如何在PM8550的 GPIO8 启动PWM的功能

[阿尔多利亚]

如何在PM8550的 GPIO8  启动PWM的功能

[weixin_38498942]

PM8550是QCS8550 SOC的电源芯片, 所以我们需要找到对应的dtsi, 然后在dtsi中配置以下的代码, 然后就可以输出pwm的波形:

&pm8550_gpios {
    lcd_backlight_ctrl {
    lcd_backlight_ctrl_default: lcd_backlight_ctrl_default {
        pins = "gpio8";
        function = "func1";
        input-disable;
        output-enable;
        bias-disable;
        power-source = <0>;
        qcom,drive-strength = <2>;
    };
  };
};