arm64: dts: imx8mq-evk: Enable audio codec wm8524

The main Audio DAC used on the EVK board is wm8524
The EVK provides the MCLK to wm8524.

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

This patch sets:
        * SAI2 pinctrl configuration
        * clock hierarchy
        * wm8524 codec

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

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
index afea110..304c280 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
@@ -43,6 +43,35 @@
                states = <1000000 0x0
                          900000 0x1>;
        };
+
+       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>;
+               };
+       };
 };
 
 &A53_0 {
@@ -80,6 +109,15 @@
        };
 };
 
+&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";
@@ -283,6 +321,16 @@
                >;
        };
 
+       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_uart1: uart1grp {
                fsl,pins = <
                        MX8MQ_IOMUXC_UART1_RXD_UART1_DCE_RX             0x49