| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * Copyright (C) 2009-2010, Lars-Peter Clausen <[email protected]> |
| * PCF50633 backlight device driver |
| */ |
| |
| #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 |
| |
