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AM335x 的ehrpwm1使用

user6394011
Intellectual 440 points


设备树配置如下：

backlight: backlight {
status = "okay";
compatible = "pwm-backlight";
pwms = <&ehrpwm1 0 500000 0>;

brightness-levels = <0 51 53 56 62 75 101 152 255>;
default-brightness-level = <8>;
};

ehrpwm1_pins: pinmux-ehrpwm1-pins {
pinctrl-single,pins = <
AM33XX_IOPAD(0x848, PIN_OUTPUT_PULLDOWN | MUX_MODE6) /* gpmc_a2.ehrpwm1a */
AM33XX_IOPAD(0x84c, PIN_OUTPUT_PULLDOWN | MUX_MODE6) /* gpmc_a2.ehrpwm1b */
>;
};

&epwmss1 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&ehrpwm1_pins>;

ecap@48302100 {
status = "disable";
};

pwm@48302200 {
status = "okay"; /* ehrpwm1 */
};

};

把EHRPWM1A用作了背光，那如何控制EHRPWM1B的输出