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Commit f4830312 authored by Maruthi Srinivas Bayyavarapu's avatar Maruthi Srinivas Bayyavarapu Committed by Mark Brown
Browse files

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: default avatarMaruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 8005c49d

sound/soc/dwc/designware_i2s.c

+25 −1
Original line number Diff line number Diff line
@@ -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,

	},

};