mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-24 20:13:39 +00:00
53 lines
1.5 KiB
Text
53 lines
1.5 KiB
Text
|
LEDs connected to GPIO lines
|
||
|
|
|
||
|
|
Required properties:
|
||
|
|
- compatible : should be "gpio-leds".
|
||
|
|
|
||
|
|
Each LED is represented as a sub-node of the gpio-leds device. Each
|
||
|
|
node's name represents the name of the corresponding LED.
|
||
|
|
|
||
|
|
LED sub-node properties:
|
||
|
|
- gpios : Should specify the LED's GPIO, see "gpios property" in
|
||
|
|
Documentation/devicetree/bindings/gpio/gpio.txt. Active low LEDs should be
|
||
|
|
indicated using flags in the GPIO specifier.
|
||
|
|
- label : (optional)
|
||
|
|
see Documentation/devicetree/bindings/leds/common.txt
|
||
|
|
- linux,default-trigger : (optional)
|
||
|
|
see Documentation/devicetree/bindings/leds/common.txt
|
||
|
|
- default-state: (optional) The initial state of the LED. Valid
|
||
|
|
values are "on", "off", and "keep". If the LED is already on or off
|
||
|
|
and the default-state property is set the to same value, then no
|
||
|
|
glitch should be produced where the LED momentarily turns off (or
|
||
|
|
on). The "keep" setting will keep the LED at whatever its current
|
||
|
|
state is, without producing a glitch. The default is off if this
|
||
|
|
property is not present.
|
||
|
|
|
||
|
|
Examples:
|
||
|
|
|
||
|
|
leds {
|
||
|
|
compatible = "gpio-leds";
|
||
|
|
hdd {
|
||
|
|
label = "IDE Activity";
|
||
|
|
gpios = <&mcu_pio 0 1>; /* Active low */
|
||
|
|
linux,default-trigger = "ide-disk";
|
||
|
|
};
|
||
|
|
|
||
|
|
fault {
|
||
|
|
gpios = <&mcu_pio 1 0>;
|
||
|
|
/* Keep LED on if BIOS detected hardware fault */
|
||
|
|
default-state = "keep";
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
run-control {
|
||
|
|
compatible = "gpio-leds";
|
||
|
|
red {
|
||
|
|
gpios = <&mpc8572 6 0>;
|
||
|
|
default-state = "off";
|
||
|
|
};
|
||
|
|
green {
|
||
|
|
gpios = <&mpc8572 7 0>;
|
||
|
|
default-state = "on";
|
||
|
|
};
|
||
|
|
};
|