bindings: Snapshot of dma-buf-heaps bindings

Dma-Buf-Heaps bindings snapshot from msm-6.1 branch
commit 0285b5bf8b6f ("Merge "ARM: dts: msm: Update proxy device
settings"").

Change-Id: Ia18e0e612b848ce4ad7bb4000ca35f1a7dea5ec7
Signed-off-by: Patrick Daly <quic_pdaly@quicinc.com>

bindings/soc/qcom/qcom,mem-buf.yaml

@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/soc/qcom/qcom,mem-buf.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Qualcomm Technologies, Inc. Memory Buffer Sharing binding
+
+maintainers:
+  - Chris Goldsworthy
+
+description: |
+  The memory buffer sharing driver is used for lending memory
+  from one virtual machine to another.
+
+properties:
+  compatible:
+    items:
+      - const: qcom,mem-buf
+  qcom,vmid:
+    description: integer ID of the current virtual machine.
+
+  qcom,mem-buf-capabilities:
+    oneOf:
+      - const: supplier
+        description:
+          Allows the mem-buf driver to supply memory to other VMs through
+          remote allocation requests.
+
+      - const: consumer
+        description:
+          Allows the mem-buf driver to request and accept memory from
+          other VMs. VMs with only this capability cannot satisfy remote
+          allocation requests.
+
+      - const: dual
+        description:
+          Allows the mem-buf driver to supply memory to other VMs through
+          remote allocation requests, as well as request and accept memory
+          from other VMs
+
+required:
+  - compatible
+  - qcom,mem-buf-capabilities
+
+examples:
+  - |
+    qcom,mem-buf {
+        compatible = "qcom,mem-buf";
+        qcom,mem-buf-capabilities = "supplier";
+    };
+
+description: |
+  Provides inter-VM message transfer services to the qcom,mem-buf driver
+
+properties:
+  compatible:
+    items:
+      - const: qcom,mem-buf-msgq
+
+required:
+  - compatible