Documentation/devicetree/bindings/phy/rcar-gen2-phy.txt

   1 * Renesas R-Car generation 2 USB PHY
   2
   3 This file provides information on what the device node for the R-Car generation
   4 2 USB PHY contains.
   5
   6 Required properties:
   7 - compatible: "renesas,usb-phy-r8a7742" if the device is a part of R8A7742 SoC.
   8               "renesas,usb-phy-r8a7743" if the device is a part of R8A7743 SoC.
   9               "renesas,usb-phy-r8a7744" if the device is a part of R8A7744 SoC.
  10               "renesas,usb-phy-r8a7745" if the device is a part of R8A7745 SoC.
  11               "renesas,usb-phy-r8a77470" if the device is a part of R8A77470 SoC.
  12               "renesas,usb-phy-r8a7790" if the device is a part of R8A7790 SoC.
  13               "renesas,usb-phy-r8a7791" if the device is a part of R8A7791 SoC.
  14               "renesas,usb-phy-r8a7794" if the device is a part of R8A7794 SoC.
  15               "renesas,rcar-gen2-usb-phy" for a generic R-Car Gen2 or
  16                                           RZ/G1 compatible device.
  17
  18               When compatible with the generic version, nodes must list the
  19               SoC-specific version corresponding to the platform first
  20               followed by the generic version.
  21
  22 - reg: offset and length of the register block.
  23 - #address-cells: number of address cells for the USB channel subnodes, must
  24                   be <1>.
  25 - #size-cells: number of size cells for the USB channel subnodes, must be <0>.
  26 - clocks: clock phandle and specifier pair.
  27 - clock-names: string, clock input name, must be "usbhs".
  28
  29 The USB PHY device tree node should have the subnodes corresponding to the USB
  30 channels. These subnodes must contain the following properties:
  31 - reg: the USB controller selector; see the table below for the values.
  32 - #phy-cells: see phy-bindings.txt in the same directory, must be <1>.
  33
  34 The phandle's argument in the PHY specifier is the USB controller selector for
  35 the USB channel other than r8a77470 SoC; see the selector meanings below:
  36
  37 +-----------+---------------+---------------+
  38 |\ Selector |               |               |
  39 + --------- +       0       |       1       |
  40 | Channel  \|               |               |
  41 +-----------+---------------+---------------+
  42 | 0         | PCI EHCI/OHCI | HS-USB        |
  43 | 2         | PCI EHCI/OHCI | xHCI          |
  44 +-----------+---------------+---------------+
  45
  46 For r8a77470 SoC;see the selector meaning below:
  47
  48 +-----------+---------------+---------------+
  49 |\ Selector |               |               |
  50 + --------- +       0       |       1       |
  51 | Channel  \|               |               |
  52 +-----------+---------------+---------------+
  53 | 0         | EHCI/OHCI     | HS-USB        |
  54 +-----------+---------------+---------------+
  55
  56 Example (Lager board):
  57
  58         usb-phy@e6590100 {
  59                 compatible = "renesas,usb-phy-r8a7790", "renesas,rcar-gen2-usb-phy";
  60                 reg = <0 0xe6590100 0 0x100>;
  61                 #address-cells = <1>;
  62                 #size-cells = <0>;
  63                 clocks = <&cpg CPG_MOD 704>;
  64                 clock-names = "usbhs";
  65                 power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
  66                 resets = <&cpg 704>;
  67
  68                 usb0: usb-channel@0 {
  69                         reg = <0>;
  70                         #phy-cells = <1>;
  71                 };
  72                 usb2: usb-channel@2 {
  73                         reg = <2>;
  74                         #phy-cells = <1>;
  75                 };
  76         };
  77
  78 Example (iWave RZ/G1C sbc):
  79
  80         usbphy0: usb-phy0@e6590100 {
  81                 compatible = "renesas,usb-phy-r8a77470",
  82                              "renesas,rcar-gen2-usb-phy";
  83                 reg = <0 0xe6590100 0 0x100>;
  84                 #address-cells = <1>;
  85                 #size-cells = <0>;
  86                 clocks = <&cpg CPG_MOD 704>;
  87                 clock-names = "usbhs";
  88                 power-domains = <&sysc R8A77470_PD_ALWAYS_ON>;
  89                 resets = <&cpg 704>;
  90
  91                 usb0: usb-channel@0 {
  92                         reg = <0>;
  93                         #phy-cells = <1>;
  94                 };
  95         };
  96
  97         usbphy1: usb-phy@e6598100 {
  98                 compatible = "renesas,usb-phy-r8a77470",
  99                              "renesas,rcar-gen2-usb-phy";
 100                 reg = <0 0xe6598100 0 0x100>;
 101                 #address-cells = <1>;
 102                 #size-cells = <0>;
 103                 clocks = <&cpg CPG_MOD 706>;
 104                 clock-names = "usbhs";
 105                 power-domains = <&sysc R8A77470_PD_ALWAYS_ON>;
 106                 resets = <&cpg 706>;
 107
 108                 usb1: usb-channel@0 {
 109                         reg = <0>;
 110                         #phy-cells = <1>;
 111                 };
 112         };