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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: Chaithrika U S <chaithrika@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Chaithrika U S 2010-01-06 14:54:59 +05:30 committed by Kevin Hilman
parent 5ae5b1136e
commit 68f15de976
1 changed files with 36 additions and 0 deletions
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36
drivers/i2c/busses/i2c-davinci.c
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@ -646,6 +646,41 @@ static int davinci_i2c_remove(struct platform_device *pdev)
return 0; 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 */ /* work with hotplug and coldplug */
MODULE_ALIAS("platform:i2c_davinci"); MODULE_ALIAS("platform:i2c_davinci");
@ -655,6 +690,7 @@ static struct platform_driver davinci_i2c_driver = {
.driver = { .driver = {
.name = "i2c_davinci", .name = "i2c_davinci",
.owner = THIS_MODULE, .owner = THIS_MODULE,
.pm = davinci_i2c_pm_ops,
}, },
}; };