ASoC: atmel-classd: sync regcache when resuming

The PM functions used in this driver are the ones defined in
sounc/soc/soc-core.c.

When suspending (using snd_soc_suspend), the regcache is marked dirty
but is never synced on resume.

Sync regcache on resume of Atmel ClassD device.

Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/sound/soc/atmel/atmel-classd.c b/sound/soc/atmel/atmel-classd.c
index 7ae46c2647d4..b7ef8c59b49a 100644
--- a/sound/soc/atmel/atmel-classd.c
+++ b/sound/soc/atmel/atmel-classd.c
@@ -301,6 +301,14 @@ static int atmel_classd_codec_probe(struct snd_soc_codec *codec)
         return 0;
 }
 
+static int atmel_classd_codec_resume(struct snd_soc_codec *codec)
+{
+        struct snd_soc_card *card = snd_soc_codec_get_drvdata(codec);
+        struct atmel_classd *dd = snd_soc_card_get_drvdata(card);
+
+        return regcache_sync(dd->regmap);
+}
+
 static struct regmap *atmel_classd_codec_get_remap(struct device *dev)
 {
         return dev_get_regmap(dev, NULL);
@@ -308,6 +316,7 @@ static struct regmap *atmel_classd_codec_get_remap(struct device *dev)
 
 static struct snd_soc_codec_driver soc_codec_dev_classd = {
         .probe          = atmel_classd_codec_probe,
+        .resume         = atmel_classd_codec_resume,
         .get_regmap     = atmel_classd_codec_get_remap,
         .component_driver = {
                 .controls               = atmel_classd_snd_controls,