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/msi-wmi.c b/drivers/platform/x86/msi-wmi.c
index f5f70d4..fb7ccaa 100644
--- a/drivers/platform/x86/msi-wmi.c
+++ b/drivers/platform/x86/msi-wmi.c
@@ -249,12 +249,15 @@
goto err_uninstall_notifier;
if (!acpi_video_backlight_support()) {
- backlight = backlight_device_register(DRV_NAME,
- NULL, NULL, &msi_backlight_ops);
+ struct backlight_properties props;
+ memset(&props, 0, sizeof(struct backlight_properties));
+ props.max_brightness = ARRAY_SIZE(backlight_map) - 1;
+ backlight = backlight_device_register(DRV_NAME, NULL, NULL,
+ &msi_backlight_ops,
+ &props);
if (IS_ERR(backlight))
goto err_free_input;
- backlight->props.max_brightness = ARRAY_SIZE(backlight_map) - 1;
err = bl_get(NULL);
if (err < 0)
goto err_free_backlight;