hwmon: add driver for HTU31

Add base support for HTU31 temperature and humidity sensor.

Besides temperature and humidity values, the driver also exports a 24-bit
heater control to sysfs and serial

hwmon: add driver for HTU31

Add base support for HTU31 temperature and humidity sensor.

Besides temperature and humidity values, the driver also exports a 24-bit
heater control to sysfs and serial number to debugfs.

Signed-off-by: Andrei Lalaev <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[groeck: Fixed continuation line alignment]
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: Add Congatec Board Controller monitoring driver

Add support for the Congatec Board Controller. This controller exposes
temperature, voltage, current and fan sensors.

The available sensors li

hwmon: Add Congatec Board Controller monitoring driver

Add support for the Congatec Board Controller. This controller exposes
temperature, voltage, current and fan sensors.

The available sensors list cannot be predicted. Some sensors can be
present or not, depending the system.
The driver has an internal list of all possible sensors, for all Congatec
boards. The Board Controller gives to the driver its sensors list, and
their status (active or not).

Signed-off-by: Thomas Richard <[email protected]>
Link: https://lore.kernel.org/r/20250203-congatec-board-controller-hwmon-v4-1-ff6c76a4662c@bootlin.com
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: add driver for the hwmon parts of qnap-mcu devices

The MCU can be found on network-attached-storage devices made by QNAP
and provides access to fan control including reading back its RPM as
w

hwmon: add driver for the hwmon parts of qnap-mcu devices

The MCU can be found on network-attached-storage devices made by QNAP
and provides access to fan control including reading back its RPM as
well as reading the temperature of the NAS case.

Signed-off-by: Heiko Stuebner <[email protected]>
Acked-by: Guenter Roeck <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lee Jones <[email protected]>

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hwmon: Add driver for I2C chip Nuvoton NCT7363Y

The NCT7363Y is a fan controller which provides up to 16
independent FAN input monitors. It can report each FAN input count
values. The NCT7363Y also

hwmon: Add driver for I2C chip Nuvoton NCT7363Y

The NCT7363Y is a fan controller which provides up to 16
independent FAN input monitors. It can report each FAN input count
values. The NCT7363Y also provides up to 16 independent PWM
outputs. Each PWM can output specific PWM signal by manual mode to
control the FAN duty outside.

Signed-off-by: Ban Feng <[email protected]>
Message-ID: <[email protected]>
[groeck: Dropped unnecessary variable initialization, and , after { }]
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: (isl28022) new driver for ISL28022 power monitor

Driver for Renesas ISL28022 power monitor with I2C interface.
The device monitors voltage, current via shunt resistor
and calculated power.

S

hwmon: (isl28022) new driver for ISL28022 power monitor

Driver for Renesas ISL28022 power monitor with I2C interface.
The device monitors voltage, current via shunt resistor
and calculated power.

Signed-off-by: Carsten Spieß <[email protected]>
Signed-off-by: Yikai Tsai <[email protected]>
Message-ID: <[email protected]>
[groeck: Fixed alignment issues, dropped noise at end of probe]
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: Add sophgo SG2042 external hardware monitor support

SG2042 use an external MCU to provide basic hardware information
and thermal sensors.

Add driver support for the onboard MCU of SG2042.

S

hwmon: Add sophgo SG2042 external hardware monitor support

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 <[email protected]>
Message-ID: <IA1PR20MB49536C786048D1E676BB9C20BB822@IA1PR20MB4953.namprd20.prod.outlook.com>
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: Add thermal sensor driver for Surface Aggregator Module

Some of the newer Microsoft Surface devices (such as the Surface Book
3 and Pro 9) have thermal sensors connected via the Surface Aggre

hwmon: Add thermal sensor driver for Surface Aggregator Module

Some of the newer Microsoft Surface devices (such as the Surface Book
3 and Pro 9) have thermal sensors connected via the Surface Aggregator
Module (the embedded controller on those devices). Add a basic driver
to read out the temperature values of those sensors.

