43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
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* PCF50633 backlight device driver
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*/
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#ifndef __LINUX_MFD_PCF50633_BACKLIGHT
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#define __LINUX_MFD_PCF50633_BACKLIGHT
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/*
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* @default_brightness: Backlight brightness is initialized to this value
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*
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* Brightness to be used after the driver has been probed.
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* Valid range 0-63.
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*
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* @default_brightness_limit: The actual brightness is limited by this value
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*
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* Brightness limit to be used after the driver has been probed. This is useful
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* when it is not known how much power is available for the backlight during
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* probe.
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* Valid range 0-63. Can be changed later with pcf50633_bl_set_brightness_limit.
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*
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* @ramp_time: Display ramp time when changing brightness
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*
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* When changing the backlights brightness the change is not instant, instead
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* it fades smooth from one state to another. This value specifies how long
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* the fade should take. The lower the value the higher the fade time.
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* Valid range 0-255
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*/
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struct pcf50633_bl_platform_data {
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unsigned int default_brightness;
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unsigned int default_brightness_limit;
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uint8_t ramp_time;
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};
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struct pcf50633;
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int pcf50633_bl_set_brightness_limit(struct pcf50633 *pcf, unsigned int limit);
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#endif
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