ASoC: dt-bindings: qcom,q6asm: convert to dtschema

Convert Qualcomm Audio Stream Manager (Q6ASM) bindings to DT schema.

The original bindings documented:
1. APR service node with compatibles: "qcom,q6asm" and
   "qcom,q6asm-v<MAJOR-NUMBER>.<MINOR-NUMBER>",
2. actual DAIs child node with compatible "qcom,q6asm-dais".

The conversion entirely drops (1) because the compatible is already
documented in bindings/soc/qcom/qcom,apr.yaml.  The
"qcom,q6asm-v<MAJOR-NUMBER>.<MINOR-NUMBER>" on the other hand is not
used at all - neither in existing DTS, nor in downstream sources - so
versions seems to be fully auto-detectable.

Another change done in conversion is adding "iommus" property, which is
already used in DTS and Linux driver.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220910091428.50418-11-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 112 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/qcom,q6asm-dais.yaml b/Documentation/devicetree/bindings/sound/qcom,q6asm-dais.yaml
new file mode 100644
index 000000000000..8deb8ffb143b
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/qcom,q6asm-dais.yaml
@@ -0,0 +1,112 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/qcom,q6asm-dais.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Audio Stream Manager (Q6ASM)
+
+maintainers:
+  - Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
+  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+
+description:
+  Q6ASM is one of the APR audio services on Q6DSP. Each of its subnodes
+  represent a dai with board specific configuration.
+
+properties:
+  compatible:
+    enum:
+      - qcom,q6asm-dais
+
+  iommus:
+    maxItems: 1
+
+  "#sound-dai-cells":
+    const: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^dai@[0-9]+$":
+    type: object
+    description:
+      Q6ASM Digital Audio Interface
+
+    properties:
+      reg:
+        maxItems: 1
+
+      direction:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [0, 1, 2]
+        description: |
+          The direction of the dai stream::
+           - Q6ASM_DAI_TX_RX (0) for both tx and rx
+           - Q6ASM_DAI_TX (1) for only tx (Capture/Encode)
+           - Q6ASM_DAI_RX (2) for only rx (Playback/Decode)
+
+      is-compress-dai:
+        type: boolean
+        description:
+          Compress offload dai.
+
+    dependencies:
+      is-compress-dai: ["direction"]
+
+    required:
+      - reg
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - "#sound-dai-cells"
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/soc/qcom,apr.h>
+    #include <dt-bindings/sound/qcom,q6asm.h>
+
+    apr {
+        compatible = "qcom,apr-v2";
+        qcom,domain = <APR_DOMAIN_ADSP>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        service@7 {
+            compatible = "qcom,q6asm";
+            reg = <APR_SVC_ASM>;
+            qcom,protection-domain = "avs/audio", "msm/adsp/audio_pd";
+
+            dais {
+                compatible = "qcom,q6asm-dais";
+                iommus = <&apps_smmu 0x1821 0x0>;
+                #address-cells = <1>;
+                #size-cells = <0>;
+                #sound-dai-cells = <1>;
+
+                dai@0 {
+                    reg = <0>;
+                };
+
+                dai@1 {
+                    reg = <1>;
+                };
+
+                dai@2 {
+                    reg = <2>;
+                    is-compress-dai;
+                    direction = <1>;
+                };
+            };
+        };
+    };