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authorMarek Belisko <marek.belisko@open-nandra.com>2012-11-15 22:51:56 +0100
committerGrant Likely <grant.likely@secretlab.ca>2012-11-21 15:53:22 +0000
commit07c121149cb30405b37ceae3cd29e5b6b6e65cc0 (patch)
tree9728da534e5c4095cd59dff7306692b0d14d0b97 /Documentation/devicetree/bindings/leds
parentbe193249b4178158c0f697cb452b2bbf0cb16361 (diff)
downloadvexpress-lsk-07c121149cb30405b37ceae3cd29e5b6b6e65cc0.tar.gz
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: Marek Belisko <marek.belisko@open-nandra.com> Reviewed-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'Documentation/devicetree/bindings/leds')
-rw-r--r--Documentation/devicetree/bindings/leds/common.txt23
1 files changed, 23 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/leds/common.txt b/Documentation/devicetree/bindings/leds/common.txt
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+++ b/Documentation/devicetree/bindings/leds/common.txt
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+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";
+ ...
+};