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, 5 deletions

diff --git a/drivers/video/backlight/adp5520_bl.c b/drivers/video/backlight/adp5520_bl.c
index 86d95c228adb..5183f0e4d314 100644
--- a/drivers/video/backlight/adp5520_bl.c
+++ b/drivers/video/backlight/adp5520_bl.c
@@ -278,6 +278,7 @@ static const struct attribute_group adp5520_bl_attr_group = {
 
 static int __devinit adp5520_bl_probe(struct platform_device *pdev)
 {
+        struct backlight_properties props;
         struct backlight_device *bl;
         struct adp5520_bl *data;
         int ret = 0;
@@ -300,17 +301,17 @@ static int __devinit adp5520_bl_probe(struct platform_device *pdev)
 
         mutex_init(&data->lock);
 
-        bl = backlight_device_register(pdev->name, data->master,
-                        data, &adp5520_bl_ops);
+        memset(&props, 0, sizeof(struct backlight_properties));
+        props.max_brightness = ADP5020_MAX_BRIGHTNESS;
+        bl = backlight_device_register(pdev->name, data->master, data,
+                                       &adp5520_bl_ops, &props);
         if (IS_ERR(bl)) {
                 dev_err(&pdev->dev, "failed to register backlight\n");
                 kfree(data);
                 return PTR_ERR(bl);
         }
 
-        bl->props.max_brightness =
-                bl->props.brightness = ADP5020_MAX_BRIGHTNESS;
-
+        bl->props.brightness = ADP5020_MAX_BRIGHTNESS;
         if (data->pdata->en_ambl_sens)
                 ret = sysfs_create_group(&bl->dev.kobj,
                         &adp5520_bl_attr_group);