How to add modified device tree with PWM control backlight

[Yli.8]

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";

};

[Olivier GALLIEN]

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 :

https://wiki.st.com/stm32mpu/wiki/PWM_overview

https://wiki.st.com/stm32mpu/wiki/TIM_device_tree_configuration

For building and applying Device Tree :

https://wiki.st.com/stm32mpu/wiki/How_to_cross-compile_with_the_Developer_Package

Hope it help

Olivier

[Yli.8]

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