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authorShaohua Li <shaohua.li@intel.com>2007-07-20 10:03:22 +0800
committerLen Brown <len.brown@intel.com>2007-07-22 04:18:32 -0400
commitab826ca4cf2fe8ebcfd21189ca8bfeb47ca88359 (patch)
treefe98e808f9b593580979308a48d52184e59d734c /drivers/pci/pci-acpi.c
parentfc30e68e88baf463683bde43347756889ba2ffae (diff)
ACPI: Use ACPI methods to select PCI device suspend state
applied after Rafel's 'PM: Update global suspend and hibernation operations framework' patch set Signed-off-by: Shaohua Li<shaohua.li@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/pci/pci-acpi.c')
-rw-r--r--drivers/pci/pci-acpi.c24
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index c8062494009f..5e866b94bcab 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -245,11 +245,27 @@ EXPORT_SYMBOL(pci_osc_control_set);
* currently we simply return _SxD, if present.
*/
-static int acpi_pci_choose_state(struct pci_dev *pdev, pm_message_t state)
+static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev,
+ pm_message_t state)
{
- /* TBD */
-
- return -ENODEV;
+ int acpi_state;
+
+ acpi_state = acpi_pm_device_sleep_state(&pdev->dev,
+ device_may_wakeup(&pdev->dev), NULL);
+ if (acpi_state < 0)
+ return PCI_POWER_ERROR;
+
+ switch (acpi_state) {
+ case ACPI_STATE_D0:
+ return PCI_D0;
+ case ACPI_STATE_D1:
+ return PCI_D1;
+ case ACPI_STATE_D2:
+ return PCI_D2;
+ case ACPI_STATE_D3:
+ return PCI_D3hot;
+ }
+ return PCI_POWER_ERROR;
}
static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)