arm64: dts: ti: Add k3-am654-gp.dtso for audio support

The GP application board have:
ICSSG I2C0..3 connected to I2C EEPROMs
ICSSG UART0..3 headers with level shifters
ICSSG SPI0..3 connected to SPI Flash
McASP0 conencted to tlv320aic3106 codec with Headset out and Line in jack

This patch adds support for the audio on the GP application board.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>

arch/arm64/boot/dts/ti/Makefile

@@ -8,7 +8,8 @@
 
 DTC_FLAGS += -@
 
-dtb-$(CONFIG_ARCH_K3_AM6_SOC) += k3-am654-base-board.dtb
+dtb-$(CONFIG_ARCH_K3_AM6_SOC) += k3-am654-base-board.dtb \
+	k3-am654-gp.dtbo
 
 dtb-$(CONFIG_ARCH_K3_AM6_SOC) += $(shell grep -s incbin $(srctree)/$(src)/*.its | grep dtb | cut -d "\"" -f 2)
 

arch/arm64/boot/dts/ti/k3-am654-gp.dtso

@@ -0,0 +1,133 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * DT overlay for GP application board on AM654 EVM
+ *
+ * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
+ */
+
+/dts-v1/;
+/plugin/;
+#include <dt-bindings/pinctrl/k3.h>
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+  fragment@101 {
+	target-path = "/";
+
+	__overlay__ {
+		gp_vcc_5v0: fixedregulator-gp_vcc_5v0 {
+			compatible = "regulator-fixed";
+			regulator-name = "gp_vcc_5v0";
+			regulator-min-microvolt = <5000000>;
+			regulator-max-microvolt = <5000000>;
+			regulator-always-on;
+			regulator-boot-on;
+		};
+
+		codec_vcc_3v3: fixedregulator-codec_vcc_3v3 {
+			/* LP5912-3.3DRVT */
+			compatible = "regulator-fixed";
+			regulator-name = "codec_vcc_3v3";
+			regulator-min-microvolt = <3300000>;
+			regulator-max-microvolt = <3300000>;
+			vin-supply = <&gp_vcc_5v0>;
+			regulator-always-on;
+			regulator-boot-on;
+		};
+
+		gp_vcc_1v8: fixedregulator-gp_vcc_1v8 {
+			compatible = "regulator-fixed";
+			regulator-name = "gp_vcc_1v8";
+			regulator-min-microvolt = <1800000>;
+			regulator-max-microvolt = <1800000>;
+			regulator-always-on;
+			regulator-boot-on;
+		};
+
+		sound {
+			compatible = "simple-audio-card";
+			simple-audio-card,name = "AM65x-GPEVM";
+			simple-audio-card,widgets =
+				"Headphone", "Headphone Jack",
+				"Line", "Line In";
+			simple-audio-card,routing =
+				"Headphone Jack",	"HPLOUT",
+				"Headphone Jack",	"HPROUT",
+				"LINE1L",		"Line In",
+				"LINE1R",		"Line In";
+			simple-audio-card,format = "dsp_b";
+			simple-audio-card,bitclock-master = <&sound_master>;
+			simple-audio-card,frame-master = <&sound_master>;
+			simple-audio-card,bitclock-inversion;
+
+			simple-audio-card,cpu {
+				sound-dai = <&mcasp0>;
+			};
+
+			sound_master: simple-audio-card,codec {
+				sound-dai = <&tlv320aic3106>;
+				system-clock-frequency = <12000000>;
+			};
+		};
+	};
+  };
+};
+
+&main_pmx0 {
+	mcasp0_pins: mcasp0_pins {
+		pinctrl-single,pins = <
+			AM65X_IOPAD(0x01f4, PIN_INPUT, 5) /* (V24) PRG0_PRU0_GPO0.MCASP0_ACLKX */
+			AM65X_IOPAD(0x01f8, PIN_INPUT, 5) /* (W25) PRG0_PRU0_GPO1.MCASP0_AFSX */
+			AM65X_IOPAD(0x0204, PIN_OUTPUT, 5) /* (Y24) PRG0_PRU0_GPO4.MCASP0_AXR0 */
+			AM65X_IOPAD(0x0208, PIN_INPUT, 5) /* (V28) PRG0_PRU0_GPO5.MCASP0_AXR1 */
+		>;
+	};
+
+	aic3106_pins: aic3106_pins {
+		pinctrl-single,pins = <
+			AM65X_IOPAD(0x011c, PIN_OUTPUT, 7) /* (AD19) PRG1_PRU0_GPO15.GPIO0_71 */
+		>;
+	};
+};
+
+&main_i2c0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	tlv320aic3106: tlv320aic3106@1b {
+		#sound-dai-cells = <0>;
+		compatible = "ti,tlv320aic3106";
+		reg = <0x1b>;
+		status = "okay";
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&aic3106_pins>;
+
+		gpio-reset = <&main_gpio0 71 GPIO_ACTIVE_LOW>; /* gpio0_71 */
+
+		/* Regulators */
+		AVDD-supply = <&codec_vcc_3v3>;
+		IOVDD-supply = <&gp_vcc_1v8>;
+		DRVDD-supply = <&codec_vcc_3v3>;
+		DVDD-supply = <&gp_vcc_1v8>;
+	};
+};
+
+&mcasp0 {
+	#sound-dai-cells = <0>;
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcasp0_pins>;
+
+	op-mode = <0>;          /* MCASP_IIS_MODE */
+	tdm-slots = <2>;
+	/* 16 serializers */
+	serial-dir = <  /* 0: INACTIVE, 1: TX, 2: RX */
+		1 2 0 0
+		0 0 0 0
+		0 0 0 0
+		0 0 0 0
+	>;
+	tx-num-evt = <32>;
+	rx-num-evt = <32>;
+};