The EC can have up to 16 thermal sensors connected via a single
sub-device, each providing temperature readings and a label string.

Link: https://github.com/linux-surface/surface-aggregator-module/issues/59
Reviewed-by: Hans de Goede <[email protected]>
Co-developed-by: Ivor Wanders <[email protected]>
Signed-off-by: Ivor Wanders <[email protected]>
Signed-off-by: Maximilian Luz <[email protected]>
Message-ID: <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: Remove obsolete adm1021 and max6642 drivers

ADM1021, MAX6642, and compatible chips are supported by the lm90 driver.
Remove the obsolete stand-alone drivers to reduce maintenance overhead.

R

hwmon: Remove obsolete adm1021 and max6642 drivers

ADM1021, MAX6642, and compatible chips are supported by the lm90 driver.
Remove the obsolete stand-alone drivers to reduce maintenance overhead.

Reviewed-by: Tzung-Bi Shih <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: Add support for SPD5118 compliant temperature sensors

Add support for SPD5118 (Jedec JESD300) compliant temperature
sensors. Such sensors are typically found on DDR5 memory modules.

Cc: René

hwmon: Add support for SPD5118 compliant temperature sensors

Add support for SPD5118 (Jedec JESD300) compliant temperature
sensors. Such sensors are typically found on DDR5 memory modules.

Cc: René Rebe <[email protected]>
Cc: Thomas Weißschuh <[email protected]>
Reviewed-by: Thomas Weißschuh <[email protected]>
Tested-by: Thomas Weißschuh <[email protected]>
Tested-by: Stephen Horvath <[email protected]>
Tested-by: Armin Wolf <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: add ChromeOS EC driver

The ChromeOS Embedded Controller exposes fan speed and temperature
readings.
Expose this data through the hwmon subsystem.

The driver is designed to be probed via the

hwmon: add ChromeOS EC driver

The ChromeOS Embedded Controller exposes fan speed and temperature
readings.
Expose this data through the hwmon subsystem.

The driver is designed to be probed via the cros_ec mfd device.

Signed-off-by: Thomas Weißschuh <[email protected]>
Acked-by: Guenter Roeck <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[tzungbi: Fixed typo in MAINTAINERS: "chros_ec_hwmon" -> "cros_ec_hwmon"]
Signed-off-by: Tzung-Bi Shih <[email protected]>

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hwmon: Add EC Chip driver for Lenovo ThinkStation motherboards

This addition adds in the ability for the system to scan
the EC chip in the Lenovo ThinkStation systems to get the
current fan RPM spee

hwmon: Add EC Chip driver for Lenovo ThinkStation motherboards

This addition adds in the ability for the system to scan
the EC chip in the Lenovo ThinkStation systems to get the
current fan RPM speeds the Maximum speed value for each
fan also provides the CPU, DIMM other thermal statuses

Signed-off-by: David Ober <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[groeck: Dropped pointless case statements]
[Colin King: Fixed spelling error accesssible -> accessible]
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: (aspeed-g6-pwm-tacho): Support for ASPEED g6 PWM/Fan tach

The driver support two functions: PWM and Tachometer. The PWM feature can
handle up to 16 output ports, while the Tachometer can moni

hwmon: (aspeed-g6-pwm-tacho): Support for ASPEED g6 PWM/Fan tach

The driver support two functions: PWM and Tachometer. The PWM feature can
handle up to 16 output ports, while the Tachometer can monitor to up to 16
input ports as well. This driver implements them by exposing two kernel
subsystems: PWM and HWMON. The PWM subsystem can be utilized alongside
existing drivers for controlling elements such as fans (pwm-fan.c),
beepers (pwm-beeper.c) and so on. Through the HWMON subsystem, the driver
provides sysfs interfaces for fan.

