2 * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
3 * PCF50633 backlight device driver
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
10 * You should have received a copy of the GNU General Public License along
11 * with this program; if not, write to the Free Software Foundation, Inc.,
12 * 675 Mass Ave, Cambridge, MA 02139, USA.
16 #ifndef __LINUX_MFD_PCF50633_BACKLIGHT
17 #define __LINUX_MFD_PCF50633_BACKLIGHT
20 * @default_brightness: Backlight brightness is initialized to this value
22 * Brightness to be used after the driver has been probed.
25 * @default_brightness_limit: The actual brightness is limited by this value
27 * Brightness limit to be used after the driver has been probed. This is useful
28 * when it is not known how much power is available for the backlight during
30 * Valid range 0-63. Can be changed later with pcf50633_bl_set_brightness_limit.
32 * @ramp_time: Display ramp time when changing brightness
34 * When changing the backlights brightness the change is not instant, instead
35 * it fades smooth from one state to another. This value specifies how long
36 * the fade should take. The lower the value the higher the fade time.
39 struct pcf50633_bl_platform_data {
40 unsigned int default_brightness;
41 unsigned int default_brightness_limit;
48 int pcf50633_bl_set_brightness_limit(struct pcf50633 *pcf, unsigned int limit);