| Lars-Peter Clausen | 2ddfd12 | 2010-05-12 02:44:32 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de> |
| 3 | * PCF50633 backlight device driver |
| 4 | * |
| 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. |
| 9 | * |
| 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. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #ifndef __LINUX_MFD_PCF50633_BACKLIGHT |
| 17 | #define __LINUX_MFD_PCF50633_BACKLIGHT |
| 18 | |
| 19 | /* |
| 20 | * @default_brightness: Backlight brightness is initialized to this value |
| 21 | * |
| 22 | * Brightness to be used after the driver has been probed. |
| 23 | * Valid range 0-63. |
| 24 | * |
| 25 | * @default_brightness_limit: The actual brightness is limited by this value |
| 26 | * |
| 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 |
| 29 | * probe. |
| 30 | * Valid range 0-63. Can be changed later with pcf50633_bl_set_brightness_limit. |
| 31 | * |
| 32 | * @ramp_time: Display ramp time when changing brightness |
| 33 | * |
| 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. |
| 37 | * Valid range 0-255 |
| 38 | */ |
| 39 | struct pcf50633_bl_platform_data { |
| 40 | unsigned int default_brightness; |
| 41 | unsigned int default_brightness_limit; |
| 42 | uint8_t ramp_time; |
| 43 | }; |
| 44 | |
| 45 | |
| 46 | struct pcf50633; |
| 47 | |
| 48 | int pcf50633_bl_set_brightness_limit(struct pcf50633 *pcf, unsigned int limit); |
| 49 | |
| 50 | #endif |
| 51 | |