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path: root/drivers/pci/pci.c
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Diffstat (limited to 'drivers/pci/pci.c')
-rw-r--r--drivers/pci/pci.c28
1 files changed, 19 insertions, 9 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index f04b9ffe415..1b34fc56067 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:
@@ -334,10 +350,6 @@ EXPORT_SYMBOL(pci_choose_state);
/**
* pci_save_state - save the PCI configuration space of a device before suspending
* @dev: - PCI device that we're dealing with
- * @buffer: - buffer to hold config space context
- *
- * @buffer must be large enough to hold the entire PCI 2.2 config space
- * (>= 64 bytes).
*/
int
pci_save_state(struct pci_dev *dev)
@@ -352,8 +364,6 @@ pci_save_state(struct pci_dev *dev)
/**
* pci_restore_state - Restore the saved state of a PCI device
* @dev: - PCI device that we're dealing with
- * @buffer: - saved PCI config space
- *
*/
int
pci_restore_state(struct pci_dev *dev)