1* Samsung S3C2412 Clock Controller 2 3The S3C2412 clock controller generates and supplies clock to various controllers 4within the SoC. The clock binding described here is applicable to the s3c2412 5and s3c2413 SoCs in the s3c24x family. 6 7Required 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 14Each clock is assigned an identifier and client nodes can use this identifier 15to specify the clock which they consume. Some of the clocks are available only 16on a particular SoC. 17 18All available clocks are defined as preprocessor macros in 19dt-bindings/clock/s3c2412.h header and can be used in device 20tree sources. 21 22External clocks: 23 24There are several clocks that are generated outside the SoC. It is expected 25that they are defined using standard clock bindings with following 26clock-output-names: 27 - "xti" - crystal input - required, 28 - "ext" - external clock source - optional, 29 30Example: Clock controller node: 31 32 clocks: clock-controller@4c000000 { 33 compatible = "samsung,s3c2412-clock"; 34 reg = <0x4c000000 0x20>; 35 #clock-cells = <1>; 36 }; 37 38Example: 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 }; 50