kernel/Documentation/devicetree/bindings/c6x/clocks.txt

   1 C6X PLL Clock Controllers
   2 -------------------------
   3
   4 This is a first-cut support for the SoC clock controllers. This is still
   5 under development and will probably change as the common device tree
   6 clock support is added to the kernel.
   7
   8 Required properties:
   9
  10 - compatible: "ti,c64x+pll"
  11     May also have SoC-specific value to support SoC-specific initialization
  12     in the driver. One of:
  13         "ti,c6455-pll"
  14         "ti,c6457-pll"
  15         "ti,c6472-pll"
  16         "ti,c6474-pll"
  17
  18 - reg: base address and size of register area
  19 - clock-frequency: input clock frequency in hz
  20
  21
  22 Optional properties:
  23
  24 - ti,c64x+pll-bypass-delay: CPU cycles to delay when entering bypass mode
  25
  26 - ti,c64x+pll-reset-delay:  CPU cycles to delay after PLL reset
  27
  28 - ti,c64x+pll-lock-delay:   CPU cycles to delay after PLL frequency change
  29
  30 Example:
  31
  32         clock-controller@29a0000 {
  33                 compatible = "ti,c6472-pll", "ti,c64x+pll";
  34                 reg = <0x029a0000 0x200>;
  35                 clock-frequency = <25000000>;
  36
  37                 ti,c64x+pll-bypass-delay = <200>;
  38                 ti,c64x+pll-reset-delay = <12000>;
  39                 ti,c64x+pll-lock-delay = <80000>;
  40         };