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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WARNING: multiple messages have this Message-ID (diff)
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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next prev parent reply other threads:[~2026-05-12 16:57 UTC|newest]
Thread overview: 12+ 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 ` 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 6:38 ` Inochi Amaoto
2026-05-11 16:01 ` Conor Dooley
2026-05-11 16:01 ` Conor Dooley
2026-05-11 22:04 ` Inochi Amaoto
2026-05-11 22:04 ` Inochi Amaoto
2026-05-12 16:57 ` Conor Dooley [this message]
2026-05-12 16:57 ` Conor Dooley
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
2026-05-11 6:38 ` Inochi Amaoto
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