From 2f185905da8a617ea9177f34ec6ee7a73f83109a Mon Sep 17 00:00:00 2001
From: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Date: Mon, 27 Oct 2025 17:10:23 +0100
Subject: [PATCH] ARM: dts: imx28-amarula-rmm: add I2S audio

Add support for I2S audio on Amarula rmm board. Audio codec
TLV320AIC3X is connected as slave to SAIF0, which provides
bitclock, frame and MCLK.

Co-developed-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---
 .../boot/dts/nxp/mxs/imx28-amarula-rmm.dts    | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/arch/arm/boot/dts/nxp/mxs/imx28-amarula-rmm.dts b/arch/arm/boot/dts/nxp/mxs/imx28-amarula-rmm.dts
index af59211842fb2..ddb64f3d0471a 100644
--- a/arch/arm/boot/dts/nxp/mxs/imx28-amarula-rmm.dts
+++ b/arch/arm/boot/dts/nxp/mxs/imx28-amarula-rmm.dts
@@ -112,6 +112,29 @@
 		enable-active-high;
 		regulator-always-on;
 	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "imx28-mrmmi-tlv320aic3x-audio";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,bitclock-master = <&cpu_dai>;
+		simple-audio-card,frame-master = <&cpu_dai>;
+		simple-audio-card,widgets =
+			"Headphone", "Headphone Jack";
+		simple-audio-card,routing =
+			"Headphone Jack", "HPROUT",
+			"Headphone Jack", "HPRCOM";
+		simple-audio-card,mclk-fs = <512>;
+
+		cpu_dai: simple-audio-card,cpu {
+			sound-dai = <&saif0>;
+			clocks = <&saif0>;
+		};
+
+		codec_dai: simple-audio-card,codec {
+			sound-dai = <&tlv320aic3x>;
+		};
+	};
 };
 
 &auart0 {
@@ -154,6 +177,19 @@
 	pinctrl-0 = <&i2c0_pins_a>;
 	status = "okay";
 
+	tlv320aic3x: audio-codec@18 {
+		compatible = "ti,tlv320aic3x";
+		pinctrl-names = "default";
+		pinctrl-0 = <&tlv320aic3x_pins>;
+		reg = <0x18>;
+		reset-gpios = <&gpio2 4 GPIO_ACTIVE_LOW>;
+		#sound-dai-cells = <0>;
+		DVDD-supply = <&reg_1v8>;
+		IOVDD-supply = <&reg_3v3>;
+		AVDD-supply = <&reg_3v3>;
+		DRVDD-supply = <&reg_3v3>;
+	};
+
 	touchscreen: touchscreen@38 {
 		compatible = "edt,edt-ft5306";
 		reg = <0x38>;
@@ -246,6 +282,14 @@
 		fsl,voltage = <MXS_VOLTAGE_HIGH>;
 	};
 
+	tlv320aic3x_pins: tlv320aic3x-pins@0 {
+		reg = <0>;
+		fsl,pinmux-ids = <MX28_PAD_SSP0_DATA4__GPIO_2_4>;
+		fsl,drive-strength = <MXS_DRIVE_4mA>;
+		fsl,pull-up = <MXS_PULL_ENABLE>;
+		fsl,voltage = <MXS_VOLTAGE_HIGH>;
+	};
+
 	usb0_vbus_enable_pin: usb0-vbus-enable@0 {
 		reg = <0>;
 		fsl,pinmux-ids = <MX28_PAD_SSP0_DATA5__GPIO_2_5>;
@@ -269,6 +313,12 @@
 	status = "okay";
 };
 
+&saif0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&saif0_pins_a>;
+	status = "okay";
+};
+
 /* microSD */
 &ssp0 {
 	compatible = "fsl,imx28-mmc";
-- 
2.47.3