GPIO LED configuration

For Developers
1

I want to use GPIO LEDs on the WizFi630a module. In the DTS I have this:

gpio-leds {
compatible = "gpio-leds";

  run {
  	label = "wizfi630a::run";
  	gpios = <&gpio0 21 GPIO_ACTIVE_LOW>;
  };

  wifi {
  	label = "wizfi630a::wifi";
  	gpios = <&gpio0 18 GPIO_ACTIVE_LOW>;
  };

};

But the LEDs doesn't show up in /sys/class/leds/.

I have this error message in the logs:

leds-gpio: probe of gpio-leds failed with error -16

What do I do wrong?

Thanks,
Levente

2

Are the GPIOs themselves enabled by your DTS (or something it includes)? Often there is a driver for the GPIO subsystem that needs to b configured as well, gpio0 in this case.

3

Jeff, thank you for the reply. It turned out that there was a typo in the DTS.

4

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