[PATCH 1/2] dt-bindings: power: Add ZynqMP power domain bindings

[Jolly Shah]

Add documentation to describe ZynqMP power domain bindings.

Signed-off-by: Jolly Shah <jollys@xxxxxxxxxx>
Signed-off-by: Rajan Vaja <rajanv@xxxxxxxxxx>
---
 .../devicetree/bindings/power/zynqmp-genpd.txt     | 46 ++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/zynqmp-genpd.txt

diff --git a/Documentation/devicetree/bindings/power/zynqmp-genpd.txt b/Documentation/devicetree/bindings/power/zynqmp-genpd.txt
new file mode 100644
index 0000000..25f9711
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/zynqmp-genpd.txt
@@ -0,0 +1,46 @@
+Device Tree bindings for Xilinx Zynq MPSoC PM domains
+
+The binding for zynqmp-genpd follow the common generic PM domain binding[1].
+
+[1] Documentation/devicetree/bindings/power/power_domain.txt
+
+== Zynq MPSoC Generic PM Domain Node ==
+
+Required properties:
+ - compatible: Must be: "xlnx,zynqmp-genpd"
+
+This node contains a number of subnodes, each representing a single PM domain
+that PM domain consumer devices reference.
+
+== PM Domain Nodes ==
+
+Required properties:
+ - #power-domain-cells: Number of cells in a PM domain specifier. Must be 0.
+ - pd-id: List of domain identifiers of as defined by platform firmware. These
+	  identifiers are passed to the PM firmware.
+
+Example:
+	zynqmp-genpd {
+		compatible = "xlnx,zynqmp-genpd";
+
+		pd_usb0: pd-usb0 {
+			pd-id = <22>;
+			#power-domain-cells = <0>;
+		};
+
+		pd_sata: pd-sata {
+			pd-id = <28>;
+			#power-domain-cells = <0>;
+		};
+
+		pd_gpu: pd-gpu {
+			pd-id = <58 20 21>;
+			#power-domain-cells = <0x0>;
+		};
+	};
+
+	sata0: ahci@SATA_AHCI_HBA {
+		...
+		power-domains = <&pd_sata>;
+		...
+	};
-- 
2.7.4