PCI: Introduce platform_pci_power_manageable function
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>
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 8e8ecc1da9..f807452 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -376,7 +376,32 @@
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 @@
* 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 @@
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 @@
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: