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From: Conor Dooley <conor@kernel.org>
To: Inochi Amaoto <inochiama@gmail.com>
Cc: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>,
	Vinod Koul <vkoul@kernel.org>, Frank Li <Frank.Li@kernel.org>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Chen Wang <unicorn_wang@outlook.com>,
	Paul Walmsley <pjw@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Alexandre Ghiti <alex@ghiti.fr>,
	Alexander Sverdlin <alexander.sverdlin@gmail.com>,
	Longbin Li <looong.bin@gmail.com>, Yixun Lan <dlan@kernel.org>,
	"Anton D. Stavinskii" <stavinsky@gmail.com>,
	dmaengine@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, sophgo@lists.linux.dev,
	linux-riscv@lists.infradead.org, Yixun Lan <dlan@gentoo.org>
Subject: Re: [PATCH v6 1/2] dt-bindings: dma: snps,dw-axi-dmac: Add fallback compatible for CV1800B
Date: Tue, 12 May 2026 17:57:22 +0100	[thread overview]
Message-ID: <20260512-shudder-repressed-204473e32978@spud> (raw)
In-Reply-To: <agJSPkA88GcTYS86@inochi.infowork>


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On Tue, May 12, 2026 at 06:04:36AM +0800, Inochi Amaoto wrote:
> On Mon, May 11, 2026 at 05:01:01PM +0100, Conor Dooley wrote:
> > On Mon, May 11, 2026 at 02:38:16PM +0800, Inochi Amaoto wrote:
> > > The previous version of the binding change only add compatible
> > > string without adding the fallback compatible, this breaks
> > > backward compatibility. Add the needed fallback compatible to
> > > fix this.
> > 
> > I don't understand how adding a specific comaptible affected backwards
> > compatibility. Did the dts originally use the snps compatible before the
> > device specific one was added?
> > 
> 
> Yes, the device is already in DTS, and since I find an quirk for
> it. A new compatible with fallback is necessary.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
pw-bot: not-applicable

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  reply	other threads:[~2026-05-12 16:57 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-11  6:38 [PATCH v6 0/2] riscv: sophgo: allow DMA multiplexer set channel number for DMA controller Inochi Amaoto
2026-05-11  6:38 ` [PATCH v6 1/2] dt-bindings: dma: snps,dw-axi-dmac: Add fallback compatible for CV1800B Inochi Amaoto
2026-05-11 16:01   ` Conor Dooley
2026-05-11 22:04     ` Inochi Amaoto
2026-05-12 16:57       ` Conor Dooley [this message]
2026-05-11  6:38 ` [PATCH v6 2/2] riscv: dts: sophgo: cv180x: Allow the DMA multiplexer to set channel number for DMA controller Inochi Amaoto

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