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
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+++ 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
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