ASoC: ak4613: 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.

Based on commit a2ebd58627e9aa48 ("ASoC: ak4642: Implement suspend
callback") by Peter Ujfalusi <peter.ujfalusi@ti.com>.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/ak4613.c b/sound/soc/codecs/ak4613.c
index 5013d2ba0c10a968045d83e5e5cef6e223e55436..97798d250f08689eff1093979e2ce9bb116f66eb 100644 (file)
--- a/sound/soc/codecs/ak4613.c
+++ b/sound/soc/codecs/ak4613.c
@@ -437,15 +437,25 @@ static struct snd_soc_dai_driver ak4613_dai = {
        .symmetric_rates = 1,
 };
 
-static int ak4613_resume(struct snd_soc_codec *codec)
+static int ak4613_suspend(struct snd_soc_codec *codec)
 {
        struct regmap *regmap = dev_get_regmap(codec->dev, NULL);
 
+       regcache_cache_only(regmap, true);
        regcache_mark_dirty(regmap);
+       return 0;
+}
+
+static int ak4613_resume(struct snd_soc_codec *codec)
+{
+       struct regmap *regmap = dev_get_regmap(codec->dev, NULL);
+
+       regcache_cache_only(regmap, false);
        return regcache_sync(regmap);
 }
 
 static struct snd_soc_codec_driver soc_codec_dev_ak4613 = {
+       .suspend                = ak4613_suspend,
        .resume                 = ak4613_resume,
        .set_bias_level         = ak4613_set_bias_level,
        .controls               = ak4613_snd_controls,