Documentation/devicetree/bindings/mips/lantiq/rcu.txt

   1 Lantiq XWAY SoC RCU binding
   2 ===========================
   3
   4 This binding describes the RCU (reset controller unit) multifunction device,
   5 where each sub-device has it's own set of registers.
   6
   7 The RCU register range is used for multiple purposes. Mostly one device
   8 uses one or multiple register exclusively, but for some registers some
   9 bits are for one driver and some other bits are for a different driver.
  10 With this patch all accesses to the RCU registers will go through
  11 syscon.
  12
  13
  14 -------------------------------------------------------------------------------
  15 Required properties:
  16 - compatible    : The first and second values must be:
  17                   "lantiq,xrx200-rcu", "simple-mfd", "syscon"
  18 - reg           : The address and length of the system control registers
  19
  20
  21 -------------------------------------------------------------------------------
  22 Example of the RCU bindings on a xRX200 SoC:
  23         rcu0: rcu@203000 {
  24                 compatible = "lantiq,xrx200-rcu", "simple-mfd", "syscon";
  25                 reg = <0x203000 0x100>;
  26                 ranges = <0x0 0x203000 0x100>;
  27                 big-endian;
  28
  29                 gphy0: gphy@20 {
  30                         compatible = "lantiq,xrx200a2x-gphy";
  31                         reg = <0x20 0x4>;
  32
  33                         resets = <&reset0 31 30>, <&reset1 7 7>;
  34                         reset-names = "gphy", "gphy2";
  35                         lantiq,gphy-mode = <GPHY_MODE_GE>;
  36                 };
  37
  38                 gphy1: gphy@68 {
  39                         compatible = "lantiq,xrx200a2x-gphy";
  40                         reg = <0x68 0x4>;
  41
  42                         resets = <&reset0 29 28>, <&reset1 6 6>;
  43                         reset-names = "gphy", "gphy2";
  44                         lantiq,gphy-mode = <GPHY_MODE_GE>;
  45                 };
  46
  47                 reset0: reset-controller@10 {
  48                         compatible = "lantiq,xrx200-reset";
  49                         reg = <0x10 4>, <0x14 4>;
  50
  51                         #reset-cells = <2>;
  52                 };
  53
  54                 reset1: reset-controller@48 {
  55                         compatible = "lantiq,xrx200-reset";
  56                         reg = <0x48 4>, <0x24 4>;
  57
  58                         #reset-cells = <2>;
  59                 };
  60
  61                 usb_phy0: usb2-phy@18 {
  62                         compatible = "lantiq,xrx200-usb2-phy";
  63                         reg = <0x18 4>, <0x38 4>;
  64                         status = "disabled";
  65
  66                         resets = <&reset1 4 4>, <&reset0 4 4>;
  67                         reset-names = "phy", "ctrl";
  68                         #phy-cells = <0>;
  69                 };
  70
  71                 usb_phy1: usb2-phy@34 {
  72                         compatible = "lantiq,xrx200-usb2-phy";
  73                         reg = <0x34 4>, <0x3C 4>;
  74                         status = "disabled";
  75
  76                         resets = <&reset1 5 4>, <&reset0 4 4>;
  77                         reset-names = "phy", "ctrl";
  78                         #phy-cells = <0>;
  79                 };
  80
  81                 reboot@10 {
  82                         compatible = "syscon-reboot";
  83                         reg = <0x10 4>;
  84
  85                         regmap = <&rcu0>;
  86                         offset = <0x10>;
  87                         mask = <0x40000000>;
  88                 };
  89         };