diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2010-05-12 04:44:32 +0400 |
|---|---|---|
| committer | Richard Purdie <rpurdie@linux.intel.com> | 2010-05-26 20:34:38 +0400 |
| commit | 2ddfd12f3584840f5190897214423061d8a0602f (patch) | |
| tree | 91addeb7e06bd84c69e8ba0ec0044d9cd7270fcc /include/linux/mfd/pcf50633 | |
| parent | 1f976996c7413b5b48d35b195cc2d7adcd3f68d7 (diff) | |
| download | linux-2ddfd12f3584840f5190897214423061d8a0602f.tar.xz | |
backlight: Add pcf50633 backlight driver
This patch adds a backlight driver for controlling the pcf50633 LED module.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Diffstat (limited to 'include/linux/mfd/pcf50633')
| -rw-r--r-- | include/linux/mfd/pcf50633/backlight.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/include/linux/mfd/pcf50633/backlight.h b/include/linux/mfd/pcf50633/backlight.h new file mode 100644 index 000000000000..83747e217b27 --- /dev/null +++ b/include/linux/mfd/pcf50633/backlight.h @@ -0,0 +1,51 @@ +/* + * 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 + |