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, 3 deletions

diff --git a/drivers/video/backlight/generic_bl.c b/drivers/video/backlight/generic_bl.c
index e6d348e63596..312ca619735d 100644
--- a/drivers/video/backlight/generic_bl.c
+++ b/drivers/video/backlight/generic_bl.c
@@ -78,6 +78,7 @@ static const struct backlight_ops genericbl_ops = {
 
 static int genericbl_probe(struct platform_device *pdev)
 {
+        struct backlight_properties props;
         struct generic_bl_info *machinfo = pdev->dev.platform_data;
         const char *name = "generic-bl";
         struct backlight_device *bd;
@@ -89,14 +90,15 @@ static int genericbl_probe(struct platform_device *pdev)
         if (machinfo->name)
                 name = machinfo->name;
 
-        bd = backlight_device_register (name,
-                &pdev->dev, NULL, &genericbl_ops);
+        memset(&props, 0, sizeof(struct backlight_properties));
+        props.max_brightness = machinfo->max_intensity;
+        bd = backlight_device_register(name, &pdev->dev, NULL, &genericbl_ops,
+                                       &props);
         if (IS_ERR (bd))
                 return PTR_ERR (bd);
 
         platform_set_drvdata(pdev, bd);
 
-        bd->props.max_brightness = machinfo->max_intensity;
         bd->props.power = FB_BLANK_UNBLANK;
         bd->props.brightness = machinfo->default_intensity;
         backlight_update_status(bd);