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>
diff --git a/drivers/video/atmel_lcdfb.c b/drivers/video/atmel_lcdfb.c
index 3d886c6..11de3bf 100644
--- a/drivers/video/atmel_lcdfb.c
+++ b/drivers/video/atmel_lcdfb.c
@@ -117,6 +117,7 @@
static void init_backlight(struct atmel_lcdfb_info *sinfo)
{
+ struct backlight_properties props;
struct backlight_device *bl;
sinfo->bl_power = FB_BLANK_UNBLANK;
@@ -124,8 +125,10 @@
if (sinfo->backlight)
return;
- bl = backlight_device_register("backlight", &sinfo->pdev->dev,
- sinfo, &atmel_lcdc_bl_ops);
+ memset(&props, 0, sizeof(struct backlight_properties));
+ props.max_brightness = 0xff;
+ bl = backlight_device_register("backlight", &sinfo->pdev->dev, sinfo,
+ &atmel_lcdc_bl_ops, &props);
if (IS_ERR(bl)) {
dev_err(&sinfo->pdev->dev, "error %ld on backlight register\n",
PTR_ERR(bl));
@@ -135,7 +138,6 @@
bl->props.power = FB_BLANK_UNBLANK;
bl->props.fb_blank = FB_BLANK_UNBLANK;
- bl->props.max_brightness = 0xff;
bl->props.brightness = atmel_bl_get_brightness(bl);
}