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Commit 7bdea87a authored by Robert Jarzmik's avatar Robert Jarzmik Committed by Felipe Balbi
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usb: phy: nop: device tree documentation for vbus 



Enhance the phy documentation by adding 2 new optional bindings :
 - the vbus gpio, which detects usb insertion
 - the vbus regulator, which provides current drawn from the usb cable

Signed-off-by: default avatarRobert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent e9f2cefb

Documentation/devicetree/bindings/usb/usb-nop-xceiv.txt

+8 −0
Original line number Diff line number Diff line
@@ -17,6 +17,11 @@ Optional properties: 


- 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 {
@@ -26,8 +31,11 @@ Example: 
		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>;

	};



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.