mfd: devicetree: bindings: Document PM8921/8058 PMICs

Qualcomm PM8xxx PMIC multi-function devices

PROPERTIES

- compatible:

	Usage: required

	Value type: <string>

	Definition: must be one of:

		    "qcom,pm8058"

		    "qcom,pm8921"

- #address-cells:

	Usage: required

	Value type: <u32>

	Definition: must be 1

- #size-cells:

	Usage: required

	Value type: <u32>

	Definition: must be 0

- interrupts:

	Usage: required

	Value type: <prop-encoded-array>

	Definition: specifies the interrupt that indicates a subdevice

		    has generated an interrupt (summary interrupt). The

		    format of the specifier is defined by the binding document

		    describing the node's interrupt parent.

- #interrupt-cells:

	Usage: required

	Value type : <u32>

	Definition: must be 2. Specifies the number of cells needed to encode

		    an interrupt source. The 1st cell contains the interrupt

		    number. The 2nd cell is the trigger type and level flags

		    encoded as follows:

			1 = low-to-high edge triggered

			2 = high-to-low edge triggered

			4 = active high level-sensitive

			8 = active low level-sensitive

- interrupt-controller:

	Usage: required

	Value type: <empty>

	Definition: identifies this node as an interrupt controller

EXAMPLE

	pmicintc: pmic@0 {

		compatible = "qcom,pm8921";

		interrupts = <104 8>;

		#interrupt-cells = <2>;

		interrupt-controller;

		#address-cells = <1>;

		#size-cells = <0>;

		pwrkey {

			compatible = "qcom,pm8921-pwrkey";

			interrupt-parent = <&pmicintc>;

			interrupts = <50 1>, <51 1>;

		};

	};