[alsa-devel] [PATCH v2 1/2] ASoC: rt5670: Add runtime PM support

[Bard Liao]

This patch adds runtime PM support on rt5670 codec.

Signed-off-by: Lin Mengdong <mengdong.lin at intel.com>
Signed-off-by: Bard Liao <bardliao at realtek.com>
---
* Remove the unused runtime suspend/resume code. We will switch
  the sysclk source on another patch.
---
 sound/soc/codecs/rt5670.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/sound/soc/codecs/rt5670.c b/sound/soc/codecs/rt5670.c
index 09cf100..a8a471b 100644
--- a/sound/soc/codecs/rt5670.c
+++ b/sound/soc/codecs/rt5670.c
@@ -14,6 +14,7 @@
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/pm.h>
+#include <linux/pm_runtime.h>
 #include <linux/i2c.h>
 #include <linux/platform_device.h>
 #include <linux/acpi.h>
@@ -2734,18 +2735,26 @@ static int rt5670_i2c_probe(struct i2c_client *i2c,
 
 	}
 
+	pm_runtime_enable(&i2c->dev);
+	pm_request_idle(&i2c->dev);
+
 	ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_rt5670,
 			rt5670_dai, ARRAY_SIZE(rt5670_dai));
 	if (ret < 0)
 		goto err;
 
+	pm_runtime_put(&i2c->dev);
+
 	return 0;
 err:
+	pm_runtime_disable(&i2c->dev);
+
 	return ret;
 }
 
 static int rt5670_i2c_remove(struct i2c_client *i2c)
 {
+	pm_runtime_disable(&i2c->dev);
 	snd_soc_unregister_codec(&i2c->dev);
 
 	return 0;
-- 
1.8.1.1.439.g50a6b54