Re: [PATCH v2 0/3] riscv: sophgo: allow DMA multiplexer set channel number for DMA controller

Inochi Amaoto
2026-01-15T23:28:58Z

On Mon, Dec 15, 2025 at 06:45:57AM +0800, Inochi Amaoto wrote:
> As the DMA controller on Sophgo CV1800 series SoC only has 8 channels,
> the SoC provides a dma multiplexer to reuse the DMA channel. However,
> the dma multiplexer also controlls the DMA interrupt multiplexer, which
> means that the dma multiplexer needs to know the channel number.
>
> Change the DMA phandle args parsing logic so it can use handshake
> number as channel number if necessary.
>
> Change from v1:
> 1. rebase to v6.19-rc1
> 2. patch 1: remove a comment placed in wrong place.
> 3. patch 2: fix typo in comments.
> 4. patch 2: initialize chan as NULL in dw_axi_dma_of_xlate.
>
> Inochi Amaoto (3):
> dt-bindings: dma: snps,dw-axi-dmac: Add CV1800B compatible
> dmaengine: dw-axi-dmac: Add support for CV1800B DMA
> riscv: dts: sophgo: cv180x: Allow the DMA multiplexer to set channel
> number for DMA controller
>
> .../bindings/dma/snps,dw-axi-dmac.yaml | 1 +
> arch/riscv/boot/dts/sophgo/cv180x.dtsi | 2 +-
> .../dma/dw-axi-dmac/dw-axi-dmac-platform.c | 26 ++++++++++++++++---
> drivers/dma/dw-axi-dmac/dw-axi-dmac.h | 1 +
> 4 files changed, 25 insertions(+), 5 deletions(-)
>
> --
> 2.52.0
>

Hi, Vinod

Would you have any suggestion on this patch? Or this is OK to merge?

Regards,
Inochi