Subject: [PATCH] [acpi driver events] Add infrastructure for fixed events

- Add fields to struct acpi_device_event
  - e_fixed[], an array of u32 events that should be listened for
  - e_num_fixed, the number of events
  - e_fixed_event, the event to pass down to the generic event
    handler.

- Add acpi_device_event_fixed() declaration macro

Signed-off-by: Patrick Mochel <mochel@linux.intel.com>

---

 include/acpi/event.h |   33 +++++++++++++++++++++++++++++++++
 1 files changed, 33 insertions(+), 0 deletions(-)

applies-to: 315e54ac73df771cfcfc6777ccea0d931dd4a10e
452281fac54c1999a26734dd45de42e1edd1f0f7
diff --git a/include/acpi/event.h b/include/acpi/event.h
index b48a408..9413600 100644
--- a/include/acpi/event.h
+++ b/include/acpi/event.h
@@ -4,6 +4,10 @@
 struct acpi_device_event {
 	u32			e_type;
 	acpi_notify_handler	e_handler;
+
+	u32			e_num_fixed;
+	u32			* e_fixed;
+	u32			e_fixed_event;
 };
 
 
@@ -28,6 +32,35 @@ struct acpi_device_event __name##_event 
 
 
 /**
+ *	This macro should be used by drivers that want to 
+ *	install a handler for a fixed event, and optionally
+ *	a regular event (for control method-based devices).
+ *
+ *	This follows the same rules as acpi_device_event()
+ *	above, but also requires that the driver declare an
+ *	array of fixed events (of type 'u32') that for which
+ *	an internal handler is registered. 
+ *
+ *	The second parameter is the event that is passed to
+ *	the notify handler (->e_handler()) when the fixed 
+ *	event is raised.
+ *
+ *	For an example, please see the button driver, which
+ *	is one of the devices that can actually generate fixed
+ *	events.
+ */
+
+#define acpi_device_event_fixed(__name, __event)	\
+struct acpi_device_event __name##_event = {		\
+	.e_type		= ACPI_DEVICE_NOTIFY,		\
+	.e_handler	= __name##_notify,		\
+	.e_num_fixed	= ARRAY_SIZE(__name##_fixed),	\
+	.e_fixed	= __name##_fixed,		\
+	.e_fixed_event	= __event,			\
+}
+
+
+/**
  *	This macro should be used by drivers that do not 
  *	have any event handlers to register.
  *	(It's still defined, but as an empty structure.)
---
0.99.9.GIT