2 * LCD panel support for the TI OMAP3 EVM board
4 * Author: Steve Sakoman <steve@sakoman.com>
6 * Derived from drivers/video/omap/lcd-apollon.c
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 #include <linux/module.h>
24 #include <linux/platform_device.h>
25 #include <linux/gpio.h>
26 #include <linux/i2c/twl4030.h>
29 #include <mach/omapfb.h>
30 #include <asm/mach-types.h>
32 #define LCD_PANEL_ENABLE_GPIO 153
33 #define LCD_PANEL_LR 2
34 #define LCD_PANEL_UD 3
35 #define LCD_PANEL_INI 152
36 #define LCD_PANEL_QVGA 154
37 #define LCD_PANEL_RESB 155
41 #define LCD_PIXCLOCK 26000 /* in kHz */
43 #define ENABLE_VDAC_DEDICATED 0x03
44 #define ENABLE_VDAC_DEV_GRP 0x20
45 #define ENABLE_VPLL2_DEDICATED 0x05
46 #define ENABLE_VPLL2_DEV_GRP 0xE0
48 #define TWL_LED_LEDEN 0x00
49 #define TWL_PWMA_PWMAON 0x00
50 #define TWL_PWMA_PWMAOFF 0x01
52 static unsigned int bklight_level;
54 static int omap3evm_panel_init(struct lcd_panel *panel,
55 struct omapfb_device *fbdev)
57 gpio_request(LCD_PANEL_LR, "LCD lr");
58 gpio_request(LCD_PANEL_UD, "LCD ud");
59 gpio_request(LCD_PANEL_INI, "LCD ini");
60 gpio_request(LCD_PANEL_RESB, "LCD resb");
61 gpio_request(LCD_PANEL_QVGA, "LCD qvga");
63 gpio_direction_output(LCD_PANEL_RESB, 1);
64 gpio_direction_output(LCD_PANEL_INI, 1);
65 gpio_direction_output(LCD_PANEL_QVGA, 0);
66 gpio_direction_output(LCD_PANEL_LR, 1);
67 gpio_direction_output(LCD_PANEL_UD, 1);
69 twl4030_i2c_write_u8(TWL4030_MODULE_LED, 0x11, TWL_LED_LEDEN);
70 twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x01, TWL_PWMA_PWMAON);
71 twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x02, TWL_PWMA_PWMAOFF);
77 static void omap3evm_panel_cleanup(struct lcd_panel *panel)
81 static int omap3evm_panel_enable(struct lcd_panel *panel)
83 gpio_set_value(LCD_PANEL_ENABLE_GPIO, 0);
87 static void omap3evm_panel_disable(struct lcd_panel *panel)
89 gpio_set_value(LCD_PANEL_ENABLE_GPIO, 1);
92 static unsigned long omap3evm_panel_get_caps(struct lcd_panel *panel)
97 static int omap3evm_bklight_setlevel(struct lcd_panel *panel,
101 if ((level >= 0) && (level <= 100)) {
102 c = (125 * (100 - level)) / 100 + 2;
103 twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, c, TWL_PWMA_PWMAOFF);
104 bklight_level = level;
109 static unsigned int omap3evm_bklight_getlevel(struct lcd_panel *panel)
111 return bklight_level;
114 static unsigned int omap3evm_bklight_getmaxlevel(struct lcd_panel *panel)
119 struct lcd_panel omap3evm_panel = {
121 .config = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
128 .hsw = 3, /* hsync_len (4) - 1 */
129 .hfp = 3, /* right_margin (4) - 1 */
130 .hbp = 39, /* left_margin (40) - 1 */
131 .vsw = 1, /* vsync_len (2) - 1 */
132 .vfp = 2, /* lower_margin */
133 .vbp = 7, /* upper_margin (8) - 1 */
135 .pixel_clock = LCD_PIXCLOCK,
137 .init = omap3evm_panel_init,
138 .cleanup = omap3evm_panel_cleanup,
139 .enable = omap3evm_panel_enable,
140 .disable = omap3evm_panel_disable,
141 .get_caps = omap3evm_panel_get_caps,
142 .set_bklight_level = omap3evm_bklight_setlevel,
143 .get_bklight_level = omap3evm_bklight_getlevel,
144 .get_bklight_max = omap3evm_bklight_getmaxlevel,
147 static int omap3evm_panel_probe(struct platform_device *pdev)
149 omapfb_register_panel(&omap3evm_panel);
153 static int omap3evm_panel_remove(struct platform_device *pdev)
158 static int omap3evm_panel_suspend(struct platform_device *pdev,
164 static int omap3evm_panel_resume(struct platform_device *pdev)
169 struct platform_driver omap3evm_panel_driver = {
170 .probe = omap3evm_panel_probe,
171 .remove = omap3evm_panel_remove,
172 .suspend = omap3evm_panel_suspend,
173 .resume = omap3evm_panel_resume,
175 .name = "omap3evm_lcd",
176 .owner = THIS_MODULE,
180 static int __init omap3evm_panel_drv_init(void)
182 return platform_driver_register(&omap3evm_panel_driver);
185 static void __exit omap3evm_panel_drv_exit(void)
187 platform_driver_unregister(&omap3evm_panel_driver);
190 module_init(omap3evm_panel_drv_init);
191 module_exit(omap3evm_panel_drv_exit);