dt-bindings: pwm: Add MediaTek display PWM bindings
Document the device-tree binding of MediaTek display PWM. The PWM has one channel to control the backlight brightness for display. Both the MT8173 and MT6595 are supported. Signed-off-by: YH Huang <yh.huang@mediatek.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
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