Signed-off-by: Ryan Lee ryans.lee@maximintegrated.com --- Changes : added PM suspend and resume function to keep register values from power down
sound/soc/codecs/max98927.c | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-)
diff --git a/sound/soc/codecs/max98927.c b/sound/soc/codecs/max98927.c index 3ab8220..5517251 100644 --- a/sound/soc/codecs/max98927.c +++ b/sound/soc/codecs/max98927.c @@ -803,6 +803,31 @@ static int max98927_probe(struct snd_soc_codec *codec) return 0; }
+#ifdef CONFIG_PM_SLEEP +static int max98927_suspend(struct device *dev) +{ + struct max98927_priv *max98927 = dev_get_drvdata(dev); + + regcache_cache_only(max98927->regmap, true); + regcache_mark_dirty(max98927->regmap); + return 0; +} +static int max98927_resume(struct device *dev) +{ + struct max98927_priv *max98927 = dev_get_drvdata(dev); + + regmap_write(max98927->regmap, + MAX98927_R0100_SOFT_RESET, MAX98927_SOFT_RESET); + regcache_cache_only(max98927->regmap, false); + regcache_sync(max98927->regmap); + return 0; +} +#endif + +static const struct dev_pm_ops max98927_pm = { + SET_SYSTEM_SLEEP_PM_OPS(max98927_suspend, max98927_resume) +}; + static const struct snd_soc_codec_driver soc_codec_dev_max98927 = { .probe = max98927_probe, .component_driver = { @@ -936,7 +961,7 @@ static int max98927_i2c_remove(struct i2c_client *client) .name = "max98927", .of_match_table = of_match_ptr(max98927_of_match), .acpi_match_table = ACPI_PTR(max98927_acpi_match), - .pm = NULL, + .pm = &max98927_pm, }, .probe = max98927_i2c_probe, .remove = max98927_i2c_remove,