[ACPI] generic Hot Key support

See Documentation/acpi-hotkey.txt

Use cmdline "acpi_specific_hotkey" to enable
legacy platform specific drivers.

http://bugzilla.kernel.org/show_bug.cgi?id=3887

Signed-off-by: Luming Yu <luming.yu@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 5a9128de6226..bdd9f37f8101 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -71,6 +71,9 @@ EXPORT_SYMBOL(acpi_in_debugger);
 extern char line_buf[80];
 #endif /*ENABLE_DEBUGGER*/
 
+int acpi_specific_hotkey_enabled;
+EXPORT_SYMBOL(acpi_specific_hotkey_enabled);
+
 static unsigned int acpi_irq_irq;
 static acpi_osd_handler acpi_irq_handler;
 static void *acpi_irq_context;
@@ -1152,6 +1155,15 @@ acpi_wake_gpes_always_on_setup(char *str)
 
 __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup);
 
+int __init
+acpi_hotkey_setup(char *str)
+{
+        acpi_specific_hotkey_enabled = TRUE;
+        return 1;
+}
+
+__setup("acpi_specific_hotkey", acpi_hotkey_setup);
+
 /*
  * max_cstate is defined in the base kernel so modules can
  * change it w/o depending on the state of the processor module.