dt-bindings: bus: Add Hyper-V VMBus

Add dt-bindings for Hyper-V VMBus.

Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1679298460-11855-5-git-send-email-ssengar@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>

diff --git a/Documentation/devicetree/bindings/bus/microsoft,vmbus.yaml b/Documentation/devicetree/bindings/bus/microsoft,vmbus.yaml
new file mode 100644 (file)
index 0000000..a8d40c7
--- /dev/null
+++ b/Documentation/devicetree/bindings/bus/microsoft,vmbus.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/bus/microsoft,vmbus.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microsoft Hyper-V VMBus
+
+maintainers:
+  - Saurabh Sengar <ssengar@linux.microsoft.com>
+
+description:
+  VMBus is a software bus that implement the protocols for communication
+  between the root or host OS and guest OSs (virtual machines).
+
+properties:
+  compatible:
+    const: microsoft,vmbus
+
+  ranges: true
+
+  '#address-cells':
+    const: 2
+
+  '#size-cells':
+    const: 1
+
+required:
+  - compatible
+  - ranges
+  - '#address-cells'
+  - '#size-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    soc {
+        #address-cells = <2>;
+        #size-cells = <1>;
+        bus {
+            compatible = "simple-bus";
+            #address-cells = <2>;
+            #size-cells = <1>;
+            ranges;
+
+            vmbus@ff0000000 {
+                compatible = "microsoft,vmbus";
+                #address-cells = <2>;
+                #size-cells = <1>;
+                ranges = <0x0f 0xf0000000 0x0f 0xf0000000 0x10000000>;
+            };
+        };
+    };

diff --git a/MAINTAINERS b/MAINTAINERS
index 0e64787aace84000d521d749c44966c8126eb56d..90ea0a7fb73326d8de91c880411a533667a199a1 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9520,6 +9520,7 @@ S:        Supported
 T:     git git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git
 F:     Documentation/ABI/stable/sysfs-bus-vmbus
 F:     Documentation/ABI/testing/debugfs-hyperv
+F:     Documentation/devicetree/bindings/bus/microsoft,vmbus.yaml
 F:     Documentation/virt/hyperv
 F:     Documentation/networking/device_drivers/ethernet/microsoft/netvsc.rst
 F:     arch/arm64/hyperv