linux-kernel - Re: [PATCH v4 6/8] riscv: dts: spacemit: Add PDMA node for K1 SoC

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Message-ID: <34485B93B03EAD10+aJ7NVbe8aqjWBFd-@LT-Guozexi>
Date: Fri, 15 Aug 2025 14:01:57 +0800
From: Troy Mitchell <troy.mitchell@...ux.spacemit.com>
To: Guodong Xu <guodong@...cstar.com>, Vinod Koul <vkoul@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Yixun Lan <dlan@...too.org>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>,
	duje@...emihanovic.xyz
Cc: Alex Elder <elder@...cstar.com>, Vivian Wang <wangruikang@...as.ac.cn>,
	dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
	spacemit@...ts.linux.dev,
	Troy Mitchell <troy.mitchell@...ux.spacemit.com>
Subject: Re: [PATCH v4 6/8] riscv: dts: spacemit: Add PDMA node for K1 SoC

Thanks.

Reviewed-by: Troy Mitchell <troy.mitchell@...ux.spacemit.com>

On Fri, Aug 15, 2025 at 01:16:28PM +0800, Guodong Xu wrote:
> Add PDMA dma-controller node under dma_bus for SpacemiT K1 SoC.
> 
> The PDMA node is marked as disabled by default, allowing board-specific
> device trees to enable it as needed.
> 
> Signed-off-by: Guodong Xu <guodong@...cstar.com>
> ---
> v4:
> - rename the node from pdma0 to pdma
> - for consistnecy, put the "interrupts" after "clocks" and "resets"
> v3:
> - adjust pdma0 position, ordering by device address
> - update properties according to the newly created schema binding
> v2:
> - Updated the compatible string.
> - Rebased. Part of the changes in v1 is now in this patchset:
>    - "riscv: dts: spacemit: Add DMA translation buses for K1"
>    - Link: https://lore.kernel.org/all/20250623-k1-dma-buses-rfc-wip-v1-0-c0144082061f@iscas.ac.cn/
> ---
>  arch/riscv/boot/dts/spacemit/k1.dtsi | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spacemit/k1.dtsi
> index abde8bb07c95c5a745736a2dd6f0c0e0d7c696e4..861f0fe18083fa158da51bd3be2808609f6233f4 100644
> --- a/arch/riscv/boot/dts/spacemit/k1.dtsi
> +++ b/arch/riscv/boot/dts/spacemit/k1.dtsi
> @@ -660,6 +660,17 @@ dma-bus {
>  			dma-ranges = <0x0 0x00000000 0x0 0x00000000 0x0 0x80000000>,
>  				     <0x1 0x00000000 0x1 0x80000000 0x3 0x00000000>;
>  
> +			pdma: dma-controller@...00000 {
> +				compatible = "spacemit,k1-pdma";
> +				reg = <0x0 0xd4000000 0x0 0x4000>;
> +				clocks = <&syscon_apmu CLK_DMA>;
> +				resets = <&syscon_apmu RESET_DMA>;
> +				interrupts = <72>;
> +				dma-channels = <16>;
> +				#dma-cells= <1>;
> +				status = "disabled";
> +			};
> +
>  			uart0: serial@...17000 {
>  				compatible = "spacemit,k1-uart",
>  					     "intel,xscale-uart";
> 
> -- 
> 2.43.0
> 
>