From: Rafał Miłecki <rafal@xxxxxxxxxx>
Some LEDs can be related to particular USB ports (common case for home
routers). This property allows describing such a relation.
Signed-off-by: Rafał Miłecki <rafal@xxxxxxxxxx>
---
This patch is based on top of commit 52e847dc431 ("DT: leds: Improve examples
by adding some context") sitting in the linux-leds.git (for-4.11).
---
Documentation/devicetree/bindings/leds/common.txt | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/Documentation/devicetree/bindings/leds/common.txt b/Documentation/devicetree/bindings/leds/common.txt
index 24b6560..fcfe661 100644
--- a/Documentation/devicetree/bindings/leds/common.txt
+++ b/Documentation/devicetree/bindings/leds/common.txt
@@ -49,6 +49,14 @@ Optional properties for child nodes:
- panic-indicator : This property specifies that the LED should be used,
if at all possible, as a panic indicator.
+- usb-ports : List of USB ports related to this LED. Some devices have LEDs that
+ should be used to indicate USB device activity. This can be
+ described with this property.
+ There can be more than one LED like this, e.g. some vendors use
+ one controller per USB version. It's then common to use different
+ color LEDs depending on device USB standard (like USB 2.0 vs.
+ USB 3.0).
+
Required properties for flash LED child nodes:
- flash-max-microamp : Maximum flash LED supply current in microamperes.
- flash-max-timeout-us : Maximum timeout in microseconds after which the flash
@@ -69,6 +77,11 @@ gpio-leds {
linux,default-trigger = "heartbeat";
gpios = <&gpio0 0 GPIO_ACTIVE_HIGH>;
};
+
+ usb {
+ gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;
+ usb-ports = <&ohci_port1>, <&ehci_port1>;
+ };
};
max77693-led {
--
2.10.1
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