diff options
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 40 |
1 files changed, 30 insertions, 10 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 8e8ecc1da93..f8074525267 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -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: |