ASoC: wm9713: add ac97 new bus support

Add support for the new ac97 bus model, where devices are automatically
discovered on AC-Links.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/Kconfig

@@ -216,7 +216,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_WM9090 if I2C
 	select SND_SOC_WM9705 if SND_SOC_AC97_BUS
 	select SND_SOC_WM9712 if SND_SOC_AC97_BUS
-	select SND_SOC_WM9713 if SND_SOC_AC97_BUS
+	select SND_SOC_WM9713 if (SND_SOC_AC97_BUS || SND_SOC_AC97_BUS_NEW)
         help
           Normally ASoC codec drivers are only built if a machine driver which
           uses them is also built since they are only usable with a machine
@@ -1136,6 +1136,7 @@ config SND_SOC_WM9712
 config SND_SOC_WM9713
 	tristate
 	select REGMAP_AC97
+	select AC97_BUS_COMPAT if AC97_BUS_NEW
 
 config SND_SOC_ZX_AUD96P22
 	tristate "ZTE ZX AUD96P22 CODEC"

sound/soc/codecs/wm9713.c

@@ -17,12 +17,15 @@
 
 #include <linux/init.h>
 #include <linux/slab.h>
+#include <linux/mfd/wm97xx.h>
 #include <linux/module.h>
 #include <linux/device.h>
 #include <linux/regmap.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/ac97_codec.h>
+#include <sound/ac97/codec.h>
+#include <sound/ac97/compat.h>
 #include <sound/initval.h>
 #include <sound/pcm_params.h>
 #include <sound/tlv.h>
@@ -38,6 +41,7 @@ struct wm9713_priv {
 	u32 pll_in; /* PLL input frequency */
 	unsigned int hp_mixer[2];
 	struct mutex lock;
+	struct wm97xx_platform_data *mfd_pdata;
 };
 
 #define HPL_MIXER 0
@@ -1205,18 +1209,24 @@ static int wm9713_soc_resume(struct snd_soc_codec *codec)
 static int wm9713_soc_probe(struct snd_soc_codec *codec)
 {
 	struct wm9713_priv *wm9713 = snd_soc_codec_get_drvdata(codec);
-	struct regmap *regmap;
+	struct regmap *regmap = NULL;
 
+	if (wm9713->mfd_pdata) {
+		wm9713->ac97 = wm9713->mfd_pdata->ac97;
+		regmap = wm9713->mfd_pdata->regmap;
+	} else {
+#ifdef CONFIG_SND_SOC_AC97_BUS
 		wm9713->ac97 = snd_soc_new_ac97_codec(codec, WM9713_VENDOR_ID,
 						      WM9713_VENDOR_ID_MASK);
 		if (IS_ERR(wm9713->ac97))
 			return PTR_ERR(wm9713->ac97);
-
 		regmap = regmap_init_ac97(wm9713->ac97, &wm9713_regmap_config);
 		if (IS_ERR(regmap)) {
 			snd_soc_free_ac97_codec(wm9713->ac97);
 			return PTR_ERR(regmap);
 		}
+#endif
+	}
 
 	snd_soc_codec_init_regmap(codec, regmap);
 
@@ -1228,10 +1238,14 @@ static int wm9713_soc_probe(struct snd_soc_codec *codec)
 
 static int wm9713_soc_remove(struct snd_soc_codec *codec)
 {
+#ifdef CONFIG_SND_SOC_AC97_BUS
 	struct wm9713_priv *wm9713 = snd_soc_codec_get_drvdata(codec);
 
+	if (!wm9713->mfd_pdata) {
 		snd_soc_codec_exit_regmap(codec);
 		snd_soc_free_ac97_codec(wm9713->ac97);
+	}
+#endif
 	return 0;
 }
 
@@ -1262,6 +1276,7 @@ static int wm9713_probe(struct platform_device *pdev)
 
 	mutex_init(&wm9713->lock);
 
+	wm9713->mfd_pdata = dev_get_platdata(&pdev->dev);
 	platform_set_drvdata(pdev, wm9713);
 
 	return snd_soc_register_codec(&pdev->dev,