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, 5 insertions, 2 deletions

diff --git a/drivers/video/nvidia/nv_backlight.c b/drivers/video/nvidia/nv_backlight.c
index 443e3c85a9a0..2fb552a6f32c 100644
--- a/drivers/video/nvidia/nv_backlight.c
+++ b/drivers/video/nvidia/nv_backlight.c
@@ -94,6 +94,7 @@ static struct backlight_ops nvidia_bl_ops = {
 
 void nvidia_bl_init(struct nvidia_par *par)
 {
+        struct backlight_properties props;
         struct fb_info *info = pci_get_drvdata(par->pci_dev);
         struct backlight_device *bd;
         char name[12];
@@ -109,7 +110,10 @@ void nvidia_bl_init(struct nvidia_par *par)
 
         snprintf(name, sizeof(name), "nvidiabl%d", info->node);
 
-        bd = backlight_device_register(name, info->dev, par, &nvidia_bl_ops);
+        memset(&props, 0, sizeof(struct backlight_properties));
+        props.max_brightness = FB_BACKLIGHT_LEVELS - 1;
+        bd = backlight_device_register(name, info->dev, par, &nvidia_bl_ops,
+                                       &props);
         if (IS_ERR(bd)) {
                 info->bl_dev = NULL;
                 printk(KERN_WARNING "nvidia: Backlight registration failed\n");
@@ -121,7 +125,6 @@ void nvidia_bl_init(struct nvidia_par *par)
                 0x158 * FB_BACKLIGHT_MAX / MAX_LEVEL,
                 0x534 * FB_BACKLIGHT_MAX / MAX_LEVEL);
 
-        bd->props.max_brightness = FB_BACKLIGHT_LEVELS - 1;
         bd->props.brightness = bd->props.max_brightness;
         bd->props.power = FB_BLANK_UNBLANK;
         backlight_update_status(bd);