[PATCH] Add dts to support MAX98090/91 with i.MX8MM-evk

[Hardevsinh Palaniya]

- Add sound-max98090 node to support external codec MAX98090/91
- Use i2c3 for i2c communicate with codec
- Use sai5 for i2s communication

Signed-off-by: Hardevsinh Palaniya <hardevsinh.palaniya@xxxxxxxxxxxxxxxxx>

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk-max98090-91.dts b/arch/arm64/boot/dts/freescale/imx8mm-evk-max98090-91.dts
new file mode 100644
index 000000000000..d053c586514a
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-evk-max98090-91.dts
@@ -0,0 +1,65 @@
+#include "imx8mm-evk.dtsi"
+
+/ {
+	sound-max98090 {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "max98090-audio";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,frame-master = <&cpudai>;
+		simple-audio-card,bitclock-master = <&cpudai>;
+		simple-audio-card,widgets = "Speakers", "Speakers";
+		simple-audio-card,routing =
+				"Speakers", "SPKR",
+				"Speakers", "SPKL",
+				"IN1", "MICBIAS",
+				"MIC1","IN1",
+				"MIC2","IN1";
+
+		cpudai: simple-audio-card,cpu {
+			sound-dai = <&sai5>;
+			dai-tdm-slot-num = <2>;
+			dai-tdm-slot-width = <32>;
+		};
+
+		simple-audio-card,codec {
+			sound-dai = <&max98090>;
+			clocks = <&clk IMX8MM_CLK_SAI5_ROOT>;
+		};
+	};
+}
+
+&i2c3 {
+	max98090: audio-codec@10 {
+		compatible = "maxim,max98090","maxim,max98091";
+		#sound-dai-ceddlls = <0>;
+		reg = <0x10>;
+		clocks = <&clk IMX8MM_CLK_SAI5_ROOT>;
+		clock-names = "mclk";
+	};
+}
+
+&sai5 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_sai5>;
+	assigned-clocks = <&clk IMX8MM_CLK_SAI5>;
+	assigned-clock-parents = <&clk IMX8MM_AUDIO_PLL1_OUT>;
+	assigned-clock-rates = <24576000>;
+	clocks = <&clk IMX8MM_CLK_SAI5_IPG>, <&clk IMX8MM_CLK_DUMMY>,
+		<&clk IMX8MM_CLK_SAI5_ROOT>, <&clk IMX8MM_CLK_DUMMY>,
+		<&clk IMX8MM_CLK_DUMMY>, <&clk IMX8MM_AUDIO_PLL1_OUT>,
+		<&clk IMX8MM_AUDIO_PLL2_OUT>;
+	clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3", "pll8k", "pll11k";
+	status = "okay";
+};
+
+&iomuxc {
+	pinctrl_sai5: sai5grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI5_MCLK_SAI5_MCLK        0xd6
+			MX8MM_IOMUXC_SAI5_RXD2_SAI5_TX_BCLK     0xd6
+			MX8MM_IOMUXC_SAI5_RXD1_SAI5_TX_SYNC     0xd6
+			MX8MM_IOMUXC_SAI5_RXD0_SAI5_RX_DATA0    0xd6
+			MX8MM_IOMUXC_SAI5_RXD3_SAI5_TX_DATA0    0xd6
+		>;
+	}
+}
-- 
2.25.1
________________________________________
From: Daniel Baluta <daniel.baluta@xxxxxxxxx>
Sent: Wednesday, January 11, 2023 5:26 PM
To: Hardevsinh Palaniya; Daniel Baluta
Cc: robh+dt@xxxxxxxxxx; krzysztof.kozlowski+dt@xxxxxxxxxx; shawnguo@xxxxxxxxxx; s.hauer@xxxxxxxxxxxxxx; kernel@xxxxxxxxxxxxxx; festevam@xxxxxxxxx; linux-imx@xxxxxxx; lgirdwood@xxxxxxxxx; broonie@xxxxxxxxxx; perex@xxxxxxxx; tiwai@xxxxxxxx; peng.fan@xxxxxxx; m.felsch@xxxxxxxxxxxxxx; shengjiu.wang@xxxxxxx; Markus.Niebel@xxxxxxxxxxxxxxx; hongxing.zhu@xxxxxxx; tommaso.merciai@xxxxxxxxxxxxxxxxxxxx; jun.li@xxxxxxx; ckeepax@xxxxxxxxxxxxxxxxxxxxx; rf@xxxxxxxxxxxxxxxxxxxxx; povik+lin@xxxxxxxxxxx; pierre-louis.bossart@xxxxxxxxxxxxxxx; james.schulman@xxxxxxxxxx; flatmax@xxxxxxxxxxx; srinivas.kandagatla@xxxxxxxxxx; ryan.lee.analog@xxxxxxxxx; devicetree@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; alsa-devel@xxxxxxxxxxxxxxxx
Subject: Re: [PATCH] Support for MAX98090/91 codec in iMX8MM evk


 > I have added support for the external codec MAX98091 with I.MX8MM-EVK.

Please fix your email client to start sending email in text format only.

Now, going back to the matter at hand.

I do think that for an external codec we should find a smarter way of enabling it.

What would happen if you enable MAX codec in the dts but expander board is not plugged in?

Maybe create a separate dts which includes imx8mm-evk.dtsi?