It is desirable to reserve memory for the audio frontend.

Allow the "memory-region" property, to be used to point to a reserved
memory region.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 Documentation/devicetree/bindings/sound/mt8186-afe-pcm.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/mt8186-afe-pcm.yaml b/Documentation/devicetree/bindings/sound/mt8186-afe-pcm.yaml
index 7fe85b08f9df..f5af2cf18158 100644
--- a/Documentation/devicetree/bindings/sound/mt8186-afe-pcm.yaml
+++ b/Documentation/devicetree/bindings/sound/mt8186-afe-pcm.yaml
@@ -25,6 +25,10 @@ properties:
   reset-names:
     const: audiosys
 
+  memory-region:
+    description: memory region for audio DMA buffers
+    maxItems: 1
+
   mediatek,apmixedsys:
     $ref: /schemas/types.yaml#/definitions/phandle
     description: The phandle of the mediatek apmixedsys controller
@@ -170,6 +174,7 @@ examples:
                       "top_apll12_div_tdm",
                       "top_mux_audio_h",
                       "top_clk26m_clk";
+        memory-region = <&afe_dma_mem>;
     };
 
 ...
-- 
2.49.0.805.g082f7c87e0-goog

On Thu, 24 Apr 2025 18:24:58 +0800, Chen-Yu Tsai wrote:
> It is desirable to reserve memory for the audio frontend.
> 
> Allow the "memory-region" property, to be used to point to a reserved
> memory region.
> 
> Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
> ---
>  Documentation/devicetree/bindings/sound/mt8186-afe-pcm.yaml | 5 +++++
>  1 file changed, 5 insertions(+)
> 

Acked-by: Rob Herring (Arm) <robh@kernel.org>