ASoC: ak4642: Implement suspend callback

Add the suspend callback to accompany the existing resume operation.
With the suspend/resume callbacks the regmap (regcache) state handling can
follow the recommended sequence.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/ak4642.c b/sound/soc/codecs/ak4642.c
index 4d8b9e49e8d6dcb47f7c6516561fd98d847bfdf9..cc941d66ec3d2f4d1d75104f46c1329ebb9abb8a 100644 (file)
--- a/sound/soc/codecs/ak4642.c
+++ b/sound/soc/codecs/ak4642.c
@@ -523,15 +523,23 @@ static struct snd_soc_dai_driver ak4642_dai = {
        .symmetric_rates = 1,
 };
 
-static int ak4642_resume(struct snd_soc_codec *codec)
+static int ak4642_suspend(struct snd_soc_codec *codec)
 {
        struct regmap *regmap = dev_get_regmap(codec->dev, NULL);
 
+       regcache_cache_only(regmap, true);
        regcache_mark_dirty(regmap);
-       regcache_sync(regmap);
        return 0;
 }
 
+static int ak4642_resume(struct snd_soc_codec *codec)
+{
+       struct regmap *regmap = dev_get_regmap(codec->dev, NULL);
+
+       regcache_cache_only(regmap, false);
+       regcache_sync(regmap);
+       return 0;
+}
 static int ak4642_probe(struct snd_soc_codec *codec)
 {
        struct ak4642_priv *priv = snd_soc_codec_get_drvdata(codec);
@@ -544,6 +552,7 @@ static int ak4642_probe(struct snd_soc_codec *codec)
 
 static struct snd_soc_codec_driver soc_codec_dev_ak4642 = {
        .probe                  = ak4642_probe,
+       .suspend                = ak4642_suspend,
        .resume                 = ak4642_resume,
        .set_bias_level         = ak4642_set_bias_level,
        .controls               = ak4642_snd_controls,