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Documentation / devicetree / bindings / clock / samsung,s3c2412-clock.txt




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Based on kernel version 3.16. Page generated on 2014-08-06 21:36 EST.

1	* Samsung S3C2412 Clock Controller
2	
3	The S3C2412 clock controller generates and supplies clock to various controllers
4	within the SoC. The clock binding described here is applicable to the s3c2412
5	and s3c2413 SoCs in the s3c24x family.
6	
7	Required Properties:
8	
9	- compatible: should be "samsung,s3c2412-clock"
10	- reg: physical base address of the controller and length of memory mapped
11	  region.
12	- #clock-cells: should be 1.
13	
14	Each clock is assigned an identifier and client nodes can use this identifier
15	to specify the clock which they consume. Some of the clocks are available only
16	on a particular SoC.
17	
18	All available clocks are defined as preprocessor macros in
19	dt-bindings/clock/s3c2412.h header and can be used in device
20	tree sources.
21	
22	External clocks:
23	
24	There are several clocks that are generated outside the SoC. It is expected
25	that they are defined using standard clock bindings with following
26	clock-output-names:
27	 - "xti" - crystal input - required,
28	 - "ext" - external clock source - optional,
29	
30	Example: Clock controller node:
31	
32		clocks: clock-controller@4c000000 {
33			compatible = "samsung,s3c2412-clock";
34			reg = <0x4c000000 0x20>;
35			#clock-cells = <1>;
36		};
37	
38	Example: UART controller node that consumes the clock generated by the clock
39	  controller (refer to the standard clock bindings for information about
40	  "clocks" and "clock-names" properties):
41	
42		serial@50004000 {
43			compatible = "samsung,s3c2412-uart";
44			reg = <0x50004000 0x4000>;
45			interrupts = <1 23 3 4>, <1 23 4 4>;
46			clock-names = "uart", "clk_uart_baud2", "clk_uart_baud3";
47			clocks = <&clocks PCLK_UART0>, <&clocks PCLK_UART0>,
48				 <&clocks SCLK_UART>;
49			status = "disabled";
50		};
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