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Documentation / devicetree / bindings / arm / samsung / pmu.txt


Based on kernel version 4.16.1. Page generated on 2018-04-09 11:52 EST.

1	SAMSUNG Exynos SoC series PMU Registers
2	
3	Properties:
4	 - compatible : should contain two values. First value must be one from following list:
5			   - "samsung,exynos3250-pmu" - for Exynos3250 SoC,
6			   - "samsung,exynos4210-pmu" - for Exynos4210 SoC,
7			   - "samsung,exynos4412-pmu" - for Exynos4412 SoC,
8			   - "samsung,exynos5250-pmu" - for Exynos5250 SoC,
9			   - "samsung,exynos5260-pmu" - for Exynos5260 SoC.
10			   - "samsung,exynos5410-pmu" - for Exynos5410 SoC,
11			   - "samsung,exynos5420-pmu" - for Exynos5420 SoC.
12			   - "samsung,exynos5433-pmu" - for Exynos5433 SoC.
13			   - "samsung,exynos7-pmu" - for Exynos7 SoC.
14			second value must be always "syscon".
15	
16	 - reg : offset and length of the register set.
17	
18	 - #clock-cells : must be <1>, since PMU requires once cell as clock specifier.
19			The single specifier cell is used as index to list of clocks
20			provided by PMU, which is currently:
21				0 : SoC clock output (CLKOUT pin)
22	
23	 - clock-names : list of clock names for particular CLKOUT mux inputs in
24			following format:
25				"clkoutN", where N is a decimal number corresponding to
26				CLKOUT mux control bits value for given input, e.g.
27					"clkout0", "clkout7", "clkout15".
28	
29	 - clocks : list of phandles and specifiers to all input clocks listed in
30			clock-names property.
31	
32	Optional properties:
33	
34	Some PMUs are capable of behaving as an interrupt controller (mostly
35	to wake up a suspended PMU). In which case, they can have the
36	following properties:
37	
38	- interrupt-controller: indicate that said PMU is an interrupt controller
39	
40	- #interrupt-cells: must be identical to the that of the parent interrupt
41	  controller.
42	
43	- interrupt-parent: a phandle indicating which interrupt controller
44	  this PMU signals interrupts to.
45	
46	Example :
47	pmu_system_controller: system-controller@10040000 {
48		compatible = "samsung,exynos5250-pmu", "syscon";
49		reg = <0x10040000 0x5000>;
50		interrupt-controller;
51		#interrupt-cells = <3>;
52		interrupt-parent = <&gic>;
53		#clock-cells = <1>;
54		clock-names = "clkout0", "clkout1", "clkout2", "clkout3",
55				"clkout4", "clkout8", "clkout9";
56		clocks = <&clock CLK_OUT_DMC>, <&clock CLK_OUT_TOP>,
57			<&clock CLK_OUT_LEFTBUS>, <&clock CLK_OUT_RIGHTBUS>,
58			<&clock CLK_OUT_CPU>, <&clock CLK_XXTI>,
59			<&clock CLK_XUSBXTI>;
60	};
61	
62	Example of clock consumer :
63	
64	usb3503: usb3503@8 {
65		/* ... */
66		clock-names = "refclk";
67		clocks = <&pmu_system_controller 0>;
68		/* ... */
69	};
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