1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
SAMSUNG Exynos SoC series PMU Registers
Properties:
- compatible : should contain two values. First value must be one from following list:
- "samsung,exynos3250-pmu" - for Exynos3250 SoC,
- "samsung,exynos4210-pmu" - for Exynos4210 SoC,
- "samsung,exynos4212-pmu" - for Exynos4212 SoC,
- "samsung,exynos4412-pmu" - for Exynos4412 SoC,
- "samsung,exynos5250-pmu" - for Exynos5250 SoC,
- "samsung,exynos5420-pmu" - for Exynos5420 SoC.
second value must be always "syscon".
- reg : offset and length of the register set.
- #clock-cells : must be <1>, since PMU requires once cell as clock specifier.
The single specifier cell is used as index to list of clocks
provided by PMU, which is currently:
0 : SoC clock output (CLKOUT pin)
- clock-names : list of clock names for particular CLKOUT mux inputs in
following format:
"clkoutN", where N is a decimal number corresponding to
CLKOUT mux control bits value for given input, e.g.
"clkout0", "clkout7", "clkout15".
- clocks : list of phandles and specifiers to all input clocks listed in
clock-names property.
Example :
pmu_system_controller: system-controller@10040000 {
compatible = "samsung,exynos5250-pmu", "syscon";
reg = <0x10040000 0x5000>;
#clock-cells = <1>;
clock-names = "clkout0", "clkout1", "clkout2", "clkout3",
"clkout4", "clkout8", "clkout9";
clocks = <&clock CLK_OUT_DMC>, <&clock CLK_OUT_TOP>,
<&clock CLK_OUT_LEFTBUS>, <&clock CLK_OUT_RIGHTBUS>,
<&clock CLK_OUT_CPU>, <&clock CLK_XXTI>,
<&clock CLK_XUSBXTI>;
};
Example of clock consumer :
usb3503: usb3503@08 {
/* ... */
clock-names = "refclk";
clocks = <&pmu_system_controller 0>;
/* ... */
};
|
