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Subject[PATCH 2/2] dt-bindings: leds: document new "power-supply" property
Most of the LEDs are powered by a voltage/current regulator. describing in
the device-tree makes it possible for the LED core to enable/disable it
when needed.

Signed-off-by: Jean-Jacques Hiblot <>
Documentation/devicetree/bindings/leds/common.txt | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/leds/common.txt b/Documentation/devicetree/bindings/leds/common.txt
index 70876ac11367..e093a2b7eb90 100644
--- a/Documentation/devicetree/bindings/leds/common.txt
+++ b/Documentation/devicetree/bindings/leds/common.txt
@@ -61,6 +61,11 @@ Optional properties for child nodes:
- panic-indicator : This property specifies that the LED should be used,
if at all possible, as a panic indicator.

+- power-supply : A voltage/current regulator used to to power the LED. When a
+ LED is turned off, the LED core disable its regulator. The
+ same regulator can power many LED (or other) devices. It is
+ turned off only when all of its users disabled it.
- trigger-sources : List of devices which should be used as a source triggering
this LED activity. Some LEDs can be related to a specific
device and should somehow indicate its state. E.g. USB 2.0
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