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authorRafael J. Wysocki <rjw@sisk.pl>2008-07-07 03:34:48 +0200
committerJesse Barnes <jbarnes@virtuousgeek.org>2008-07-07 16:26:28 -0700
commiteb9d0fe40e313c0a74115ef456a2e43a6c8da72f (patch)
tree7a90a68b8dc152d49a38469fd6a6a7840954bac2 /drivers/pci/pci-acpi.c
parent0af4b8c4fb31193dc666f4893107a18fef82baab (diff)
PCI ACPI: Rework PCI handling of wake-up
* Introduce function acpi_pm_device_sleep_wake() for enabling and disabling the system wake-up capability of devices that are power manageable by ACPI. * Introduce function acpi_bus_can_wakeup() allowing other (dependent) subsystems to check if ACPI is able to enable the system wake-up capability of given device. * Introduce callback .sleep_wake() in struct pci_platform_pm_ops and for the ACPI PCI 'driver' make it use acpi_pm_device_sleep_wake(). * Introduce callback .can_wakeup() in struct pci_platform_pm_ops and for the ACPI 'driver' make it use acpi_bus_can_wakeup(). * Move the PME# handlig code out of pci_enable_wake() and split it into two functions, pci_pme_capable() and pci_pme_active(), allowing the caller to check if given device is capable of generating PME# from given power state and to enable/disable the device's PME# functionality, respectively. * Modify pci_enable_wake() to use the new ACPI callbacks and the new PME#-related functions. * Drop the generic .platform_enable_wakeup() callback that is not used any more. * Introduce device_set_wakeup_capable() that will set the power.can_wakeup flag of given device. * Rework PCI device PM initialization so that, if given device is capable of generating wake-up events, either natively through the PME# mechanism, or with the help of the platform, its power.can_wakeup flag is set and its power.should_wakeup flag is unset as appropriate. * Make ACPI set the power.can_wakeup flag for devices found to be wake-up capable by it. * Make the ACPI wake-up code enable/disable GPEs for devices that have the wakeup.flags.prepared flag set (which means that their wake-up power has been enabled). Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/pci-acpi.c')
-rw-r--r--drivers/pci/pci-acpi.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 6bc0d8c870a..7764768b6a0 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -299,10 +299,30 @@ static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
return error;
}
+static bool acpi_pci_can_wakeup(struct pci_dev *dev)
+{
+ acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
+
+ return handle ? acpi_bus_can_wakeup(handle) : false;
+}
+
+static int acpi_pci_sleep_wake(struct pci_dev *dev, bool enable)
+{
+ int error = acpi_pm_device_sleep_wake(&dev->dev, enable);
+
+ if (!error)
+ dev_printk(KERN_INFO, &dev->dev,
+ "wake-up capability %s by ACPI\n",
+ enable ? "enabled" : "disabled");
+ return error;
+}
+
static struct pci_platform_pm_ops acpi_pci_platform_pm = {
.is_manageable = acpi_pci_power_manageable,
.set_state = acpi_pci_set_power_state,
.choose_state = acpi_pci_choose_state,
+ .can_wakeup = acpi_pci_can_wakeup,
+ .sleep_wake = acpi_pci_sleep_wake,
};
/* ACPI bus type */