kernel/drivers/hwmon/Makefile, branch linux-6.9.y

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

2024-03-07T18:50:16Z

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 Link: https://lore.kernel.org/r/20240221104025.1306227-4-billy_tsai@aspeedtech.com Signed-off-by: Guenter Roeck

hwmon: Add driver for Astera Labs PT5161L retimer

2024-02-25T20:37:37Z

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 Link: https://lore.kernel.org/r/20240206125420.3884300-2-chou.cosmo@gmail.com Signed-off-by: Guenter Roeck

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

2024-02-25T20:37:37Z

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 Signed-off-by: Aleksa Savic Link: https://lore.kernel.org/r/20240108094453.22986-1-savicaleksa83@gmail.com [groeck: Add HID dependency] Signed-off-by: Guenter Roeck

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

2024-02-25T20:37:37Z

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 Signed-off-by: Jonas Malaco Co-developed-by: Yury Zhuravlev Signed-off-by: Yury Zhuravlev Signed-off-by: Aleksa Savic Link: https://lore.kernel.org/r/20240129111932.368232-1-savicaleksa83@gmail.com Signed-off-by: Guenter Roeck

hwmon: Add support for Amphenol ChipCap 2

2024-02-25T20:37:37Z

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 Link: https://lore.kernel.org/r/20240130-topic-chipcap2-v6-5-260bea05cf9b@gmail.com Signed-off-by: Guenter Roeck

hwmon: add fan speed monitoring driver for Surface devices

2024-02-25T20:37:36Z

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 Link: https://github.com/linux-surface/kernel/pull/144 Reviewed-by: Maximilian Luz Reviewed-by: Armin Wolf Link: https://lore.kernel.org/r/20240131005856.10180-2-ivor@iwanders.net [groeck: - Declare surface_fan_hwmon_is_visible() static - Add dependency on SURFACE_AGGREGATOR_BUS ] Signed-off-by: Guenter Roeck

hwmon: Add driver for LTC4282

2024-02-25T20:37:10Z

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 Link: https://lore.kernel.org/r/20240129-b4-ltc4282-support-v4-3-fe75798164cc@analog.com [groeck: clamp value range in ltc4282_write_voltage_byte_cached()] Signed-off-by: Guenter Roeck

hwmon: Add driver for Gigabyte AORUS Waterforce AIO coolers

2024-01-02T16:44:57Z

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 Link: https://lore.kernel.org/r/20231207122402.107032-1-savicaleksa83@gmail.com Signed-off-by: Guenter Roeck

hwmon: Add driver for ltc2991

2023-10-30T05:22:20Z

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 Link: https://lore.kernel.org/r/20231026103413.27800-2-antoniu.miclaus@analog.com [groeck: Fixed up documentation warning] Signed-off-by: Guenter Roeck

hwmon: add POWER-Z driver

2023-10-27T14:27:23Z

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 Link: https://lore.kernel.org/r/20230902-powerz-v4-1-7ec2c1440687@weissschuh.net [groeck: Release urb after hwmon registration error; Move priv->status initialization to correct place before reinit_completion ] Signed-off-by: Guenter Roeck