[PATCH] arm64: dts: ti: k3-am654: Add overlay for audio support

[Jayesh Choudhary]

From: Peter Ujfalusi <peter.ujfalusi@xxxxxx>

The GP application board has:
ICSSG I2C0..3 connected to I2C EEPROMs
ICSSG UART0..3 headers with level shifters
ICSSG SPI0..3 connected to SPI Flash
McASP0 connected 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@xxxxxx>
[j-choudhary@xxxxxx: Makefile fixups, dtso file cleanups]
Signed-off-by: Jayesh Choudhary <j-choudhary@xxxxxx>
---

Changes are made considering Andrew's comment on another overlay patch[1]
related to Makefile and styling comments on the overlay file.

[1]:
<https://lore.kernel.org/all/8e6442c8-e4ef-705d-1378-7d1f8b74e84d@xxxxxx/>

 arch/arm64/boot/dts/ti/Makefile         |   3 +-
 arch/arm64/boot/dts/ti/k3-am654-gp.dtso | 124 ++++++++++++++++++++++++
 2 files changed, 126 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm64/boot/dts/ti/k3-am654-gp.dtso

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 541970a8ed0a..9b70a85fbc96 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -21,12 +21,13 @@ dtb-$(CONFIG_ARCH_K3) += k3-am642-phyboard-electra-rdk.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am642-sk.dtb
 
 # Boards with AM65x SoC
+k3-am654-evm-dtbs := k3-am654-base-board.dtb k3-am654-gp.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am6528-iot2050-basic.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am6528-iot2050-basic-pg2.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am6548-iot2050-advanced.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am6548-iot2050-advanced-m2.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am6548-iot2050-advanced-pg2.dtb
-dtb-$(CONFIG_ARCH_K3) += k3-am654-base-board.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am654-evm.dtb
 
 # Boards with J7200 SoC
 k3-j7200-evm-dtbs := k3-j7200-common-proc-board.dtb k3-j7200-evm-quad-port-eth-exp.dtbo
diff --git a/arch/arm64/boot/dts/ti/k3-am654-gp.dtso b/arch/arm64/boot/dts/ti/k3-am654-gp.dtso
new file mode 100644
index 000000000000..14ceb2714677
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am654-gp.dtso
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * DT overlay for GP application board on AM654 EVM
+ *
+ * Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+
+#include "k3-pinctrl.h"
+
+&{/} {
+	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>;
+		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 {
+	status = "okay";
+	#sound-dai-cells = <0>;
+	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>;
+};
-- 
2.25.1