forked from Minki/linux
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>
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@ -1071,6 +1071,26 @@ static inline int samsung_i2s_get_driver_data(struct platform_device *pdev)
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return platform_get_device_id(pdev)->driver_data;
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}
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#ifdef CONFIG_PM_RUNTIME
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static int i2s_runtime_suspend(struct device *dev)
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{
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struct i2s_dai *i2s = dev_get_drvdata(dev);
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clk_disable_unprepare(i2s->clk);
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return 0;
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}
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static int i2s_runtime_resume(struct device *dev)
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{
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struct i2s_dai *i2s = dev_get_drvdata(dev);
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clk_prepare_enable(i2s->clk);
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return 0;
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}
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#endif /* CONFIG_PM_RUNTIME */
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static int samsung_i2s_probe(struct platform_device *pdev)
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{
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struct i2s_dai *pri_dai, *sec_dai = NULL;
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@ -1288,6 +1308,11 @@ static const struct of_device_id exynos_i2s_match[] = {
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MODULE_DEVICE_TABLE(of, exynos_i2s_match);
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#endif
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static const struct dev_pm_ops samsung_i2s_pm = {
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SET_RUNTIME_PM_OPS(i2s_runtime_suspend,
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i2s_runtime_resume, NULL)
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};
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static struct platform_driver samsung_i2s_driver = {
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.probe = samsung_i2s_probe,
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.remove = samsung_i2s_remove,
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@ -1296,6 +1321,7 @@ static struct platform_driver samsung_i2s_driver = {
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.name = "samsung-i2s",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(exynos_i2s_match),
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.pm = &samsung_i2s_pm,
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},
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};
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