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All models with the "AWCC" WMAX device support a way of manually controlling fans. The PWM duty cycle of a fan can't be controlled directly. Instead the AWCC interface let's us tune a fan `boost` value, which has the following empirically discovered, approximate behavior over the PWM value: pwm = pwm_base + (fan_boost / 255) * (pwm_max - pwm_base) Where the pwm_base is the locked PWM value controlled by the FW and fan_boost is a value between 0 and 255. Expose this fan_boost knob as a custom HWMON attribute. Cc: Guenter Roeck <linux@roeck-us.net> Cc: Jean Delvare <jdelvare@suse.com> Cc: linux-hwmon@vger.kernel.org Reviewed-by: Armin Wolf <W_Armin@gmx.de> Signed-off-by: Kurt Borja <kuurtb@gmail.com> Link: https://lore.kernel.org/r/20250329-hwm-v7-8-a14ea39d8a94@gmail.com Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
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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 reStructuredText 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.
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