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/max8925_bl.c b/drivers/video/backlight/max8925_bl.c
index c267069..c91adaf 100644
--- a/drivers/video/backlight/max8925_bl.c
+++ b/drivers/video/backlight/max8925_bl.c
@@ -104,6 +104,7 @@
struct max8925_backlight_pdata *pdata = NULL;
struct max8925_backlight_data *data;
struct backlight_device *bl;
+ struct backlight_properties props;
struct resource *res;
char name[MAX8925_NAME_SIZE];
unsigned char value;
@@ -133,14 +134,15 @@
data->chip = chip;
data->current_brightness = 0;
+ memset(&props, 0, sizeof(struct backlight_properties));
+ props.max_brightness = MAX_BRIGHTNESS;
bl = backlight_device_register(name, &pdev->dev, data,
- &max8925_backlight_ops);
+ &max8925_backlight_ops, &props);
if (IS_ERR(bl)) {
dev_err(&pdev->dev, "failed to register backlight\n");
kfree(data);
return PTR_ERR(bl);
}
- bl->props.max_brightness = MAX_BRIGHTNESS;
bl->props.brightness = MAX_BRIGHTNESS;
platform_set_drvdata(pdev, bl);