diff options
-rw-r--r-- | drivers/video/backlight/Kconfig | 9 | ||||
-rw-r--r-- | drivers/video/backlight/Makefile | 1 | ||||
-rw-r--r-- | drivers/video/backlight/omap1_bl.c | 210 |
3 files changed, 220 insertions, 0 deletions
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index 924e2551044a..dcd8073c2369 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig | |||
@@ -80,6 +80,15 @@ config BACKLIGHT_LOCOMO | |||
80 | If you have a Sharp Zaurus SL-5500 (Collie) or SL-5600 (Poodle) say y to | 80 | If you have a Sharp Zaurus SL-5500 (Collie) or SL-5600 (Poodle) say y to |
81 | enable the LCD/backlight driver. | 81 | enable the LCD/backlight driver. |
82 | 82 | ||
83 | config BACKLIGHT_OMAP1 | ||
84 | tristate "OMAP1 PWL-based LCD Backlight" | ||
85 | depends on BACKLIGHT_CLASS_DEVICE && ARCH_OMAP1 | ||
86 | default y | ||
87 | help | ||
88 | This driver controls the LCD backlight level and power for | ||
89 | the PWL module of OMAP1 processors. Say Y if your board | ||
90 | uses this hardware. | ||
91 | |||
83 | config BACKLIGHT_HP680 | 92 | config BACKLIGHT_HP680 |
84 | tristate "HP Jornada 680 Backlight Driver" | 93 | tristate "HP Jornada 680 Backlight Driver" |
85 | depends on BACKLIGHT_CLASS_DEVICE && SH_HP6XX | 94 | depends on BACKLIGHT_CLASS_DEVICE && SH_HP6XX |
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index 965a78b18118..33f6c7cecc73 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile | |||
@@ -7,5 +7,6 @@ obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o | |||
7 | obj-$(CONFIG_BACKLIGHT_CORGI) += corgi_bl.o | 7 | obj-$(CONFIG_BACKLIGHT_CORGI) += corgi_bl.o |
8 | obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o | 8 | obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o |
9 | obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o | 9 | obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o |
10 | obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o | ||
10 | obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o | 11 | obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o |
11 | obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o | 12 | obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o |
diff --git a/drivers/video/backlight/omap1_bl.c b/drivers/video/backlight/omap1_bl.c new file mode 100644 index 000000000000..891875d53a49 --- /dev/null +++ b/drivers/video/backlight/omap1_bl.c | |||
@@ -0,0 +1,210 @@ | |||
1 | /* | ||
2 | * Backlight driver for OMAP based boards. | ||
3 | * | ||
4 | * Copyright (c) 2006 Andrzej Zaborowski <balrog@zabor.org> | ||
5 | * | ||
6 | * This package is free software; you can redistribute it and/or modify | ||
7 | * it under the terms of the GNU General Public License as published by | ||
8 | * the Free Software Foundation; either version 2 of the License, or | ||
9 | * (at your option) any later version. | ||
10 | * | ||
11 | * This package is distributed in the hope that it will be useful, | ||
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
14 | * GNU General Public License for more details. | ||
15 | * | ||
16 | * You should have received a copy of the GNU General Public License | ||
17 | * along with this package; if not, write to the Free Software | ||
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
19 | */ | ||
20 | |||
21 | #include <linux/module.h> | ||
22 | #include <linux/kernel.h> | ||
23 | #include <linux/init.h> | ||
24 | #include <linux/platform_device.h> | ||
25 | #include <linux/fb.h> | ||
26 | #include <linux/backlight.h> | ||
27 | |||
28 | #include <asm/arch/hardware.h> | ||
29 | #include <asm/arch/board.h> | ||
30 | #include <asm/arch/mux.h> | ||
31 | |||
32 | #define OMAPBL_MAX_INTENSITY 0xff | ||
33 | |||
34 | struct omap_backlight { | ||
35 | int powermode; | ||
36 | int current_intensity; | ||
37 | |||
38 | struct device *dev; | ||
39 | struct omap_backlight_config *pdata; | ||
40 | }; | ||
41 | |||
42 | static void inline omapbl_send_intensity(int intensity) | ||
43 | { | ||
44 | omap_writeb(intensity, OMAP_PWL_ENABLE); | ||
45 | } | ||
46 | |||
47 | static void inline omapbl_send_enable(int enable) | ||
48 | { | ||
49 | omap_writeb(enable, OMAP_PWL_CLK_ENABLE); | ||
50 | } | ||
51 | |||
52 | static void omapbl_blank(struct omap_backlight *bl, int mode) | ||
53 | { | ||
54 | if (bl->pdata->set_power) | ||
55 | bl->pdata->set_power(bl->dev, mode); | ||
56 | |||
57 | switch (mode) { | ||
58 | case FB_BLANK_NORMAL: | ||
59 | case FB_BLANK_VSYNC_SUSPEND: | ||
60 | case FB_BLANK_HSYNC_SUSPEND: | ||
61 | case FB_BLANK_POWERDOWN: | ||
62 | omapbl_send_intensity(0); | ||
63 | omapbl_send_enable(0); | ||
64 | break; | ||
65 | |||
66 | case FB_BLANK_UNBLANK: | ||
