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backlight: Allow properties to be passed at registration

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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 <[email protected]>
Signed-off-by: Richard Purdie <[email protected]>
This commit is contained in:
Matthew Garrett 2010-02-17 16:39:44 -05:00 • committed by Richard Purdie
commit a19a6ee6ca
49 changed files with 271 additions and 151 deletions
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7
drivers/usb/misc/appledisplay.c
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@ -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);