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backlight: add backlight type

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There may be multiple ways of controlling the backlight on a given
machine.  Allow drivers to expose the type of interface they are
providing, making it possible for userspace to make appropriate policy
decisions.

Signed-off-by: Matthew Garrett <[email protected]>
Cc: Richard Purdie <[email protected]>
Cc: Chris Wilson <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Alex Deucher <[email protected]>
Cc: Ben Skeggs <[email protected]>
Cc: Zhang Rui <[email protected]>
Cc: Len Brown <[email protected]>
Cc: Jesse Barnes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Matthew Garrett 2011-03-22 16:30:21 -07:00 • committed by Linus Torvalds
commit bb7ca747f8
59 changed files with 111 additions and 2 deletions
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1
drivers/acpi/video.c
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@ -795,6 +795,7 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
count++;
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_FIRMWARE;
props.max_brightness = device->brightness->count - 3;
device->backlight = backlight_device_register(name, NULL, device,
&acpi_backlight_ops,