How to add modified device tree with PWM control backlight

My circuit board USES PE6 to control the backlight, but it cannot be adjusted. How to modify the device tree of TIM15_CH2.EV1 is not regulated.

EV1:

panel_backlight: panel-backlight {

compatible = "gpio-backlight";

gpios = <&gpiod 13 GPIO_ACTIVE_LOW>;

default-on;

status = "okay";

};

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Technical Moderator

Hi @昌�?� �?�

It's not clear to me if you need help to write the device tree or to compile/load it to your system.

Anyway, if not done please refer to following link which might help you.

For Device tree modification around Timer/PWM :

For building and applying Device Tree :

Hope it help

Olivier

Yli.8Author

Visitor II

Sorry, what I want to explain is how to use PWM to control backlight?

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