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PCI: Introduce platform_pci_power_manageable function

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Introduce function pointer platform_pci_power_manageable to be used
by the platform-related code to point to a function allowing us to
check if given device is power manageable by the platform.

Introduce acpi_pci_power_manageable() playing that role for ACPI.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Rafael J. Wysocki
2008-07-07 03:32:02 +02:00
committed by Jesse Barnes
parent 3737b2b104
commit 961d9120fa
3 changed files with 65 additions and 20 deletions
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40
drivers/pci/pci.c
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@@ -376,7 +376,32 @@ pci_restore_bars(struct pci_dev *dev)
pci_update_resource(dev, &dev->resource[i], i);
}
int (*platform_pci_set_power_state)(struct pci_dev *dev, pci_power_t t);
static struct pci_platform_pm_ops *pci_platform_pm;
int pci_set_platform_pm(struct pci_platform_pm_ops *ops)
{
if (!ops->is_manageable || !ops->set_state || !ops->choose_state)
return -EINVAL;
pci_platform_pm = ops;
return 0;
}
static inline bool platform_pci_power_manageable(struct pci_dev *dev)
{
return pci_platform_pm ? pci_platform_pm->is_manageable(dev) : false;
}
static inline int platform_pci_set_power_state(struct pci_dev *dev,
pci_power_t t)
{
return pci_platform_pm ? pci_platform_pm->set_state(dev, t) : -ENOSYS;
}
static inline pci_power_t platform_pci_choose_state(struct pci_dev *dev)
{
return pci_platform_pm ?
pci_platform_pm->choose_state(dev) : PCI_POWER_ERROR;
}
/**
* pci_set_power_state - Set the power state of a PCI device
@@ -479,8 +504,7 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
* Give firmware a chance to be called, such as ACPI _PRx, _PSx
* Firmware method after native method ?
*/
if (platform_pci_set_power_state)
platform_pci_set_power_state(dev, state);
platform_pci_set_power_state(dev, state);
dev->current_state = state;
@@ -505,8 +529,6 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
return 0;
}
pci_power_t (*platform_pci_choose_state)(struct pci_dev *dev);
/**
* pci_choose_state - Choose the power state of a PCI device
* @dev: PCI device to be suspended
@@ -524,11 +546,9 @@ pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state)
if (!pci_find_capability(dev, PCI_CAP_ID_PM))
return PCI_D0;
if (platform_pci_choose_state) {
ret = platform_pci_choose_state(dev);
if (ret != PCI_POWER_ERROR)
return ret;
}
ret = platform_pci_choose_state(dev);
if (ret != PCI_POWER_ERROR)
return ret;
switch (state.event) {
case PM_EVENT_ON: