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-rw-r--r--Documentation/devicetree/bindings/gpio/led.txt14
-rw-r--r--Documentation/devicetree/bindings/leds/common.txt23
-rw-r--r--Documentation/devicetree/usage-model.txt2
3 files changed, 28 insertions, 11 deletions
diff --git a/Documentation/devicetree/bindings/gpio/led.txt b/Documentation/devicetree/bindings/gpio/led.txt
index edc83c1c0d54..df1b3080f6b8 100644
--- a/Documentation/devicetree/bindings/gpio/led.txt
+++ b/Documentation/devicetree/bindings/gpio/led.txt
@@ -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
diff --git a/Documentation/devicetree/bindings/leds/common.txt b/Documentation/devicetree/bindings/leds/common.txt
new file mode 100644
index 000000000000..2d88816dd550
--- /dev/null
+++ b/Documentation/devicetree/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";
+ ...
+};
diff --git a/Documentation/devicetree/usage-model.txt b/Documentation/devicetree/usage-model.txt
index dca90fe22a90..ef9d06c9f8fd 100644
--- a/Documentation/devicetree/usage-model.txt
+++ b/Documentation/devicetree/usage-model.txt
@@ -347,7 +347,7 @@ later), which will happily live at the base of the Linux /sys/devices
tree. Therefore, if a DT node is at the root of the tree, then it
really probably is best registered as a platform_device.
-Linux board support code calls of_platform_populate(NULL, NULL, NULL)
+Linux board support code calls of_platform_populate(NULL, NULL, NULL, NULL)
to kick off discovery of devices at the root of the tree. The
parameters are all NULL because when starting from the root of the
tree, there is no need to provide a starting node (the first NULL), a