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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>
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1 changed files with 36 additions and 0 deletions
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@ -646,6 +646,41 @@ static int davinci_i2c_remove(struct platform_device *pdev)
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return 0;
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}
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#ifdef CONFIG_PM
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static int davinci_i2c_suspend(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct davinci_i2c_dev *i2c_dev = platform_get_drvdata(pdev);
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/* put I2C into reset */
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davinci_i2c_reset_ctrl(i2c_dev, 0);
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clk_disable(i2c_dev->clk);
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return 0;
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}
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static int davinci_i2c_resume(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct davinci_i2c_dev *i2c_dev = platform_get_drvdata(pdev);
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clk_enable(i2c_dev->clk);
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/* take I2C out of reset */
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davinci_i2c_reset_ctrl(i2c_dev, 1);
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return 0;
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}
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static const struct dev_pm_ops davinci_i2c_pm = {
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.suspend = davinci_i2c_suspend,
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.resume = davinci_i2c_resume,
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};
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#define davinci_i2c_pm_ops (&davinci_i2c_pm)
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#else
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#define davinci_i2c_pm_ops NULL
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#endif
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/* work with hotplug and coldplug */
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MODULE_ALIAS("platform:i2c_davinci");
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@ -655,6 +690,7 @@ static struct platform_driver davinci_i2c_driver = {
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.driver = {
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.name = "i2c_davinci",
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.owner = THIS_MODULE,
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.pm = davinci_i2c_pm_ops,
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},
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};
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