diff options
| author | Bob Moore <robert.moore@intel.com> | 2013-03-08 10:22:14 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-03-12 00:45:04 +0100 |
| commit | c39660b232c5e4aee3cded5a02d28e71ca447fb8 (patch) | |
| tree | 6b7cee9e3520270c28eb1d347eb127d0130ed303 /drivers/acpi | |
| parent | ACPICA: Add parens within macros around parameter names (diff) | |
| download | linux-c39660b232c5e4aee3cded5a02d28e71ca447fb8.tar.xz linux-c39660b232c5e4aee3cded5a02d28e71ca447fb8.zip | |
ACPICA: Update for ACPI 5 hardware-reduced feature
Ensure that AcpiEnable and AcpiDisable work properly when the
hardware-reduced flag is set in the FADT.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpica/evxfevnt.c | 12 | ||||
| -rw-r--r-- | drivers/acpi/acpica/hwacpi.c | 12 |
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/evxfevnt.c b/drivers/acpi/acpica/evxfevnt.c index d6e4e42316db..7039606a0ba8 100644 --- a/drivers/acpi/acpica/evxfevnt.c +++ b/drivers/acpi/acpica/evxfevnt.c @@ -74,6 +74,12 @@ acpi_status acpi_enable(void) return_ACPI_STATUS(AE_NO_ACPI_TABLES); } + /* If the Hardware Reduced flag is set, machine is always in acpi mode */ + + if (acpi_gbl_reduced_hardware) { + return_ACPI_STATUS(AE_OK); + } + /* Check current mode */ if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { @@ -126,6 +132,12 @@ acpi_status acpi_disable(void) ACPI_FUNCTION_TRACE(acpi_disable); + /* If the Hardware Reduced flag is set, machine is always in acpi mode */ + + if (acpi_gbl_reduced_hardware) { + return_ACPI_STATUS(AE_OK); + } + if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) { ACPI_DEBUG_PRINT((ACPI_DB_INIT, "System is already in legacy (non-ACPI) mode\n")); diff --git a/drivers/acpi/acpica/hwacpi.c b/drivers/acpi/acpica/hwacpi.c index deb3f61e2bd1..9b02a9f5b04a 100644 --- a/drivers/acpi/acpica/hwacpi.c +++ b/drivers/acpi/acpica/hwacpi.c @@ -66,6 +66,12 @@ acpi_status acpi_hw_set_mode(u32 mode) ACPI_FUNCTION_TRACE(hw_set_mode); + /* If the Hardware Reduced flag is set, machine is always in acpi mode */ + + if (acpi_gbl_reduced_hardware) { + return_ACPI_STATUS(AE_OK); + } + /* * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, * system does not support mode transition. @@ -146,6 +152,12 @@ u32 acpi_hw_get_mode(void) ACPI_FUNCTION_TRACE(hw_get_mode); + /* If the Hardware Reduced flag is set, machine is always in acpi mode */ + + if (acpi_gbl_reduced_hardware) { + return_VALUE(ACPI_SYS_MODE_ACPI); + } + /* * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, * system does not support mode transition. |