[PATCH] ASoC: max98373: Mark cache dirty before entering sleep

[Ryan Lee]

Amp lose its register values in case amp power loss or
'ForceReset' over Soundwire SCP_ctrl register(0x0044) or
HW_RESET pin control during the audio suspend and resume.
Mark cache dirty before audio suspension to restore
existing values when audio resume.

Signed-off-by: Ryan Lee <ryans.lee at maximintegrated.com>
---
 sound/soc/codecs/max98373-sdw.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/codecs/max98373-sdw.c b/sound/soc/codecs/max98373-sdw.c
index dc520effc61c..a7e4a6e880b0 100644
--- a/sound/soc/codecs/max98373-sdw.c
+++ b/sound/soc/codecs/max98373-sdw.c
@@ -259,6 +259,7 @@ static __maybe_unused int max98373_suspend(struct device *dev)
 		regmap_read(max98373->regmap, max98373->cache[i].reg, &max98373->cache[i].val);
 
 	regcache_cache_only(max98373->regmap, true);
+	regcache_mark_dirty(max98373->regmap);
 
 	return 0;
 }
-- 
2.17.1