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| author | Michael Walle <michael@walle.cc> | 2022-04-01 23:40:32 +0200 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2022-05-22 11:32:30 -0700 |
| commit | c8f55be4a1c7b4f64ecac1369e55f366b7f03bd2 (patch) | |
| tree | d14d6eee5bd158056cef5b9a37784e0ef30e7e4e /Documentation/hwmon | |
| parent | ede7e1c20b7533d89259027595fe4e0096b827c9 (diff) | |
| download | linux-rpi-c8f55be4a1c7b4f64ecac1369e55f366b7f03bd2.tar.gz linux-rpi-c8f55be4a1c7b4f64ecac1369e55f366b7f03bd2.tar.bz2 linux-rpi-c8f55be4a1c7b4f64ecac1369e55f366b7f03bd2.zip | |
hwmon: add driver for the Microchip LAN966x SoC
Add support for the temperatur sensor and the fan controller on the
Microchip LAN966x SoC. Apparently, an Analog Bits PVT sensor is used
which can measure temperature and process voltages. But only a forumlae
for the temperature sensor is known. Additionally, the SoC support a fan
tacho input as well as a PWM signal to control the fan.
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220401214032.3738095-5-michael@walle.cc
[groeck: Added missing reference in Documentation/hwmon/index.rst]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/index.rst | 1 | ||||
| -rw-r--r-- | Documentation/hwmon/lan966x.rst | 40 |
2 files changed, 41 insertions, 0 deletions
diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index 355c682f9ec4..a72c16872ec2 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -90,6 +90,7 @@ Hardware Monitoring Kernel Drivers jc42 k10temp k8temp + lan966x lineage-pem lm25066 lm63 diff --git a/Documentation/hwmon/lan966x.rst b/Documentation/hwmon/lan966x.rst new file mode 100644 index 000000000000..1d1724afa5d2 --- /dev/null +++ b/Documentation/hwmon/lan966x.rst @@ -0,0 +1,40 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Kernel driver lan966x-hwmon +=========================== + +Supported chips: + + * Microchip LAN9668 (sensor in SoC) + + Prefix: 'lan9668-hwmon' + + Datasheet: https://microchip-ung.github.io/lan9668_reginfo + +Authors: + + Michael Walle <michael@walle.cc> + +Description +----------- + +This driver implements support for the Microchip LAN9668 on-chip +temperature sensor as well as its fan controller. It provides one +temperature sensor and one fan controller. The temperature range +of the sensor is specified from -40 to +125 degrees Celsius and +its accuracy is +/- 5 degrees Celsius. The fan controller has a +tacho input and a PWM output with a customizable PWM output +frequency ranging from ~20Hz to ~650kHz. + +No alarms are supported by the SoC. + +The driver exports temperature values, fan tacho input and PWM +settings via the following sysfs files: + +**temp1_input** + +**fan1_input** + +**pwm1** + +**pwm1_freq** |