[alsa-devel] [PATCH 2/7] ASoC: max98090: Fix reset at resume time.

Jarkko Nikula jarkko.nikula at linux.intel.com
Fri May 16 15:55:20 CEST 2014

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

Reset needs to wait 20ms before other codec IO is performed. This wait
was not being performed. Fix this by making sure the reset register is not
restored with the cache, but use the manual reset method in resume with
the wait.

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 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c
index 9e08c4768bc0..4accf9ba447e 100644
--- a/sound/soc/codecs/max98090.c
+++ b/sound/soc/codecs/max98090.c
@@ -256,6 +256,7 @@ static struct reg_default max98090_reg[] = {
 static bool max98090_volatile_register(struct device *dev, unsigned int reg)
 	switch (reg) {
 	case M98090_REG_DEVICE_STATUS:
 	case M98090_REG_JACK_STATUS:
 	case M98090_REG_REVISION_ID:
@@ -2374,6 +2375,8 @@ static int max98090_runtime_resume(struct device *dev)
 	regcache_cache_only(max98090->regmap, false);
+	max98090_reset(max98090);
 	return 0;

More information about the Alsa-devel mailing list