Documentation/devicetree/bindings/phy/samsung-phy.txt

Samsung S5P/EXYNOS SoC series MIPI CSIS/DSIM DPHY
-------------------------------------------------

Required properties:
- compatible : should be "samsung,s5pv210-mipi-video-phy";
- reg : offset and length of the MIPI DPHY register set;
- #phy-cells : from the generic phy bindings, must be 1;

For "samsung,s5pv210-mipi-video-phy" compatible PHYs the second cell in
the PHY specifier identifies the PHY and its meaning is as follows:
  0 - MIPI CSIS 0,
  1 - MIPI DSIM 0,
  2 - MIPI CSIS 1,
  3 - MIPI DSIM 1.

Samsung EXYNOS SoC series Display Port PHY
-------------------------------------------------

Required properties:
- compatible : should be "samsung,exynos5250-dp-video-phy";
- reg : offset and length of the Display Port PHY register set;
- #phy-cells : from the generic PHY bindings, must be 0;

Samsung S5P/EXYNOS SoC series USB PHY
-------------------------------------------------

Required properties:
- compatible : should be one of the listed compatibles:
	- "samsung,exynos4210-usb2-phy"
	- "samsung,exynos4x12-usb2-phy"
	- "samsung,exynos5250-usb2-phy"
- reg : a list of registers used by phy driver
	- first and obligatory is the location of phy modules registers
- samsung,sysreg-phandle - handle to syscon used to control the system registers
- samsung,pmureg-phandle - handle to syscon used to control PMU registers
- #phy-cells : from the generic phy bindings, must be 1;
- clocks and clock-names:
	- the "phy" clock is required by the phy module, used as a gate
	- the "ref" clock is used to get the rate of the clock provided to the
	  PHY module

The first phandle argument in the PHY specifier identifies the PHY, its
meaning is compatible dependent. For the currently supported SoCs (Exynos 4210
and Exynos 4212) it is as follows:
  0 - USB device ("device"),
  1 - USB host ("host"),
  2 - HSIC0 ("hsic0"),
  3 - HSIC1 ("hsic1"),

Exynos 4210 and Exynos 4212 use mode switching and require that mode switch
register is supplied.

Example:

For Exynos 4412 (compatible with Exynos 4212):

usbphy: phy@125b0000 {
	compatible = "samsung,exynos4x12-usb2-phy";
	reg = <0x125b0000 0x100>;
	clocks = <&clock 305>, <&clock 2>;
	clock-names = "phy", "ref";
	status = "okay";
	#phy-cells = <1>;
	samsung,sysreg-phandle = <&sys_reg>;
	samsung,pmureg-phandle = <&pmu_reg>;
};

Then the PHY can be used in other nodes such as:

phy-consumer@12340000 {
	phys = <&usbphy 2>;
	phy-names = "phy";
};

Refer to DT bindings documentation of particular PHY consumer devices for more
information about required PHYs and the way of specification.