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-rw-r--r--Documentation/powerpc/dts-bindings/gpio/led.txt46
1 files changed, 37 insertions, 9 deletions
diff --git a/Documentation/powerpc/dts-bindings/gpio/led.txt b/Documentation/powerpc/dts-bindings/gpio/led.txt
index ff51f4c0fa9d..4fe14deedc0a 100644
--- a/Documentation/powerpc/dts-bindings/gpio/led.txt
+++ b/Documentation/powerpc/dts-bindings/gpio/led.txt
@@ -1,15 +1,43 @@
1LED connected to GPIO 1LEDs connected to GPIO lines
2 2
3Required properties: 3Required properties:
4- compatible : should be "gpio-led". 4- compatible : should be "gpio-leds".
5- label : (optional) the label for this LED. If omitted, the label is 5
6Each LED is represented as a sub-node of the gpio-leds device. Each
7node's name represents the name of the corresponding LED.
8
9LED sub-node properties:
10- gpios : Should specify the LED's GPIO, see "Specifying GPIO information
11 for devices" in Documentation/powerpc/booting-without-of.txt. Active
12 low LEDs should be indicated using flags in the GPIO specifier.
13- label : (optional) The label for this LED. If omitted, the label is
6 taken from the node name (excluding the unit address). 14 taken from the node name (excluding the unit address).
7- gpios : should specify LED GPIO. 15- linux,default-trigger : (optional) This parameter, if present, is a
16 string defining the trigger assigned to the LED. Current triggers are:
17 "backlight" - LED will act as a back-light, controlled by the framebuffer
18 system
19 "default-on" - LED will turn on
20 "heartbeat" - LED "double" flashes at a load average based rate
21 "ide-disk" - LED indicates disk activity
22 "timer" - LED flashes at a fixed, configurable rate
8 23
9Example: 24Examples:
10 25
11led@0 { 26leds {
12 compatible = "gpio-led"; 27 compatible = "gpio-leds";
13 label = "hdd"; 28 hdd {
14 gpios = <&mcu_pio 0 1>; 29 label = "IDE Activity";
30 gpios = <&mcu_pio 0 1>; /* Active low */
31 linux,default-trigger = "ide-disk";
32 };
15}; 33};
34
35run-control {
36 compatible = "gpio-leds";
37 red {
38 gpios = <&mpc8572 6 0>;
39 };
40 green {
41 gpios = <&mpc8572 7 0>;
42 };
43}