[PATCH v5 3/4] dt-bindings: firmware: Add bindings for xilinx firmware

[Nava kishore Manne]

Add documentation to describe Xilinx firmware driver bindings.
Firmware driver provides an interface to firmware APIs.
Interface APIs can be used by any driver to communicate
to Platform Management Unit.

Signed-off-by: Nava kishore Manne <nava.manne@xxxxxxxxxx>
---
Changes for v4:
                -Added new yaml file for xilinx firmware
                 as suggested by Rob.
Changes for v5:
                -Fixed some minor issues and updated the fpga node name to versal_fpga.

 .../firmware/xilinx/xlnx,zynqmp-firmware.yaml | 66 +++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmware.yaml

diff --git a/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmware.yaml b/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmware.yaml
new file mode 100644
index 000000000000..e6848c2dfb67
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmware.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/firmware/xilinx/xlnx,zynqmp-firmware.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Xilinx firmware driver
+
+maintainers:
+  - Nava kishore Manne <nava.manne@xxxxxxxxxx>
+
+description:
+  The zynqmp-firmware node describes the interface to platform firmware.
+  ZynqMP has an interface to communicate with secure firmware. Firmware
+  driver provides an interface to firmware APIs. Interface APIs can be
+  used by any driver to communicate to PMUFW(Platform Management Unit).
+  These requests include clock management, pin control, device control,
+  power management service, FPGA service and other platform management
+  services.
+
+properties:
+  compatible:
+    oneOf:
+      - description:
+          For implementations complying for Zynq Ultrascale+ MPSoC.
+        const: xlnx,zynqmp-firmware
+
+      - description:
+          For implementations complying for Versal.
+        const: xlnx,versal-firmware
+
+  method:
+    description: |
+                 The method of calling the PM-API firmware layer.
+                 Permitted values are.
+                 - "smc" : SMC #0, following the SMCCC
+                 - "hvc" : HVC #0, following the SMCCC
+
+    $ref: /schemas/types.yaml#/definitions/string-array
+    enum:
+      - smc
+      - hvc
+
+patternProperties:
+  "versal_fpga":
+    $ref: "../../fpga/xlnx,versal-fpga.yaml#"
+    description: Compatible of the FPGA device.
+    type: object
+
+    required:
+      - compatible
+
+required:
+  - compatible
+
+examples:
+  - |
+    versal-firmware {
+      compatible = "xlnx,versal-firmware";
+      method = "smc";
+      versal_fpga: versal_fpga {
+        compatible = "xlnx,versal-fpga";
+      };
+    };
+
+additionalProperties: false
-- 
2.17.1