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 <thellst...@vmware.com>
---
drivers/gpu/drm/drm_sysfs.c | 25 +++++++++++++++++++++++++
include/drm/drm_sysfs.h | 12 ++++++++++++
2 files changed, 37 insertions(+), 0 deletions(-)
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 adc1794..de15455 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 0000000..1d8e033
--- /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
--
1.6.1.3
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