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