From: "R. Chandrasekar" <rcsekar@xxxxxxxxxxx>
This patch adds runtime suspend to resume support for I2S.
Signed-off-by: Padmavathi Venna <padma.v@xxxxxxxxxxx>
Signed-off-by: R. Chandrasekar <rcsekar@xxxxxxxxxxx>
---
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 d2d124f..27a5ab1 100644
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -993,6 +993,26 @@ static struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec)
return i2s;
}
+#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)
{
u32 dma_pl_chan, dma_cp_chan, dma_pl_sec_chan;
@@ -1143,12 +1163,18 @@ static int samsung_i2s_remove(struct platform_device *pdev)
return 0;
}
+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,
.driver = {
.name = "samsung-i2s",
.owner = THIS_MODULE,
+ .pm = &samsung_i2s_pm,
},
};
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
