Documentation/devicetree/bindings/soc/rockchip/grf.txt

   1 * Rockchip General Register Files (GRF)
   2
   3 The general register file will be used to do static set by software, which
   4 is composed of many registers for system control.
   5
   6 From RK3368 SoCs, the GRF is divided into two sections,
   7 - GRF, used for general non-secure system,
   8 - SGRF, used for general secure system,
   9 - PMUGRF, used for always on system
  10
  11 On RK3328 SoCs, the GRF adds a section for USB2PHYGRF,
  12
  13 Required Properties:
  14
  15 - compatible: GRF should be one of the following:
  16    - "rockchip,rk3036-grf", "syscon": for rk3036
  17    - "rockchip,rk3066-grf", "syscon": for rk3066
  18    - "rockchip,rk3188-grf", "syscon": for rk3188
  19    - "rockchip,rk3228-grf", "syscon": for rk3228
  20    - "rockchip,rk3288-grf", "syscon": for rk3288
  21    - "rockchip,rk3328-grf", "syscon": for rk3328
  22    - "rockchip,rk3368-grf", "syscon": for rk3368
  23    - "rockchip,rk3399-grf", "syscon": for rk3399
  24    - "rockchip,rv1108-grf", "syscon": for rv1108
  25 - compatible: PMUGRF should be one of the following:
  26    - "rockchip,rk3368-pmugrf", "syscon": for rk3368
  27    - "rockchip,rk3399-pmugrf", "syscon": for rk3399
  28 - compatible: SGRF should be one of the following
  29    - "rockchip,rk3288-sgrf", "syscon": for rk3288
  30 - compatible: USB2PHYGRF should be one of the followings
  31    - "rockchip,rk3328-usb2phy-grf", "syscon": for rk3328
  32 - compatible: USBGRF should be one of the following
  33    - "rockchip,rv1108-usbgrf", "syscon": for rv1108
  34 - reg: physical base address of the controller and length of memory mapped
  35   region.
  36
  37 Example: GRF and PMUGRF of RK3399 SoCs
  38
  39         pmugrf: syscon@ff320000 {
  40                 compatible = "rockchip,rk3399-pmugrf", "syscon";
  41                 reg = <0x0 0xff320000 0x0 0x1000>;
  42         };
  43
  44         grf: syscon@ff770000 {
  45                 compatible = "rockchip,rk3399-grf", "syscon";
  46                 reg = <0x0 0xff770000 0x0 0x10000>;
  47         };