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i2c: mediatek: Enable i2c module clock before i2c registers access. 

Make sure i2c module clock has been enabled before i2c registers
access.

Signed-off-by: Jun Gao <jun.gao@mediatek.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Jun Gao 2017-12-19 14:51:03 +08:00 committed by Wolfram Sang
parent 5a10e7d7aa
commit f6762cedbe
1 changed files with 9 additions and 0 deletions
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9
drivers/i2c/busses/i2c-mt65xx.c
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@ -861,10 +861,19 @@ static int mtk_i2c_remove(struct platform_device *pdev)
#ifdef CONFIG_PM_SLEEP
static int mtk_i2c_resume(struct device *dev)
{
int ret;
struct mtk_i2c *i2c = dev_get_drvdata(dev);
ret = mtk_i2c_clock_enable(i2c);
if (ret) {
dev_err(dev, "clock enable failed!\n");
return ret;
}
mtk_i2c_init_hw(i2c);
mtk_i2c_clock_disable(i2c);
return 0;
}
#endif