linux-kernel - [PATCH 2/8] dt-bindings: dma: mediatek,uart-dma: Deprecate mediatek,dma-33bits

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Message-ID: <20251113122229.23998-3-angelogioacchino.delregno@collabora.com>
Date: Thu, 13 Nov 2025 13:22:23 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: dmaengine@...r.kernel.org
Cc: sean.wang@...iatek.com,
	vkoul@...nel.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	matthias.bgg@...il.com,
	angelogioacchino.delregno@...labora.com,
	long.cheng@...iatek.com,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	kernel@...labora.com
Subject: [PATCH 2/8] dt-bindings: dma: mediatek,uart-dma: Deprecate mediatek,dma-33bits

While this property wants to express a capability of the hardware,
this is only used by the driver itself to vary the DMA bits during
probe.

Different hardware shall instead have different compatible strings.

Following the driver cleanup and the introduction of a specific
compatible string for the APDMA IP version found in MT6795, set
the "mediatek,dma-33bits" vendor property as deprecated.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 Documentation/devicetree/bindings/dma/mediatek,uart-dma.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/dma/mediatek,uart-dma.yaml b/Documentation/devicetree/bindings/dma/mediatek,uart-dma.yaml
index 10fc92b60de5..4d927726df93 100644
--- a/Documentation/devicetree/bindings/dma/mediatek,uart-dma.yaml
+++ b/Documentation/devicetree/bindings/dma/mediatek,uart-dma.yaml
@@ -59,6 +59,7 @@ properties:
 
   mediatek,dma-33bits:
     type: boolean
+    deprecated: true
     description: Enable 33-bits UART APDMA support
 
 required:
-- 
2.51.1