diff options
Diffstat (limited to 'include/linux/mfd/pcf50633/backlight.h')
| -rw-r--r-- | include/linux/mfd/pcf50633/backlight.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/include/linux/mfd/pcf50633/backlight.h b/include/linux/mfd/pcf50633/backlight.h new file mode 100644 index 000000000..fd4a4f8d6 --- /dev/null +++ b/include/linux/mfd/pcf50633/backlight.h @@ -0,0 +1,42 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de> + * 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 + |