1 files changed, 19 insertions, 3 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index d382bdb7b560..1b34fc56067e 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -235,7 +235,7 @@ pci_find_parent_resource(const struct pci_dev *dev, struct resource *res)
  * -EIO if device does not support PCI PM.
  * 0 if we can successfully change the power state.
  */
-
+int (*platform_pci_set_power_state)(struct pci_dev *dev, pci_power_t t);
 int
 pci_set_power_state(struct pci_dev *dev, pci_power_t state)
 {
@@ -299,11 +299,20 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
                 msleep(10);
         else if (state == PCI_D2 || dev->current_state == PCI_D2)
                 udelay(200);
-        dev->current_state = state;
 
+        /*
+         * Give firmware a chance to be called, such as ACPI _PRx, _PSx
+         * Firmware method after natice method ?
+         */
+        if (platform_pci_set_power_state)
+                platform_pci_set_power_state(dev, state);
+
+        dev->current_state = state;
         return 0;
 }
 
+int (*platform_pci_choose_state)(struct pci_dev *dev, pm_message_t state);
+ 
 /**
  * pci_choose_state - Choose the power state of a PCI device
  * @dev: PCI device to be suspended
@@ -316,10 +325,17 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
 
 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state)
 {
+        int ret;
+
         if (!pci_find_capability(dev, PCI_CAP_ID_PM))
                 return PCI_D0;
 
-        switch (state) {
+        if (platform_pci_choose_state) {
+                ret = platform_pci_choose_state(dev, state);
+                if (ret >= 0)
+                        state = ret;
+        }
+        switch (state) {
         case 0: return PCI_D0;
         case 3: return PCI_D3hot;
         default: