dt-bindings: clock: Document qcom,hfpll

High-Frequency PLL (HFPLL)

PROPERTIES

- compatible:

	Usage: required

	Value type: <string>:

		shall contain only one of the following. The generic

		compatible "qcom,hfpll" should be also included.

                        "qcom,hfpll-ipq8064", "qcom,hfpll"

                        "qcom,hfpll-apq8064", "qcom,hfpll"

                        "qcom,hfpll-msm8974", "qcom,hfpll"

                        "qcom,hfpll-msm8960", "qcom,hfpll"

- reg:

	Usage: required

	Value type: <prop-encoded-array>

	Definition: address and size of HPLL registers. An optional second

		    element specifies the address and size of the alias

		    register region.

- clocks:

	Usage: required

	Value type: <prop-encoded-array>

	Definition: reference to the xo clock.

- clock-names:

	Usage: required

	Value type: <stringlist>

	Definition: must be "xo".

- clock-output-names:

	Usage: required

	Value type: <string>

	Definition: Name of the PLL. Typically hfpllX where X is a CPU number

		    starting at 0. Otherwise hfpll_Y where Y is more specific

		    such as "l2".

Example:

1) An HFPLL for the L2 cache.

	clock-controller@f9016000 {

		compatible = "qcom,hfpll-ipq8064", "qcom,hfpll";

		reg = <0xf9016000 0x30>;

		clocks = <&xo_board>;

		clock-names = "xo";

		clock-output-names = "hfpll_l2";

	};

2) An HFPLL for CPU0. This HFPLL has the alias register region.

	clock-controller@f908a000 {

		compatible = "qcom,hfpll-ipq8064", "qcom,hfpll";

		reg = <0xf908a000 0x30>, <0xf900a000 0x30>;

		clocks = <&xo_board>;

		clock-names = "xo";

		clock-output-names = "hfpll0";

	};