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/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index 5a3d851..6553b91 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -1291,9 +1291,13 @@
"controlled by ACPI video driver\n");
} else if (ACPI_SUCCESS(acpi_get_handle(sony_nc_acpi_handle, "GBRT",
&handle))) {
+ struct backlight_properties props;
+ memset(&props, 0, sizeof(struct backlight_properties));
+ props.max_brightness = SONY_MAX_BRIGHTNESS - 1;
sony_backlight_device = backlight_device_register("sony", NULL,
NULL,
- &sony_backlight_ops);
+ &sony_backlight_ops,
+ &props);
if (IS_ERR(sony_backlight_device)) {
printk(KERN_WARNING DRV_PFX "unable to register backlight device\n");
@@ -1302,8 +1306,6 @@
sony_backlight_device->props.brightness =
sony_backlight_get_brightness
(sony_backlight_device);
- sony_backlight_device->props.max_brightness =
- SONY_MAX_BRIGHTNESS - 1;
}
}