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From: David Yang <mmyangfl@gmail.com>
To: dmaengine@vger.kernel.org
Cc: David Yang <mmyangfl@gmail.com>, Vinod Koul <vkoul@kernel.org>,
	Frank Li <Frank.Li@kernel.org>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 0/2] dmaengine: pl08x: Support the Hi3798MV100 PL080 variant
Date: Fri,  6 Nov 2026 15:25:57 +0800	[thread overview]
Message-ID: <20261106072602.77560-1-mmyangfl@gmail.com> (raw)

Hi3798MV100 (HiSilicon HiSTB) carries a PL080-class DMAC. The block
reports 0x0a141080 -- the ID reserved for Samsung's PL080S -- while its
register map is plain PL080 and the instance has 4 channels instead of
the 8 the plain PL080 entry claims.

Set the DT node to arm,primecell-periphid = <0x00041080> and
dma-channels = <4>, and apply the two patches to add that support.

Tested on Hi3798MV100 hardware.

v2:
 - fix for shared reset
 - use local copy of vendor_data
v1: https://lore.kernel.org/r/20261104154542.3131916-1-mmyangfl@gmail.com/

David Yang (2):
  dmaengine: pl08x: Release the reset before reading registers
  dmaengine: pl08x: Use the channel count from the device tree

 drivers/dma/amba-pl08x.c | 34 ++++++++++++++++++++++++++++++++--
 1 file changed, 32 insertions(+), 2 deletions(-)

-- 
2.53.0


             reply	other threads:[~2026-11-06  7:26 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-11-06  7:25 David Yang [this message]
2026-11-06  7:25 ` [PATCH v2 1/2] dmaengine: pl08x: Release the reset before reading registers David Yang
2026-11-06 12:32   ` Philipp Zabel
2026-11-06  7:25 ` [PATCH v2 2/2] dmaengine: pl08x: Use the channel count from the device tree David Yang

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