From: "Ying-Chun Liu (PaulLiu)" <paul....@linaro.org>
Document the bindings for usb-nop-xceiv
Signed-off-by: Ying-Chun Liu (PaulLiu) <paul....@linaro.org>
---
.../phy/usb-nop-xceiv.txt | 43 +++++++++++++++++++
1 file changed, 43 insertions(+)
create mode 100644 doc/device-tree-bindings/phy/usb-nop-xceiv.txt
diff --git a/doc/device-tree-bindings/phy/usb-nop-xceiv.txt
b/doc/device-tree-bindings/phy/usb-nop-xceiv.txt
new file mode 100644
index 0000000000..4dc6a8ee30
--- /dev/null
+++ b/doc/device-tree-bindings/phy/usb-nop-xceiv.txt
@@ -0,0 +1,43 @@
+USB NOP PHY
+
+Required properties:
+- compatible: should be usb-nop-xceiv
+- #phy-cells: Must be 0
+
+Optional properties:
+- clocks: phandle to the PHY clock. Use as per Documentation/devicetree
+ /bindings/clock/clock-bindings.txt
+ This property is required if clock-frequency is specified.
+
+- clock-names: Should be "main_clk"
+
+- clock-frequency: the clock frequency (in Hz) that the PHY clock must
+ be configured to.
+
+- vcc-supply: phandle to the regulator that provides power to the PHY.
+
+- reset-gpios: Should specify the GPIO for reset.
+
+- vbus-detect-gpio: should specify the GPIO detecting a VBus insertion
+ (see Documentation/devicetree/bindings/gpio/gpio.txt)
+- vbus-regulator : should specifiy the regulator supplying current drawn from
+ the VBus line (see
Documentation/devicetree/bindings/regulator/regulator.txt).
+
+Example:
+
+ hsusb1_phy {
+ compatible = "usb-nop-xceiv";
+ clock-frequency = <19200000>;
+ clocks = <&osc 0>;
+ clock-names = "main_clk";
+ vcc-supply = <&hsusb1_vcc_regulator>;
+ reset-gpios = <&gpio1 7 GPIO_ACTIVE_LOW>;
+ vbus-detect-gpio = <&gpio2 13 GPIO_ACTIVE_HIGH>;
+ vbus-regulator = <&vbus_regulator>;
+ #phy-cells = <0>;
+ };
+
+hsusb1_phy is a NOP USB PHY device that gets its clock from an oscillator
+and expects that clock to be configured to 19.2MHz by the NOP PHY driver.
+hsusb1_vcc_regulator provides power to the PHY and GPIO 7 controls RESET.
+GPIO 13 detects VBus insertion, and accordingly notifies the vbus-regulator.
--
2.30.1
