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c8f55be4a1
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>
40 lines
938 B
ReStructuredText
40 lines
938 B
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0
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Kernel driver lan966x-hwmon
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===========================
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Supported chips:
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* Microchip LAN9668 (sensor in SoC)
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Prefix: 'lan9668-hwmon'
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Datasheet: https://microchip-ung.github.io/lan9668_reginfo
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Authors:
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Michael Walle <michael@walle.cc>
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Description
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-----------
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This driver implements support for the Microchip LAN9668 on-chip
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temperature sensor as well as its fan controller. It provides one
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temperature sensor and one fan controller. The temperature range
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of the sensor is specified from -40 to +125 degrees Celsius and
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its accuracy is +/- 5 degrees Celsius. The fan controller has a
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tacho input and a PWM output with a customizable PWM output
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frequency ranging from ~20Hz to ~650kHz.
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No alarms are supported by the SoC.
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The driver exports temperature values, fan tacho input and PWM
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settings via the following sysfs files:
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**temp1_input**
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**fan1_input**
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**pwm1**
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**pwm1_freq**
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