Configure custom I/O in the devicetree

RE: Configure custom I/O in the devicetree

Einar Thorsrud — Thu, 19 Dec 2024 13:31:45 GMT

Hi,

Thank you for the feedback. I have forwarded it internally so that we can look at how labels are supported on generic GPIO pins.

RE: Configure custom I/O in the devicetree

john.liu — Thu, 19 Dec 2024 05:08:18 GMT

Hi:

After I configure it like this:

sim: sim-pin {

gpios = <&gpio0 10 0>;

label = "sim pin";

};

But after this configuration, I can't see sim pin.

RE: Configure custom I/O in the devicetree

rbmarcus — Wed, 18 Dec 2024 17:59:19 GMT

The labels used for the LEDs are properties.

The text view of the DeviceTree resolves some of the ambiguity:

/ {
	model = "Nordic nRF52840 DK NRF52840";
	compatible = "nordic,nrf52840-dk-nrf52840";
...
	leds {
		compatible = "gpio-leds";
		led0: led_0 {
			gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
			label = "Green LED 0";
		};
		led1: led_1 {
			gpios = <&gpio0 14 GPIO_ACTIVE_LOW>;
			label = "Green LED 1";
		};
		led2: led_2 {
			gpios = <&gpio0 15 GPIO_ACTIVE_LOW>;
			label = "Green LED 2";
		};
		led3: led_3 {
			gpios = <&gpio0 16 GPIO_ACTIVE_LOW>;
			label = "Green LED 3";
		};
	};
...

Although, I'm pretty sure you don't need either type of label to configure a GPIO.