[PATCH v6 5/5] arm64: dts: imx8mp: Add analog audio output on i.MX8MP EVK

[Marek Vasut]

Enable SAI3 on i.MX8MP EVK, add WM8960 codec binding and regulator.
This is all that is needed to get analog audio output operational
on i.MX8MP EVK.

Reviewed-by: Fabio Estevam <festevam at gmail.com>
Signed-off-by: Marek Vasut <marex at denx.de>
---
Cc: Abel Vesa <abelvesa at kernel.org>
Cc: Alexander Stein <alexander.stein at ew.tq-group.com>
Cc: Fabio Estevam <festevam at gmail.com>
Cc: Jacky Bai <ping.bai at nxp.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt at linaro.org>
Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Cc: Luca Ceresoli <luca.ceresoli at bootlin.com>
Cc: Lucas Stach <l.stach at pengutronix.de>
Cc: Marco Felsch <m.felsch at pengutronix.de>
Cc: Michael Turquette <mturquette at baylibre.com>
Cc: NXP Linux Team <linux-imx at nxp.com>
Cc: Peng Fan <peng.fan at nxp.com>
Cc: Pengutronix Kernel Team <kernel at pengutronix.de>
Cc: Richard Cochran <richardcochran at gmail.com>
Cc: Rob Herring <robh+dt at kernel.org>
Cc: Sascha Hauer <s.hauer at pengutronix.de>
Cc: Shawn Guo <shawnguo at kernel.org>
Cc: Stephen Boyd <sboyd at kernel.org>
Cc: devicetree at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-clk at vger.kernel.org
---
V2: No change
V3: No change
V4: - Update codec node name and phandle label
    - Use just sound for the sound node name
    - Rebase on next 20230223
V5: - Drop regulator-always-on from codec regulator
    - Add RB from Fabio
    - TB by Alexander added and removed again, since the patch was reworked
    - Switch to simple-audio-card
    - Add sound-dai-cells to codec node
V6: - Split off separate pinctrl for regulator
    - Drop unused SAI3_RXFS pinmux
---
 arch/arm64/boot/dts/freescale/imx8mp-evk.dts | 80 ++++++++++++++++++++
 1 file changed, 80 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
index 7816853162b3f..fa37ce89f8d3d 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
@@ -40,6 +40,17 @@ pcie0_refclk: pcie0-refclk {
 		clock-frequency = <100000000>;
 	};
 
+	reg_audio_pwr: regulator-audio-pwr {
+		compatible = "regulator-fixed";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_audio_pwr_reg>;
+		regulator-name = "audio-pwr";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&gpio4 29 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
 	reg_can1_stby: regulator-can1-stby {
 		compatible = "regulator-fixed";
 		regulator-name = "can1-stby";
@@ -83,6 +94,37 @@ reg_usdhc2_vmmc: regulator-usdhc2 {
 		gpio = <&gpio2 19 GPIO_ACTIVE_HIGH>;
 		enable-active-high;
 	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "wm8960-audio";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,frame-master = <&cpudai>;
+		simple-audio-card,bitclock-master = <&cpudai>;
+		simple-audio-card,widgets =
+			"Headphone", "Headphone Jack",
+			"Speaker", "External Speaker",
+			"Microphone", "Mic Jack";
+		simple-audio-card,routing =
+			"Headphone Jack", "HP_L",
+			"Headphone Jack", "HP_R",
+			"External Speaker", "SPK_LP",
+			"External Speaker", "SPK_LN",
+			"External Speaker", "SPK_RP",
+			"External Speaker", "SPK_RN",
+			"LINPUT1", "Mic Jack",
+			"LINPUT3", "Mic Jack",
+			"Mic Jack", "MICB";
+
+		cpudai: simple-audio-card,cpu {
+			sound-dai = <&sai3>;
+		};
+
+		simple-audio-card,codec {
+			sound-dai = <&wm8960>;
+		};
+
+	};
 };
 
 &flexspi {
@@ -344,6 +386,18 @@ &i2c3 {
 	pinctrl-0 = <&pinctrl_i2c3>;
 	status = "okay";
 
+	wm8960: codec at 1a {
+		compatible = "wlf,wm8960";
+		reg = <0x1a>;
+		#sound-dai-cells = <0>;
+		clocks = <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_SAI3_MCLK1>;
+		clock-names = "mclk";
+		wlf,shared-lrclk;
+		wlf,hp-cfg = <3 2 3>;
+		wlf,gpio-cfg = <1 3>;
+		SPKVDD1-supply = <&reg_audio_pwr>;
+	};
+
 	pca6416: gpio at 20 {
 		compatible = "ti,tca6416";
 		reg = <0x20>;
@@ -422,6 +476,16 @@ &pwm4 {
 	status = "okay";
 };
 
+&sai3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_sai3>;
+	assigned-clocks = <&clk IMX8MP_CLK_SAI3>;
+	assigned-clock-parents = <&clk IMX8MP_AUDIO_PLL1_OUT>;
+	assigned-clock-rates = <12288000>;
+	fsl,sai-mclk-direction-output;
+	status = "okay";
+};
+
 &snvs_pwrkey {
 	status = "okay";
 };
@@ -499,6 +563,12 @@ &wdog1 {
 };
 
 &iomuxc {
+	pinctrl_audio_pwr_reg: audiopwrreggrp {
+		fsl,pins = <
+			MX8MP_IOMUXC_SAI3_RXC__GPIO4_IO29		0xd6
+		>;
+	};
+
 	pinctrl_eqos: eqosgrp {
 		fsl,pins = <
 			MX8MP_IOMUXC_ENET_MDC__ENET_QOS_MDC				0x2
@@ -668,6 +738,16 @@ MX8MP_IOMUXC_UART3_TXD__UART1_DCE_RTS	0x140
 		>;
 	};
 
+	pinctrl_sai3: sai3grp {
+		fsl,pins = <
+			MX8MP_IOMUXC_SAI3_TXFS__AUDIOMIX_SAI3_TX_SYNC	0xd6
+			MX8MP_IOMUXC_SAI3_TXC__AUDIOMIX_SAI3_TX_BCLK	0xd6
+			MX8MP_IOMUXC_SAI3_RXD__AUDIOMIX_SAI3_RX_DATA00	0xd6
+			MX8MP_IOMUXC_SAI3_TXD__AUDIOMIX_SAI3_TX_DATA00	0xd6
+			MX8MP_IOMUXC_SAI3_MCLK__AUDIOMIX_SAI3_MCLK	0xd6
+		>;
+	};
+
 	pinctrl_uart2: uart2grp {
 		fsl,pins = <
 			MX8MP_IOMUXC_UART2_RXD__UART2_DCE_RX	0x140
-- 
2.39.2