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/backlight/mbp_nvidia_bl.c b/drivers/video/backlight/mbp_nvidia_bl.c
index 2e78b07..0881358 100644
--- a/drivers/video/backlight/mbp_nvidia_bl.c
+++ b/drivers/video/backlight/mbp_nvidia_bl.c
@@ -250,6 +250,7 @@
static int __init mbp_init(void)
{
+ struct backlight_properties props;
if (!dmi_check_system(mbp_device_table))
return -ENODEV;
@@ -257,14 +258,17 @@
"Macbook Pro backlight"))
return -ENXIO;
- mbp_backlight_device = backlight_device_register("mbp_backlight",
- NULL, NULL, &driver_data->backlight_ops);
+ memset(&props, 0, sizeof(struct backlight_properties));
+ props.max_brightness = 15;
+ mbp_backlight_device = backlight_device_register("mbp_backlight", NULL,
+ NULL,
+ &driver_data->backlight_ops,
+ &props);
if (IS_ERR(mbp_backlight_device)) {
release_region(driver_data->iostart, driver_data->iolen);
return PTR_ERR(mbp_backlight_device);
}
- mbp_backlight_device->props.max_brightness = 15;
mbp_backlight_device->props.brightness =
driver_data->backlight_ops.get_brightness(mbp_backlight_device);
backlight_update_status(mbp_backlight_device);