dts: Add MAX32666 DMA nodes and bindings

Insert dma0 in MAX32666 devicetree and add devicetree bindings
for MAX32 DMA driver.

Signed-off-by: Mert Ekren <[email protected]>

Author: mertekren

dts/arm/adi/max32/max32666.dtsi

@@ -97,6 +97,26 @@
 			};
 		};
 
+		dma0: dma@40028000 {
+			compatible = "adi,max32-dma";
+			reg = <0x40028000 0x1000>;
+			clocks = <&gcr ADI_MAX32_CLOCK_BUS0 5>;
+			interrupts = <28 0>, <29 0>, <30 0>, <31 0>, <68 0>, <69 0>, <70 0>, <71 0>;
+			dma-channels = <8>;
+			status = "disabled";
+			#dma-cells = <2>;
+		};
+
+		dma1: dma@40035000 {
+			compatible = "adi,max32-dma";
+			reg = <0x40035000 0x1000>;
+			clocks = <&gcr ADI_MAX32_CLOCK_BUS1 21>;
+			interrupts = <72 0>, <73 0>, <74 0>, <75 0>, <76 0>, <77 0>, <78 0>, <79 0>;
+			dma-channels = <8>;
+			status = "disabled";
+			#dma-cells = <2>;
+		};
+
 		spi0: spi@400be000 {
 			compatible = "adi,max32-spi";
 			reg = <0x400be000 0x1000>;

include/zephyr/dt-bindings/dma/max32666_dma.h

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2023 Analog Devices, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_INCLUDE_DT_BINDINGS_DMA_MAX32666_DMA_H_
+#define ZEPHYR_INCLUDE_DT_BINDINGS_DMA_MAX32666_DMA_H_
+
+#define MAX32_DMA_SLOT_MEMTOMEM 0x00U
+#define MAX32_DMA_SLOT_SPI1_RX  0x01U
+#define MAX32_DMA_SLOT_SPI2_RX  0x02U
+#define MAX32_DMA_SLOT_UART0_RX 0x04U
+#define MAX32_DMA_SLOT_UART1_RX 0x05U
+#define MAX32_DMA_SLOT_I2C0_RX  0x07U
+#define MAX32_DMA_SLOT_I2C1_RX  0x08U
+#define MAX32_DMA_SLOT_ADC      0x09U
+#define MAX32_DMA_SLOT_I2C2_RX  0x0AU
+#define MAX32_DMA_SLOT_UART2_RX 0x0EU
+#define MAX32_DMA_SLOT_SPI0_RX  0x0FU
+#define MAX32_DMA_SLOT_SPI1_TX  0x21U
+#define MAX32_DMA_SLOT_SPI2_TX  0x21U
+#define MAX32_DMA_SLOT_UART0_TX 0x24U
+#define MAX32_DMA_SLOT_UART1_TX 0x25U
+#define MAX32_DMA_SLOT_I2C0_TX  0x27U
+#define MAX32_DMA_SLOT_I2C1_TX  0x28U
+#define MAX32_DMA_SLOT_I2C2_TX  0x2AU
+#define MAX32_DMA_SLOT_UART2_TX 0x2EU
+#define MAX32_DMA_SLOT_SPI0_TX  0x2FU
+
+#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_DMA_MAX32666_DMA_H_ */