ASoC: fsl-asoc-card: add nau8822 support

This is for an imx6sx EVB which has a nau8822 codec connects to the
SSI2 interface, so add the nau8822 support in this machine driver.

Because the codec driver nau8822.c doesn't handle mclk enabling, here
adding a codec_priv->mclk for nau8822 and similar codecs which need to
enable the mclk in the machine driver, and enable the mclk in the
card_late_probe() conditionally.

Signed-off-by: Hui Wang <hui.wang@canonical.com>
Link: https://lore.kernel.org/r/Message-Id: <20220616040046.103524-1-hui.wang@canonical.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: jason77-wang

sound/soc/fsl/fsl-asoc-card.c

@@ -27,6 +27,7 @@
 #include "../codecs/wm8960.h"
 #include "../codecs/wm8994.h"
 #include "../codecs/tlv320aic31xx.h"
+#include "../codecs/nau8822.h"
 
 #define DRIVER_NAME "fsl-asoc-card"
 
@@ -47,6 +48,7 @@
  * @pll_id: PLL id for set_pll()
  */
 struct codec_priv {
+	struct clk *mclk;
 	unsigned long mclk_freq;
 	unsigned long free_freq;
 	u32 mclk_id;
@@ -524,6 +526,9 @@ static int fsl_asoc_card_late_probe(struct snd_soc_card *card)
 		return ret;
 	}
 
+	if (!IS_ERR_OR_NULL(codec_priv->mclk))
+		clk_prepare_enable(codec_priv->mclk);
+
 	return 0;
 }
 
@@ -686,6 +691,14 @@ static int fsl_asoc_card_probe(struct platform_device *pdev)
 		priv->codec_priv.free_freq = priv->codec_priv.mclk_freq;
 		priv->card.dapm_routes = NULL;
 		priv->card.num_dapm_routes = 0;
+	} else if (of_device_is_compatible(np, "fsl,imx-audio-nau8822")) {
+		codec_dai_name = "nau8822-hifi";
+		priv->codec_priv.mclk_id = NAU8822_CLK_MCLK;
+		priv->codec_priv.fll_id = NAU8822_CLK_PLL;
+		priv->codec_priv.pll_id = NAU8822_CLK_PLL;
+		priv->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
+		if (codec_dev)
+			priv->codec_priv.mclk = devm_clk_get(codec_dev, NULL);
 	} else {
 		dev_err(&pdev->dev, "unknown Device Tree compatible\n");
 		ret = -EINVAL;
@@ -911,6 +924,7 @@ static const struct of_device_id fsl_asoc_card_dt_ids[] = {
 	{ .compatible = "fsl,imx-audio-wm8524", },
 	{ .compatible = "fsl,imx-audio-si476x", },
 	{ .compatible = "fsl,imx-audio-wm8958", },
+	{ .compatible = "fsl,imx-audio-nau8822", },
 	{}
 };
 MODULE_DEVICE_TABLE(of, fsl_asoc_card_dt_ids);