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authorLin Ming <ming.m.lin@intel.com>2011-05-04 22:56:43 +0800
committerLen Brown <len.brown@intel.com>2011-05-29 02:21:08 -0400
commit28c2103dad04dba29ba86e22dad5735db8f0e13c (patch)
tree7bdd422ae53e4f48bdaa48e1d83e6c25a1ee56e4 /drivers/pci
parent61c4f2c81c61f73549928dfd9f3e8f26aa36a8cf (diff)
downloadop-kernel-dev-28c2103dad04dba29ba86e22dad5735db8f0e13c.zip
op-kernel-dev-28c2103dad04dba29ba86e22dad5735db8f0e13c.tar.gz
ACPI: Add D3 cold state
_SxW returns an Integer containing the lowest D-state supported in state Sx. If OSPM has not indicated that it supports _PR3, then the value “3” corresponds to D3. If it has indicated _PR3 support, the value “3” represents D3hot and the value “4” represents D3cold. Linux does set _OSC._PR3, so we should fix it to expect that _SxW can return 4. Signed-off-by: Lin Ming <ming.m.lin@intel.com> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/pci-acpi.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 7c3b18e..d36f41e 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -195,6 +195,8 @@ static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)
return PCI_D2;
case ACPI_STATE_D3:
return PCI_D3hot;
+ case ACPI_STATE_D3_COLD:
+ return PCI_D3cold;
}
return PCI_POWER_ERROR;
}
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