您好
請教一下，我需要使用到PWM5 控制。我在 devicetree 修改如下，之後 make dtbs，並下載到板子上。
pwm5_pin_a: pwm5@0 {
pins = "PG4";
function = "pwm5";
drive-strength = <10>;
bias-pull-up;
};
pwm5_pin_b: pwm5@1 {
pins = "PG4";
function = "gpio_in";
};
&sdc1{
status = "disabled";
};
&pwm5 {
pinctrl-names = "active", "sleep";
pinctrl-0 = <&pwm5_pin_a>;
pinctrl-1 = <&pwm5_pin_b>;
status = "okay";
};
之後透過 echo 1 > /sys/class/pwm/pwmchip0/pwm5 ，啟動PWM
不過測量PG4 引腳，並無訊號輸出？