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Documentation / devicetree / bindings / clock / exynos5410-clock.txt




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Based on kernel version 4.9. Page generated on 2016-12-21 14:29 EST.

1	* Samsung Exynos5410 Clock Controller
2	
3	The Exynos5410 clock controller generates and supplies clock to various
4	controllers within the Exynos5410 SoC.
5	
6	Required Properties:
7	
8	- compatible: should be "samsung,exynos5410-clock"
9	
10	- reg: physical base address of the controller and length of memory mapped
11	  region.
12	
13	- #clock-cells: should be 1.
14	
15	- clocks: should contain an entry specifying the root clock from external
16	  oscillator supplied through XXTI or XusbXTI pin.  This clock should be
17	  defined using standard clock bindings with "fin_pll" clock-output-name.
18	  That clock is being passed internally to the 9 PLLs.
19	
20	All available clocks are defined as preprocessor macros in
21	dt-bindings/clock/exynos5410.h header and can be used in device
22	tree sources.
23	
24	Example 1: An example of a clock controller node is listed below.
25	
26		fin_pll: xxti {
27			compatible = "fixed-clock";
28			clock-frequency = <24000000>;
29			clock-output-names = "fin_pll";
30			#clock-cells = <0>;
31		};
32	
33		clock: clock-controller@0x10010000 {
34			compatible = "samsung,exynos5410-clock";
35			reg = <0x10010000 0x30000>;
36			#clock-cells = <1>;
37			clocks = <&fin_pll>;
38		};
39	
40	Example 2: UART controller node that consumes the clock generated by the clock
41		   controller. Refer to the standard clock bindings for information
42		   about 'clocks' and 'clock-names' property.
43	
44		serial@12C20000 {
45			compatible = "samsung,exynos4210-uart";
46			reg = <0x12C00000 0x100>;
47			interrupts = <0 51 0>;
48			clocks = <&clock CLK_UART0>, <&clock CLK_SCLK_UART0>;
49			clock-names = "uart", "clk_uart_baud0";
50		};
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