linux-kernel - [PATCH 0/3] Rewrite MediaTek UART APDMA driver to support more than 33 bits

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Message-Id: <20250921-uart-apdma-v1-0-107543c7102c@proton.me>
Date: Sun, 21 Sep 2025 14:03:39 +0300
From: Max Shevchenko via B4 Relay <devnull+wctrl.proton.me@...nel.org>
To: Sean Wang <sean.wang@...iatek.com>, Vinod Koul <vkoul@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Long Cheng <long.cheng@...iatek.com>
Cc: dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Max Shevchenko <wctrl@...ton.me>
Subject: [PATCH 0/3] Rewrite MediaTek UART APDMA driver to support more
 than 33 bits

This patch series aims to support more than 33 bits for the MediaTek
APDMA driver, since newer SoCs like MT6795, MT6779 or MT6985 have higher
values for the DMA bitmask.

The reference SoCs for bitmask values were taken from the downstream
kernel (6.6) for the MT6991 SoC. 

Signed-off-by: Max Shevchenko <wctrl@...ton.me>
---
Max Shevchenko (3):
      dt-bindings: dma: mediatek,uart-dma: drop mediatek,dma-33bits property
      dmaengine: mediatek: mtk-uart-apdma: support more than 33 bits for DMA bitmask
      arm64: dts: mediatek: mt6795: drop mediatek,dma-33bits property

 .../devicetree/bindings/dma/mediatek,uart-dma.yaml | 11 ++---
 arch/arm64/boot/dts/mediatek/mt6795.dtsi           |  4 +-
 drivers/dma/mediatek/mtk-uart-apdma.c              | 47 ++++++++++++++++------
 3 files changed, 39 insertions(+), 23 deletions(-)
---
base-commit: f83ec76bf285bea5727f478a68b894f5543ca76e
change-id: 20250921-uart-apdma-9ae76e42f213

Best regards,
-- 
Max Shevchenko <wctrl@...ton.me>