64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
/***************************************************************************
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* __________ __ ___
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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*
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* Copyright (C) 2017 Marcin Bukat
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdio.h>
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#include "config.h"
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#include "backlight-target.h"
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#include "sysfs.h"
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#include "panic.h"
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static const char * const sysfs_bl_brightness =
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"/sys/class/backlight/pwm-backlight.0/brightness";
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static const char * const sysfs_bl_power =
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"/sys/class/backlight/pwm-backlight.0/bl_power";
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bool backlight_hw_init(void)
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{
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backlight_hw_on();
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backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
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return true;
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}
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void backlight_hw_on(void)
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{
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sysfs_set_int(sysfs_bl_power, 0);
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}
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void backlight_hw_off(void)
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{
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sysfs_set_int(sysfs_bl_power, 1);
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}
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void backlight_hw_brightness(int brightness)
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{
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/* cap range, just in case */
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if (brightness > MAX_BRIGHTNESS_SETTING)
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brightness = MAX_BRIGHTNESS_SETTING;
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if (brightness < MIN_BRIGHTNESS_SETTING)
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brightness = MIN_BRIGHTNESS_SETTING;
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sysfs_set_int(sysfs_bl_brightness, brightness);
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}
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