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Diffstat (limited to 'Documentation/devicetree/bindings/clock/sunxi-ccu.txt')
-rw-r--r-- | Documentation/devicetree/bindings/clock/sunxi-ccu.txt | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/clock/sunxi-ccu.txt b/Documentation/devicetree/bindings/clock/sunxi-ccu.txt new file mode 100644 index 000000000000..df9fad58facd --- /dev/null +++ b/Documentation/devicetree/bindings/clock/sunxi-ccu.txt @@ -0,0 +1,50 @@ +Allwinner Clock Control Unit Binding +------------------------------------ + +Required properties : +- compatible: must contain one of the following compatibles: + - "allwinner,sun6i-a31-ccu" + - "allwinner,sun8i-a23-ccu" + - "allwinner,sun8i-a33-ccu" + - "allwinner,sun8i-a83t-ccu" + - "allwinner,sun8i-a83t-r-ccu" + - "allwinner,sun8i-h3-ccu" + - "allwinner,sun8i-h3-r-ccu" + - "allwinner,sun8i-v3s-ccu" + - "allwinner,sun9i-a80-ccu" + - "allwinner,sun50i-a64-ccu" + - "allwinner,sun50i-a64-r-ccu" + - "allwinner,sun50i-h5-ccu" + +- reg: Must contain the registers base address and length +- clocks: phandle to the oscillators feeding the CCU. Two are needed: + - "hosc": the high frequency oscillator (usually at 24MHz) + - "losc": the low frequency oscillator (usually at 32kHz) + On the A83T, this is the internal 16MHz oscillator divided by 512 +- clock-names: Must contain the clock names described just above +- #clock-cells : must contain 1 +- #reset-cells : must contain 1 + +For the PRCM CCUs on A83T/H3/A64, two more clocks are needed: +- "pll-periph": the SoC's peripheral PLL from the main CCU +- "iosc": the SoC's internal frequency oscillator + +Example for generic CCU: +ccu: clock@01c20000 { + compatible = "allwinner,sun8i-h3-ccu"; + reg = <0x01c20000 0x400>; + clocks = <&osc24M>, <&osc32k>; + clock-names = "hosc", "losc"; + #clock-cells = <1>; + #reset-cells = <1>; +}; + +Example for PRCM CCU: +r_ccu: clock@01f01400 { + compatible = "allwinner,sun50i-a64-r-ccu"; + reg = <0x01f01400 0x100>; + clocks = <&osc24M>, <&osc32k>, <&iosc>, <&ccu CLK_PLL_PERIPH0>; + clock-names = "hosc", "losc", "iosc", "pll-periph"; + #clock-cells = <1>; + #reset-cells = <1>; +}; |