backlight: Set structure to safe values when not initialised

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/backlight.h b/src/backlight.h
index c251bd92..6391be76 100644
--- a/src/backlight.h
+++ b/src/backlight.h
@@ -38,12 +38,13 @@ enum backlight_type {
 struct backlight {
 	char *iface;
 	enum backlight_type type;
-	int max;
+	int original, max;
 	int pid, fd;
 };
 
 enum backlight_type backlight_exists(const char *iface);
 
+void backlight_init(struct backlight *backlight);
 int backlight_open(struct backlight *backlight, char *iface);
 int backlight_set(struct backlight *backlight, int level);
 int backlight_get(struct backlight *backlight);