ASoC: max98927: Added PM suspend and resume function

Signed-off-by: Ryan Lee <ryans.lee@maximintegrated.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/max98927.c b/sound/soc/codecs/max98927.c
index 5b85360..caf5340 100644 (file)
--- a/sound/soc/codecs/max98927.c
+++ b/sound/soc/codecs/max98927.c
@@ -701,6 +701,31 @@ 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 = {
@@ -834,7 +859,7 @@ static struct i2c_driver max98927_i2c_driver = {
                .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,