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-a83t-ccu"
  10                 - "allwinner,sun8i-a83t-r-ccu"
  11                 - "allwinner,sun8i-h3-ccu"
  12                 - "allwinner,sun8i-h3-r-ccu"
  13                 - "allwinner,sun8i-v3s-ccu"
  14                 - "allwinner,sun9i-a80-ccu"
  15                 - "allwinner,sun50i-a64-ccu"
  16                 - "allwinner,sun50i-a64-r-ccu"
  17                 - "allwinner,sun50i-h5-ccu"
  18
  19 - reg: Must contain the registers base address and length
  20 - clocks: phandle to the oscillators feeding the CCU. Two are needed:
  21   - "hosc": the high frequency oscillator (usually at 24MHz)
  22   - "losc": the low frequency oscillator (usually at 32kHz)
  23             On the A83T, this is the internal 16MHz oscillator divided by 512
  24 - clock-names: Must contain the clock names described just above
  25 - #clock-cells : must contain 1
  26 - #reset-cells : must contain 1
  27
  28 For the PRCM CCUs on A83T/H3/A64, two more clocks are needed:
  29 - "pll-periph": the SoC's peripheral PLL from the main CCU
  30 - "iosc": the SoC's internal frequency oscillator
  31
  32 Example for generic CCU:
  33 ccu: clock@01c20000 {
  34         compatible = "allwinner,sun8i-h3-ccu";
  35         reg = <0x01c20000 0x400>;
  36         clocks = <&osc24M>, <&osc32k>;
  37         clock-names = "hosc", "losc";
  38         #clock-cells = <1>;
  39         #reset-cells = <1>;
  40 };
  41
  42 Example for PRCM CCU:
  43 r_ccu: clock@01f01400 {
  44         compatible = "allwinner,sun50i-a64-r-ccu";
  45         reg = <0x01f01400 0x100>;
  46         clocks = <&osc24M>, <&osc32k>, <&iosc>, <&ccu CLK_PLL_PERIPH0>;
  47         clock-names = "hosc", "losc", "iosc", "pll-periph";
  48         #clock-cells = <1>;
  49         #reset-cells = <1>;
  50 };