Edit File: backlight.h
/* * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de> * PCF50633 backlight device driver * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. * */ #ifndef __LINUX_MFD_PCF50633_BACKLIGHT #define __LINUX_MFD_PCF50633_BACKLIGHT /* * @default_brightness: Backlight brightness is initialized to this value * * Brightness to be used after the driver has been probed. * Valid range 0-63. * * @default_brightness_limit: The actual brightness is limited by this value * * Brightness limit to be used after the driver has been probed. This is useful * when it is not known how much power is available for the backlight during * probe. * Valid range 0-63. Can be changed later with pcf50633_bl_set_brightness_limit. * * @ramp_time: Display ramp time when changing brightness * * When changing the backlights brightness the change is not instant, instead * it fades smooth from one state to another. This value specifies how long * the fade should take. The lower the value the higher the fade time. * Valid range 0-255 */ struct pcf50633_bl_platform_data { unsigned int default_brightness; unsigned int default_brightness_limit; uint8_t ramp_time; }; struct pcf50633; int pcf50633_bl_set_brightness_limit(struct pcf50633 *pcf, unsigned int limit); #endif