71 lines
2.4 KiB
Plaintext
71 lines
2.4 KiB
Plaintext
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SAMSUNG Exynos SoC series PMU Registers
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Properties:
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- compatible : should contain two values. First value must be one from following list:
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- "samsung,exynos3250-pmu" - for Exynos3250 SoC,
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- "samsung,exynos4210-pmu" - for Exynos4210 SoC,
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- "samsung,exynos4212-pmu" - for Exynos4212 SoC,
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- "samsung,exynos4412-pmu" - for Exynos4412 SoC,
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- "samsung,exynos5250-pmu" - for Exynos5250 SoC,
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- "samsung,exynos5260-pmu" - for Exynos5260 SoC.
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- "samsung,exynos5410-pmu" - for Exynos5410 SoC,
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- "samsung,exynos5420-pmu" - for Exynos5420 SoC.
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- "samsung,exynos5433-pmu" - for Exynos5433 SoC.
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- "samsung,exynos7-pmu" - for Exynos7 SoC.
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second value must be always "syscon".
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- reg : offset and length of the register set.
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- #clock-cells : must be <1>, since PMU requires once cell as clock specifier.
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The single specifier cell is used as index to list of clocks
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provided by PMU, which is currently:
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0 : SoC clock output (CLKOUT pin)
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- clock-names : list of clock names for particular CLKOUT mux inputs in
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following format:
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"clkoutN", where N is a decimal number corresponding to
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CLKOUT mux control bits value for given input, e.g.
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"clkout0", "clkout7", "clkout15".
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- clocks : list of phandles and specifiers to all input clocks listed in
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clock-names property.
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Optional properties:
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Some PMUs are capable of behaving as an interrupt controller (mostly
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to wake up a suspended PMU). In which case, they can have the
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following properties:
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- interrupt-controller: indicate that said PMU is an interrupt controller
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- #interrupt-cells: must be identical to the that of the parent interrupt
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controller.
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- interrupt-parent: a phandle indicating which interrupt controller
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this PMU signals interrupts to.
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Example :
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pmu_system_controller: system-controller@10040000 {
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compatible = "samsung,exynos5250-pmu", "syscon";
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reg = <0x10040000 0x5000>;
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interrupt-controller;
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#interrupt-cells = <3>;
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interrupt-parent = <&gic>;
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#clock-cells = <1>;
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clock-names = "clkout0", "clkout1", "clkout2", "clkout3",
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"clkout4", "clkout8", "clkout9";
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clocks = <&clock CLK_OUT_DMC>, <&clock CLK_OUT_TOP>,
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<&clock CLK_OUT_LEFTBUS>, <&clock CLK_OUT_RIGHTBUS>,
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<&clock CLK_OUT_CPU>, <&clock CLK_XXTI>,
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<&clock CLK_XUSBXTI>;
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};
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Example of clock consumer :
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usb3503: usb3503@08 {
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/* ... */
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clock-names = "refclk";
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clocks = <&pmu_system_controller 0>;
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/* ... */
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};
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