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1* Renesas R-Car generation 3 USB 3.0 PHY
2
3This file provides information on what the device node for the R-Car generation
43 and RZ/G2 USB 3.0 PHY contain.
5If you want to enable spread spectrum clock (ssc), you should use USB_EXTAL
6instead of USB3_CLK. However, if you don't want to these features, you don't
7need this driver.
8
9Required properties:
10- compatible: "renesas,r8a774a1-usb3-phy" if the device is a part of an R8A774A1
11 SoC.
12 "renesas,r8a774b1-usb3-phy" if the device is a part of an R8A774B1
13 SoC.
14 "renesas,r8a7795-usb3-phy" if the device is a part of an R8A7795
15 SoC.
16 "renesas,r8a7796-usb3-phy" if the device is a part of an R8A7796
17 SoC.
18 "renesas,r8a77965-usb3-phy" if the device is a part of an
19 R8A77965 SoC.
20 "renesas,rcar-gen3-usb3-phy" for a generic R-Car Gen3 or RZ/G2
21 compatible device.
22
23 When compatible with the generic version, nodes must list the
24 SoC-specific version corresponding to the platform first
25 followed by the generic version.
26
27- reg: offset and length of the USB 3.0 PHY register block.
28- clocks: A list of phandles and clock-specifier pairs.
29- clock-names: Name of the clocks.
30 - The funcional clock must be "usb3-if".
31 - The usb3's external clock must be "usb3s_clk".
32 - The usb2's external clock must be "usb_extal". If you want to use the ssc,
33 the clock-frequency must not be 0.
34- #phy-cells: see phy-bindings.txt in the same directory, must be <0>.
35
36Optional properties:
37- renesas,ssc-range: Enable/disable spread spectrum clock (ssc) by using
38 the following values as u32:
39 - 0 (or the property doesn't exist): disable the ssc
40 - 4980: enable the ssc as -4980 ppm
41 - 4492: enable the ssc as -4492 ppm
42 - 4003: enable the ssc as -4003 ppm
43
44Example (R-Car H3):
45
46 usb-phy@e65ee000 {
47 compatible = "renesas,r8a7795-usb3-phy",
48 "renesas,rcar-gen3-usb3-phy";
49 reg = <0 0xe65ee000 0 0x90>;
50 clocks = <&cpg CPG_MOD 328>, <&usb3s0_clk>, <&usb_extal>;
51 clock-names = "usb3-if", "usb3s_clk", "usb_extal";
52 };