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linux/drivers/dma/mediatek
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AngeloGioacchino Del Regno 6c3e9a6d22 dmaengine: mediatek: uart-apdma: Fix above 4G addressing TX/RX 
[ Upstream commit 58ab9d7b66 ]

The VFF_4G_SUPPORT register is named differently in datasheets,
and its name is "VFF_ADDR2"; was this named correctly from the
beginning it would've been clearer that there was a mistake in
the programming sequence.

This register is supposed to hold the high bits to support the
DMA addressing above 4G (so, more than 32 bits) and not a bit
to "enable" the support for VFF 4G.

Fix the name of this register, and also fix its usage by writing
the upper 32 bits of the dma_addr_t on it when the SoC supports
such feature.

Fixes: 9135408c3a ("dmaengine: mediatek: Add MediaTek UART APDMA support")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patch.msgid.link/20251113122229.23998-6-angelogioacchino.delregno@collabora.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-03-04 07:19:45 -05:00
..
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Makefile dmaengine updates for v5.3-rc1 2019-07-17 09:55:43 -07:00
mtk-cqdma.c dmaengine: mediatek: Fix a flag reuse error in mtk_cqdma_tx_status() 2025-09-09 18:50:25 +02:00
mtk-hsdma.c dmaengine: mediatek: mtk-hsdma: Fix a resource leak in the error handling path of the probe function 2020-12-29 10:07:59 +05:30
mtk-uart-apdma.c dmaengine: mediatek: uart-apdma: Fix above 4G addressing TX/RX 2026-03-04 07:19:45 -05:00