linux-kernel - [PATCH v6 4/4] arm64: dts: imx8mq-evk: Enable audio codec wm8952

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Date:   Fri, 8 Mar 2019 12:02:28 +0000
From:   Daniel Baluta <daniel.baluta@....com>
To:     "shawnguo@...nel.org" <shawnguo@...nel.org>
CC:     "S.j. Wang" <shengjiu.wang@....com>,
        "angus@...ea.ca" <angus@...ea.ca>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        "l.stach@...gutronix.de" <l.stach@...gutronix.de>,
        Abel Vesa <abel.vesa@....com>,
        "ccaione@...libre.com" <ccaione@...libre.com>,
        "baruch@...s.co.il" <baruch@...s.co.il>,
        "agx@...xcpu.org" <agx@...xcpu.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>,
        Aisheng Dong <aisheng.dong@....com>,
        "kuninori.morimoto.gx@...esas.com" <kuninori.morimoto.gx@...esas.com>,
        "spencercw@...il.com" <spencercw@...il.com>,
        Daniel Baluta <daniel.baluta@....com>
Subject: [PATCH v6 4/4] arm64: dts: imx8mq-evk: Enable audio codec wm8952

The main Audio DAC used on the EVK board is wm8952.
The EVK provides the MCLK to wm8952.

Digital interface is SAI2 which includes three signals:
SYNC_CLK, BCLK and DACDAT.

This patch sets:
	* SAI2 pinctrl configuration
	* clock hierarchy
	* wm8960 codec

Then uses simple-card machine driver to connect them
into a sound card.

Signed-off-by: Daniel Baluta <daniel.baluta@....com>
---
 arch/arm64/boot/dts/freescale/imx8mq-evk.dts | 46 ++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
index 54737bf1772f..09000ee34757 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
@@ -31,6 +31,33 @@
 		gpio = <&gpio2 19 GPIO_ACTIVE_HIGH>;
 		enable-active-high;
 	};
+
+	wm8524: audio-codec {
+		#sound-dai-cells = <0>;
+		compatible = "wlf,wm8524";
+		wlf,mute-gpios = <&gpio1 8 GPIO_ACTIVE_LOW>;
+	};
+
+	sound-wm8524 {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "wm8524-audio";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,frame-master = <&cpudai>;
+		simple-audio-card,bitclock-master = <&cpudai>;
+		simple-audio-card,widgets =
+			"Line", "Left Line Out Jack",
+			"Line", "Right Line Out Jack";
+		simple-audio-card,routing =
+			"Left Line Out Jack", "LINEVOUTL",
+			"Right Line Out Jack", "LINEVOUTR";
+		cpudai: simple-audio-card,cpu {
+			sound-dai = <&sai2>;
+		};
+		link_codec: simple-audio-card,codec {
+			sound-dai = <&wm8524>;
+			clocks = <&clk IMX8MQ_CLK_SAI2_ROOT>;
+		};
+	};
 };
 
 &fec1 {
@@ -52,6 +79,15 @@
 	};
 };
 
+&sai2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_sai2>;
+	assigned-clocks = <&clk IMX8MQ_CLK_SAI2>;
+	assigned-clock-parents = <&clk IMX8MQ_AUDIO_PLL1_OUT>;
+	assigned-clock-rates = <24576000>;
+	status = "okay";
+};
+
 &i2c1 {
 	clock-frequency = <100000>;
 	pinctrl-names = "default";
@@ -223,6 +259,16 @@
 		>;
 	};
 
+	pinctrl_sai2: sai2grp {
+		fsl,pins = <
+			MX8MQ_IOMUXC_SAI2_TXFS_SAI2_TX_SYNC     0xd6
+			MX8MQ_IOMUXC_SAI2_TXC_SAI2_TX_BCLK      0xd6
+			MX8MQ_IOMUXC_SAI2_MCLK_SAI2_MCLK        0xd6
+			MX8MQ_IOMUXC_SAI2_TXD0_SAI2_TX_DATA0    0xd6
+			MX8MQ_IOMUXC_GPIO1_IO08_GPIO1_IO8       0xd6
+		>;
+	};
+
 	pinctrl_i2c1: i2c1grp {
 		fsl,pins = <
 			MX8MQ_IOMUXC_I2C1_SCL_I2C1_SCL			0x4000007f
-- 
2.17.1