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 ON RK3308 SoC, the GRF is divided into four sections:
  14 - GRF, used for general non-secure system,
  15 - SGRF, used for general secure system,
  16 - DETECTGRF, used for audio codec system,
  17 - COREGRF, used for pvtm,
  18
  19 Required Properties:
  20
  21 - compatible: GRF should be one of the following:
  22    - "rockchip,px30-grf", "syscon": for px30
  23    - "rockchip,rk3036-grf", "syscon": for rk3036
  24    - "rockchip,rk3066-grf", "syscon": for rk3066
  25    - "rockchip,rk3188-grf", "syscon": for rk3188
  26    - "rockchip,rk3228-grf", "syscon": for rk3228
  27    - "rockchip,rk3288-grf", "syscon": for rk3288
  28    - "rockchip,rk3308-grf", "syscon": for rk3308
  29    - "rockchip,rk3328-grf", "syscon": for rk3328
  30    - "rockchip,rk3368-grf", "syscon": for rk3368
  31    - "rockchip,rk3399-grf", "syscon": for rk3399
  32    - "rockchip,rv1108-grf", "syscon": for rv1108
  33 - compatible: DETECTGRF should be one of the following:
  34    - "rockchip,rk3308-detect-grf", "syscon": for rk3308
  35 - compatilbe: COREGRF should be one of the following:
  36    - "rockchip,rk3308-core-grf", "syscon": for rk3308
  37 - compatible: PMUGRF should be one of the following:
  38    - "rockchip,px30-pmugrf", "syscon": for px30
  39    - "rockchip,rk3368-pmugrf", "syscon": for rk3368
  40    - "rockchip,rk3399-pmugrf", "syscon": for rk3399
  41 - compatible: SGRF should be one of the following:
  42    - "rockchip,rk3288-sgrf", "syscon": for rk3288
  43 - compatible: USB2PHYGRF should be one of the following:
  44    - "rockchip,px30-usb2phy-grf", "syscon": for px30
  45    - "rockchip,rk3328-usb2phy-grf", "syscon": for rk3328
  46 - compatible: USBGRF should be one of the following:
  47    - "rockchip,rv1108-usbgrf", "syscon": for rv1108
  48 - reg: physical base address of the controller and length of memory mapped
  49   region.
  50
  51 Example: GRF and PMUGRF of RK3399 SoCs
  52
  53         pmugrf: syscon@ff320000 {
  54                 compatible = "rockchip,rk3399-pmugrf", "syscon";
  55                 reg = <0x0 0xff320000 0x0 0x1000>;
  56         };
  57
  58         grf: syscon@ff770000 {
  59                 compatible = "rockchip,rk3399-grf", "syscon";
  60                 reg = <0x0 0xff770000 0x0 0x10000>;
  61         };