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/88pm860x_bl.c b/drivers/video/backlight/88pm860x_bl.c
index b8f705cca438..93e25c77aeb2 100644
--- a/drivers/video/backlight/88pm860x_bl.c
+++ b/drivers/video/backlight/88pm860x_bl.c
@@ -187,6 +187,7 @@ static int pm860x_backlight_probe(struct platform_device *pdev)
         struct pm860x_backlight_data *data;
         struct backlight_device *bl;
         struct resource *res;
+        struct backlight_properties props;
         unsigned char value;
         char name[MFD_NAME_SIZE];
         int ret;
@@ -223,14 +224,15 @@ static int pm860x_backlight_probe(struct platform_device *pdev)
                 return -EINVAL;
         }
 
+        memset(&props, 0, sizeof(struct backlight_properties));
+        props.max_brightness = MAX_BRIGHTNESS;
         bl = backlight_device_register(name, &pdev->dev, data,
-                                        &pm860x_backlight_ops);
+                                        &pm860x_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);