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 - compatible: PMUGRF should be one of the following:
  25    - "rockchip,rk3368-pmugrf", "syscon": for rk3368
  26    - "rockchip,rk3399-pmugrf", "syscon": for rk3399
  27 - compatible: SGRF should be one of the following
  28    - "rockchip,rk3288-sgrf", "syscon": for rk3288
  29 - compatible: USB2PHYGRF should be one of the followings
  30    - "rockchip,rk3328-usb2phy-grf", "syscon": for rk3328
  31 - reg: physical base address of the controller and length of memory mapped
  32   region.
  33
  34 Example: GRF and PMUGRF of RK3399 SoCs
  35
  36         pmugrf: syscon@ff320000 {
  37                 compatible = "rockchip,rk3399-pmugrf", "syscon";
  38                 reg = <0x0 0xff320000 0x0 0x1000>;
  39         };
  40
  41         grf: syscon@ff770000 {
  42                 compatible = "rockchip,rk3399-grf", "syscon";
  43                 reg = <0x0 0xff770000 0x0 0x10000>;
  44         };