From: Soren Brinkmann <soren.brinkm...@xilinx.com>

Document the DT bindings for the Zynq UltraScale+ PM Firmware.

Signed-off-by: Soren Brinkmann <soren.brinkm...@xilinx.com>
Signed-off-by: Michal Simek <michal.si...@xilinx.com>
---

Changes in v2:
- Move to bindings/firmware and also add it to firmware node
  Reported-by Rob

 .../bindings/firmware/xlnx,zynqmp-pm.txt           | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 
Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt

diff --git a/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt 
b/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt
new file mode 100644
index 000000000000..7de0c82758b3
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt
@@ -0,0 +1,22 @@
+Xilinx Zynq MPSoC Firmware Device Tree Bindings
+
+The zynqmp-pm node describes the interface to platform firmware.
+
+Required properties:
+ - compatible: Must contain:  "xlnx,zynqmp-pm"
+ - method:     The method of calling the PM-API firmware layer.
+               Permitted values are:
+                - "smc" : To be used in configurations without a hypervisor
+                - "hvc" : To be used when hypervisor is present
+ - interrupts: Interrupt specifier
+
+Examples:
+
+       firmware {
+               zynqmp-firmware {
+                       compatible = "xlnx,zynqmp-pm";
+                       method = "smc";
+                       interrupt-parent = <&gic>;
+                       interrupts = <0 35 4>;
+               };
+       };
-- 
1.9.1

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