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ASoC: Samsung: I2S: Add support for runtime S2R 

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 <rcsekar@samsung.com>
Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
R. Chandrasekar 2013-01-30 17:41:04 +05:30 committed by Mark Brown
parent 313367e7bf
commit 5b1d3c3472
1 changed files with 26 additions and 0 deletions
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26
sound/soc/samsung/i2s.c
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@ -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,
},
};