1 files changed, 26 insertions, 0 deletions

diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
index 31d092d83c71..d04146cad61f 100644
--- a/sound/soc/tegra/tegra30_i2s.c
+++ b/sound/soc/tegra/tegra30_i2s.c
@@ -514,6 +514,31 @@ static int tegra30_i2s_platform_remove(struct platform_device *pdev)
         return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+static int tegra30_i2s_suspend(struct device *dev)
+{
+        struct tegra30_i2s *i2s = dev_get_drvdata(dev);
+
+        regcache_mark_dirty(i2s->regmap);
+
+        return 0;
+}
+
+static int tegra30_i2s_resume(struct device *dev)
+{
+        struct tegra30_i2s *i2s = dev_get_drvdata(dev);
+        int ret;
+
+        ret = pm_runtime_get_sync(dev);
+        if (ret < 0)
+                return ret;
+        ret = regcache_sync(i2s->regmap);
+        pm_runtime_put(dev);
+
+        return ret;
+}
+#endif
+
 static const struct of_device_id tegra30_i2s_of_match[] = {
         { .compatible = "nvidia,tegra30-i2s", },
         {},
@@ -522,6 +547,7 @@ static const struct of_device_id tegra30_i2s_of_match[] = {
 static const struct dev_pm_ops tegra30_i2s_pm_ops = {
         SET_RUNTIME_PM_OPS(tegra30_i2s_runtime_suspend,
                            tegra30_i2s_runtime_resume, NULL)
+        SET_SYSTEM_SLEEP_PM_OPS(tegra30_i2s_suspend, tegra30_i2s_resume)
 };
 
 static struct platform_driver tegra30_i2s_driver = {