Add dt-binding documentation for generic onboard USB HUB.
Signed-off-by: Peter Chen <peter.chen@xxxxxxxxxxxxx>
---
.../bindings/usb/generic-onboard-hub.txt | 28 ++++++++++++++++++++++
1 file changed, 28 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/generic-onboard-hub.txt
diff --git a/Documentation/devicetree/bindings/usb/generic-onboard-hub.txt b/Documentation/devicetree/bindings/usb/generic-onboard-hub.txt
new file mode 100644
index 0000000..ea92205
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/generic-onboard-hub.txt
@@ -0,0 +1,28 @@
+Generic Onboard USB HUB
+
+Required properties:
+- compatible: should be "generic-onboard-hub"
+
+Optional properties:
+- clocks: the input clock for HUB.
+
+- clock-names: Should be "external_clk"
+
+- hub-reset-gpios: Should specify the GPIO for reset.
+
+- hub-reset-active-high: the active reset signal is high, if this property is
+ not set, the active reset signal is low.
+
+- hub-reset-duration-us: the duration for assert reset signal, the time unit
+ is microsecond.
+
+Example:
+
+ usb_hub1 {
+ compatible = "generic-onboard-hub";
+ clocks = <&clks IMX6QDL_CLK_CKO>;
+ clock-names = "external_clk";
+ hub-reset-gpios = <&gpio7 12 0>;
+ hub-reset-active-high;
+ hub-reset-duration-us = <2>;
+ };
--
1.9.1
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