Signed-off-by: Billy Tsai <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: Add driver for Astera Labs PT5161L retimer

This driver implements support for temperature monitoring of Astera Labs
PT5161L series PCIe retimer chips.

This driver implementation originates f

hwmon: Add driver for Astera Labs PT5161L retimer

This driver implements support for temperature monitoring of Astera Labs
PT5161L series PCIe retimer chips.

This driver implementation originates from the CSDK available at
Link: https://github.com/facebook/openbmc/tree/helium/common/recipes-lib/retimer-v2.14
The communication protocol utilized is based on the I2C/SMBus standard.

Signed-off-by: Cosmo Chou <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: Add driver for ASUS ROG RYUJIN II 360 AIO cooler

This driver exposes hardware sensors of the ASUS ROG RYUJIN II 360
all-in-one CPU liquid cooler, which communicates through a proprietary
USB

hwmon: Add driver for ASUS ROG RYUJIN II 360 AIO cooler

This driver exposes hardware sensors of the ASUS ROG RYUJIN II 360
all-in-one CPU liquid cooler, which communicates through a proprietary
USB HID protocol. Report offsets were initially discovered in [1] by
Florian Freudiger.

Available sensors are pump, internal and external
(controller) fan speed in RPM, their duties in PWM, as well as
coolant temperature.

Attaching external fans to the controller is optional and allows them
to be controlled from the device. If not connected, the fan-related
sensors will report zeroes. The controller is a separate hardware unit
that comes bundled with the AIO and connects to it to allow fan control.

The addressable LCD screen is not supported in this
driver and should be controlled through userspace tools.

[1]: https://github.com/liquidctl/liquidctl/pull/653

Tested-by: Florian Freudiger <[email protected]>
Signed-off-by: Aleksa Savic <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[groeck: Add HID dependency]
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: Add driver for NZXT Kraken X and Z series AIO CPU coolers

This driver enables hardware monitoring support for NZXT Kraken
X53/X63/X73 and Z53/Z63/Z73 all-in-one CPU liquid coolers.

All model

hwmon: Add driver for NZXT Kraken X and Z series AIO CPU coolers

This driver enables hardware monitoring support for NZXT Kraken
X53/X63/X73 and Z53/Z63/Z73 all-in-one CPU liquid coolers.

All models expose liquid temperature and pump speed (in RPM), as well as
PWM control (natively only through a temp-PWM curve, but the driver also
emulates fixed PWM control on top of that). The Z-series models
additionally expose the speed and duty of an optionally connected fan,
with the same PWM control capabilities.

Pump and fan duty control mode can be set through pwm[1-2]_enable,
where 1 is for the manual control mode and 2 is for the liquid temp
to PWM curve mode. Writing a 0 disables control of the channel through
the driver after setting its duty to 100%. As it is not possible to query
the device for the active mode, the driver keeps track of it.

The temperature of the curves relates to the fixed [20-59] C range, per
device limitations, and correlating to the detected liquid temperature.
Only PWM values (ranging from 0-255) can be set.

The addressable RGB LEDs and LCD screen, included only on Z-series models,
are not supported in this driver.

Co-developed-by: Jonas Malaco <[email protected]>
Signed-off-by: Jonas Malaco <[email protected]>
Co-developed-by: Yury Zhuravlev <[email protected]>
Signed-off-by: Yury Zhuravlev <[email protected]>
Signed-off-by: Aleksa Savic <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: Add support for Amphenol ChipCap 2

The Amphenol ChipCap 2 is a capacitive polymer humidity and temperature
sensor with an integrated EEPROM and minimum/maximum humidity alarms.

All device va

hwmon: Add support for Amphenol ChipCap 2

The Amphenol ChipCap 2 is a capacitive polymer humidity and temperature
sensor with an integrated EEPROM and minimum/maximum humidity alarms.

