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i2c: mediatek: add i2c resume support

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mt65xx i2c controller initial setting will be cleared after system suspend,
so we should init mt65xx i2c controller again when system resume.

Signed-off-by: Liguo Zhang <liguo.zhang@mediatek.com>
Signed-off-by: Eddie Huang <eddie.huang@mediatek.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Liguo Zhang 2015-10-06 17:22:56 +08:00 committed by Wolfram Sang
parent 1c4b6c3bcf
commit 09027e08ac
1 changed files with 16 additions and 0 deletions
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16
drivers/i2c/busses/i2c-mt65xx.c
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@ -728,11 +728,27 @@ static int mtk_i2c_remove(struct platform_device *pdev)
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int mtk_i2c_resume(struct device *dev)
{
struct mtk_i2c *i2c = dev_get_drvdata(dev);
mtk_i2c_init_hw(i2c);
return 0;
}
#endif
static const struct dev_pm_ops mtk_i2c_pm = {
SET_SYSTEM_SLEEP_PM_OPS(NULL, mtk_i2c_resume)
};
static struct platform_driver mtk_i2c_driver = {
.probe = mtk_i2c_probe,
.remove = mtk_i2c_remove,
.driver = {
.name = I2C_DRV_NAME,
.pm = &mtk_i2c_pm,
.of_match_table = of_match_ptr(mtk_i2c_of_match),
},
};