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                 reset0: reset-controller@10 {
  30                         compatible = "lantiq,xrx200-reset";
  31                         reg = <0x10 4>, <0x14 4>;
  32
  33                         #reset-cells = <2>;
  34                 };
  35
  36                 reset1: reset-controller@48 {
  37                         compatible = "lantiq,xrx200-reset";
  38                         reg = <0x48 4>, <0x24 4>;
  39
  40                         #reset-cells = <2>;
  41                 };
  42
  43                 usb_phy0: usb2-phy@18 {
  44                         compatible = "lantiq,xrx200-usb2-phy";
  45                         reg = <0x18 4>, <0x38 4>;
  46
  47                         resets = <&reset1 4 4>, <&reset0 4 4>;
  48                         reset-names = "phy", "ctrl";
  49                         #phy-cells = <0>;
  50                 };
  51
  52                 usb_phy1: usb2-phy@34 {
  53                         compatible = "lantiq,xrx200-usb2-phy";
  54                         reg = <0x34 4>, <0x3C 4>;
  55
  56                         resets = <&reset1 5 4>, <&reset0 4 4>;
  57                         reset-names = "phy", "ctrl";
  58                         #phy-cells = <0>;
  59                 };
  60
  61                 reboot@10 {
  62                         compatible = "syscon-reboot";
  63                         reg = <0x10 4>;
  64
  65                         regmap = <&rcu0>;
  66                         offset = <0x10>;
  67                         mask = <0x40000000>;
  68                 };
  69         };