All device variants offer an I2C interface and depending on the part
number, two different output modes:
- CC2D: digital output
- CC2A: analog (PDM) output

This driver adds support for the digital variant (CC2D part numbers),
which includes the following part numbers:
- non-sleep measurement mode (CC2D23, CC2D25, CC2D33, CC2D35)
- sleep measurement mode (CC2D23S, CC2D25S, CC2D33S, CC2D35S)

The Chipcap 2 EEPROM can be accessed to configure a series of parameters
like the minimum/maximum humidity alarm threshold and hysteresis. The
EEPROM is only accessible in the command window after a power-on reset.
The default window lasts 10 ms if no Start_CM command is sent. After the
command window is finished (either after the mentioned timeout of after
a Start_NOM command is sent), the device enters the normal operation
mode and makes a first measurement automatically.

Unfortunately, the device does not provide any hardware or software
reset and therefore the driver must trigger power cycles to enter the
command mode. A dedicated, external regulator is required for that.

This driver keeps the device off until a measurement or access to the
EEPROM is required, making use of the first automatic measurement to
avoid different code paths for sleep and non-sleep devices.

The minimum and maximum humidity alarms are configured with two
registers per alarm: one stores the alarm threshold and the other one
keeps the value that turns off the alarm. The alarm signals are only
updated when a measurement is carried out.

Signed-off-by: Javier Carrasco <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: add fan speed monitoring driver for Surface devices

Adds a driver that provides read only access to the fan speed for Microsoft
Surface Pro devices. The fan speed is always regulated by the E

hwmon: add fan speed monitoring driver for Surface devices

Adds a driver that provides read only access to the fan speed for Microsoft
Surface Pro devices. The fan speed is always regulated by the EC and cannot
be influenced directly.

Signed-off-by: Ivor Wanders <[email protected]>
Link: https://github.com/linux-surface/kernel/pull/144
Reviewed-by: Maximilian Luz <[email protected]>
Reviewed-by: Armin Wolf <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[groeck:
- Declare surface_fan_hwmon_is_visible() static
- Add dependency on SURFACE_AGGREGATOR_BUS
]
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: Add driver for LTC4282

The LTC4282 hot swap controller allows a board to be safely inserted and
removed from a live backplane. Using one or more external N-channel pass
transistors, board sup

hwmon: Add driver for LTC4282

The LTC4282 hot swap controller allows a board to be safely inserted and
removed from a live backplane. Using one or more external N-channel pass
transistors, board supply voltage and inrush current are ramped up at an
adjustable rate. An I2C interface and onboard ADC allows for monitoring
of board current, voltage, power, energy and fault status.

Signed-off-by: Nuno Sa <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[groeck: clamp value range in ltc4282_write_voltage_byte_cached()]
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: Add driver for Gigabyte AORUS Waterforce AIO coolers

This driver exposes hardware sensors of the Gigabyte AORUS Waterforce
all-in-one CPU liquid coolers, which communicate through a proprieta

hwmon: Add driver for Gigabyte AORUS Waterforce AIO coolers

This driver exposes hardware sensors of the Gigabyte AORUS Waterforce
all-in-one CPU liquid coolers, which communicate through a proprietary
USB HID protocol. Report offsets were initially discovered in [1] and
confirmed by me on a Waterforce X240 by observing the sent reports from
the official software.

Available sensors are pump and fan speed in RPM, as well as coolant
temperature. Also available through debugfs is the firmware version.

Attaching a fan is optional and allows it to be controlled from the
device. If it's not connected, the fan-related sensors will report
zeroes.

The addressable RGB LEDs and LCD screen are not supported in this
driver and should be controlled through userspace tools.

[1]: https://github.com/liquidctl/liquidctl/issues/167

Signed-off-by: Aleksa Savic <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: Add driver for ltc2991

Add support for LTC2991 Octal I2C Voltage, Current, and Temperature
Monitor.

The LTC2991 is used to monitor system temperatures, voltages and
currents. Through the I2C

hwmon: Add driver for ltc2991

Add support for LTC2991 Octal I2C Voltage, Current, and Temperature
Monitor.

