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, 3 deletions

diff --git a/drivers/video/backlight/wm831x_bl.c b/drivers/video/backlight/wm831x_bl.c
index e32add37a203..a4312709fb1b 100644
--- a/drivers/video/backlight/wm831x_bl.c
+++ b/drivers/video/backlight/wm831x_bl.c
@@ -125,6 +125,7 @@ static int wm831x_backlight_probe(struct platform_device *pdev)
         struct wm831x_backlight_pdata *pdata;
         struct wm831x_backlight_data *data;
         struct backlight_device *bl;
+        struct backlight_properties props;
         int ret, i, max_isel, isink_reg, dcdc_cfg;
 
         /* We need platform data */
@@ -191,15 +192,15 @@ static int wm831x_backlight_probe(struct platform_device *pdev)
         data->current_brightness = 0;
         data->isink_reg = isink_reg;
 
-        bl = backlight_device_register("wm831x", &pdev->dev,
-                        data, &wm831x_backlight_ops);
+        props.max_brightness = max_isel;
+        bl = backlight_device_register("wm831x", &pdev->dev, data,
+                                       &wm831x_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_isel;
         bl->props.brightness = max_isel;
 
         platform_set_drvdata(pdev, bl);