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powerpc/vio: Add power management support

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Adds support for suspend/resume for VIO devices. This is needed for
support for HMC initiated hibernation.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2010-04-07 18:09:15 +10:00
parent 8260cf6f40
commit a32aaf1451
1 changed files with 24 additions and 0 deletions
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24
arch/powerpc/kernel/vio.c
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@ -1381,6 +1381,29 @@ static int vio_hotplug(struct device *dev, struct kobj_uevent_env *env)
return 0;
}
static int vio_pm_suspend(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
if (pm && pm->suspend)
return pm->suspend(dev);
return 0;
}
static int vio_pm_resume(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
if (pm && pm->resume)
return pm->resume(dev);
return 0;
}
const struct dev_pm_ops vio_dev_pm_ops = {
.suspend = vio_pm_suspend,
.resume = vio_pm_resume,
};
static struct bus_type vio_bus_type = {
.name = "vio",
.dev_attrs = vio_dev_attrs,
@ -1388,6 +1411,7 @@ static struct bus_type vio_bus_type = {
.match = vio_bus_match,
.probe = vio_bus_probe,
.remove = vio_bus_remove,
.pm = &vio_dev_pm_ops,
};
/**