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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>
This commit is contained in:
Yong Zhi 2015-11-09 12:56:00 -08:00 committed by Mark Brown
parent 8005c49d9a
commit 4454a8378b
1 changed files with 31 additions and 0 deletions
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31
sound/soc/codecs/nau8825.c
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@ -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,