dt-bindings: soc: Add ZynqMP PM bindings

Add documentation to describe Xilinx ZynqMP power management
bindings.

Signed-off-by: Jolly Shah <jollys@xilinx.com>
Signed-off-by: Rajan Vaja <rajanv@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/Documentation/devicetree/bindings/soc/xilinx/xlnx,zynqmp-power.txt b/Documentation/devicetree/bindings/soc/xilinx/xlnx,zynqmp-power.txt
new file mode 100644 (file)
index 0000000..5b7d963
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+++ b/Documentation/devicetree/bindings/soc/xilinx/xlnx,zynqmp-power.txt
@@ -0,0 +1,28 @@
+Xilinx Zynq MPSoC Power Management Device Tree Bindings
+
+The zynqmp-power node describes the power management configurations.
+
+Required properties:
+ - compatible  : Must contain:  "xlnx,zynqmp-power"
+ - mbox-names  : Name given to channels seen in the 'mboxes' property.
+                 "rx" - Mailbox corresponding to receive path
+                 "tx" - Mailbox corresponding to transmit path
+ - mboxes      : Standard property to specify a Mailbox. Each value of
+                 the mboxes property should contain a phandle to the
+                 mailbox controller device node and an args specifier
+                 that will be the phandle to the intended sub-mailbox
+                 child node to be used for communication. See
+                 Documentation/devicetree/bindings/mailbox/mailbox.txt
+                 for more details about the generic mailbox controller
+                 and client driver bindings. Also see
+                 Documentation/devicetree/bindings/mailbox/ \
+                 xlnx,zynqmp-ipi-mailbox.txt for typical controller that
+                 is used to communicate with this System controllers.
+
+Examples:
+       zynqmp_power: zynqmp-power {
+               compatible = "xlnx,zynqmp-power";
+               mboxes = <&ipi_mailbox_pmu0 0>,
+                        <&ipi_mailbox_pmu0 1>;
+               mbox-names = "tx", "rx";
+       };