Commit | Line | Data |
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7d03fed8 HS |
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>; | |
7d03fed8 | 49 | }; |