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How to add modified device tree with PWM control backlight

Yli.8
Associate II

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";

};

4 REPLIES 4

Which chip are you talking about?

JW

I use stm32mp157aac, may I ask how to configure PWM control backlight

You should probably ask this question in a different forum https://community.st.com/s/topic/0TO0X0000003u2AWAQ/stm32-mpus

JW

I think maybe I made a mistake