linux-kernel - Re: [PATCH v2 3/3] riscv: dts: sophgo: cv180x: Allow the DMA multiplexer to set channel number for DMA controller

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Message-ID: <aWrYSw94WjqPrUkK@inochi.infowork>
Date: Sat, 17 Jan 2026 08:32:02 +0800
From: Inochi Amaoto <inochiama@...il.com>
To: Frank Li <Frank.li@....com>, Inochi Amaoto <inochiama@...il.com>
Cc: Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>, 
	Vinod Koul <vkoul@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Paul Walmsley <pjw@...nel.org>, Palmer Dabbelt <palmer@...belt.com>, 
	Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>, 
	Chen Wang <unicorn_wang@...look.com>, Alexander Sverdlin <alexander.sverdlin@...il.com>, 
	Longbin Li <looong.bin@...il.com>, Ze Huang <huangze@...t.edu.cn>, 
	"Anton D . Stavinskii" <stavinsky@...il.com>, dmaengine@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org, sophgo@...ts.linux.dev, 
	Yixun Lan <dlan@...too.org>
Subject: Re: [PATCH v2 3/3] riscv: dts: sophgo: cv180x: Allow the DMA
 multiplexer to set channel number for DMA controller

On Fri, Jan 16, 2026 at 10:42:54AM -0500, Frank Li wrote:
> On Mon, Dec 15, 2025 at 06:46:00AM +0800, Inochi Amaoto wrote:
> > Change the DMA controller compatible to the sophgo,cv1800b-axi-dma,
> > which supports setting DMA channel number in DMA phandle args.
> 
> 
> Does it need update DMA comsumer?
> 
> Frank


Not needed, this is handle by the dmamux driver, it is allocate and
configure the DMA channel dynamicly.

Regards,
Inochi

> >
> > Fixes: 514951a81a5e ("riscv: dts: sophgo: cv18xx: add DMA controller")
> > Reported-by: Anton D. Stavinskii <stavinsky@...il.com>
> > Closes: https://github.com/sophgo/linux/issues/9
> > Signed-off-by: Inochi Amaoto <inochiama@...il.com>
> > ---
> >  arch/riscv/boot/dts/sophgo/cv180x.dtsi | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/arch/riscv/boot/dts/sophgo/cv180x.dtsi b/arch/riscv/boot/dts/sophgo/cv180x.dtsi
> > index 1b2b1969a648..e1b515b46466 100644
> > --- a/arch/riscv/boot/dts/sophgo/cv180x.dtsi
> > +++ b/arch/riscv/boot/dts/sophgo/cv180x.dtsi
> > @@ -417,7 +417,7 @@ sdhci1: mmc@...0000 {
> >  		};
> >
> >  		dmac: dma-controller@...0000 {
> > -			compatible = "snps,axi-dma-1.01a";
> > +			compatible = "sophgo,cv1800b-axi-dma";
> >  			reg = <0x04330000 0x1000>;
> >  			interrupts = <SOC_PERIPHERAL_IRQ(13) IRQ_TYPE_LEVEL_HIGH>;
> >  			clocks = <&clk CLK_SDMA_AXI>, <&clk CLK_SDMA_AXI>;
> > --
> > 2.52.0
> >