From: Richard Fitzgerald rf@opensource.cirrus.com
On SoundWire the system resume cannot restore registers until the host controller has re-enumerated the peripheral.
This patch splits cs42l42_resume() into two functions, one to power up and the other to restore registers, ready for adding SoundWire support.
Signed-off-by: Richard Fitzgerald rf@opensource.cirrus.com Signed-off-by: Martin Povišer povik+lin@cutebit.org --- sound/soc/codecs/cs42l42.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c index 427b29db2252..156d1b181cef 100644 --- a/sound/soc/codecs/cs42l42.c +++ b/sound/soc/codecs/cs42l42.c @@ -2183,6 +2183,15 @@ static int __maybe_unused cs42l42_resume(struct device *dev) gpiod_set_value_cansleep(cs42l42->reset_gpio, 1); usleep_range(CS42L42_BOOT_TIME_US, CS42L42_BOOT_TIME_US * 2);
+ dev_dbg(dev, "System resume powered up\n"); + + return 0; +} + +static void __maybe_unused cs42l42_resume_restore(struct device *dev) +{ + struct cs42l42_private *cs42l42 = dev_get_drvdata(dev); + regcache_cache_only(cs42l42->regmap, false); regcache_mark_dirty(cs42l42->regmap);
@@ -2195,6 +2204,17 @@ static int __maybe_unused cs42l42_resume(struct device *dev) mutex_unlock(&cs42l42->irq_lock);
dev_dbg(dev, "System resumed\n"); +} + +static int __maybe_unused cs42l42_i2c_resume(struct device *dev) +{ + int ret; + + ret = cs42l42_resume(dev); + if (ret) + return ret; + + cs42l42_resume_restore(dev);
return 0; } @@ -2413,7 +2433,7 @@ static int cs42l42_i2c_remove(struct i2c_client *i2c_client) }
static const struct dev_pm_ops cs42l42_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(cs42l42_suspend, cs42l42_resume) + SET_SYSTEM_SLEEP_PM_OPS(cs42l42_suspend, cs42l42_i2c_resume) };
#ifdef CONFIG_OF