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PCI: Introduce platform_pci_power_manageable function

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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 <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Rafael J. Wysocki
2008-07-07 03:32:02 +02:00
committed by Jesse Barnes
parent 3737b2b104
commit 961d9120fa
3 changed files with 65 additions and 20 deletions
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19
drivers/pci/pci-acpi.c
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@@ -215,7 +215,6 @@ acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
}
EXPORT_SYMBOL(pci_osc_control_set);
#ifdef CONFIG_ACPI_SLEEP
/*
* _SxD returns the D-state with the highest power
* (lowest D-state number) supported in the S-state "x".
@@ -259,7 +258,13 @@ static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)
}
return PCI_POWER_ERROR;
}
#endif
static bool acpi_pci_power_manageable(struct pci_dev *dev)
{
acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
return handle ? acpi_bus_power_manageable(handle) : false;
}
static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
{
@@ -290,6 +295,11 @@ static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
return -EINVAL;
}
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,
};
/* ACPI bus type */
static int acpi_pci_find_device(struct device *dev, acpi_handle *handle)
@@ -341,10 +351,7 @@ static int __init acpi_pci_init(void)
ret = register_acpi_bus_type(&acpi_pci_bus);
if (ret)
return 0;
#ifdef CONFIG_ACPI_SLEEP
platform_pci_choose_state = acpi_pci_choose_state;
#endif
platform_pci_set_power_state = acpi_pci_set_power_state;
pci_set_platform_pm(&acpi_pci_platform_pm);
return 0;
}
arch_initcall(acpi_pci_init);