linux-kernel - [PATCH v2 2/8] dt-bindings: dsp: fsl,dsp: Add resets property

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Message-Id: <20250219192102.423850-3-daniel.baluta@nxp.com>
Date: Wed, 19 Feb 2025 21:20:56 +0200
From: Daniel Baluta <daniel.baluta@....com>
To: p.zabel@...gutronix.de,
	robh@...nel.org,
	shawnguo@...nel.org
Cc: krzk+dt@...nel.org,
	conor+dt@...nel.org,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	mathieu.poirier@...aro.org,
	shengjiu.wang@....com,
	Frank.Li@....com,
	peng.fan@....com,
	laurentiu.mihalcea@....com,
	iuliana.prodan@....com,
	Daniel Baluta <daniel.baluta@....com>
Subject: [PATCH v2 2/8] dt-bindings: dsp: fsl,dsp: Add resets property

On i.MX8MP we introduced support for using a reset controller
to control DSP operation.

This patch adds reset property which is required for i.MX8MP.

Signed-off-by: Daniel Baluta <daniel.baluta@....com>
---
 .../devicetree/bindings/dsp/fsl,dsp.yaml      | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml b/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml
index ab93ffd3d2e5..923e7f079f1b 100644
--- a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml
+++ b/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml
@@ -82,6 +82,13 @@ properties:
     description:
       Phandle to syscon block which provide access for processor enablement
 
+  resets:
+    description:
+      A pair consisting of phandle to audio-blk-control and an index referencing
+      the DSP Run/Stall bit in audiomix registers.
+      See include/dt-bindings/reset/imx8mp-reset-audiomix.h for each index meaning.
+    maxItems: 1
+
 required:
   - compatible
   - reg
@@ -164,6 +171,16 @@ allOf:
             - const: txdb1
             - const: rxdb0
             - const: rxdb1
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,imx8mp-dsp
+              - fsl,imx8mp-hifi4
+    then:
+      required:
+        - "resets"
 
 additionalProperties: false
 
@@ -220,5 +237,5 @@ examples:
                <&mu2 3 0>;
       memory-region = <&dsp_vdev0buffer>, <&dsp_vdev0vring0>,
                       <&dsp_vdev0vring1>, <&dsp_reserved>;
-      fsl,dsp-ctrl = <&audio_blk_ctrl>;
+      resets = <&audio_blk_ctrl IMX8MP_AUDIOMIX_DSP>;
     };
-- 
2.25.1