[PATCH v3 2/7] dt-bindings: allwinner: add H616 sun4i audio codec binding

[Ryan Walklin <ryan@testtoast.com>]

The H616 has an audio codec compatible with the sun4i-a10 driver.

The codec is relatively cut down compared to some of the other Allwinner
SoCs and only has a single line-out route (relying on a separate digital
microphone IP block for input). HDMI and SPDIF audio are handled
separately by an audio hub IP block, which is not currently implemented
in mainline kernels. This requires some additional flexibility in the
DMA bindings.

Add compatible string and routing for the H616 audio codec, and update
the required DMA descriptions.

Signed-off-by: Ryan Walklin <ryan@testtoast.com>

---
Changelog v1..v2:
- Remove PLL_AUDIO_4X clock from definition (defined internally but
  not used by driver and so not required in DTSI)
- Restrict TX-only DMA definition to H616

Changelog v2..v3:

- Fix missing - in H616 conditional binding reported by dt_binding_check.
---
 .../sound/allwinner,sun4i-a10-codec.yaml      | 53 ++++++++++++++++---
 1 file changed, 47 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/allwinner,sun4i-a10-codec.yaml b/Documentation/devicetree/bindings/sound/allwinner,sun4i-a10-codec.yaml
index 78273647f7665..ebc9097f936ad 100644
--- a/Documentation/devicetree/bindings/sound/allwinner,sun4i-a10-codec.yaml
+++ b/Documentation/devicetree/bindings/sound/allwinner,sun4i-a10-codec.yaml
@@ -22,6 +22,7 @@ properties:
       - allwinner,sun8i-a23-codec
       - allwinner,sun8i-h3-codec
       - allwinner,sun8i-v3s-codec
+      - allwinner,sun50i-h616-codec
 
   reg:
     maxItems: 1
@@ -40,14 +41,20 @@ properties:
       - const: codec
 
   dmas:
-    items:
-      - description: RX DMA Channel
-      - description: TX DMA Channel
+    oneOf:
+      - items:
+          - description: RX DMA Channel
+          - description: TX DMA Channel
+      - items:
+          - description: TX DMA Channel
 
   dma-names:
-    items:
-      - const: rx
-      - const: tx
+    oneOf:
+      - items:
+          - const: rx
+          - const: tx
+      - items:
+          - const: tx
 
   resets:
     maxItems: 1
@@ -229,6 +236,40 @@ allOf:
               - Mic
               - Speaker
 
+  - if:
+      properties:
+        compatible:
+          enum:
+            - allwinner,sun50i-h616-codec
+
+    then:
+      properties:
+        allwinner,audio-routing:
+          items:
+            enum:
+              - LINEOUT
+              - Line Out
+
+        dmas:
+          items:
+            - description: TX DMA Channel
+
+        dma-names:
+          items:
+            - const: tx
+
+    else:
+      properties:
+        dmas:
+          items:
+            - description: RX DMA Channel
+            - description: TX DMA Channel
+
+        dma-names:
+          items:
+            - const: rx
+            - const: tx
+
 unevaluatedProperties: false
 
 examples:
-- 
2.47.0