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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>
hifive-unleashed-5.1
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
View File

@ -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 */

2
drivers/pci/pci-acpi.c
View File

@ -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;
}

5
include/acpi/actypes.h
View File

@ -501,8 +501,9 @@ typedef u64 acpi_integer;
#define ACPI_STATE_D1 (u8) 1
#define ACPI_STATE_D2 (u8) 2
#define ACPI_STATE_D3 (u8) 3
#define ACPI_D_STATES_MAX ACPI_STATE_D3
#define ACPI_D_STATE_COUNT 4
#define ACPI_STATE_D3_COLD (u8) 4
#define ACPI_D_STATES_MAX ACPI_STATE_D3_COLD
#define ACPI_D_STATE_COUNT 5
#define ACPI_STATE_C0 (u8) 0
#define ACPI_STATE_C1 (u8) 1