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9d200153 SM |
1 | /* Copyright (c) 2008-2009, Code Aurora Forum. All rights reserved. |
2 | * | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License version 2 and | |
5 | * only version 2 as published by the Free Software Foundation. | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public License | |
13 | * along with this program; if not, write to the Free Software | |
14 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
15 | * 02110-1301, USA. | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/moduleparam.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/fb.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/version.h> | |
25 | #include <linux/backlight.h> | |
26 | ||
27 | #include "msm_fb.h" | |
28 | ||
29 | static int msm_fb_bl_get_brightness(struct backlight_device *pbd) | |
30 | { | |
31 | return pbd->props.brightness; | |
32 | } | |
33 | ||
34 | static int msm_fb_bl_update_status(struct backlight_device *pbd) | |
35 | { | |
36 | struct msm_fb_data_type *mfd = bl_get_data(pbd); | |
37 | __u32 bl_lvl; | |
38 | ||
39 | bl_lvl = pbd->props.brightness; | |
40 | bl_lvl = mfd->fbi->bl_curve[bl_lvl]; | |
41 | msm_fb_set_backlight(mfd, bl_lvl, 1); | |
42 | return 0; | |
43 | } | |
44 | ||
45 | static struct backlight_ops msm_fb_bl_ops = { | |
46 | .get_brightness = msm_fb_bl_get_brightness, | |
47 | .update_status = msm_fb_bl_update_status, | |
48 | }; | |
49 | ||
50 | void msm_fb_config_backlight(struct msm_fb_data_type *mfd) | |
51 | { | |
52 | struct msm_fb_panel_data *pdata; | |
53 | struct backlight_device *pbd; | |
54 | struct fb_info *fbi; | |
55 | char name[16]; | |
56 | ||
57 | fbi = mfd->fbi; | |
58 | pdata = (struct msm_fb_panel_data *)mfd->pdev->dev.platform_data; | |
59 | ||
60 | if ((pdata) && (pdata->set_backlight)) { | |
61 | snprintf(name, sizeof(name), "msmfb_bl%d", mfd->index); | |
62 | pbd = | |
63 | backlight_device_register(name, fbi->dev, mfd, | |
64 | &msm_fb_bl_ops); | |
65 | if (!IS_ERR(pbd)) { | |
66 | fbi->bl_dev = pbd; | |
67 | fb_bl_default_curve(fbi, | |
68 | 0, | |
69 | mfd->panel_info.bl_min, | |
70 | mfd->panel_info.bl_max); | |
71 | pbd->props.max_brightness = FB_BACKLIGHT_LEVELS - 1; | |
72 | pbd->props.brightness = FB_BACKLIGHT_LEVELS - 1; | |
73 | backlight_update_status(pbd); | |
74 | } else { | |
75 | fbi->bl_dev = NULL; | |
76 | printk(KERN_ERR "msm_fb: backlight_device_register failed!\n"); | |
77 | } | |
78 | } | |
79 | } |