[PATCH v5 1/3] ASoC: dt-bindings: support imx95's CM7 core

Laurentiu Mihalcea
2025-03-11T16:37:51Z

Add binding for imx95's CM7 core, used for audio processing.
Additionally, introduce a common binding for NXP audio processors with
Sound Open Firmware (SOF) support.

Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Iuliana Prodan <iuliana.prodan@nxp.com>
---
.../bindings/sound/fsl,imx95-cm7-sof.yaml | 64 +++++++++++++++++++
.../bindings/sound/fsl,sof-cpu.yaml | 27 ++++++++
2 files changed, 91 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/fsl,imx95-cm7-sof.yaml
create mode 100644 Documentation/devicetree/bindings/sound/fsl,sof-cpu.yaml

diff --git a/Documentation/devicetree/bindings/sound/fsl,imx95-cm7-sof.yaml b/Documentation/devicetree/bindings/sound/fsl,imx95-cm7-sof.yaml
new file mode 100644
index 000000000000..f00ae3219e15
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/fsl,imx95-cm7-sof.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/fsl,imx95-cm7-sof.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP imx95 CM7 core
+
+maintainers:
+ - Daniel Baluta <daniel.baluta@nxp.com>
+
+description: NXP imx95 CM7 core used for audio processing
+
+properties:
+ compatible:
+ const: fsl,imx95-cm7-sof
+
+ reg:
+ maxItems: 1
+
+ reg-names:
+ const: sram
+
+ memory-region:
+ maxItems: 1
+
+ memory-region-names:
+ const: dma
+
+ port:
+ description: SAI3 port
+ $ref: audio-graph-port.yaml#
+ unevaluatedProperties: false
+
+required:
+ - compatible
+ - reg
+ - reg-names
+ - memory-region
+ - memory-region-names
+ - port
+
+allOf:
+ - $ref: fsl,sof-cpu.yaml#
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ cm7-cpu@80000000 {
+ compatible = "fsl,imx95-cm7-sof";
+ reg = <0x80000000 0x6100000>;
+ reg-names = "sram";
+ mboxes = <&mu7 2 0>, <&mu7 2 1>, <&mu7 3 0>, <&mu7 3 1>;
+ mbox-names = "txdb0", "txdb1", "rxdb0", "rxdb1";
+ memory-region = <&adma_res>;
+ memory-region-names = "dma";
+ port {
+ /* SAI3-WM8962 link */
+ endpoint {
+ remote-endpoint = <&wm8962_ep>;
+ };
+ };
+ };
diff --git a/Documentation/devicetree/bindings/sound/fsl,sof-cpu.yaml b/Documentation/devicetree/bindings/sound/fsl,sof-cpu.yaml
new file mode 100644
index 000000000000..31863932dbc3
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/fsl,sof-cpu.yaml
@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/fsl,sof-cpu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP audio processor common properties
+
+maintainers:
+ - Daniel Baluta <daniel.baluta@nxp.com>
+
+properties:
+ mboxes:
+ maxItems: 4
+
+ mbox-names:
+ items:
+ - const: txdb0
+ - const: txdb1
+ - const: rxdb0
+ - const: rxdb1
+
+required:
+ - mboxes
+ - mbox-names
+
+additionalProperties: true
--
2.34.1