linux-kernel - [PATCH 3/3] arm64: dts: ti: am625-sk: Add audio output support

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Message-ID: <20220421132224.8601-4-j-luthra@ti.com>
Date:   Thu, 21 Apr 2022 18:52:24 +0530
From:   Jai Luthra <j-luthra@...com>
To:     Peter Ujfalusi <peter.ujfalusi@...il.com>,
        Nishanth Menon <nm@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jayesh Choudhary <j-choudhary@...com>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, Jai Luthra <j-luthra@...com>
Subject: [PATCH 3/3] arm64: dts: ti: am625-sk: Add audio output support

Add nodes for audio codec and sound card, enable the audio serializer
(McASP1) under use and update pinmux. Disable all other McASP nodes.

Audio input is currently not working properly, so the RX port on McASP1
is disabled for now, until the issue is debugged.

The serializer is shared between HDMI and codec. By default codec is
used for output, but it can be toggled to HDMI using a FET switch
connected to the MCASP1_FET_SEL (J24) header on the board.

Signed-off-by: Jai Luthra <j-luthra@...com>
---
 arch/arm64/boot/dts/ti/k3-am625-sk.dts | 89 ++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am625-sk.dts b/arch/arm64/boot/dts/ti/k3-am625-sk.dts
index a0ea2cc66b31..414f27d4a9dd 100644
--- a/arch/arm64/boot/dts/ti/k3-am625-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am625-sk.dts
@@ -119,6 +119,46 @@
 			 <3300000 0x1>;
 	};
 
+	vcc_1v8: fixedregulator-vcc-1v8 {
+		/* output of TPS6282518DMQ */
+		compatible = "regulator-fixed";
+		regulator-name = "vcc_1v8";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		vin-supply = <&vcc_3v3_sys>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	tlv320_mclk: tlv320-mclk {
+		#clock-cells = <0>;
+		compatible = "fixed-clock";
+		clock-frequency = <12288000>;
+	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "AM62x-SKEVM";
+		simple-audio-card,widgets =
+			"Headphone", "Headphone Jack";
+		simple-audio-card,routing =
+			"Headphone Jack",	"HPLOUT",
+			"Headphone Jack",	"HPROUT";
+		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 = <&mcasp1>;
+		};
+
+		sound_master: simple-audio-card,codec {
+			sound-dai = <&tlv320aic3106>;
+			clocks = <&tlv320_mclk>;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -264,6 +304,15 @@
 			AM62X_IOPAD(0x01d4, PIN_INPUT, 7) /* (B15) UART0_RTSn.GPIO1_23 */
 		>;
 	};
+
+	main_mcasp1_pins_default: main-mcasp1-pins-default {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x0090, PIN_INPUT, 2) /* (M24) GPMC0_BE0N_CLE.MCASP1_ACLKX */
+			AM62X_IOPAD(0x0098, PIN_INPUT, 2) /* (U23) GPMC0_WAIT0.MCASP1_AFSX */
+			AM62X_IOPAD(0x008c, PIN_OUTPUT, 2) /* (L25) GPMC0_WEN.MCASP1_AXR0 */
+			AM62X_IOPAD(0x0084, PIN_INPUT, 2) /* (L23) GPMC0_ADVN_ALE.MCASP1_AXR2 */
+		>;
+	};
 };
 
 &wkup_uart0 {
@@ -350,6 +399,18 @@
 		pinctrl-names = "default";
 		pinctrl-0 = <&main_gpio1_ioexp_intr_pins_default>;
 	};
+
+	tlv320aic3106: tlv320aic3106@1b {
+		#sound-dai-cells = <0>;
+		compatible = "ti,tlv320aic3106";
+		reg = <0x1b>;
+
+		/* Regulators */
+		AVDD-supply = <&vcc_3v3_sys>;
+		IOVDD-supply = <&vcc_3v3_sys>;
+		DRVDD-supply = <&vcc_3v3_sys>;
+		DVDD-supply = <&vcc_1v8>;
+	};
 };
 
 &main_i2c2 {
@@ -410,6 +471,34 @@
 	};
 };
 
+&mcasp0 {
+	status = "disabled";
+};
+
+&mcasp1 {
+	status = "okay";
+	#sound-dai-cells = <0>;
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_mcasp1_pins_default>;
+
+	op-mode = <0>;          /* MCASP_IIS_MODE */
+	tdm-slots = <2>;
+
+	serial-dir = <  /* 0: INACTIVE, 1: TX, 2: RX */
+	       1 0 0 0
+	       0 0 0 0
+	       0 0 0 0
+	       0 0 0 0
+	>;
+	tx-num-evt = <32>;
+	rx-num-evt = <32>;
+};
+
+&mcasp2 {
+	status = "disabled";
+};
+
 &mailbox0_cluster0 {
 	mbox_m4_0: mbox-m4-0 {
 		ti,mbox-rx = <0 0 0>;
-- 
2.17.1