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5882d65c16
RockPro64 has a dedicated circuit for driving a 12V fan from PWM1. At the moment this makes fan spin at full speed. fancontrol can be used to control fan speed. E.g. the following config file works well: INTERVAL=10 DEVPATH=hwmon0=devices/platform/pwm-fan DEVNAME=hwmon0=pwmfan FCTEMPS=hwmon0/device/pwm1=../thermal/thermal_zone0/temp MINTEMP=hwmon0/device/pwm1=40 MAXTEMP=hwmon0/device/pwm1=60 MINSTART=hwmon0/device/pwm1=100 MINSTOP=hwmon0/device/pwm1=70 In the future it would be nice to define trip points in dts file, so that kernel could adjust fan speed itself. Signed-off-by: Andrius Štikonas <andrius@stikonas.eu> Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.