diff options
Diffstat (limited to 'firmware/target/hosted/agptek/backlight-agptek.c')
-rw-r--r-- | firmware/target/hosted/agptek/backlight-agptek.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/firmware/target/hosted/agptek/backlight-agptek.c b/firmware/target/hosted/agptek/backlight-agptek.c new file mode 100644 index 0000000000..2f00787f72 --- /dev/null +++ b/firmware/target/hosted/agptek/backlight-agptek.c | |||
@@ -0,0 +1,64 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___ | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * | ||
9 | * Copyright (C) 2017 Marcin Bukat | ||
10 | * | ||
11 | * This program is free software; you can redistribute it and/or | ||
12 | * modify it under the terms of the GNU General Public License | ||
13 | * as published by the Free Software Foundation; either version 2 | ||
14 | * of the License, or (at your option) any later version. | ||
15 | * | ||
16 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
17 | * KIND, either express or implied. | ||
18 | * | ||
19 | ****************************************************************************/ | ||
20 | #include <sys/types.h> | ||
21 | #include <sys/stat.h> | ||
22 | #include <fcntl.h> | ||
23 | #include <stdbool.h> | ||
24 | #include <unistd.h> | ||
25 | #include <string.h> | ||
26 | #include <stdio.h> | ||
27 | #include "config.h" | ||
28 | #include "backlight-target.h" | ||
29 | #include "sysfs.h" | ||
30 | #include "panic.h" | ||
31 | |||
32 | static const char * const sysfs_bl_brightness = | ||
33 | "/sys/class/backlight/pwm-backlight.0/brightness"; | ||
34 | |||
35 | static const char * const sysfs_bl_power = | ||
36 | "/sys/class/backlight/pwm-backlight.0/bl_power"; | ||
37 | |||
38 | bool backlight_hw_init(void) | ||
39 | { | ||
40 | backlight_hw_on(); | ||
41 | backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING); | ||
42 | return true; | ||
43 | } | ||
44 | |||
45 | void backlight_hw_on(void) | ||
46 | { | ||
47 | sysfs_set_int(sysfs_bl_power, 0); | ||
48 | } | ||
49 | |||
50 | void backlight_hw_off(void) | ||
51 | { | ||
52 | sysfs_set_int(sysfs_bl_power, 1); | ||
53 | } | ||
54 | |||
55 | void backlight_hw_brightness(int brightness) | ||
56 | { | ||
57 | /* cap range, just in case */ | ||
58 | if (brightness > MAX_BRIGHTNESS_SETTING) | ||
59 | brightness = MAX_BRIGHTNESS_SETTING; | ||
60 | if (brightness < MIN_BRIGHTNESS_SETTING) | ||
61 | brightness = MIN_BRIGHTNESS_SETTING; | ||
62 | |||
63 | sysfs_set_int(sysfs_bl_brightness, brightness); | ||
64 | } | ||