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

   1 USB NOP PHY
   2
   3 Required properties:
   4 - compatible: should be usb-nop-xceiv
   5
   6 Optional properties:
   7 - clocks: phandle to the PHY clock. Use as per Documentation/devicetree
   8   /bindings/clock/clock-bindings.txt
   9   This property is required if clock-frequency is specified.
  10
  11 - clock-names: Should be "main_clk"
  12
  13 - clock-frequency: the clock frequency (in Hz) that the PHY clock must
  14   be configured to.
  15
  16 - vcc-supply: phandle to the regulator that provides power to the PHY.
  17
  18 - reset-gpios: Should specify the GPIO for reset.
  19
  20 - vbus-detect-gpio: should specify the GPIO detecting a VBus insertion
  21                     (see Documentation/devicetree/bindings/gpio/gpio.txt)
  22 - vbus-regulator : should specifiy the regulator supplying current drawn from
  23   the VBus line (see Documentation/devicetree/bindings/regulator/regulator.txt).
  24
  25 Example:
  26
  27         hsusb1_phy {
  28                 compatible = "usb-nop-xceiv";
  29                 clock-frequency = <19200000>;
  30                 clocks = <&osc 0>;
  31                 clock-names = "main_clk";
  32                 vcc-supply = <&hsusb1_vcc_regulator>;
  33                 reset-gpios = <&gpio1 7 GPIO_ACTIVE_LOW>;
  34                 vbus-detect-gpio = <&gpio2 13 GPIO_ACTIVE_HIGH>;
  35                 vbus-regulator = <&vbus_regulator>;
  36         };
  37
  38 hsusb1_phy is a NOP USB PHY device that gets its clock from an oscillator
  39 and expects that clock to be configured to 19.2MHz by the NOP PHY driver.
  40 hsusb1_vcc_regulator provides power to the PHY and GPIO 7 controls RESET.
  41 GPIO 13 detects VBus insertion, and accordingly notifies the vbus-regulator.