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authorRafael J. Wysocki <rjw@sisk.pl>2008-08-18 15:38:00 -0400
committerJesse Barnes <jbarnes@virtuousgeek.org>2008-10-20 13:53:41 -0400
commit0235c4fc7fc6f621dc0dd89eba102ad5aa373390 (patch)
tree8947ae0efda2a1c9d69f3b6399d3e847307786a5 /include/linux/pci.h
parent3d137310245e4cdc3e8c8ba1bea2e145a87ae8e3 (diff)
PCI PM: Introduce function pci_wake_from_d3
Many device drivers use the following sequence of statements to enable the device to wake up the system while being in the D3_hot or D3_cold low power state: pci_enable_wake(pdev, PCI_D3hot, 1); pci_enable_wake(pdev, PCI_D3cold, 1); However, the second call is not necessary if the first one succeeds (the ordering of the statements above doesn't matter here) and it may even be harmful, because we are not supposed to enable PME# after the wake-up power has been enabled for the device. To allow drivers to overcome this problem, introduce function pci_wake_from_d3() that will enable the device to wake up the system from any of D3_hot and D3_cold as long as the wake-up from at least one of them is supported. Acked-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'include/linux/pci.h')
-rw-r--r--include/linux/pci.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h
index c989f58d09bf..f7e7dbc09194 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -644,6 +644,7 @@ pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
644bool pci_pme_capable(struct pci_dev *dev, pci_power_t state); 644bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
645void pci_pme_active(struct pci_dev *dev, bool enable); 645void pci_pme_active(struct pci_dev *dev, bool enable);
646int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable); 646int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);
647int pci_wake_from_d3(struct pci_dev *dev, bool enable);
647pci_power_t pci_target_state(struct pci_dev *dev); 648pci_power_t pci_target_state(struct pci_dev *dev);
648int pci_prepare_to_sleep(struct pci_dev *dev); 649int pci_prepare_to_sleep(struct pci_dev *dev);
649int pci_back_from_sleep(struct pci_dev *dev); 650int pci_back_from_sleep(struct pci_dev *dev);