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authorMatthew Garrett <mjg@redhat.com>2010-02-17 16:39:44 -0500
committerRichard Purdie <rpurdie@linux.intel.com>2010-03-16 19:47:54 +0000
commita19a6ee6cad2b20292a774c2f56ba8039b0fac9c (patch)
tree631916ce6181336c5c28eb0cf5484c40c92986b6 /drivers/usb/misc/appledisplay.c
parent57e148b6a975980944f4466ccb669b1d02dfc6a1 (diff)
downloadblackbird-op-linux-a19a6ee6cad2b20292a774c2f56ba8039b0fac9c.tar.gz
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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>
Diffstat (limited to 'drivers/usb/misc/appledisplay.c')
-rw-r--r--drivers/usb/misc/appledisplay.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/usb/misc/appledisplay.c b/drivers/usb/misc/appledisplay.c
index 4d2952f1fb13..3adab041355a 100644
--- a/drivers/usb/misc/appledisplay.c
+++ b/drivers/usb/misc/appledisplay.c
@@ -202,6 +202,7 @@ static void appledisplay_work(struct work_struct *work)
static int appledisplay_probe(struct usb_interface *iface,
const struct usb_device_id *id)
{
+ struct backlight_properties props;
struct appledisplay *pdata;
struct usb_device *udev = interface_to_usbdev(iface);
struct usb_host_interface *iface_desc;
@@ -279,16 +280,16 @@ static int appledisplay_probe(struct usb_interface *iface,
/* Register backlight device */
snprintf(bl_name, sizeof(bl_name), "appledisplay%d",
atomic_inc_return(&count_displays) - 1);
+ memset(&props, 0, sizeof(struct backlight_properties));
+ props.max_brightness = 0xff;
pdata->bd = backlight_device_register(bl_name, NULL, pdata,
- &appledisplay_bl_data);
+ &appledisplay_bl_data, &props);
if (IS_ERR(pdata->bd)) {
dev_err(&iface->dev, "Backlight registration failed\n");
retval = PTR_ERR(pdata->bd);
goto error;
}
- pdata->bd->props.max_brightness = 0xff;
-
/* Try to get brightness */
brightness = appledisplay_bl_get_brightness(pdata->bd);
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