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ACPI: Fix D3hot v D3cold confusion

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Before this patch, ACPI_STATE_D3 incorrectly referenced D3hot
in some places, but D3cold in other places.

After this patch, ACPI_STATE_D3 always means ACPI_STATE_D3_COLD;
and all references to D3hot use ACPI_STATE_D3_HOT.

ACPI's _PR3 method is used to enter both D3hot and D3cold states.
What distinguishes D3hot from D3cold is the presence _PR3
(Power Resources for D3hot)  If these resources are all ON,
then the state is D3hot.  If _PR3 is not present,
or all _PR0 resources for the devices are OFF,
then the state is D3cold.

This patch applies after Linux-3.4-rc1.
A future syntax cleanup may remove ACPI_STATE_D3
to emphasize that it always means ACPI_STATE_D3_COLD.

Signed-off-by: Lin Ming <[email protected]>
Acked-by: Rafael J. Wysocki <[email protected]>
Reviewed-by: Aaron Lu <[email protected]>
Signed-off-by: Len Brown <[email protected]>
This commit is contained in:
Lin Ming 2012-04-23 09:03:49 +08:00 • committed by Len Brown
commit 1cc0c998fd
4 changed files with 14 additions and 16 deletions
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7
include/acpi/actypes.h
View file

@ -499,9 +499,10 @@ typedef u64 acpi_integer;
#define ACPI_STATE_D0 (u8) 0
#define ACPI_STATE_D1 (u8) 1
#define ACPI_STATE_D2 (u8) 2
#define ACPI_STATE_D3 (u8) 3
#define ACPI_STATE_D3_COLD (u8) 4
#define ACPI_D_STATES_MAX ACPI_STATE_D3_COLD
#define ACPI_STATE_D3_HOT (u8) 3
#define ACPI_STATE_D3 (u8) 4
#define ACPI_STATE_D3_COLD ACPI_STATE_D3
#define ACPI_D_STATES_MAX ACPI_STATE_D3
#define ACPI_D_STATE_COUNT 5
#define ACPI_STATE_C0 (u8) 0