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| author | Jesse Barnes <jbarnes@virtuousgeek.org> | 2008-12-17 12:10:05 -0800 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-01-07 11:13:07 -0800 |
| commit | eb9c39d031bbcfd4005bd7e0337c3fd3909c1bf7 (patch) | |
| tree | 1549b3fb7eb08296b7f7fe72582d7067098059db /drivers/pci | |
| parent | 876e501ab25dcd683574a5d3d56d8fe450083ed6 (diff) | |
| download | kernel_samsung_smdk4412-eb9c39d031bbcfd4005bd7e0337c3fd3909c1bf7.tar.gz kernel_samsung_smdk4412-eb9c39d031bbcfd4005bd7e0337c3fd3909c1bf7.tar.bz2 kernel_samsung_smdk4412-eb9c39d031bbcfd4005bd7e0337c3fd3909c1bf7.zip | |
PCI: set device wakeup capable flag if platform support is present
When PCI devices are initialized, we check whether they support PCI PM
caps and set the device can_wakeup flag if so. However, some devices
may have platform provided wakeup events rather than PCI PME signals, so
we need to set can_wakeup in that case too. Doing so should allow
wakeups from many more devices, especially on cost constrained systems.
Reported-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Joseph Chan <JosephChan@via.com.tw>
Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pci.c | 20 | ||||
| -rw-r--r-- | drivers/pci/pci.h | 1 | ||||
| -rw-r--r-- | drivers/pci/probe.c | 1 |
3 files changed, 22 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 7e9c0f3936d..1b807330e50 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1286,6 +1286,26 @@ void pci_pm_init(struct pci_dev *dev) } /** + * platform_pci_wakeup_init - init platform wakeup if present + * @dev: PCI device + * + * Some devices don't have PCI PM caps but can still generate wakeup + * events through platform methods (like ACPI events). If @dev supports + * platform wakeup events, set the device flag to indicate as much. This + * may be redundant if the device also supports PCI PM caps, but double + * initialization should be safe in that case. + */ +void platform_pci_wakeup_init(struct pci_dev *dev) +{ + if (!platform_pci_can_wakeup(dev)) + return; + + device_set_wakeup_capable(&dev->dev, true); + device_set_wakeup_enable(&dev->dev, false); + platform_pci_sleep_wake(dev, false); +} + +/** * pci_add_save_buffer - allocate buffer for saving given capability registers * @dev: the PCI device * @cap: the capability to allocate the buffer for diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index d1e92d83aa0..65deed8bfc0 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -45,6 +45,7 @@ struct pci_platform_pm_ops { extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops); extern void pci_pm_init(struct pci_dev *dev); +extern void platform_pci_wakeup_init(struct pci_dev *dev); extern void pci_allocate_cap_save_buffers(struct pci_dev *dev); extern int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val); diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 2ee00962734..303644614ee 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -965,6 +965,7 @@ static void pci_init_capabilities(struct pci_dev *dev) /* Power Management */ pci_pm_init(dev); + platform_pci_wakeup_init(dev); /* Vital Product Data */ pci_vpd_pci22_init(dev); |