67 | omapbl_send_intensity(bl->current_intensity); | ||
68 | omapbl_send_enable(1); | ||
69 | break; | ||
70 | } | ||
71 | } | ||
72 | |||
73 | #ifdef CONFIG_PM | ||
74 | static int omapbl_suspend(struct platform_device *pdev, pm_message_t state) | ||
75 | { | ||
76 | struct backlight_device *dev = platform_get_drvdata(pdev); | ||
77 | struct omap_backlight *bl = dev_get_drvdata(&dev->dev); | ||
78 | |||
79 | omapbl_blank(bl, FB_BLANK_POWERDOWN); | ||
80 | return 0; | ||
81 | } | ||
82 | |||
83 | static int omapbl_resume(struct platform_device *pdev) | ||
84 | { | ||
85 | struct backlight_device *dev = platform_get_drvdata(pdev); | ||
86 | struct omap_backlight *bl = dev_get_drvdata(&dev->dev); | ||
87 | |||
88 | omapbl_blank(bl, bl->powermode); | ||
89 | return 0; | ||
90 | } | ||
91 | #else | ||
92 | #define omapbl_suspend NULL | ||
93 | #define omapbl_resume NULL | ||
94 | #endif | ||
95 | |||
96 | static int omapbl_set_power(struct backlight_device *dev, int state) | ||
97 | { | ||
98 | struct omap_backlight *bl = dev_get_drvdata(&dev->dev); | ||
99 | |||
100 | omapbl_blank(bl, state); | ||
101 | bl->powermode = state; | ||
102 | |||
103 | return 0; | ||
104 | } | ||
105 | |||
106 | static int omapbl_update_status(struct backlight_device *dev) | ||
107 | { | ||
108 | struct omap_backlight *bl = dev_get_drvdata(&dev->dev); | ||
109 | |||
110 | if (bl->current_intensity != dev->props.brightness) { | ||
111 | if (bl->powermode == FB_BLANK_UNBLANK) | ||
112 | omapbl_send_intensity(dev->props.brightness); | ||
113 | bl->current_intensity = dev->props.brightness; | ||
114 | } | ||
115 | |||
116 | if (dev->props.fb_blank != bl->powermode) | ||
117 | omapbl_set_power(dev, dev->props.fb_blank); | ||
118 | |||
119 | return 0; | ||
120 | } | ||
121 | |||
122 | static int omapbl_get_intensity(struct backlight_device *dev) | ||
123 | { | ||
124 | struct omap_backlight *bl = dev_get_drvdata(&dev->dev); | ||
125 | return bl->current_intensity; | ||
126 | } | ||
127 | |||
128 | static struct backlight_ops omapbl_ops = { | ||
129 | .get_brightness = omapbl_get_intensity, | ||
130 | .update_status = omapbl_update_status, | ||
131 | }; | ||
132 | |||
133 | static int omapbl_probe(struct platform_device *pdev) | ||
134 | { | ||
135 | struct backlight_device *dev; | ||
136 | struct omap_backlight *bl; | ||
137 | struct omap_backlight_config *pdata = pdev->dev.platform_data; | ||
138 | |||
139 | if (!pdata) | ||
140 | return -ENXIO; | ||
141 | |||
142 | omapbl_ops.check_fb = pdata->check_fb; | ||
143 | |||
144 | bl = kzalloc(sizeof(struct omap_backlight), GFP_KERNEL); | ||
145 | if (unlikely(!bl)) | ||
146 | return -ENOMEM; | ||
147 | |||
148 | dev = backlight_device_register("omap-bl", &pdev->dev, bl, &omapbl_ops); | ||
149 | if (IS_ERR(dev)) { | ||
150 | kfree(bl); | ||
151 | return PTR_ERR(dev); | ||
152 | } | ||
153 | |||
154 | bl->powermode = FB_BLANK_POWERDOWN; | ||
155 | bl->current_intensity = 0; | ||
156 | |||
157 | bl->pdata = pdata; | ||
158 | bl->dev = &pdev->dev; | ||
159 | |||
160 | platform_set_drvdata(pdev, dev); | ||
161 | |||
162 | omap_cfg_reg(PWL); /* Conflicts with UART3 */ | ||
163 | |||
164 | dev->props.fb_blank = FB_BLANK_UNBLANK; | ||
165 | dev->props.max_brightness = OMAPBL_MAX_INTENSITY; | ||
166 | dev->props.brightness = pdata->default_intensity; | ||
167 | omapbl_update_status(dev); | ||
168 | |||
169 | printk(KERN_INFO "OMAP LCD backlight initialised\n"); | ||
170 | |||
171 | return 0; | ||
172 | } | ||
173 | |||
174 | static int omapbl_remove(struct platform_device *pdev) | ||
175 | { | ||
176 | struct backlight_device *dev = platform_get_drvdata(pdev); | ||
177 | struct omap_backlight *bl = dev_get_drvdata(&dev->dev); | ||
178 | |||
179 | backlight_device_unregister(dev); | ||
180 | kfree(bl); | ||
181 | |||
182 | return 0; | ||
183 | } | ||
184 | |||
185 | static struct platform_driver omapbl_driver = { | ||
186 | .probe = omapbl_probe, | ||
187 | .remove = omapbl_remove, | ||
188 | .suspend = omapbl_suspend, | ||
189 | .resume = omapbl_resume, | ||
190 | .driver = { | ||
191 | .name = "omap-bl", | ||
192 | }, | ||
193 | }; | ||
194 | |||
195 | static int __init omapbl_init(void) | ||
196 | { | ||
197 | return platform_driver_register(&omapbl_driver); | ||
198 | } | ||
199 | |||
200 | static void __exit omapbl_exit(void) | ||
201 | { | ||
202 | platform_driver_unregister(&omapbl_driver); | ||
203 | } | ||
204 | |||
205 | module_init(omapbl_init); | ||
206 | module_exit(omapbl_exit); | ||
207 | |||
208 | MODULE_AUTHOR("Andrzej Zaborowski <balrog@zabor.org>"); | ||
209 | MODULE_DESCRIPTION("OMAP LCD Backlight driver"); | ||
210 | MODULE_LICENSE("GPL"); | ||