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ASoC: dwc: add runtime suspend/resume functionality 

When DW controller is in master mode, it can disable/enable clock
during the device runtime suspend/resume sequence.

Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Maruthi Srinivas Bayyavarapu 2015-12-04 18:40:31 -05:00 committed by Mark Brown
parent 8005c49d9a
commit f48303122d
1 changed files with 25 additions and 1 deletions
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26
sound/soc/dwc/designware_i2s.c
View File

@ -18,6 +18,7 @@
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
#include <sound/designware_i2s.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
@ -394,6 +395,23 @@ static const struct snd_soc_component_driver dw_i2s_component = {
};
#ifdef CONFIG_PM
static int dw_i2s_runtime_suspend(struct device *dev)
{
struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev);
if (dw_dev->capability & DW_I2S_MASTER)
clk_disable(dw_dev->clk);
return 0;
}
static int dw_i2s_runtime_resume(struct device *dev)
{
struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev);
if (dw_dev->capability & DW_I2S_MASTER)
clk_enable(dw_dev->clk);
return 0;
}
static int dw_i2s_suspend(struct snd_soc_dai *dai)
{
@ -649,7 +667,7 @@ static int dw_i2s_probe(struct platform_device *pdev)
goto err_clk_disable;
}
}
pm_runtime_enable(&pdev->dev);
return 0;
err_clk_disable:
@ -665,6 +683,7 @@ static int dw_i2s_remove(struct platform_device *pdev)
if (dev->capability & DW_I2S_MASTER)
clk_disable_unprepare(dev->clk);
pm_runtime_disable(&pdev->dev);
return 0;
}
@ -677,12 +696,17 @@ static const struct of_device_id dw_i2s_of_match[] = {
MODULE_DEVICE_TABLE(of, dw_i2s_of_match);
#endif
static const struct dev_pm_ops dwc_pm_ops = {
SET_RUNTIME_PM_OPS(dw_i2s_runtime_suspend, dw_i2s_runtime_resume, NULL)
};
static struct platform_driver dw_i2s_driver = {
.probe = dw_i2s_probe,
.remove = dw_i2s_remove,
.driver = {
.name = "designware-i2s",
.of_match_table = of_match_ptr(dw_i2s_of_match),
.pm = &dwc_pm_ops,
},
};