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-rw-r--r--Documentation/powerpc/dts-bindings/gpio/led.txt17
1 files changed, 16 insertions, 1 deletions
diff --git a/Documentation/powerpc/dts-bindings/gpio/led.txt b/Documentation/powerpc/dts-bindings/gpio/led.txt
index 4fe14deedc0a..064db928c3c1 100644
--- a/Documentation/powerpc/dts-bindings/gpio/led.txt
+++ b/Documentation/powerpc/dts-bindings/gpio/led.txt
@@ -16,10 +16,17 @@ LED sub-node properties:
16 string defining the trigger assigned to the LED. Current triggers are: 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 17 "backlight" - LED will act as a back-light, controlled by the framebuffer
18 system 18 system
19 "default-on" - LED will turn on 19 "default-on" - LED will turn on, but see "default-state" below
20 "heartbeat" - LED "double" flashes at a load average based rate 20 "heartbeat" - LED "double" flashes at a load average based rate
21 "ide-disk" - LED indicates disk activity 21 "ide-disk" - LED indicates disk activity
22 "timer" - LED flashes at a fixed, configurable rate 22 "timer" - LED flashes at a fixed, configurable rate
23- default-state: (optional) The initial state of the LED. Valid
24 values are "on", "off", and "keep". If the LED is already on or off
25 and the default-state property is set the to same value, then no
26 glitch should be produced where the LED momentarily turns off (or
27 on). The "keep" setting will keep the LED at whatever its current
28 state is, without producing a glitch. The default is off if this
29 property is not present.
23 30
24Examples: 31Examples:
25 32
@@ -30,14 +37,22 @@ leds {
30 gpios = <&mcu_pio 0 1>; /* Active low */ 37 gpios = <&mcu_pio 0 1>; /* Active low */
31 linux,default-trigger = "ide-disk"; 38 linux,default-trigger = "ide-disk";
32 }; 39 };
40
41 fault {
42 gpios = <&mcu_pio 1 0>;
43 /* Keep LED on if BIOS detected hardware fault */
44 default-state = "keep";
45 };
33}; 46};
34 47
35run-control { 48run-control {
36 compatible = "gpio-leds"; 49 compatible = "gpio-leds";
37 red { 50 red {
38 gpios = <&mpc8572 6 0>; 51 gpios = <&mpc8572 6 0>;
52 default-state = "off";
39 }; 53 };
40 green { 54 green {
41 gpios = <&mpc8572 7 0>; 55 gpios = <&mpc8572 7 0>;
56 default-state = "on";
42 }; 57 };
43} 58}