The registers may be lost after suspend due to powerdown. regcache_sync solves this issue.
Signed-off-by: Zhu Ning zhuning@everest-semi.com --- sound/soc/codecs/es8316.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)
diff --git a/sound/soc/codecs/es8316.c b/sound/soc/codecs/es8316.c index de7185f73e1e..8643014472ae 100644 --- a/sound/soc/codecs/es8316.c +++ b/sound/soc/codecs/es8316.c @@ -767,9 +767,31 @@ static void es8316_remove(struct snd_soc_component *component) clk_disable_unprepare(es8316->mclk); }
+static int es8316_resume(struct snd_soc_component *component) +{ + struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component); + + regcache_cache_only(es8316->regmap, false); + regcache_sync(es8316->regmap); + + return 0; +} + +static int es8316_suspend(struct snd_soc_component *component) +{ + struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component); + + regcache_cache_only(es8316->regmap, true); + regcache_mark_dirty(es8316->regmap); + + return 0; +} + static const struct snd_soc_component_driver soc_component_dev_es8316 = { .probe = es8316_probe, .remove = es8316_remove, + .resume = es8316_resume, + .suspend = es8316_suspend, .set_jack = es8316_set_jack, .controls = es8316_snd_controls, .num_controls = ARRAY_SIZE(es8316_snd_controls),