T113 在boot阶段关闭PWM7 在内核启动打开PWM7 配置如下 但是在uboot 和linux启动都没有开启背光
现在在uboot和linux测量PD22管脚电压都是0 各位大佬 帮我看下哦
我的配置如下uboot-board.dts
&pwm7_pin_a {
pins = "PD22";
function = "pwm7";
muxsel = <5>;
drive-strength = <10>;
bias-pull-up;
};
&pwm7_pin_b {
pins = "PD22";
muxsel = <5>;
function = "gpio_out";
bias-pull-up;
};
&pwm7 {
pinctrl-names = "active", "sleep";
pinctrl-0 = <&pwm7_pin_a>;
pinctrl-1 = <&pwm7_pin_b>;
status = "okay";
};
内核配置如下
pwm7_pin_a: pwm7@0 {
pins = "PD22";
function = "pwm7";
muxsel = <5>;
drive-strength = <10>;
bias-pull-up;
};
pwm7_pin_b: pwm7@1 {
pins = "PD22";
function = "gpio_out";
bias-pull-up;
};
&pwm7 {
pinctrl-names = "active", "sleep";
pinctrl-0 = <&pwm7_pin_a>;
pinctrl-1 = <&pwm7_pin_b>;
status = "okay";
};
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