1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/***************************************************************************
* __________ __ ___.
* 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)
{
if(brightness != 0)
brightness = 32 - (brightness * 32) / 100;
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_pinctrl_acquire_pin(1, 28, "backlight");
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);
_backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
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
}
|
