linux-kernel - [PATCH v2 6/8] riscv: dts: spacemit: Add PDMA0 node for K1 SoC

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Message-Id: <20250701-working_dma_0701_v2-v2-6-ab6ee9171d26@riscstar.com>
Date: Tue, 01 Jul 2025 13:37:00 +0800
From: Guodong Xu <guodong@...cstar.com>
To: 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>, 
 Duje Mihanović <duje.mihanovic@...le.hr>, 
 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>
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, Guodong Xu <guodong@...cstar.com>
Subject: [PATCH v2 6/8] riscv: dts: spacemit: Add PDMA0 node for K1 SoC

Add PDMA0 dma-controller node under dma_bus for SpacemiT K1 SoC.

The PDMA0 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>
---
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 8f44c1458123be9e74a80878517b2b785d743bef..69e0b1edf3276df26c07c15d81607f83de0e5d57 100644
--- a/arch/riscv/boot/dts/spacemit/k1.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1.dtsi
@@ -591,6 +591,17 @@ uart9: serial@...17800 {
 				status = "disabled";
 			};
 
+			pdma0: dma-controller@...00000 {
+				compatible = "spacemit,k1-pdma";
+				reg = <0x0 0xd4000000 0x0 0x4000>;
+				interrupts = <72>;
+				clocks = <&syscon_apmu CLK_DMA>;
+				resets = <&syscon_apmu RESET_DMA>;
+				#dma-cells= <2>;
+				#dma-channels = <16>;
+				status = "disabled";
+			};
+
 			sec_uart1: serial@...12000 {
 				compatible = "spacemit,k1-uart",
 					     "intel,xscale-uart";

-- 
2.43.0