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Commit 68f15de9 authored by Chaithrika U S's avatar Chaithrika U S Committed by Kevin Hilman
Browse files

i2c: davinci: Add suspend/resume support 



Add suspend and resume callbacks to DaVinci I2C driver.
This has been tested on DA850/OMAP-L138 EVM.

Signed-off-by: default avatarChaithrika U S <chaithrika@ti.com>
Acked-by: default avatarKevin Hilman <khilman@deeprootsystems.com>
parent 5ae5b113

drivers/i2c/busses/i2c-davinci.c

+36 −0
Original line number Diff line number Diff line
@@ -646,6 +646,41 @@ static int davinci_i2c_remove(struct platform_device *pdev) 
	return 0;

}



#ifdef CONFIG_PM

static int davinci_i2c_suspend(struct device *dev)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct davinci_i2c_dev *i2c_dev = platform_get_drvdata(pdev);



	/* put I2C into reset */

	davinci_i2c_reset_ctrl(i2c_dev, 0);

	clk_disable(i2c_dev->clk);



	return 0;

}



static int davinci_i2c_resume(struct device *dev)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct davinci_i2c_dev *i2c_dev = platform_get_drvdata(pdev);



	clk_enable(i2c_dev->clk);

	/* take I2C out of reset */

	davinci_i2c_reset_ctrl(i2c_dev, 1);



	return 0;

}



static const struct dev_pm_ops davinci_i2c_pm = {

	.suspend        = davinci_i2c_suspend,

	.resume         = davinci_i2c_resume,

};



#define davinci_i2c_pm_ops (&davinci_i2c_pm)

#else

#define davinci_i2c_pm_ops NULL

#endif



/* work with hotplug and coldplug */

MODULE_ALIAS("platform:i2c_davinci");
@@ -655,6 +690,7 @@ static struct platform_driver davinci_i2c_driver = { 
	.driver		= {

		.name	= "i2c_davinci",

		.owner	= THIS_MODULE,

		.pm	= davinci_i2c_pm_ops,

	},

};