From 961d9120fa6f078492a1c762dd91f2c097e56c83 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 7 Jul 2008 03:32:02 +0200 Subject: PCI: Introduce platform_pci_power_manageable function Introduce function pointer platform_pci_power_manageable to be used by the platform-related code to point to a function allowing us to check if given device is power manageable by the platform. Introduce acpi_pci_power_manageable() playing that role for ACPI. Signed-off-by: Rafael J. Wysocki Signed-off-by: Jesse Barnes --- drivers/pci/pci.h | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) (limited to 'drivers/pci/pci.h') diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index e0eff35825a..0cd2e719933 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -5,10 +5,28 @@ extern int pci_create_sysfs_dev_files(struct pci_dev *pdev); extern void pci_remove_sysfs_dev_files(struct pci_dev *pdev); extern void pci_cleanup_rom(struct pci_dev *dev); -/* Firmware callbacks */ -extern pci_power_t (*platform_pci_choose_state)(struct pci_dev *dev); -extern int (*platform_pci_set_power_state)(struct pci_dev *dev, - pci_power_t state); +/** + * Firmware PM callbacks + * + * @is_manageable - returns 'true' if given device is power manageable by the + * platform firmware + * + * @set_state - invokes the platform firmware to set the device's power state + * + * @choose_state - returns PCI power state of given device preferred by the + * platform; to be used during system-wide transitions from a + * sleeping state to the working state and vice versa + * + * If given platform is generally capable of power managing PCI devices, all of + * these callbacks are mandatory. + */ +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); +}; + +extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops); 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