diff options
| author | Bob Moore <robert.moore@intel.com> | 2011-11-16 10:57:28 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2012-01-17 03:36:28 -0500 |
| commit | 22e5b40ab21fcac21db0ff25fbb844ffecc73a4a (patch) | |
| tree | 6fe339a8c410d2f8f2a0f844c976046d3be47e17 /drivers/acpi/acpica/evevent.c | |
| parent | 2355e10f07b2c550c671f98b68aedf323c299aeb (diff) | |
ACPI 5.0: Implement hardware-reduced option
If HW-reduced flag is set in the FADT, do not attempt to access
or initialize any ACPI hardware, including SCI and global lock.
No FACS will be present.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/acpica/evevent.c')
| -rw-r--r-- | drivers/acpi/acpica/evevent.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/evevent.c b/drivers/acpi/acpica/evevent.c index d458b041e651..1f43be470199 100644 --- a/drivers/acpi/acpica/evevent.c +++ b/drivers/acpi/acpica/evevent.c @@ -71,6 +71,12 @@ acpi_status acpi_ev_initialize_events(void) ACPI_FUNCTION_TRACE(ev_initialize_events); + /* If Hardware Reduced flag is set, there are no fixed events */ + + if (acpi_gbl_reduced_hardware) { + return_ACPI_STATUS(AE_OK); + } + /* * Initialize the Fixed and General Purpose Events. This is done prior to * enabling SCIs to prevent interrupts from occurring before the handlers @@ -111,6 +117,12 @@ acpi_status acpi_ev_install_xrupt_handlers(void) ACPI_FUNCTION_TRACE(ev_install_xrupt_handlers); + /* If Hardware Reduced flag is set, there is no ACPI h/w */ + + if (acpi_gbl_reduced_hardware) { + return_ACPI_STATUS(AE_OK); + } + /* Install the SCI handler */ status = acpi_ev_install_sci_handler(); |