RE: Inverted PWM channels in DeviceTree

Sigurd — Thu, 20 Aug 2020 14:37:07 GMT

Hi,

Looking at the thingy91_nrf9160_common.dts for Thingy:91, I don't see 'pwms' used. But, If you are using PWM0 for RGB control, similar to how it's done in the Thingy:91 dts file,snippet:

/* PWM0 is intended for RGB LED control */
&pwm0 {
	status = "okay";
	ch0-pin = <29>;
	ch1-pin = <30>;
	ch2-pin = <31>;
};

Then, you can try to set chx-inverted; for the x pins you need to be inverted:

Snippet:

/* PWM0 is intended for RGB LED control */
&pwm0 {
	status = "okay";
	ch0-pin = <29>;
	ch0-inverted;
	ch1-pin = <30>;
	ch1-inverted;
	ch2-pin = <31>;
	ch2-inverted;
};