The LTC2991 is used to monitor system temperatures, voltages and
currents. Through the I2C serial interface, the eight monitors can
individually measure supply voltages and can be paired for
differential measurements of current sense resistors or temperature
sensing transistors. Additional measurements include internal
temperature and internal VCC.

Signed-off-by: Antoniu Miclaus <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[groeck: Fixed up documentation warning]
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: add POWER-Z driver

POWER-Z is a series of devices to monitor power characteristics of
USB-C connections and display those on a on-device display.
Some of the devices, notably KM002C and KM003

hwmon: add POWER-Z driver

POWER-Z is a series of devices to monitor power characteristics of
USB-C connections and display those on a on-device display.
Some of the devices, notably KM002C and KM003C, contain an additional
port which exposes the measurements via USB.

This is a driver for this monitor port.

It was developed and tested with the KM003C.

Signed-off-by: Thomas Weißschuh <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[groeck:
Release urb after hwmon registration error;
Move priv->status initialization to correct place before reinit_completion
]
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: Add driver for Renesas HS3001

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 r

hwmon: Add driver for Renesas HS3001

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 <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[groeck: Cosmetic documentation fixup; added documentation to index;
replaced probe_new with probe dropped unused variable]
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: Remove smm665 driver

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

hwmon: Remove smm665 driver

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 <[email protected]>

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hwmon: add HP WMI Sensors driver

Hewlett-Packard (and some HP Compaq) business-class computers report
hardware monitoring information via WMI. This driver exposes that
information to hwmon.

Initial

hwmon: add HP WMI Sensors driver

Hewlett-Packard (and some HP Compaq) business-class computers report
hardware monitoring information via WMI. This driver exposes that
information to hwmon.

Initial support is provided for temperature, fan speed, and intrusion
sensor types. Provisional support is provided for voltage and current
sensor types.

HP's WMI implementation permits many other types of numeric sensors.
Therefore, a debugfs interface is also provided to enumerate and
inspect all numeric sensors visible on the WMI side. This should
facilitate adding support for other sensor types in the future.

Tested on a HP Z420, a HP EliteOne 800 G1, and a HP Compaq Elite 8300
SFF.

Note that provisionally supported sensor types are untested and seem
to be rare-to-nonexistent in the wild, having been encountered
neither on test systems nor in ACPI dumps from the Linux Hardware
Database. They are included because their popularity in general makes
their presence on past or future HP systems plausible and because no
doubt exists as to how the sensors themselves would be represented in
WMI (alarm attributes will need to wait for hardware to be located).
A 2005 HP whitepaper gives the relevant sensor object MOF definition
and sensor value scaling calculation, and both this driver and the
official HP Performance Advisor utility comply with them (confirmed
in the latter case by reverse engineering).

Link: https://h20331.www2.hp.com/hpsub/downloads/cmi_whitepaper.pdf
Signed-off-by: James Seo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[groeck: Set error return value for intrusion writes to -EINVAL.
Always accept writes of 0 even if there was no intrusion. ]
Signed-off-by: Guenter Roeck <[email protected]>

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hwmon: Add MAX31827 driver

MAX31827 is a low-power temperature switch with I2C interface.

The device is a ±1°C accuracy from -40°C to +125°C
(12 bits) local temperature switch and sensor with I2C/S

hwmon: Add MAX31827 driver

MAX31827 is a low-power temperature switch with I2C interface.

The device is a ±1°C accuracy from -40°C to +125°C
(12 bits) local temperature switch and sensor with I2C/SM-
Bus interface. The combination of small 6-bump wafer-lev-
el package (WLP) and high accuracy makes this temper-
ature sensor/switch ideal for a wide range of applications.

Signed-off-by: Daniel Matyas <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[groeck: Improved define alignment, return -EINVAL after bad user input,
fixed up compatible statement]
Signed-off-by: Guenter Roeck <[email protected]>

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