Subject: [PATCH] [acpi driver model] Add interface for adding device events

- Create drivers/acpi/drivers/core/event.c and implement
  acpi_device_event_{add,remove}.

- Make sure it gets built with the core.

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

---

 drivers/acpi/drivers/core/Makefile |    2 +
 drivers/acpi/drivers/core/event.c  |   62 ++++++++++++++++++++++++++++++++++++
 drivers/acpi/drivers/core/event.h  |    9 +++++
 3 files changed, 72 insertions(+), 1 deletions(-)
 create mode 100644 drivers/acpi/drivers/core/event.c
 create mode 100644 drivers/acpi/drivers/core/event.h

applies-to: 22963cb20674717c67c6f1803ba0cca9ac29869c
97225015529c334c84b6e109caa1b7ff7d460b92
diff --git a/drivers/acpi/drivers/core/Makefile b/drivers/acpi/drivers/core/Makefile
index da56506..b9c847a 100644
--- a/drivers/acpi/drivers/core/Makefile
+++ b/drivers/acpi/drivers/core/Makefile
@@ -1,5 +1,5 @@
 
-obj-y	:=	bus.o device.o driver.o
+obj-y	:=	bus.o device.o driver.o event.o
 obj-y	+=	lib.o
 
 obj-$(CONFIG_ACPI_DM_SYSFS)	+=	sysfs.o
diff --git a/drivers/acpi/drivers/core/event.c b/drivers/acpi/drivers/core/event.c
new file mode 100644
index 0000000..acc4eb6
--- /dev/null
+++ b/drivers/acpi/drivers/core/event.c
@@ -0,0 +1,62 @@
+/**
+ *	drivers/acpi/drivers/core/event.c - Core event management
+ *
+ *	Copyright (C) 2006 Patrick Mochel
+ *
+ */
+
+#include "core.h"
+
+
+/**
+ *	acpi_device_event_add - Register a driver's event handler
+ *	@ad:	The device to register handler for.
+ *
+ *	This function is called by the ACPI driver core, 
+ *	after the device has been successfully added to the 
+ *	driver. 
+ *
+ *	This is all simple - we check for a valid ->d_event
+ *	field in the driver, and if it's there, use it to
+ *	register a handler for the device.
+ */
+
+int acpi_device_event_add(struct acpi_dev * ad)
+{
+	struct acpi_device_driver * drv = to_acpi_driver(ad->dev.driver);
+	struct acpi_device_event * e = drv->d_event;
+	int ret = 0;
+
+	if (e && e->e_handler) {
+		acpi_status status;
+
+		status = acpi_install_notify_handler(ad->acpi_device->handle,
+						     e->e_type, 
+						     e->e_handler,
+						     ad);
+		if (ACPI_FAILURE(status)) {
+			err("Installing notify handler failed for [%s] [%s]",
+			    drv->d_drv.name, ad->dev.bus_id);
+			ret = -EIO;
+		}
+	}
+	return ret;
+}
+
+
+/**
+ *	acpi_device_event_remove - Unregister a driver's event handler
+ *	@ad:	The device to unregister the handler for.
+ *
+ */
+
+void acpi_device_event_remove(struct acpi_dev * ad)
+{
+	struct acpi_device_driver * drv = to_acpi_driver(ad->dev.driver);
+	struct acpi_device_event * e = drv->d_event;
+
+	if (e && e->e_handler) {
+		acpi_remove_notify_handler(ad->acpi_device->handle,
+					   e->e_type, e->e_handler);
+	}
+}
diff --git a/drivers/acpi/drivers/core/event.h b/drivers/acpi/drivers/core/event.h
new file mode 100644
index 0000000..9eddbc1
--- /dev/null
+++ b/drivers/acpi/drivers/core/event.h
@@ -0,0 +1,9 @@
+/**
+ *	drivers/acpi/drivers/core/event.h
+ *
+ *	Event handler interface for ACPI driver model.
+ */
+
+
+extern int acpi_device_event_add(struct acpi_dev * ad);
+extern void acpi_device_event_remove(struct acpi_dev * ad);
---
0.99.9.GIT