* [Core] Allow customizing PWM frequency
Some frequencies can cause audible noise. Changing the frequency
eliminates that.
Signed-off-by: Daniel Schaefer <dhs@frame.work>
* docs/feature-backlight: Mention PWM frequency
Signed-off-by: Daniel Schaefer <dhs@frame.work>
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Signed-off-by: Daniel Schaefer <dhs@frame.work>