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 --- include/linux/pm_wakeup.h | 26 ++++++-------------------- 1 file changed, 6 insertions(+), 20 deletions(-) (limited to 'include/linux') diff --git a/include/linux/pm_wakeup.h b/include/linux/pm_wakeup.h index f0d0b2cb8d2..3af0c8d05cd 100644 --- a/include/linux/pm_wakeup.h +++ b/include/linux/pm_wakeup.h @@ -35,6 +35,11 @@ static inline void device_init_wakeup(struct device *dev, int val) dev->power.can_wakeup = dev->power.should_wakeup = !!val; } +static inline void device_set_wakeup_capable(struct device *dev, int val) +{ + dev->power.can_wakeup = !!val; +} + static inline int device_can_wakeup(struct device *dev) { return dev->power.can_wakeup; @@ -47,21 +52,7 @@ static inline void device_set_wakeup_enable(struct device *dev, int val) static inline int device_may_wakeup(struct device *dev) { - return dev->power.can_wakeup & dev->power.should_wakeup; -} - -/* - * Platform hook to activate device wakeup capability, if that's not already - * handled by enable_irq_wake() etc. - * Returns zero on success, else negative errno - */ -extern int (*platform_enable_wakeup)(struct device *dev, int is_on); - -static inline int call_platform_enable_wakeup(struct device *dev, int is_on) -{ - if (platform_enable_wakeup) - return (*platform_enable_wakeup)(dev, is_on); - return 0; + return dev->power.can_wakeup && dev->power.should_wakeup; } #else /* !CONFIG_PM */ @@ -80,11 +71,6 @@ static inline int device_can_wakeup(struct device *dev) #define device_set_wakeup_enable(dev, val) do {} while (0) #define device_may_wakeup(dev) 0 -static inline int call_platform_enable_wakeup(struct device *dev, int is_on) -{ - return 0; -} - #endif /* !CONFIG_PM */ #endif /* _LINUX_PM_WAKEUP_H */ -- cgit v1.2.3-70-g09d2