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7bdea87a87
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: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Felipe Balbi <balbi@ti.com>
42 lines
1.4 KiB
Plaintext
42 lines
1.4 KiB
Plaintext
USB NOP PHY
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Required properties:
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- compatible: should be usb-nop-xceiv
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Optional properties:
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- clocks: phandle to the PHY clock. Use as per Documentation/devicetree
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/bindings/clock/clock-bindings.txt
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This property is required if clock-frequency is specified.
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- clock-names: Should be "main_clk"
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- clock-frequency: the clock frequency (in Hz) that the PHY clock must
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be configured to.
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- vcc-supply: phandle to the regulator that provides power to the PHY.
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- reset-gpios: Should specify the GPIO for reset.
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- vbus-detect-gpio: should specify the GPIO detecting a VBus insertion
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(see Documentation/devicetree/bindings/gpio/gpio.txt)
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- vbus-regulator : should specifiy the regulator supplying current drawn from
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the VBus line (see Documentation/devicetree/bindings/regulator/regulator.txt).
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Example:
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hsusb1_phy {
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compatible = "usb-nop-xceiv";
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clock-frequency = <19200000>;
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clocks = <&osc 0>;
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clock-names = "main_clk";
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vcc-supply = <&hsusb1_vcc_regulator>;
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reset-gpios = <&gpio1 7 GPIO_ACTIVE_LOW>;
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vbus-detect-gpio = <&gpio2 13 GPIO_ACTIVE_HIGH>;
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vbus-regulator = <&vbus_regulator>;
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};
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hsusb1_phy is a NOP USB PHY device that gets its clock from an oscillator
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and expects that clock to be configured to 19.2MHz by the NOP PHY driver.
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hsusb1_vcc_regulator provides power to the PHY and GPIO 7 controls RESET.
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GPIO 13 detects VBus insertion, and accordingly notifies the vbus-regulator.
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