boards: esp32: add i2s for non-gdma SoC boards

Adds i2s support for boards based on:
- esp32
- esp32s2

Signed-off-by: Marcio Ribeiro <marcio.ribeiro@espressif.com>

boards/espressif/esp32_devkitc_wroom/esp32_devkitc_wroom-pinctrl.dtsi

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd.
+ * Copyright (c) 2022-2025 Espressif Systems (Shanghai) Co., Ltd.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -74,5 +74,35 @@
 			output-high;
 		};
 	};
+
+	i2s0_default: i2s0_default {
+		group1 {
+			pinmux = <I2S0_O_WS_GPIO5>,
+				 <I2S0_O_BCK_GPIO6>,
+				 <I2S0_O_SD_GPIO7>,
+				 <I2S0_I_WS_GPIO15>,
+				 <I2S0_I_BCK_GPIO16>;
+			output-enable;
+		};
+		group2 {
+			pinmux = <I2S0_I_SD_GPIO17>;
+			input-enable;
+		};
+	};
+
+	i2s1_default: i2s1_default {
+		group1 {
+			pinmux = <I2S1_O_WS_GPIO8>,
+				 <I2S1_O_BCK_GPIO3>,
+				 <I2S1_O_SD_GPIO9>,
+				 <I2S1_I_WS_GPIO10>,
+				 <I2S1_I_BCK_GPIO11>;
+			output-enable;
+		};
+		group2 {
+			pinmux = <I2S1_I_SD_GPIO12>;
+			input-enable;
+		};
+	};
 };
 

boards/espressif/esp32_devkitc_wroom/esp32_devkitc_wroom_procpu.dts

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023 Espressif Systems (Shanghai) Co., Ltd.
+ * Copyright (c) 2023-2025 Espressif Systems (Shanghai) Co., Ltd.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -89,6 +89,18 @@
 	pinctrl-names = "default";
 };
 
+&i2s0 {
+	pinctrl-0 = <&i2s0_default>;
+	pinctrl-names = "default";
+	status = "disabled";
+};
+
+&i2s1 {
+	pinctrl-0 = <&i2s1_default>;
+	pinctrl-names = "default";
+	status = "disabled";
+};
+
 &spi2 {
 	#address-cells = <1>;
 	#size-cells = <0>;

boards/espressif/esp32_devkitc_wroom/esp32_devkitc_wroom_procpu.yaml

@@ -9,6 +9,7 @@ supported:
   - dac
   - gpio
   - i2c
+  - i2s
   - watchdog
   - uart
   - nvs

boards/espressif/esp32_devkitc_wrover/esp32_devkitc_wrover-pinctrl.dtsi

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd.
+ * Copyright (c) 2022-2025 Espressif Systems (Shanghai) Co., Ltd.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -74,4 +74,34 @@
 			output-high;
 		};
 	};
+
+	i2s0_default: i2s0_default {
+		group1 {
+			pinmux = <I2S0_O_WS_GPIO5>,
+				 <I2S0_O_BCK_GPIO6>,
+				 <I2S0_O_SD_GPIO7>,
+				 <I2S0_I_WS_GPIO15>,
+				 <I2S0_I_BCK_GPIO16>;
+			output-enable;
+		};
+		group2 {
+			pinmux = <I2S0_I_SD_GPIO17>;
+			input-enable;
+		};
+	};
+
+	i2s1_default: i2s1_default {
+		group1 {
+			pinmux = <I2S1_O_WS_GPIO8>,
+				 <I2S1_O_BCK_GPIO3>,
+				 <I2S1_O_SD_GPIO9>,
+				 <I2S1_I_WS_GPIO10>,
+				 <I2S1_I_BCK_GPIO11>;
+			output-enable;
+		};
+		group2 {
+			pinmux = <I2S1_I_SD_GPIO12>;
+			input-enable;
+		};
+	};
 };

boards/espressif/esp32_devkitc_wrover/esp32_devkitc_wrover_procpu.dts

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023 Espressif Systems (Shanghai) Co., Ltd.
+ * Copyright (c) 2023-2025 Espressif Systems (Shanghai) Co., Ltd.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -89,6 +89,18 @@
 	pinctrl-names = "default";
 };
 
+&i2s0 {
+	pinctrl-0 = <&i2s0_default>;
+	pinctrl-names = "default";
+	status = "disabled";
+};
+
+&i2s1 {
+	pinctrl-0 = <&i2s1_default>;
+	pinctrl-names = "default";
+	status = "disabled";
+};
+
 &spi2 {
 	#address-cells = <1>;
 	#size-cells = <0>;

boards/espressif/esp32_devkitc_wrover/esp32_devkitc_wrover_procpu.yaml

@@ -9,6 +9,7 @@ supported:
   - dac
   - gpio
   - i2c
+  - i2s
   - watchdog
   - uart
   - nvs

boards/espressif/esp32_ethernet_kit/esp32_ethernet_kit-pinctrl.dtsi

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Grant Ramsay <grant.ramsay@hotmail.com>
+ * Copyright (c) 2022-2025 Grant Ramsay <grant.ramsay@hotmail.com>
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -40,4 +40,33 @@
 		};
 	};
 
