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

   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         };