-01-31T15:38:33+00:00

The wall of text of supported features is hard to read and messy to extend. Split it into a definition list with an explanations for each supported feature. Signed-off-by: Thomas Weißschuh Reviewed-by: Tzung-Bi Shih Link: https://lore.kernel.org/r/20260118-cros_ec-hwmon-pwm-v2-1-77eb1709b031@weissschuh.net Signed-off-by: Guenter Roeck