From: Stephen Warren <swarren@xxxxxxxxxx>
Add tegra30_i2s_{suspend,resume}. These use regcache functions to
restore all HW registers after power loss during a suspend/resume cycle.
Signed-off-by: Stephen Warren <swarren@xxxxxxxxxx>
---
sound/soc/tegra/tegra30_i2s.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
index 31d092d..bd0ebc0 100644
--- a/sound/soc/tegra/tegra30_i2s.c
+++ b/sound/soc/tegra/tegra30_i2s.c
@@ -514,6 +514,24 @@ 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);
+
+ return regcache_sync(i2s->regmap);
+}
+#endif
+
static const struct of_device_id tegra30_i2s_of_match[] = {
{ .compatible = "nvidia,tegra30-i2s", },
{},
@@ -522,6 +540,7 @@ 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 = {
--
1.7.10.4
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