mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
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
|
|
|
|
Required properties:
|
|
- compatible: should be usb-nop-xceiv
|
|
|
|
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>;
|
|
};
|
|
|
|
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.
|