1* Samsung S3C2443 Clock Controller 2 3The S3C2443 clock controller generates and supplies clock to various controllers 4within the SoC. The clock binding described here is applicable to all SoCs in 5the s3c24x family starting with the s3c2443. 6 7Required Properties: 8 9- compatible: should be one of the following. 10 - "samsung,s3c2416-clock" - controller compatible with S3C2416 SoC. 11 - "samsung,s3c2443-clock" - controller compatible with S3C2443 SoC. 12 - "samsung,s3c2450-clock" - controller compatible with S3C2450 SoC. 13- reg: physical base address of the controller and length of memory mapped 14 region. 15- #clock-cells: should be 1. 16 17Each clock is assigned an identifier and client nodes can use this identifier 18to specify the clock which they consume. Some of the clocks are available only 19on a particular SoC. 20 21All available clocks are defined as preprocessor macros in 22dt-bindings/clock/s3c2443.h header and can be used in device 23tree sources. 24 25External clocks: 26 27There are several clocks that are generated outside the SoC. It is expected 28that they are defined using standard clock bindings with following 29clock-output-names: 30 - "xti" - crystal input - required, 31 - "ext" - external clock source - optional, 32 - "ext_i2s" - external I2S clock - optional, 33 - "ext_uart" - external uart clock - optional, 34 35Example: Clock controller node: 36 37 clocks: clock-controller@4c000000 { 38 compatible = "samsung,s3c2416-clock"; 39 reg = <0x4c000000 0x40>; 40 #clock-cells = <1>; 41 }; 42 43Example: UART controller node that consumes the clock generated by the clock 44 controller (refer to the standard clock bindings for information about 45 "clocks" and "clock-names" properties): 46 47 serial@50004000 { 48 compatible = "samsung,s3c2440-uart"; 49 reg = <0x50004000 0x4000>; 50 interrupts = <1 23 3 4>, <1 23 4 4>; 51 clock-names = "uart", "clk_uart_baud2", 52 "clk_uart_baud3"; 53 clocks = <&clocks PCLK_UART0>, <&clocks PCLK_UART0>, 54 <&clocks SCLK_UART>; 55 }; 56