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, 6 insertions, 2 deletions

diff --git a/drivers/video/backlight/kb3886_bl.c b/drivers/video/backlight/kb3886_bl.c
index 939e7b830cf3..f439a8632287 100644
--- a/drivers/video/backlight/kb3886_bl.c
+++ b/drivers/video/backlight/kb3886_bl.c
@@ -141,20 +141,24 @@ static const struct backlight_ops kb3886bl_ops = {
 
 static int kb3886bl_probe(struct platform_device *pdev)
 {
+        struct backlight_properties props;
         struct kb3886bl_machinfo *machinfo = pdev->dev.platform_data;
 
         bl_machinfo = machinfo;
         if (!machinfo->limit_mask)
                 machinfo->limit_mask = -1;
 
+        memset(&props, 0, sizeof(struct backlight_properties));
+        props.max_brightness = machinfo->max_intensity;
         kb3886_backlight_device = backlight_device_register("kb3886-bl",
-                &pdev->dev, NULL, &kb3886bl_ops);
+                                                            &pdev->dev, NULL,
+                                                            &kb3886bl_ops,
+                                                            &props);
         if (IS_ERR(kb3886_backlight_device))
                 return PTR_ERR(kb3886_backlight_device);
 
         platform_set_drvdata(pdev, kb3886_backlight_device);
 
-        kb3886_backlight_device->props.max_brightness = machinfo->max_intensity;
         kb3886_backlight_device->props.power = FB_BLANK_UNBLANK;
         kb3886_backlight_device->props.brightness = machinfo->default_intensity;
         backlight_update_status(kb3886_backlight_device);