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# SPDX-License-Identifier: GPL-2.0-only
%YAML 1.2
---
$id: http://devicetree.org/schemas/leds/leds-gpio.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: LEDs connected to GPIO lines
maintainers:
- Jacek Anaszewski <jacek.anaszewski@gmail.com>
- Pavel Machek <pavel@ucw.cz>
description:
Each LED is represented as a sub-node of the gpio-leds device. Each
node's name represents the name of the corresponding LED.
properties:
compatible:
const: gpio-leds
patternProperties:
# The first form is preferred, but fall back to just 'led' anywhere in the
# node name to at least catch some child nodes.
"(^led-[0-9a-f]$|led)":
type: object
allOf:
- $ref: common.yaml#
properties:
gpios:
maxItems: 1
retain-state-suspended:
description:
The suspend state can be retained.Such as charge-led gpio.
type: boolean
retain-state-shutdown:
description:
Retain the state of the LED on shutdown. Useful in BMC systems, for
example when the BMC is rebooted while the host remains up.
type: boolean
required:
- gpios
additionalProperties: false
examples:
- |
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/leds/common.h>
leds {
compatible = "gpio-leds";
led-0 {
gpios = <&mcu_pio 0 GPIO_ACTIVE_LOW>;
linux,default-trigger = "disk-activity";
function = LED_FUNCTION_DISK;
};
led-1 {
gpios = <&mcu_pio 1 GPIO_ACTIVE_HIGH>;
/* Keep LED on if BIOS detected hardware fault */
default-state = "keep";
function = LED_FUNCTION_FAULT;
};
};
run-control {
compatible = "gpio-leds";
led-0 {
gpios = <&mpc8572 6 GPIO_ACTIVE_HIGH>;
color = <LED_COLOR_ID_RED>;
default-state = "off";
};
led-1 {
gpios = <&mpc8572 7 GPIO_ACTIVE_HIGH>;
color = <LED_COLOR_ID_GREEN>;
default-state = "on";
};
};
...
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