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61 lines
2.1 KiB
Plaintext
61 lines
2.1 KiB
Plaintext
Device Tree Clock bindings for arch-sunxi
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This binding uses the common clock binding[1].
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[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
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Required properties:
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- compatible : shall be one of the following:
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"allwinner,sun4i-osc-clk" - for a gatable oscillator
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"allwinner,sun4i-pll1-clk" - for the main PLL clock
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"allwinner,sun4i-cpu-clk" - for the CPU multiplexer clock
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"allwinner,sun4i-axi-clk" - for the AXI clock
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"allwinner,sun4i-axi-gates-clk" - for the AXI gates
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"allwinner,sun4i-ahb-clk" - for the AHB clock
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"allwinner,sun4i-ahb-gates-clk" - for the AHB gates on A10
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"allwinner,sun5i-a13-ahb-gates-clk" - for the AHB gates on A13
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"allwinner,sun4i-apb0-clk" - for the APB0 clock
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"allwinner,sun4i-apb0-gates-clk" - for the APB0 gates on A10
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"allwinner,sun5i-a13-apb0-gates-clk" - for the APB0 gates on A13
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"allwinner,sun4i-apb1-clk" - for the APB1 clock
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"allwinner,sun4i-apb1-mux-clk" - for the APB1 clock muxing
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"allwinner,sun4i-apb1-gates-clk" - for the APB1 gates on A10
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"allwinner,sun5i-a13-apb1-gates-clk" - for the APB1 gates on A13
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Required properties for all clocks:
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- reg : shall be the control register address for the clock.
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- clocks : shall be the input parent clock(s) phandle for the clock
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- #clock-cells : from common clock binding; shall be set to 0 except for
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"allwinner,*-gates-clk" where it shall be set to 1
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Additionally, "allwinner,*-gates-clk" clocks require:
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- clock-output-names : the corresponding gate names that the clock controls
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Clock consumers should specify the desired clocks they use with a
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"clocks" phandle cell. Consumers that are using a gated clock should
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provide an additional ID in their clock property. The values of this
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ID are documented in sunxi/<soc>-gates.txt.
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For example:
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osc24M: osc24M@01c20050 {
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#clock-cells = <0>;
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compatible = "allwinner,sun4i-osc-clk";
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reg = <0x01c20050 0x4>;
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clocks = <&osc24M_fixed>;
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};
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pll1: pll1@01c20000 {
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#clock-cells = <0>;
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compatible = "allwinner,sun4i-pll1-clk";
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reg = <0x01c20000 0x4>;
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clocks = <&osc24M>;
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};
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cpu: cpu@01c20054 {
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#clock-cells = <0>;
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compatible = "allwinner,sun4i-cpu-clk";
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reg = <0x01c20054 0x4>;
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clocks = <&osc32k>, <&osc24M>, <&pll1>;
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};
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