67 lines
2 KiB
C
67 lines
2 KiB
C
|
/***************************************************************************
|
||
|
|
* __________ __ ___.
|
||
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
||
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
||
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
||
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
||
|
|
* \/ \/ \/ \/ \/
|
||
|
|
* $Id$
|
||
|
|
*
|
||
|
|
* Copyright (C) 2011 by Amaury Pouly
|
||
|
|
*
|
||
|
|
* 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 "config.h"
|
||
|
|
#include "system.h"
|
||
|
|
#include "lcd.h"
|
||
|
|
#include "backlight.h"
|
||
|
|
#include "backlight-target.h"
|
||
|
|
#include "pinctrl-imx233.h"
|
||
|
|
|
||
|
|
void _backlight_set_brightness(int brightness)
|
||
|
|
{
|
||
|
|
imx233_set_gpio_output(1, 28, false);
|
||
|
|
udelay(600);
|
||
|
|
while(brightness-- > 0)
|
||
|
|
{
|
||
|
|
imx233_set_gpio_output(1, 28, false);
|
||
|
|
imx233_set_gpio_output(1, 28, true);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
bool _backlight_init(void)
|
||
|
|
{
|
||
|
|
imx233_set_pin_function(1, 28, PINCTRL_FUNCTION_GPIO);
|
||
|
|
imx233_set_pin_drive_strength(1, 28, PINCTRL_DRIVE_8mA);
|
||
|
|
imx233_enable_gpio_output(1, 28, true);
|
||
|
|
imx233_set_gpio_output(1, 29, true);
|
||
|
|
udelay(600);
|
||
|
|
_backlight_set_brightness(100);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
void _backlight_on(void)
|
||
|
|
{
|
||
|
|
#ifdef HAVE_LCD_ENABLE
|
||
|
|
lcd_enable(true); /* power on lcd + visible display */
|
||
|
|
#endif
|
||
|
|
/* don't do anything special, the core will set the brightness */
|
||
|
|
}
|
||
|
|
|
||
|
|
void _backlight_off(void)
|
||
|
|
{
|
||
|
|
/* there is no real on/off but we can set to 0 brightness */
|
||
|
|
_backlight_set_brightness(0);
|
||
|
|
#ifdef HAVE_LCD_ENABLE
|
||
|
|
lcd_enable(false); /* power off visible display */
|
||
|
|
#endif
|
||
|
|
}
|