From eb9d0fe40e313c0a74115ef456a2e43a6c8da72f Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 7 Jul 2008 03:34:48 +0200 Subject: 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 Signed-off-by: Jesse Barnes --- drivers/pci/pci.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/pci/pci.h') diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 0cd2e719933b..b08dfc9746af 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -17,6 +17,11 @@ extern void pci_cleanup_rom(struct pci_dev *dev); * platform; to be used during system-wide transitions from a * sleeping state to the working state and vice versa * + * @can_wakeup - returns 'true' if given device is capable of waking up the + * system from a sleeping state + * + * @sleep_wake - enables/disables the system wake up capability of given device + * * If given platform is generally capable of power managing PCI devices, all of * these callbacks are mandatory. */ @@ -24,9 +29,12 @@ struct pci_platform_pm_ops { bool (*is_manageable)(struct pci_dev *dev); int (*set_state)(struct pci_dev *dev, pci_power_t state); pci_power_t (*choose_state)(struct pci_dev *dev); + bool (*can_wakeup)(struct pci_dev *dev); + int (*sleep_wake)(struct pci_dev *dev, bool enable); }; extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops); +extern void pci_pm_init(struct pci_dev *dev); extern int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val); extern int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val); -- cgit v1.2.3