[PATCH v5 5/5] arm64: dts: imx8mp: Add analog audio output on i.MX8MP EVK

[Marco Felsch]

Hi Marek,

thanks for switching to simple-audio-card :)

On 23-02-27, Marek Vasut wrote:
> 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
> ---
>  arch/arm64/boot/dts/freescale/imx8mp-evk.dts | 74 ++++++++++++++++++++
>  1 file changed, 74 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
> index 7816853162b3f..f2285ed9f70b1 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
> @@ -40,6 +40,15 @@ pcie0_refclk: pcie0-refclk {
>  		clock-frequency = <100000000>;
>  	};
>  
> +	reg_audio_pwr: regulator-audio-pwr {
> +		compatible = "regulator-fixed";
> +		regulator-name = "audio-pwr";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		gpio = <&gpio4 29 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;

We should have a proper pinctrl setup for the regulator device.

> +	};
> +
>  	reg_can1_stby: regulator-can1-stby {
>  		compatible = "regulator-fixed";
>  		regulator-name = "can1-stby";
> @@ -83,6 +92,37 @@ 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 +384,18 @@ &i2c3 {
>  	pinctrl-0 = <&pinctrl_i2c3>;
>  	status = "okay";
>  
> +	wm8960: codec at 1a {
> +		#sound-dai-cells = <0>;
> +		compatible = "wlf,wm8960";
> +		reg = <0x1a>;

The compatible should be the first property followed by the reg
property.

> +		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 +474,16 @@ &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";
>  };
> @@ -668,6 +730,18 @@ 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
> +			MX8MP_IOMUXC_SAI3_RXFS__GPIO4_IO28		0xd6

What is gpio04-io28 used for?

> +			MX8MP_IOMUXC_SAI3_RXC__GPIO4_IO29		0xd6
> +		>;
> +	};

Regards,
  Marco