[PATCH v5 1/2] dt-bindings: misc: fastrpc convert bindings to yaml

[Abel Vesa <abel.vesa@linaro.org>]

Convert Qualcomm FastRPC bindings to yaml format, so that we could validate
dt-entries correctly and any future additions can go into yaml format.

Use compute-cb@ subnodes instead of just cb@.

Also add qcom,non-secure-domain, qcom,glink-channels and
qcom,smd-channels missing properties to make sure dtbs_check doesn't
fail right off the bat.

Co-developed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Co-developed-by: David Heidelberg <david@ixit.cz>
Signed-off-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
---

Changes since v4:
 * set global additionalProperties to false and removed the one for
 patternProperties
 * fixed compute-cb property to allow more than 9 nodes.
 * added missing qcom,glink-channels, qcom,non-secure-domain and
 qcom,smd-channels, without which the dtbs_check would fail

 .../bindings/misc/qcom,fastrpc.yaml           | 108 ++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml

diff --git a/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml b/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml
new file mode 100644
index 000000000000..3c11a3741994
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml
@@ -0,0 +1,108 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/misc/qcom,fastrpc.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Qualcomm FastRPC Driver
+
+maintainers:
+  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+
+description: |
+  The FastRPC implements an IPC (Inter-Processor Communication)
+  mechanism that allows for clients to transparently make remote method
+  invocations across DSP and APPS boundaries. This enables developers
+  to offload tasks to the DSP and free up the application processor for
+  other tasks.
+
+properties:
+  compatible:
+    items:
+      - const: qcom,fastrpc
+
+  label:
+    items:
+      enum:
+        - adsp
+        - mdsp
+        - sdsp
+        - cdsp
+
+  qcom,glink-channels:
+    description:
+      A list of channels tied to this function, used for matching
+      the function to a set of virtual channels.
+    $ref: "/schemas/types.yaml#/definitions/string-array"
+
+  qcom,non-secure-domain:
+    description:
+      Used to mark the current domain as non-secure.
+    type: boolean
+
+  qcom,smd-channels:
+    description:
+      Channel name used for the RPM communication
+    $ref: "/schemas/types.yaml#/definitions/string-array"
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+patternProperties:
+  "(compute-)?cb@[0-9]*$":
+    type: object
+
+    description: >
+      Each subnode of the Fastrpc represents compute context banks available on the dsp.
+
+    properties:
+      compatible:
+        items:
+          - const: qcom,fastrpc-compute-cb
+
+      reg:
+        maxItems: 1
+
+      qcom,nsession:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        default: 1
+        description: >
+          A value indicating how many sessions can share this context bank.
+
+    required:
+      - compatible
+      - reg
+
+required:
+  - compatible
+  - label
+  - '#address-cells'
+  - '#size-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    smd-edge {
+        label = "lpass";
+        fastrpc {
+            compatible = "qcom,fastrpc";
+            label = "adsp";
+            qcom,smd-channels = "fastrpcsmd-apps-dsp";
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            compute-cb@1 {
+                compatible = "qcom,fastrpc-compute-cb";
+                reg = <1>;
+            };
+
+            compute-cb@2 {
+                compatible = "qcom,fastrpc-compute-cb";
+                reg = <2>;
+            };
+        };
+    };
-- 
2.34.1