mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-14 15:46:43 +07:00
2ddfd12f35
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>
52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/*
|
|
* 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
|
|
|