xref: /freebsd/sys/contrib/device-tree/Bindings/c6x/clocks.txt (revision c66ec88fed842fbaad62c30d510644ceb7bd2d71)

C6X PLL Clock Controllers
-------------------------

This is a first-cut support for the SoC clock controllers. This is still
under development and will probably change as the common device tree
clock support is added to the kernel.

Required properties:

- compatible: "ti,c64x+pll"
    May also have SoC-specific value to support SoC-specific initialization
    in the driver. One of:
        "ti,c6455-pll"
        "ti,c6457-pll"
        "ti,c6472-pll"
        "ti,c6474-pll"

- reg: base address and size of register area
- clock-frequency: input clock frequency in hz


Optional properties:

- ti,c64x+pll-bypass-delay: CPU cycles to delay when entering bypass mode

- ti,c64x+pll-reset-delay:  CPU cycles to delay after PLL reset

- ti,c64x+pll-lock-delay:   CPU cycles to delay after PLL frequency change

Example:

	clock-controller@29a0000 {
		compatible = "ti,c6472-pll", "ti,c64x+pll";
		reg = <0x029a0000 0x200>;
		clock-frequency = <25000000>;

		ti,c64x+pll-bypass-delay = <200>;
		ti,c64x+pll-reset-delay = <12000>;
		ti,c64x+pll-lock-delay = <80000>;
	};