projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 0eba3879 RQ |
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 | ||
| 6b1b0fe0 | 16 | - vcc-supply: phandle to the regulator that provides power to the PHY. |
| 0eba3879 | 17 | |
| bd27fa44 | 18 | - reset-gpios: Should specify the GPIO for reset. |
| 0eba3879 | 19 | |
| 7bdea87a RJ |
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 | ||
| 0eba3879 RQ |
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>; | |
| bd27fa44 | 33 | reset-gpios = <&gpio1 7 GPIO_ACTIVE_LOW>; |
| 7bdea87a RJ |
34 | vbus-detect-gpio = <&gpio2 13 GPIO_ACTIVE_HIGH>; |
| 35 | vbus-regulator = <&vbus_regulator>; | |
| 0eba3879 RQ |
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. | |
| bd27fa44 | 40 | hsusb1_vcc_regulator provides power to the PHY and GPIO 7 controls RESET. |
| 7bdea87a | 41 | GPIO 13 detects VBus insertion, and accordingly notifies the vbus-regulator. |