+	i2s0_default: i2s0_default {
+		group1 {
+			pinmux = <I2S0_O_WS_GPIO5>,
+				 <I2S0_O_BCK_GPIO6>,
+				 <I2S0_O_SD_GPIO7>,
+				 <I2S0_I_WS_GPIO15>,
+				 <I2S0_I_BCK_GPIO16>;
+			output-enable;
+		};
+		group2 {
+			pinmux = <I2S0_I_SD_GPIO17>;
+			input-enable;
+		};
+	};
+
+	i2s1_default: i2s1_default {
+		group1 {
+			pinmux = <I2S1_O_WS_GPIO8>,
+				 <I2S1_O_BCK_GPIO3>,
+				 <I2S1_O_SD_GPIO9>,
+				 <I2S1_I_WS_GPIO10>,
+				 <I2S1_I_BCK_GPIO11>;
+			output-enable;
+		};
+		group2 {
+			pinmux = <I2S1_I_SD_GPIO12>;
+			input-enable;
+		};
+	};
 };

boards/espressif/esp32_ethernet_kit/esp32_ethernet_kit_procpu.dts

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Grant Ramsay <grant.ramsay@hotmail.com>
+ * Copyright (c) 2022-2025 Grant Ramsay <grant.ramsay@hotmail.com>
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -43,6 +43,18 @@
 	status = "okay";
 };
 
+&i2s0 {
+	pinctrl-0 = <&i2s0_default>;
+	pinctrl-names = "default";
+	status = "disabled";
+};
+
+&i2s1 {
+	pinctrl-0 = <&i2s1_default>;
+	pinctrl-names = "default";
+	status = "disabled";
+};
+
 &spi2 {
 	#address-cells = <1>;
 	#size-cells = <0>;

boards/espressif/esp32_ethernet_kit/esp32_ethernet_kit_procpu.yaml

@@ -10,4 +10,5 @@ supported:
   - uart
   - nvs
   - pwm
+  - i2s
 vendor: espressif

boards/espressif/esp32s2_devkitc/esp32s2_devkitc-pinctrl.dtsi

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024 Espressif Systems (Shanghai) Co., Ltd.
+ * Copyright (c) 2024-2025 Espressif Systems (Shanghai) Co., Ltd.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -65,4 +65,19 @@
 		};
 	};
 
+	i2s0_default: i2s0_default {
+		group1 {
+			pinmux = <I2S0_MCLK_GPIO4>,
+				 <I2S0_O_WS_GPIO5>,
+				 <I2S0_O_BCK_GPIO6>,
+				 <I2S0_O_SD_GPIO7>,
+				 <I2S0_I_WS_GPIO15>,
+				 <I2S0_I_BCK_GPIO16>;
+			output-enable;
+		};
+		group2 {
+			pinmux = <I2S0_I_SD_GPIO17>;
+			input-enable;
+		};
+	};
 };

boards/espressif/esp32s2_devkitc/esp32s2_devkitc.dts

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024 Espressif Systems (Shanghai) Co., Ltd.
+ * Copyright (c) 2024-2025 Espressif Systems (Shanghai) Co., Ltd.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -96,6 +96,12 @@
 	pinctrl-names = "default";
 };
 
+&i2s0 {
+	pinctrl-0 = <&i2s0_default>;
+	pinctrl-names = "default";
+	status = "disabled";
+};
+
 &trng0 {
 	status = "okay";
 };

boards/espressif/esp32s2_devkitc/esp32s2_devkitc.yaml

@@ -9,6 +9,7 @@ supported:
   - dac
   - gpio
   - i2c
+  - i2s
   - watchdog
   - uart
   - nvs

boards/espressif/esp32s2_saola/esp32s2_saola-pinctrl.dtsi

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd.
+ * Copyright (c) 2022-2025 Espressif Systems (Shanghai) Co., Ltd.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -65,4 +65,19 @@
 		};
 	};
 
+	i2s0_default: i2s0_default {
+		group1 {
+			pinmux = <I2S0_MCLK_GPIO4>,
+				 <I2S0_O_WS_GPIO5>,
+				 <I2S0_O_BCK_GPIO6>,
+				 <I2S0_O_SD_GPIO7>,
+				 <I2S0_I_WS_GPIO15>,
+				 <I2S0_I_BCK_GPIO16>;
+			output-enable;
+		};
+		group2 {
+			pinmux = <I2S0_I_SD_GPIO17>;
+			input-enable;
+		};
+	};
 };

boards/espressif/esp32s2_saola/esp32s2_saola.dts

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Espressif Systems (Shanghai) Co., Ltd.
+ * Copyright (c) 2021-2025 Espressif Systems (Shanghai) Co., Ltd.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -96,6 +96,12 @@
 	pinctrl-names = "default";
 };
 
+&i2s0 {
+	pinctrl-0 = <&i2s0_default>;
+	pinctrl-names = "default";
+	status = "disabled";
+};
+
 &trng0 {
 	status = "okay";
 };

boards/espressif/esp32s2_saola/esp32s2_saola.yaml

@@ -9,6 +9,7 @@ supported:
   - dac
   - gpio
   - i2c
+  - i2s
   - watchdog
   - uart
   - nvs