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,sun4i-a10-ccu"
   7                 - "allwinner,sun5i-a10s-ccu"
   8                 - "allwinner,sun5i-a13-ccu"
   9                 - "allwinner,sun6i-a31-ccu"
  10                 - "allwinner,sun7i-a20-ccu"
  11                 - "allwinner,sun8i-a23-ccu"
  12                 - "allwinner,sun8i-a33-ccu"
  13                 - "allwinner,sun8i-a83t-ccu"
  14                 - "allwinner,sun8i-a83t-r-ccu"
  15                 - "allwinner,sun8i-h3-ccu"
  16                 - "allwinner,sun8i-h3-r-ccu"
  17 +               - "allwinner,sun8i-r40-ccu"
  18                 - "allwinner,sun8i-v3s-ccu"
  19                 - "allwinner,sun9i-a80-ccu"
  20                 - "allwinner,sun50i-a64-ccu"
  21                 - "allwinner,sun50i-a64-r-ccu"
  22                 - "allwinner,sun50i-h5-ccu"
  23                 - "nextthing,gr8-ccu"
  24
  25 - reg: Must contain the registers base address and length
  26 - clocks: phandle to the oscillators feeding the CCU. Two are needed:
  27   - "hosc": the high frequency oscillator (usually at 24MHz)
  28   - "losc": the low frequency oscillator (usually at 32kHz)
  29             On the A83T, this is the internal 16MHz oscillator divided by 512
  30 - clock-names: Must contain the clock names described just above
  31 - #clock-cells : must contain 1
  32 - #reset-cells : must contain 1
  33
  34 For the PRCM CCUs on A83T/H3/A64, two more clocks are needed:
  35 - "pll-periph": the SoC's peripheral PLL from the main CCU
  36 - "iosc": the SoC's internal frequency oscillator
  37
  38 Example for generic CCU:
  39 ccu: clock@1c20000 {
  40         compatible = "allwinner,sun8i-h3-ccu";
  41         reg = <0x01c20000 0x400>;
  42         clocks = <&osc24M>, <&osc32k>;
  43         clock-names = "hosc", "losc";
  44         #clock-cells = <1>;
  45         #reset-cells = <1>;
  46 };
  47
  48 Example for PRCM CCU:
  49 r_ccu: clock@1f01400 {
  50         compatible = "allwinner,sun50i-a64-r-ccu";
  51         reg = <0x01f01400 0x100>;
  52         clocks = <&osc24M>, <&osc32k>, <&iosc>, <&ccu CLK_PLL_PERIPH0>;
  53         clock-names = "hosc", "losc", "iosc", "pll-periph";
  54         #clock-cells = <1>;
  55         #reset-cells = <1>;
  56 };