kernel/linux.git/Documentation/hwmon, branch master

hwmon: add support for MCP998X

2026-04-11T07:02:13+00:00

Add driver for Microchip MCP998X/33 and MCP998XD/33D Multichannel Automotive Temperature Monitor Family. Signed-off-by: Victor Duicu Link: https://lore.kernel.org/r/20260403-add-mcp9982-hwmon-v12-2-b3bfb26ff136@microchip.com [groeck: Add missing break; to avoid build warning] Signed-off-by: Guenter Roeck

hwmon: pmbus: Add support for Sony APS-379

2026-04-10T15:26:36+00:00

Add pmbus support for Sony APS-379 power supplies. There are a few PMBUS commands that return data that is undocumented/invalid so these need to be rejected with -ENXIO. The READ_VOUT command returns data in linear11 format instead of linear16 so we need to workaround this. Signed-off-by: Chris Packham Link: https://lore.kernel.org/r/20260410012414.2818829-3-chris.packham@alliedtelesis.co.nz [groeck: Dropped empty line from documentation; added module name to Kconfig] Signed-off-by: Guenter Roeck

hwmon: (yogafan) various markup improvements

2026-04-07T13:53:03+00:00

There are several places in yogafan.rst where it appears that lines are meant to be presented on their own but instead they are strung together due to the lack of markups. Fix these issues by: - using bullets where needed - indenting continuation lines of bulleted items - using a table where appropriate - using a literal block where appropriate Fixes: c67c248ca406 ("hwmon: (yogafan) Add support for Lenovo Yoga/Legion fan monitoring") Signed-off-by: Randy Dunlap Link: https://lore.kernel.org/r/20260407052317.2097791-1-rdunlap@infradead.org Signed-off-by: Guenter Roeck

hwmon: (tmp102) add support for update interval

2026-04-03T18:10:05+00:00

Since the sensor supports different sampling intervals via bits CR0 and CR1 from the CONFIG register, add support in order for the conversion rate to be changed from user space. Default is 4 conv/sec. Signed-off-by: Flaviu Nistor Link: https://lore.kernel.org/r/20260403140654.10368-1-flaviu.nistor@gmail.com Signed-off-by: Guenter Roeck

hwmon: (yogafan) fix markup warning

2026-04-03T18:10:00+00:00

Add a blank line between the License and heading lines to prevent a documentation build warning: Documentation/hwmon/yogafan.rst:2: WARNING: Explicit markup ends without a blank line; unexpected unindent. [docutils] Fixes: c67c248ca406 ("hwmon: (yogafan) Add support for Lenovo Yoga/Legion fan monitoring") Signed-off-by: Randy Dunlap Link: https://lore.kernel.org/r/20260330214624.3781789-1-rdunlap@infradead.org Signed-off-by: Guenter Roeck

hwmon: (yogafan) Add support for Lenovo Yoga/Legion fan monitoring

2026-04-03T18:09:09+00:00

This driver provides fan speed monitoring for Lenovo Yoga, Legion, and IdeaPad laptops by interfacing with the Embedded Controller (EC) via ACPI. To address low-resolution sampling in Lenovo EC firmware, a Rate-Limited Lag (RLLag) filter is implemented. The filter ensures a consistent physical curve regardless of userspace polling frequency. Hardware identification is performed via DMI-based quirk tables, which map specific ACPI object paths and register widths (8-bit vs 16-bit) deterministically. Signed-off-by: Sergio Melas Link: https://lore.kernel.org/r/20260327221602.18832-1-sergiomelas@gmail.com [groeck: Dropped double empty line in Kconfig] Signed-off-by: Guenter Roeck

hwmon: (pmbus/isl68137) Add support for Renesas RAA228942 and RAA228943

2026-03-31T02:45:06+00:00

Add I2C device IDs for Renesas RAA228942 and RAA228943. At the Linux PMBus hwmon interface level currently supported by this driver, these devices are compatible with the existing 2-rail non-TC controllers, so devicetree will use fallback compatibles and no dedicated OF match entries are needed. Signed-off-by: Dawei Liu Link: https://lore.kernel.org/r/20260325090208.857-3-dawei.liu.jy@renesas.com Signed-off-by: Guenter Roeck

hwmon: (it87) Add support for IT8689E

2026-03-31T02:45:06+00:00

Add support for the ITE IT8689E Super I/O chip. The IT8689E supports newer autopwm, 12mV ADC, 16-bit fans, six fans, six PWM channels, PWM frequency 2, six temperature inputs, AVCC3, temperature offset, and fan on/off control. Give it8689 its own GPIO configuration block in it87_find() rather than sharing the it8620/it8628 block. The shared block reads IT87_SIO_PINX2_REG and either marks IN3 as internal AVCC or skips IN9. Because it8689 declares FEAT_AVCC3, IN9 is already marked as always-internal before the GPIO block is reached; applying the PINX2 check would either create duplicate AVCC labels on IN3 and IN9 or incorrectly skip IN9. Also update Documentation/hwmon/it87.rst and drivers/hwmon/Kconfig to document the newly supported chip. Signed-off-by: Markus Hoffmann Link: https://lore.kernel.org/r/20260322103301.18112-1-markus@thehoffs.at Signed-off-by: Guenter Roeck

docs: hwmon: ltc4282: Fix scanned addresses

2026-03-31T02:45:05+00:00

The LTC4282 driver does not implement an I2C .detect() callback, meaning no I2C address scanning is performed. Update the documentation to reflect this by replacing the listed I2C address ranges with "-". Signed-off-by: Nuno Sá Link: https://lore.kernel.org/r/20260304-hwmon-ltc4282-minor-improvs-v1-1-344622924d3a@analog.com Signed-off-by: Guenter Roeck

hwmon: Add LattePanda Sigma EC driver

2026-03-31T02:45:05+00:00

Add hardware monitoring support for the LattePanda Sigma SBC (DFRobot, ITE IT8613E EC). The driver reads fan speed and temperatures via direct port I/O, as the BIOS disables the ACPI EC interface. Signed-off-by: Mariano Abad Signed-off-by: Guenter Roeck