linux-kernel - [PATCH 2/2] dt-bindings: mediatek: mt8195: add memory-region property

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Message-ID: <20211130053905.28470-3-trevor.wu@mediatek.com>
Date:   Tue, 30 Nov 2021 13:39:05 +0800
From:   Trevor Wu <trevor.wu@...iatek.com>
To:     <broonie@...nel.org>, <tiwai@...e.com>, <robh+dt@...nel.org>,
        <matthias.bgg@...il.com>
CC:     <trevor.wu@...iatek.com>, <alsa-devel@...a-project.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <yc.hung@...iatek.com>
Subject: [PATCH 2/2] dt-bindings: mediatek: mt8195: add memory-region property

Add a required property "memory-region", which is used to specify memory
for DMA usage.

Signed-off-by: Trevor Wu <trevor.wu@...iatek.com>
---
 .../devicetree/bindings/sound/mt8195-afe-pcm.yaml         | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/mt8195-afe-pcm.yaml b/Documentation/devicetree/bindings/sound/mt8195-afe-pcm.yaml
index dcf790b053d2..6d0975b33d15 100644
--- a/Documentation/devicetree/bindings/sound/mt8195-afe-pcm.yaml
+++ b/Documentation/devicetree/bindings/sound/mt8195-afe-pcm.yaml
@@ -19,6 +19,12 @@ properties:
   interrupts:
     maxItems: 1
 
+  memory-region:
+    maxItems: 1
+    description: |
+      Shared memory region for AFE memif.  A "shared-dma-pool".
+      See ../reserved-memory/reserved-memory.txt for details.
+
   mediatek,topckgen:
     $ref: "/schemas/types.yaml#/definitions/phandle"
     description: The phandle of the mediatek topckgen controller
@@ -125,6 +131,7 @@ required:
   - power-domains
   - clocks
   - clock-names
+  - memory-region
 
 additionalProperties: false
 
@@ -139,6 +146,7 @@ examples:
         interrupts = <GIC_SPI 822 IRQ_TYPE_LEVEL_HIGH 0>;
         mediatek,topckgen = <&topckgen>;
         power-domains = <&spm 7>; //MT8195_POWER_DOMAIN_AUDIO
+        memory-region = <&snd_dma_mem_reserved>;
         clocks = <&clk26m>,
                  <&topckgen 163>, //CLK_TOP_APLL1
                  <&topckgen 166>, //CLK_TOP_APLL2
-- 
2.18.0