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authorSeth Forshee <seth.forshee@canonical.com>2012-03-16 23:41:21 +0400
committerMatthew Garrett <mjg@redhat.com>2012-03-22 17:31:55 +0400
commit83e72dd97a25a831ff270ce4437416943a1e4b36 (patch)
tree9eeaaa019cc92527469d2976238c1443eadeab21 /include/linux/apple_bl.h
parentf11f999e989061952f1a27bd0c49645a46d13173 (diff)
downloadlinux-83e72dd97a25a831ff270ce4437416943a1e4b36.tar.xz
apple_bl: Add register/unregister functions
Add functions to allow other modules to enable or disable apple_bl. This will be used by the gmux driver to disable apple_bl when the gmux is present, as it is a better and more reliable option for brightness control. Signed-off-by: Seth Forshee <seth.forshee@canonical.com> Signed-off-by: Matthew Garrett <mjg@redhat.com>
Diffstat (limited to 'include/linux/apple_bl.h')
-rw-r--r--include/linux/apple_bl.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/apple_bl.h b/include/linux/apple_bl.h
new file mode 100644
index 000000000000..47bedc0eee69
--- /dev/null
+++ b/include/linux/apple_bl.h
@@ -0,0 +1,26 @@
+/*
+ * apple_bl exported symbols
+ */
+
+#ifndef _LINUX_APPLE_BL_H
+#define _LINUX_APPLE_BL_H
+
+#ifdef CONFIG_BACKLIGHT_APPLE
+
+extern int apple_bl_register(void);
+extern void apple_bl_unregister(void);
+
+#else /* !CONFIG_BACKLIGHT_APPLE */
+
+static inline int apple_bl_register(void)
+{
+ return 0;
+}
+
+static inline void apple_bl_unregister(void)
+{
+}
+
+#endif /* !CONFIG_BACKLIGHT_APPLE */
+
+#endif /* _LINUX_APPLE_BL_H */