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ACPI: Add D3 cold state

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_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>
This commit is contained in:
Lin Ming
2011-05-04 22:56:43 +08:00
committed by Len Brown
parent 61c4f2c81c
commit 28c2103dad
3 changed files with 6 additions and 3 deletions
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2
drivers/acpi/bus.c
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@@ -227,7 +227,7 @@ static int __acpi_bus_set_power(struct acpi_device *device, int state)
acpi_status status = AE_OK;
char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' };
if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3))
if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
return -EINVAL;
/* Make sure this is a valid target state */