e3276998da
During the introduction of the Allwinner SoC platforms, sunxi was initially meant as a generic name for all the variants of the Allwinner SoC. It was ok at the time of the support of only the A10 and A13 that look pretty much the same; but it's beginning to be troublesome with the future addition of the Allwinner A31 (sun6i) that is quite different, and would introduce some weird logic, where sunxi would actually mean in some case sun4i and sun5i but without sun6i... Moreover, it makes the compatible strings naming scheme not consistent with other architectures, where usually for this kind of compability, we just use the oldest SoC name that has this IP, so let's do just this. Signed-off-by: Emilio López <emilio@elopez.com.ar> Signed-off-by: Mike Turquette <mturquette@linaro.org>
44 lines
1.3 KiB
Text
44 lines
1.3 KiB
Text
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-ahb-clk" - for the AHB clock
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"allwinner,sun4i-apb0-clk" - for the APB0 clock
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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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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.
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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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