aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/acpi/events
diff options
context:
space:
mode:
authorZhang Rui <rui.zhang@intel.com>2008-06-20 09:42:47 +0800
committerAndi Kleen <andi@basil.nowhere.org>2008-07-16 23:27:04 +0200
commit71b58cbb0c30d1f78636a48c4721529449d6ea37 (patch)
treeb2271201121c7ecd4d275b19772dcc1e64575712 /drivers/acpi/events
parent9c9f6d052dc6f469431461a97d49cf9c5558b8ad (diff)
downloadkernel_samsung_espresso10-71b58cbb0c30d1f78636a48c4721529449d6ea37.zip
kernel_samsung_espresso10-71b58cbb0c30d1f78636a48c4721529449d6ea37.tar.gz
kernel_samsung_espresso10-71b58cbb0c30d1f78636a48c4721529449d6ea37.tar.bz2
ACPI: Enhance /sys/firmware/interrupts to allow enable/disable/clear from user-space
Allow users to enable/disable/clear a specific & valid GPE/Fixed Event in user space. This is useful for debugging, especially for some interrupt storm issues. All wakeup GPEs are disabled and they can not be enabled at runtime, and we mark them as invalid. All GPEs that don't have a _Lxx/_Exx method are marked as invalid. All Fixed Events that don't have an event handler are marked as invalid and they can't be enabled until an event handler is registered. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Ling Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'drivers/acpi/events')
-rw-r--r--drivers/acpi/events/evxfevnt.c18
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/acpi/events/evxfevnt.c b/drivers/acpi/events/evxfevnt.c
index 99a7502..73bfd6b 100644
--- a/drivers/acpi/events/evxfevnt.c
+++ b/drivers/acpi/events/evxfevnt.c
@@ -472,7 +472,6 @@ acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags)
}
ACPI_EXPORT_SYMBOL(acpi_clear_gpe)
-#ifdef ACPI_FUTURE_USAGE
/*******************************************************************************
*
* FUNCTION: acpi_get_event_status
@@ -489,6 +488,7 @@ ACPI_EXPORT_SYMBOL(acpi_clear_gpe)
acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status)
{
acpi_status status = AE_OK;
+ u32 value;
ACPI_FUNCTION_TRACE(acpi_get_event_status);
@@ -506,7 +506,20 @@ acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status)
status =
acpi_get_register(acpi_gbl_fixed_event_info[event].
- status_register_id, event_status);
+ enable_register_id, &value);
+ if (ACPI_FAILURE(status))
+ return_ACPI_STATUS(status);
+
+ *event_status = value;
+
+ status =
+ acpi_get_register(acpi_gbl_fixed_event_info[event].
+ status_register_id, &value);
+ if (ACPI_FAILURE(status))
+ return_ACPI_STATUS(status);
+
+ if (value)
+ *event_status |= ACPI_EVENT_FLAG_SET;
return_ACPI_STATUS(status);
}
@@ -566,7 +579,6 @@ acpi_get_gpe_status(acpi_handle gpe_device,
}
ACPI_EXPORT_SYMBOL(acpi_get_gpe_status)
-#endif /* ACPI_FUTURE_USAGE */
/*******************************************************************************
*
* FUNCTION: acpi_install_gpe_block