1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de> 4*4882a593Smuzhiyun * PCF50633 backlight device driver 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #ifndef __LINUX_MFD_PCF50633_BACKLIGHT 8*4882a593Smuzhiyun #define __LINUX_MFD_PCF50633_BACKLIGHT 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun /* 11*4882a593Smuzhiyun * @default_brightness: Backlight brightness is initialized to this value 12*4882a593Smuzhiyun * 13*4882a593Smuzhiyun * Brightness to be used after the driver has been probed. 14*4882a593Smuzhiyun * Valid range 0-63. 15*4882a593Smuzhiyun * 16*4882a593Smuzhiyun * @default_brightness_limit: The actual brightness is limited by this value 17*4882a593Smuzhiyun * 18*4882a593Smuzhiyun * Brightness limit to be used after the driver has been probed. This is useful 19*4882a593Smuzhiyun * when it is not known how much power is available for the backlight during 20*4882a593Smuzhiyun * probe. 21*4882a593Smuzhiyun * Valid range 0-63. Can be changed later with pcf50633_bl_set_brightness_limit. 22*4882a593Smuzhiyun * 23*4882a593Smuzhiyun * @ramp_time: Display ramp time when changing brightness 24*4882a593Smuzhiyun * 25*4882a593Smuzhiyun * When changing the backlights brightness the change is not instant, instead 26*4882a593Smuzhiyun * it fades smooth from one state to another. This value specifies how long 27*4882a593Smuzhiyun * the fade should take. The lower the value the higher the fade time. 28*4882a593Smuzhiyun * Valid range 0-255 29*4882a593Smuzhiyun */ 30*4882a593Smuzhiyun struct pcf50633_bl_platform_data { 31*4882a593Smuzhiyun unsigned int default_brightness; 32*4882a593Smuzhiyun unsigned int default_brightness_limit; 33*4882a593Smuzhiyun uint8_t ramp_time; 34*4882a593Smuzhiyun }; 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun struct pcf50633; 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun int pcf50633_bl_set_brightness_limit(struct pcf50633 *pcf, unsigned int limit); 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun #endif 42*4882a593Smuzhiyun 43