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Commit 07c12114 authored by Marek Belisko's avatar Marek Belisko Committed by Grant Likely
Browse files

Documentation: Move common leds properties description to separate file. 



There are several drivers that use LEDs and depend on exactly the same
device tree binding. However, the binding documentation has simply been
cut-and-paste into each of the binding documents. Rather than continue
to duplicate it, this patch adds a common led binding document that all
can reference.

Signed-off-by: default avatarMarek Belisko <marek.belisko@open-nandra.com>
Reviewed-by: default avatarStephen Warren <swarren@nvidia.com>
Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
parent be193249

Documentation/devicetree/bindings/gpio/led.txt

+4 −10
Original line number Diff line number Diff line
@@ -10,16 +10,10 @@ 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) The label for this LED.  If omitted, the label is

  taken from the node name (excluding the unit address).

- linux,default-trigger :  (optional) This parameter, if present, is a

  string defining the trigger assigned to the LED.  Current triggers are:

    "backlight" - LED will act as a back-light, controlled by the framebuffer

		  system

    "default-on" - LED will turn on, but see "default-state" below

    "heartbeat" - LED "double" flashes at a load average based rate

    "ide-disk" - LED indicates disk activity

    "timer" - LED flashes at a fixed, configurable rate

- 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

Documentation/devicetree/bindings/leds/common.txt

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Original line number Diff line number Diff line 
Common leds properties.



Optional properties for child nodes:

- label : The label for this LED.  If omitted, the label is

  taken from the node name (excluding the unit address).



- linux,default-trigger :  This parameter, if present, is a

    string defining the trigger assigned to the LED.  Current triggers are:

     "backlight" - LED will act as a back-light, controlled by the framebuffer

		   system

     "default-on" - LED will turn on (but for leds-gpio see "default-state"

		    property in Documentation/devicetree/bindings/gpio/led.txt)

     "heartbeat" - LED "double" flashes at a load average based rate

     "ide-disk" - LED indicates disk activity

     "timer" - LED flashes at a fixed, configurable rate



Examples:



system-status {

	label = "Status";

	linux,default-trigger = "heartbeat";

	...

};