Documentation/devicetree/bindings/arm/samsung/pmu.txt

   1 SAMSUNG Exynos SoC series PMU Registers
   2
   3 Properties:
   4  - compatible : should contain two values. First value must be one from following list:
   5                    - "samsung,exynos3250-pmu" - for Exynos3250 SoC,
   6                    - "samsung,exynos4210-pmu" - for Exynos4210 SoC,
   7                    - "samsung,exynos4212-pmu" - for Exynos4212 SoC,
   8                    - "samsung,exynos4412-pmu" - for Exynos4412 SoC,
   9                    - "samsung,exynos5250-pmu" - for Exynos5250 SoC,
  10                    - "samsung,exynos5260-pmu" - for Exynos5260 SoC.
  11                    - "samsung,exynos5410-pmu" - for Exynos5410 SoC,
  12                    - "samsung,exynos5420-pmu" - for Exynos5420 SoC.
  13                 second value must be always "syscon".
  14
  15  - reg : offset and length of the register set.
  16
  17  - #clock-cells : must be <1>, since PMU requires once cell as clock specifier.
  18                 The single specifier cell is used as index to list of clocks
  19                 provided by PMU, which is currently:
  20                         0 : SoC clock output (CLKOUT pin)
  21
  22  - clock-names : list of clock names for particular CLKOUT mux inputs in
  23                 following format:
  24                         "clkoutN", where N is a decimal number corresponding to
  25                         CLKOUT mux control bits value for given input, e.g.
  26                                 "clkout0", "clkout7", "clkout15".
  27
  28  - clocks : list of phandles and specifiers to all input clocks listed in
  29                 clock-names property.
  30
  31 Example :
  32 pmu_system_controller: system-controller@10040000 {
  33         compatible = "samsung,exynos5250-pmu", "syscon";
  34         reg = <0x10040000 0x5000>;
  35         #clock-cells = <1>;
  36         clock-names = "clkout0", "clkout1", "clkout2", "clkout3",
  37                         "clkout4", "clkout8", "clkout9";
  38         clocks = <&clock CLK_OUT_DMC>, <&clock CLK_OUT_TOP>,
  39                 <&clock CLK_OUT_LEFTBUS>, <&clock CLK_OUT_RIGHTBUS>,
  40                 <&clock CLK_OUT_CPU>, <&clock CLK_XXTI>,
  41                 <&clock CLK_XUSBXTI>;
  42 };
  43
  44 Example of clock consumer :
  45
  46 usb3503: usb3503@08 {
  47         /* ... */
  48         clock-names = "refclk";
  49         clocks = <&pmu_system_controller 0>;
  50         /* ... */
  51 };