From: "R. Chandrasekar" <rcse...@samsung.com>
This patch adds runtime suspend to resume support for I2S.
I2S clk is disabled at suspend and enabled at resume.
Signed-off-by: R. Chandrasekar <rcse...@samsung.com>
Signed-off-by: Padmavathi Venna <padm...@samsung.com>
---
sound/soc/samsung/i2s.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
index 2fc42f9..d7231e3 100644
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -1071,6 +1071,26 @@ static inline int samsung_i2s_get_driver_data(struct
platform_device *pdev)
return platform_get_device_id(pdev)->driver_data;
}
+#ifdef CONFIG_PM_RUNTIME
+static int i2s_runtime_suspend(struct device *dev)
+{
+ struct i2s_dai *i2s = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(i2s->clk);
+
+ return 0;
+}
+
+static int i2s_runtime_resume(struct device *dev)
+{
+ struct i2s_dai *i2s = dev_get_drvdata(dev);
+
+ clk_prepare_enable(i2s->clk);
+
+ return 0;
+}
+#endif /* CONFIG_PM_RUNTIME */
+
static int samsung_i2s_probe(struct platform_device *pdev)
{
struct i2s_dai *pri_dai, *sec_dai = NULL;
@@ -1288,6 +1308,11 @@ static const struct of_device_id exynos_i2s_match[] = {
MODULE_DEVICE_TABLE(of, exynos_i2s_match);
#endif
+static const struct dev_pm_ops samsung_i2s_pm = {
+ SET_RUNTIME_PM_OPS(i2s_runtime_suspend,
+ i2s_runtime_resume, NULL)
+};
+
static struct platform_driver samsung_i2s_driver = {
.probe = samsung_i2s_probe,
.remove = samsung_i2s_remove,
@@ -1296,6 +1321,7 @@ static struct platform_driver samsung_i2s_driver = {
.name = "samsung-i2s",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(exynos_i2s_match),
+ .pm = &samsung_i2s_pm,
},
};
--
1.7.9.5
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