Introduced I2S nodes and internal dac and adc nodes as well
The new header file provided in order to make DMA channel names
more readable.

Signed-off-by: Anton D. Stavinskii <redacted>
---
 arch/riscv/boot/dts/sophgo/cv180x-dmamux.h | 57 ++++++++++++++++++++++++++++++
 arch/riscv/boot/dts/sophgo/cv180x.dtsi     | 55 ++++++++++++++++++++++++++++
 2 files changed, 112 insertions(+)

diff --git a/arch/riscv/boot/dts/sophgo/cv180x-dmamux.h b/arch/riscv/boot/dts/sophgo/cv180x-dmamux.h
new file mode 100644
index 000000000000..6314bf6e9dc8
--- /dev/null
+++ b/arch/riscv/boot/dts/sophgo/cv180x-dmamux.h

@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
+/*
+ * Copyright (C) 2025 Inochi Amaoto <inochiama@gmail.com>
+ */
+
+#ifndef _SOPHGO_CV18XX_DMAMUX
+#define _SOPHGO_CV18XX_DMAMUX
+
+#define DMA_I2S0_RX		0
+#define DMA_I2S0_TX		1
+#define DMA_I2S1_RX		2
+#define DMA_I2S1_TX		3
+#define DMA_I2S2_RX		4
+#define DMA_I2S2_TX		5
+#define DMA_I2S3_RX		6
+#define DMA_I2S3_TX		7
+#define DMA_UART0_RX	8
+#define DMA_UART0_TX	9
+#define DMA_UART1_RX	10
+#define DMA_UART1_TX	11
+#define DMA_UART2_RX	12
+#define DMA_UART2_TX	13
+#define DMA_UART3_RX	14
+#define DMA_UART3_TX	15
+#define DMA_SPI0_RX		16
+#define DMA_SPI0_TX		17
+#define DMA_SPI1_RX		18
+#define DMA_SPI1_TX		19
+#define DMA_SPI2_RX		20
+#define DMA_SPI2_TX		21
+#define DMA_SPI3_RX		22
+#define DMA_SPI3_TX		23
+#define DMA_I2C0_RX		24
+#define DMA_I2C0_TX		25
+#define DMA_I2C1_RX		26
+#define DMA_I2C1_TX		27
+#define DMA_I2C2_RX		28
+#define DMA_I2C2_TX		29
+#define DMA_I2C3_RX		30
+#define DMA_I2C3_TX		31
+#define DMA_I2C4_RX		32
+#define DMA_I2C4_TX		33
+#define DMA_TDM0_RX		34
+#define DMA_TDM0_TX		35
+#define DMA_TDM1_RX		36
+#define DMA_AUDSRC		37
+#define DMA_SPI_NAND	38
+#define DMA_SPI_NOR		39
+#define DMA_UART4_RX	40
+#define DMA_UART4_TX	41
+#define DMA_SPI_NOR1	42
+
+#define DMA_CPU_A53		0
+#define DMA_CPU_C906_0	1
+#define DMA_CPU_C906_1	2
+
+#endif // _SOPHGO_CV18XX_DMAMUX

diff --git a/arch/riscv/boot/dts/sophgo/cv180x.dtsi b/arch/riscv/boot/dts/sophgo/cv180x.dtsi
index 06b0ce5a2db7..ebe5e8113939 100644
--- a/arch/riscv/boot/dts/sophgo/cv180x.dtsi
+++ b/arch/riscv/boot/dts/sophgo/cv180x.dtsi

@@ -8,6 +8,7 @@
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 #include "cv18xx-reset.h"
+#include "cv180x-dmamux.h"
 
 / {
 	#address-cells = <1>;

@@ -448,6 +449,60 @@ usb: usb@4340000 {
 			status = "disabled";
 		};
 
+		i2s0: i2s@4100000 {
+			compatible = "sophgo,cv1800b-i2s";
+			reg = <0x04100000 0x1000>;
+			clocks = <&clk CLK_APB_I2S0>, <&clk CLK_SDMA_AUD0>;
+			clock-names = "i2s", "mclk";
+			dmas = <&dmamux DMA_I2S0_RX 1>, <&dmamux DMA_I2S0_TX 1>;
+			dma-names = "rx", "tx";
+			status = "disabled";
+		};