Documentation/devicetree/bindings/clock/sunxi-ccu.txt

   1 Allwinner Clock Control Unit Binding
   2 ------------------------------------
   3
   4 Required properties :
   5 - compatible: must contain one of the following compatibles:
   6                 - "allwinner,sun6i-a31-ccu"
   7                 - "allwinner,sun8i-a23-ccu"
   8                 - "allwinner,sun8i-a33-ccu"
   9                 - "allwinner,sun8i-h3-ccu"
  10                 - "allwinner,sun8i-h3-r-ccu"
  11                 - "allwinner,sun8i-v3s-ccu"
  12                 - "allwinner,sun9i-a80-ccu"
  13                 - "allwinner,sun50i-a64-ccu"
  14                 - "allwinner,sun50i-a64-r-ccu"
  15                 - "allwinner,sun50i-h5-ccu"
  16
  17 - reg: Must contain the registers base address and length
  18 - clocks: phandle to the oscillators feeding the CCU. Two are needed:
  19   - "hosc": the high frequency oscillator (usually at 24MHz)
  20   - "losc": the low frequency oscillator (usually at 32kHz)
  21 - clock-names: Must contain the clock names described just above
  22 - #clock-cells : must contain 1
  23 - #reset-cells : must contain 1
  24
  25 For the PRCM CCUs on H3/A64, two more clocks are needed:
  26 - "pll-periph": the SoC's peripheral PLL from the main CCU
  27 - "iosc": the SoC's internal frequency oscillator
  28
  29 Example for generic CCU:
  30 ccu: clock@01c20000 {
  31         compatible = "allwinner,sun8i-h3-ccu";
  32         reg = <0x01c20000 0x400>;
  33         clocks = <&osc24M>, <&osc32k>;
  34         clock-names = "hosc", "losc";
  35         #clock-cells = <1>;
  36         #reset-cells = <1>;
  37 };
  38
  39 Example for PRCM CCU:
  40 r_ccu: clock@01f01400 {
  41         compatible = "allwinner,sun50i-a64-r-ccu";
  42         reg = <0x01f01400 0x100>;
  43         clocks = <&osc24M>, <&osc32k>, <&iosc>, <&ccu CLK_PLL_PERIPH0>;
  44         clock-names = "hosc", "losc", "iosc", "pll-periph";
  45         #clock-cells = <1>;
  46         #reset-cells = <1>;
  47 };