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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>;
};
};
};