diff options
author | Simon Glass <sjg@chromium.org> | 2015-06-23 15:38:45 -0600 |
---|---|---|
committer | Simon Glass <sjg@chromium.org> | 2015-07-21 17:39:24 -0600 |
commit | 5917112c9e9f7a60062c604b3224bd5713c41f46 (patch) | |
tree | 71c53336a056df66ac8ac1b1874f1c60f0d82a0a /doc/device-tree-bindings | |
parent | 5725128507eca41bb110d702858ca2c8d7dc4085 (diff) | |
download | u-boot-imx-5917112c9e9f7a60062c604b3224bd5713c41f46.zip u-boot-imx-5917112c9e9f7a60062c604b3224bd5713c41f46.tar.gz u-boot-imx-5917112c9e9f7a60062c604b3224bd5713c41f46.tar.bz2 |
dm: Add support for LEDs
Add a simple uclass for LEDs, so that these can be controlled by the device
tree and activated when needed. LEDs are referred to by their label.
This implementation requires a driver for each type of LED (e.g GPIO, I2C).
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'doc/device-tree-bindings')
-rw-r--r-- | doc/device-tree-bindings/leds/common.txt | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/leds/common.txt b/doc/device-tree-bindings/leds/common.txt new file mode 100644 index 0000000..2d88816 --- /dev/null +++ b/doc/device-tree-bindings/leds/common.txt @@ -0,0 +1,23 @@ +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"; + ... +}; |