i2c: designware: Disable device on system suspend

Userspace can initiate system suspend on arbitrary times which means that
device drivers must make sure that their device gets quiesced before system
suspend is entered. Therefore disable the I2C host controller in the driver
system suspend hook.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 9c7802614342c5a98a62622c4511be336c9c1017..f72102f389c5b7bbd01416d7fe271a71af29e896 100644 (file)
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -253,6 +253,7 @@ static int dw_i2c_suspend(struct device *dev)
        struct platform_device *pdev = to_platform_device(dev);
        struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev);
 
+       i2c_dw_disable(i_dev);
        clk_disable_unprepare(i_dev->clk);
 
        return 0;