openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

i2c: ismt: PCI core handles power state for us 

There is no need to repeat the work that is already done in the PCI driver
core. Remove suspend and resume callbacks.

Note that there is no more calls performed to enable or disable a PCI
device during suspend-resume cycle. Nowadays they seems to be
superfluous. Someone can read more in [1].

[1] https://www.kernel.org/doc/ols/2009/ols2009-pages-319-330.pdf

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Andy Shevchenko 2015-09-16 17:23:59 +03:00 committed by Wolfram Sang
parent 600ca08023
commit fb8918b2cf
1 changed files with 0 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/i2c/busses/i2c-ismt.c
View File

@ -947,44 +947,11 @@ static void ismt_remove(struct pci_dev *pdev)
i2c_del_adapter(&priv->adapter);
}
/**
* ismt_suspend() - place the device in suspend
* @pdev: PCI-Express device
* @mesg: PM message
*/
#ifdef CONFIG_PM
static int ismt_suspend(struct pci_dev *pdev, pm_message_t mesg)
{
pci_save_state(pdev);
pci_set_power_state(pdev, pci_choose_state(pdev, mesg));
return 0;
}
/**
* ismt_resume() - PCI resume code
* @pdev: PCI-Express device
*/
static int ismt_resume(struct pci_dev *pdev)
{
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
return pci_enable_device(pdev);
}
#else
#define ismt_suspend NULL
#define ismt_resume NULL
#endif
static struct pci_driver ismt_driver = {
.name = "ismt_smbus",
.id_table = ismt_ids,
.probe = ismt_probe,
.remove = ismt_remove,
.suspend = ismt_suspend,
.resume = ismt_resume,
};
module_pci_driver(ismt_driver);