[alsa-devel] [PATCH 3/7] ASoC: max98090: Reset codec on resume

[Jarkko Nikula]

From: Liam Girdwood <liam.r.girdwood at linux.intel.com>

Make sure we reset codec and clear any IRQs on resume. This matches
the init sequence in probe.

Signed-off-by: Liam Girdwood <liam.r.girdwood at linux.intel.com>
Signed-off-by: Jarkko Nikula <jarkko.nikula at linux.intel.com>
---
 sound/soc/codecs/max98090.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c
index 4accf9ba447e..b3f447cc050c 100644
--- a/sound/soc/codecs/max98090.c
+++ b/sound/soc/codecs/max98090.c
@@ -2392,9 +2392,32 @@ static int max98090_runtime_suspend(struct device *dev)
 }
 #endif
 
+#ifdef CONFIG_PM
+static int max98090_resume(struct device *dev)
+{
+	struct max98090_priv *max98090 = dev_get_drvdata(dev);
+	unsigned int status;
+
+	max98090_reset(max98090);
+
+	/* clear IRQ status */
+	regmap_read(max98090->regmap, M98090_REG_DEVICE_STATUS, &status);
+
+	regcache_sync(max98090->regmap);
+
+	return 0;
+}
+
+static int max98090_suspend(struct device *dev)
+{
+	return 0;
+}
+#endif
+
 static const struct dev_pm_ops max98090_pm = {
 	SET_RUNTIME_PM_OPS(max98090_runtime_suspend,
 		max98090_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(max98090_suspend, max98090_resume)
 };
 
 static const struct i2c_device_id max98090_i2c_id[] = {
-- 
2.0.0.rc0