gpio-leds

Note

An implementation of a driver matching this compatible is available in drivers/led/led_gpio.c.

Description

This allows you to define a group of LEDs. Each LED in the group is
controlled by a GPIO. Each LED is defined in a child node of the
gpio-leds node.

Here is an example which defines three LEDs in the node /leds:

/ {
     leds {
             compatible = "gpio-leds";
             led_0 {
                     gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
             };
             led_1 {
                     gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>;
             };
             led_2 {
                     gpios = <&gpio1 15 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
             };
     };
};

Above:

- led_0 is pin 1 on gpio0. The LED is on when the pin is low,
  and off when the pin is high.
- led_1 is pin 2 on gpio0. The LED is on when the pin is high,
  and off when it is low.
- led_2 is pin 15 on gpio1. The LED is on when the pin is low,
  and the pin's internal pull-up resistor should be enabled.

Properties

Top level properties

No top-level properties.

Child node properties

Name	Type	Details
`gpios`	`phandle-array`	This property is required.
`label`	`string`	Human readable string describing the LED. It can be used by an application to identify this LED or to retrieve its number/index (i.e. child node number) on the parent device. See Important properties for more information.