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, 4 insertions, 2 deletions

diff --git a/drivers/video/backlight/max8925_bl.c b/drivers/video/backlight/max8925_bl.c
index c267069a52a3..c91adaf492cf 100644
--- a/drivers/video/backlight/max8925_bl.c
+++ b/drivers/video/backlight/max8925_bl.c
@@ -104,6 +104,7 @@ static int __devinit max8925_backlight_probe(struct platform_device *pdev)
         struct max8925_backlight_pdata *pdata = NULL;
         struct max8925_backlight_data *data;
         struct backlight_device *bl;
+        struct backlight_properties props;
         struct resource *res;
         char name[MAX8925_NAME_SIZE];
         unsigned char value;
@@ -133,14 +134,15 @@ static int __devinit max8925_backlight_probe(struct platform_device *pdev)
         data->chip = chip;
         data->current_brightness = 0;
 
+        memset(&props, 0, sizeof(struct backlight_properties));
+        props.max_brightness = MAX_BRIGHTNESS;
         bl = backlight_device_register(name, &pdev->dev, data,
-                                        &max8925_backlight_ops);
+                                        &max8925_backlight_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 = MAX_BRIGHTNESS;
         bl->props.brightness = MAX_BRIGHTNESS;
 
         platform_set_drvdata(pdev, bl);