From 327c225bd548bf7871f116a0baa5ebdac884e452 Mon Sep 17 00:00:00 2001
From: Thomas Hellstrom <thellstrom@vmware.com>
Date: Mon, 17 Aug 2009 16:28:37 +0200
Subject: [PATCH] drm: Enable drm drivers to add drm sysfs devices.

Export utility functions for drivers to add specialized devices in the
sysfs drm class subdirectory.

Initially this will be needed form TTM to add a virtual device that
handles power management.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>
---
 drivers/gpu/drm/drm_sysfs.c | 25 +++++++++++++++++++++++++
 include/drm/drm_sysfs.h     | 12 ++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 include/drm/drm_sysfs.h

diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index adc179459c2..de154556c40 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -16,6 +16,7 @@
 #include <linux/kdev_t.h>
 #include <linux/err.h>
 
+#include "drm_sysfs.h"
 #include "drm_core.h"
 #include "drmP.h"
 
@@ -515,3 +516,27 @@ void drm_sysfs_device_remove(struct drm_minor *minor)
 {
 	device_unregister(&minor->kdev);
 }
+
+
+/**
+ * drm_class_device_register - Register a struct device in the drm class.
+ *
+ * @dev: pointer to struct device to register.
+ *
+ * @dev should have all relevant members pre-filled with the exception
+ * of the class member. In particular, the device_type member must
+ * be set.
+ */
+
+int drm_class_device_register(struct device *dev)
+{
+	dev->class = drm_class;
+	return device_register(dev);
+}
+EXPORT_SYMBOL_GPL(drm_class_device_register);
+
+void drm_class_device_unregister(struct device *dev)
+{
+	return device_unregister(dev);
+}
+EXPORT_SYMBOL_GPL(drm_class_device_unregister);
diff --git a/include/drm/drm_sysfs.h b/include/drm/drm_sysfs.h
new file mode 100644
index 00000000000..1d8e033fde6
--- /dev/null
+++ b/include/drm/drm_sysfs.h
@@ -0,0 +1,12 @@
+#ifndef _DRM_SYSFS_H_
+#define _DRM_SYSFS_H_
+
+/**
+ * This minimalistic include file is intended for users (read TTM) that
+ * don't want to include the full drmP.h file.
+ */
+
+extern int drm_class_device_register(struct device *dev);
+extern void drm_class_device_unregister(struct device *dev);
+
+#endif