[PATCH v6 09/12] ASoC: wm9712: add ac97 new bus support

[Robert Jarzmik]

Add support for the new ac97 bus model, where devices are automatically
discovered on AC-Links.

Signed-off-by: Robert Jarzmik <robert.jarz...@free.fr>
---
Since v4:
 - added #ifdef spotted by Charles
---
 sound/soc/codecs/Kconfig  |  3 ++-
 sound/soc/codecs/wm9712.c | 39 ++++++++++++++++++++++++++-------------
 2 files changed, 28 insertions(+), 14 deletions(-)

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index aebf148d7e4d..f17af3592785 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -206,7 +206,7 @@ config SND_SOC_ALL_CODECS
        select SND_SOC_WM9081 if I2C
        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_WM9712 if (SND_SOC_AC97_BUS || SND_SOC_AC97_BUS_NEW)
        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
@@ -1087,6 +1087,7 @@ config SND_SOC_WM9705
 config SND_SOC_WM9712
        tristate
        select REGMAP_AC97
+       select AC97_BUS_COMPAT if AC97_BUS_NEW
 
 config SND_SOC_WM9713
        tristate
diff --git a/sound/soc/codecs/wm9712.c b/sound/soc/codecs/wm9712.c
index 1a3e1797994a..7ebbb48b18c5 100644
--- a/sound/soc/codecs/wm9712.c
+++ b/sound/soc/codecs/wm9712.c
@@ -12,6 +12,7 @@
 
 #include <linux/init.h>
 #include <linux/slab.h>
+#include <linux/mfd/wm97xx.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
@@ -19,6 +20,8 @@
 #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/soc.h>
 #include <sound/tlv.h>
@@ -30,6 +33,7 @@ struct wm9712_priv {
        struct snd_ac97 *ac97;
        unsigned int hp_mixer[2];
        struct mutex lock;
+       struct wm97xx_platform_data *mfd_pdata;
 };
 
 static const struct reg_default wm9712_reg_defaults[] = {
@@ -636,18 +640,25 @@ static int wm9712_soc_probe(struct snd_soc_codec *codec)
        struct regmap *regmap;
        int ret;
 
-       wm9712->ac97 = snd_soc_new_ac97_codec(codec, WM9712_VENDOR_ID,
-               WM9712_VENDOR_ID_MASK);
-       if (IS_ERR(wm9712->ac97)) {
-               ret = PTR_ERR(wm9712->ac97);
-               dev_err(codec->dev, "Failed to register AC97 codec: %d\n", ret);
-               return ret;
-       }
-
-       regmap = regmap_init_ac97(wm9712->ac97, &wm9712_regmap_config);
-       if (IS_ERR(regmap)) {
-               ret = PTR_ERR(regmap);
-               goto err_free_ac97_codec;
+       if (wm9712->mfd_pdata) {
+               wm9712->ac97 = wm9712->mfd_pdata->ac97;
+               regmap = wm9712->mfd_pdata->regmap;
+       } else {
+#ifdef CONFIG_SND_SOC_AC97_BUS
+               wm9712->ac97 = snd_soc_new_ac97_codec(codec, WM9712_VENDOR_ID,
+                                                     WM9712_VENDOR_ID_MASK);
+               if (IS_ERR(wm9712->ac97)) {
+                       ret = PTR_ERR(wm9712->ac97);
+                       dev_err(codec->dev,
+                               "Failed to register AC97 codec: %d\n", ret);
+                       return ret;
+               }
+
+               regmap = regmap_init_ac97(wm9712->ac97, &wm9712_regmap_config);
+               if (IS_ERR(regmap)) {
+                       ret = PTR_ERR(regmap);
+                       goto err_free_ac97_codec;
+#endif
        }
 
        snd_soc_codec_init_regmap(codec, regmap);
@@ -666,7 +677,8 @@ static int wm9712_soc_remove(struct snd_soc_codec *codec)
        struct wm9712_priv *wm9712 = snd_soc_codec_get_drvdata(codec);
 
        snd_soc_codec_exit_regmap(codec);
-       snd_soc_free_ac97_codec(wm9712->ac97);
+       if (!wm9712->mfd_pdata)
+               snd_soc_free_ac97_codec(wm9712->ac97);
        return 0;
 }
 
@@ -697,6 +709,7 @@ static int wm9712_probe(struct platform_device *pdev)
 
        mutex_init(&wm9712->lock);
 
+       wm9712->mfd_pdata = dev_get_platdata(&pdev->dev);
        platform_set_drvdata(pdev, wm9712);
 
        return snd_soc_register_codec(&pdev->dev,
-- 
2.11.0