From eb9c39d031bbcfd4005bd7e0337c3fd3909c1bf7 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Wed, 17 Dec 2008 12:10:05 -0800 Subject: [PATCH] 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 Tested-by: Joseph Chan Acked-by: "Rafael J. Wysocki" Signed-off-by: Jesse Barnes --- drivers/pci/pci.c | 20 ++++++++++++++++++++ drivers/pci/pci.h | 1 + drivers/pci/probe.c | 1 + 3 files changed, 22 insertions(+) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 7e9c0f3936dd..1b807330e500 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1285,6 +1285,26 @@ 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 diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index d1e92d83aa06..65deed8bfc06 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 2ee00962734b..303644614eea 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);