diff options
author | Lin Ming <ming.m.lin@intel.com> | 2010-12-13 13:39:26 +0800 |
---|---|---|
committer | Len Brown <len.brown@intel.com> | 2011-01-12 04:27:00 -0500 |
commit | a0fcdb237fcd4eaa7e5009b28ef5be07415f287d (patch) | |
tree | d07a4950648ad9a7eaab8fd28b37685926bb23a9 /drivers/acpi/acpica/evxface.c | |
parent | bba63a296ffab20e08d9e8252d2f0d99050ac859 (diff) |
ACPICA: Global event handler
The global event handler is called whenever a general purpose
or fixed ACPI event occurs.
Also update Linux OSL to collect events counter with
global event handler.
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/evxface.c')
-rw-r--r-- | drivers/acpi/acpica/evxface.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c index d193b905dfa2..1226689bdb1b 100644 --- a/drivers/acpi/acpica/evxface.c +++ b/drivers/acpi/acpica/evxface.c @@ -92,6 +92,57 @@ acpi_status acpi_install_exception_handler(acpi_exception_handler handler) ACPI_EXPORT_SYMBOL(acpi_install_exception_handler) #endif /* ACPI_FUTURE_USAGE */ + +/******************************************************************************* + * + * FUNCTION: acpi_install_global_event_handler + * + * PARAMETERS: Handler - Pointer to the global event handler function + * Context - Value passed to the handler on each event + * + * RETURN: Status + * + * DESCRIPTION: Saves the pointer to the handler function. The global handler + * is invoked upon each incoming GPE and Fixed Event. It is + * invoked at interrupt level at the time of the event dispatch. + * Can be used to update event counters, etc. + * + ******************************************************************************/ +acpi_status +acpi_install_global_event_handler(ACPI_GBL_EVENT_HANDLER handler, void *context) +{ + acpi_status status; + + ACPI_FUNCTION_TRACE(acpi_install_global_event_handler); + + /* Parameter validation */ + + if (!handler) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Don't allow two handlers. */ + + if (acpi_gbl_global_event_handler) { + status = AE_ALREADY_EXISTS; + goto cleanup; + } + + acpi_gbl_global_event_handler = handler; + acpi_gbl_global_event_handler_context = context; + + cleanup: + (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); + return_ACPI_STATUS(status); +} + +ACPI_EXPORT_SYMBOL(acpi_install_global_event_handler) + /******************************************************************************* * * FUNCTION: acpi_install_fixed_event_handler |