[PATCH v2 8/8] ASoC: cs42l42: Wait for debounce interval after resume

[Stefan Binding]

Since clock stop causes bus reset on Intel controllers, we need
to wait for the debounce interval on resume, to ensure all the
interrupt status registers are set correctly.

Signed-off-by: Stefan Binding <sbinding at opensource.cirrus.com>
---
 sound/soc/codecs/cs42l42-sdw.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/cs42l42-sdw.c b/sound/soc/codecs/cs42l42-sdw.c
index 67800b275e422..27653ea0f947c 100644
--- a/sound/soc/codecs/cs42l42-sdw.c
+++ b/sound/soc/codecs/cs42l42-sdw.c
@@ -451,14 +451,22 @@ static int __maybe_unused cs42l42_sdw_handle_unattach(struct cs42l42_private *cs
 
 static int __maybe_unused cs42l42_sdw_runtime_resume(struct device *dev)
 {
+	static const unsigned int ts_dbnce_ms[] = { 0, 125, 250, 500, 750, 1000, 1250, 1500};
 	struct cs42l42_private *cs42l42 = dev_get_drvdata(dev);
+	unsigned int dbnce;
 	int ret;
 
 	dev_dbg(dev, "Runtime resume\n");
 
 	ret = cs42l42_sdw_handle_unattach(cs42l42);
-	if (ret < 0)
+	if (ret < 0) {
 		return ret;
+	} else if (ret > 0) {
+		dbnce = max(cs42l42->ts_dbnc_rise, cs42l42->ts_dbnc_fall);
+
+		if (dbnce > 0)
+			msleep(ts_dbnce_ms[dbnce]);
+	}
 
 	regcache_cache_only(cs42l42->regmap, false);
 
-- 
2.34.1