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                 - "allwinner,sun50i-h6-ccu"
  24                 - "allwinner,sun50i-h6-r-ccu"
  25                 - "allwinner,suniv-f1c100s-ccu"
  26                 - "nextthing,gr8-ccu"
  27
  28 - reg: Must contain the registers base address and length
  29 - clocks: phandle to the oscillators feeding the CCU. Two are needed:
  30   - "hosc": the high frequency oscillator (usually at 24MHz)
  31   - "losc": the low frequency oscillator (usually at 32kHz)
  32             On the A83T, this is the internal 16MHz oscillator divided by 512
  33 - clock-names: Must contain the clock names described just above
  34 - #clock-cells : must contain 1
  35 - #reset-cells : must contain 1
  36
  37 For the main CCU on H6, one more clock is needed:
  38 - "iosc": the SoC's internal frequency oscillator
  39
  40 For the PRCM CCUs on A83T/H3/A64/H6, two more clocks are needed:
  41 - "pll-periph": the SoC's peripheral PLL from the main CCU
  42 - "iosc": the SoC's internal frequency oscillator
  43
  44 Example for generic CCU:
  45 ccu: clock@1c20000 {
  46         compatible = "allwinner,sun8i-h3-ccu";
  47         reg = <0x01c20000 0x400>;
  48         clocks = <&osc24M>, <&osc32k>;
  49         clock-names = "hosc", "losc";
  50         #clock-cells = <1>;
  51         #reset-cells = <1>;
  52 };
  53
  54 Example for PRCM CCU:
  55 r_ccu: clock@1f01400 {
  56         compatible = "allwinner,sun50i-a64-r-ccu";
  57         reg = <0x01f01400 0x100>;
  58         clocks = <&osc24M>, <&osc32k>, <&iosc>, <&ccu CLK_PLL_PERIPH0>;
  59         clock-names = "hosc", "losc", "iosc", "pll-periph";
  60         #clock-cells = <1>;
  61         #reset-cells = <1>;
  62 };