From: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Martin Povišer <povik+lin@xxxxxxxxxxx>
---
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 451357a1c315..2efec8cce089 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;
}
@@ -2416,7 +2436,7 @@ 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
--
2.33.0
