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[ACPI] pci_set_power_state() now calls

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platform_pci_set_power_state()
		and ACPI can answer

http://bugzilla.kernel.org/show_bug.cgi?id=4277

Signed-off-by: David Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
David Shaohua Li 2005-03-19 00:16:18 -05:00 committed by Len Brown
parent 0f64474b8f
commit b913100d73
4 changed files with 36 additions and 3 deletions
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8
drivers/acpi/bus.c
View File

@ -212,6 +212,12 @@ acpi_bus_set_power (
ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Device is not power manageable\n"));
return_VALUE(-ENODEV);
}
/*
* Get device's current power state if it's unknown
* This means device power state isn't initialized or previous setting failed
*/
if (device->power.state == ACPI_STATE_UNKNOWN)
acpi_bus_get_power(device->handle, &device->power.state);
if (state == device->power.state) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", state));
return_VALUE(0);
@ -231,7 +237,7 @@ acpi_bus_set_power (
* On transitions to a high-powered state we first apply power (via
* power resources) then evalute _PSx. Conversly for transitions to
* a lower-powered state.
*/
*/
if (state < device->power.state) {
if (device->power.flags.power_resources) {
result = acpi_power_transition(device, state);

19
drivers/pci/pci-acpi.c
View File

@ -253,6 +253,24 @@ static int acpi_pci_choose_state(struct pci_dev *pdev, pm_message_t state)
return -ENODEV;
}
static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
{
acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
static int state_conv[] = {
[0] = 0,
[1] = 1,
[2] = 2,
[3] = 3,
[4] = 3
};
int acpi_state = state_conv[(int __force) state];
if (!handle)
return -ENODEV;
return acpi_bus_set_power(handle, acpi_state);
}
/* ACPI bus type */
static int pci_acpi_find_device(struct device *dev, acpi_handle *handle)
{
@ -300,6 +318,7 @@ static int __init pci_acpi_init(void)
if (ret)
return 0;
platform_pci_choose_state = acpi_pci_choose_state;
platform_pci_set_power_state = acpi_pci_set_power_state;
return 0;
}
arch_initcall(pci_acpi_init);

11
drivers/pci/pci.c
View File

@ -235,7 +235,7 @@ pci_find_parent_resource(const struct pci_dev *dev, struct resource *res)
* -EIO if device does not support PCI PM.
* 0 if we can successfully change the power state.
*/
int (*platform_pci_set_power_state)(struct pci_dev *dev, pci_power_t t) = NULL;
int
pci_set_power_state(struct pci_dev *dev, pci_power_t state)
{
@ -299,8 +299,15 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
msleep(10);
else if (state == PCI_D2 || dev->current_state == PCI_D2)
udelay(200);
dev->current_state = state;
/*
* Give firmware a chance to be called, such as ACPI _PRx, _PSx
* Firmware method after natice method ?
*/
if (platform_pci_set_power_state)
platform_pci_set_power_state(dev, state);
dev->current_state = state;
return 0;
}

1
drivers/pci/pci.h
View File

@ -13,6 +13,7 @@ extern int pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
void *alignf_data);
/* Firmware callbacks */
extern int (*platform_pci_choose_state)(struct pci_dev *dev, pm_message_t state);
extern int (*platform_pci_set_power_state)(struct pci_dev *dev, pci_power_t state);
/* PCI /proc functions */
#ifdef CONFIG_PROC_FS