backlight: Allow properties to be passed at registration

Values such as max_brightness should be set before backlights are
registered, but the current API doesn't allow that. Add a parameter to
backlight_device_register and update drivers to ensure that they
set this correctly.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/video/riva/fbdev.c b/drivers/video/riva/fbdev.c
index d94c57ffbdb1..618f36bec10d 100644
--- a/drivers/video/riva/fbdev.c
+++ b/drivers/video/riva/fbdev.c
@@ -338,6 +338,7 @@ static struct backlight_ops riva_bl_ops = {
 
 static void riva_bl_init(struct riva_par *par)
 {
+        struct backlight_properties props;
         struct fb_info *info = pci_get_drvdata(par->pdev);
         struct backlight_device *bd;
         char name[12];
@@ -353,7 +354,10 @@ static void riva_bl_init(struct riva_par *par)
 
         snprintf(name, sizeof(name), "rivabl%d", info->node);
 
-        bd = backlight_device_register(name, info->dev, par, &riva_bl_ops);
+        memset(&props, 0, sizeof(struct backlight_properties));
+        props.max_brightness = FB_BACKLIGHT_LEVELS - 1;
+        bd = backlight_device_register(name, info->dev, par, &riva_bl_ops,
+                                       &props);
         if (IS_ERR(bd)) {
                 info->bl_dev = NULL;
                 printk(KERN_WARNING "riva: Backlight registration failed\n");
@@ -365,7 +369,6 @@ static void riva_bl_init(struct riva_par *par)
                 MIN_LEVEL * FB_BACKLIGHT_MAX / MAX_LEVEL,
                 FB_BACKLIGHT_MAX);
 
-        bd->props.max_brightness = FB_BACKLIGHT_LEVELS - 1;
         bd->props.brightness = bd->props.max_brightness;
         bd->props.power = FB_BLANK_UNBLANK;
         backlight_update_status(bd);