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, 9 insertions, 5 deletions

diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
index 5f3320d468f6..c1074b32490e 100644
--- a/drivers/platform/x86/fujitsu-laptop.c
+++ b/drivers/platform/x86/fujitsu-laptop.c
@@ -1126,16 +1126,20 @@ static int __init fujitsu_init(void)
         /* Register backlight stuff */
 
         if (!acpi_video_backlight_support()) {
-                fujitsu->bl_device =
-                        backlight_device_register("fujitsu-laptop", NULL, NULL,
-                                                  &fujitsubl_ops);
+                struct backlight_properties props;
+
+                memset(&props, 0, sizeof(struct backlight_properties));
+                max_brightness = fujitsu->max_brightness;
+                props.max_brightness = max_brightness - 1;
+                fujitsu->bl_device = backlight_device_register("fujitsu-laptop",
+                                                               NULL, NULL,
+                                                               &fujitsubl_ops,
+                                                               &props);
                 if (IS_ERR(fujitsu->bl_device)) {
                         ret = PTR_ERR(fujitsu->bl_device);
                         fujitsu->bl_device = NULL;
                         goto fail_sysfs_group;
                 }
-                max_brightness = fujitsu->max_brightness;
-                fujitsu->bl_device->props.max_brightness = max_brightness - 1;
                 fujitsu->bl_device->props.brightness = fujitsu->brightness_level;
         }