dmaengine: Add Peripheral DMA support for SpacemiT K3 SoC

Documentation/devicetree/bindings/dma/spacemit,k1-pdma.yaml

@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/spacemit,k1-pdma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SpacemiT K1 PDMA Controller
+
+maintainers:
+  - Guodong Xu <guodong@riscstar.com>
+
+allOf:
+  - $ref: dma-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - spacemit,k1-pdma
+      - spacemit,k3-pdma
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    description: Shared interrupt for all DMA channels
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  dma-channels:
+    maximum: 16
+
+  '#dma-cells':
+    const: 1
+    description:
+      The DMA request number for the peripheral device.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - resets
+  - dma-channels
+  - '#dma-cells'
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/spacemit,k1-syscon.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        dma-controller@d4000000 {
+            compatible = "spacemit,k1-pdma";
+            reg = <0x0 0xd4000000 0x0 0x4000>;
+            interrupts = <72>;
+            clocks = <&syscon_apmu CLK_DMA>;
+            resets = <&syscon_apmu RESET_DMA>;
+            dma-channels = <16>;
+            #dma-cells = <1>;
+        };
+    };

arch/riscv/boot/dts/spacemit/k3.dtsi

@@ -553,6 +553,18 @@
 			#reset-cells = <1>;
 		};
 
+		pdma: dma-controller@d4000000 {
+			compatible = "spacemit,k3-pdma";
+			reg = <0x0 0xd4000000 0x0 0x4000>;
+			clocks = <&syscon_apmu CLK_APMU_DMA>;
+			resets = <&syscon_apmu RESET_APMU_DMA>;
+			interrupt-parent = <&saplic>;
+			interrupts = <72 IRQ_TYPE_LEVEL_HIGH>;
+			dma-channels = <16>;
+			#dma-cells = <1>;
+			status = "disabled";
+		};
+
 		uart0: serial@d4017000 {
 			compatible = "spacemit,k1-uart",
 				     "intel,xscale-uart";
@@ -912,3 +924,4 @@
 		};
 	};
 };
+