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authorYong Zhi <yong.zhi@intel.com>2015-11-09 12:56:00 -0800
committerMark Brown <broonie@kernel.org>2015-11-16 17:43:47 +0000
commit4454a8378be5809c2b830531bb4c4712b5e46bef (patch)
tree27841185d913d456f2a5ab20a4c62dd03cd3f1b1
parent8005c49d9aea74d382f474ce11afbbc7d7130bec (diff)
downloadop-kernel-dev-4454a8378be5809c2b830531bb4c4712b5e46bef.zip
op-kernel-dev-4454a8378be5809c2b830531bb4c4712b5e46bef.tar.gz
ASoC: nau8825: add pm function
This patch adds pm function and fixes following issues 1.i2c timeout after resume, after resume we saw interrupt handler is called prior to i2c controller is resumed.This causes i2c timeout 2.no audio after resume Signed-off-by: Fang, Yang A <yang.a.fang@intel.com> Signed-off-by: Yong Zhi <yong.zhi@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
-rw-r--r--sound/soc/codecs/nau8825.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/sound/soc/codecs/nau8825.c b/sound/soc/codecs/nau8825.c
index 7fc7b4e..c1b87c5 100644
--- a/sound/soc/codecs/nau8825.c
+++ b/sound/soc/codecs/nau8825.c
@@ -1271,6 +1271,36 @@ static int nau8825_i2c_remove(struct i2c_client *client)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int nau8825_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct nau8825 *nau8825 = dev_get_drvdata(dev);
+
+ disable_irq(client->irq);
+ regcache_cache_only(nau8825->regmap, true);
+ regcache_mark_dirty(nau8825->regmap);
+
+ return 0;
+}
+
+static int nau8825_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct nau8825 *nau8825 = dev_get_drvdata(dev);
+
+ regcache_cache_only(nau8825->regmap, false);
+ regcache_sync(nau8825->regmap);
+ enable_irq(client->irq);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops nau8825_pm = {
+ SET_SYSTEM_SLEEP_PM_OPS(nau8825_suspend, nau8825_resume)
+};
+
static const struct i2c_device_id nau8825_i2c_ids[] = {
{ "nau8825", 0 },
{ }
@@ -1297,6 +1327,7 @@ static struct i2c_driver nau8825_driver = {
.name = "nau8825",
.of_match_table = of_match_ptr(nau8825_of_ids),
.acpi_match_table = ACPI_PTR(nau8825_acpi_match),
+ .pm = &nau8825_pm,
},
.probe = nau8825_i2c_probe,
.remove = nau8825_i2c_remove,
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