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linux-next/Documentation/devicetree/bindings/usb/usb-nop-xceiv.txt
Roger Quadros bd27fa44e1 usb: phy: generic: Don't use regulator framework for RESET line
Modelling the RESET line as a regulator supply wasn't a good idea
as it kind of abuses the regulator framework and also makes adaptation
code more complex.

Instead, manage the RESET gpio line directly in the driver. Update
the device tree binding information.

This also makes us easy to migrate to a dedicated GPIO RESET controller
whenever it becomes available.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-10-04 09:29:03 -05:00

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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 RESET to the PHY.
- reset-gpios: Should specify the GPIO for reset.
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>;
};
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.