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/i2c/twl4030.h>
27 #include <mach/gpio.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 omap_request_gpio(LCD_PANEL_LR);
58 omap_request_gpio(LCD_PANEL_UD);
59 omap_request_gpio(LCD_PANEL_INI);
60 omap_request_gpio(LCD_PANEL_RESB);
61 omap_request_gpio(LCD_PANEL_QVGA);
63 omap_set_gpio_direction(LCD_PANEL_LR, 0);
64 omap_set_gpio_direction(LCD_PANEL_UD, 0);
65 omap_set_gpio_direction(LCD_PANEL_INI, 0);
66 omap_set_gpio_direction(LCD_PANEL_RESB, 0);
67 omap_set_gpio_direction(LCD_PANEL_QVGA, 0);
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);
74 gpio_set_value(LCD_PANEL_RESB, 1);
75 gpio_set_value(LCD_PANEL_INI, 1);
76 gpio_set_value(LCD_PANEL_QVGA, 0);
77 gpio_set_value(LCD_PANEL_LR, 1);
78 gpio_set_value(LCD_PANEL_UD, 1);
83 static void omap3evm_panel_cleanup(struct lcd_panel *panel)
87 static int omap3evm_panel_enable(struct lcd_panel *panel)
89 gpio_set_value(LCD_PANEL_ENABLE_GPIO, 0);
93 static void omap3evm_panel_disable(struct lcd_panel *panel)
95 gpio_set_value(LCD_PANEL_ENABLE_GPIO, 1);
98 static unsigned long omap3evm_panel_get_caps(struct lcd_panel *panel)
103 static int omap3evm_bklight_setlevel(struct lcd_panel *panel,
107 if ((level >= 0) && (level <= 100)) {
108 c = (125 * (100 - level)) / 100 + 2;
109 twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, c, TWL_PWMA_PWMAOFF);
110 bklight_level = level;
115 static unsigned int omap3evm_bklight_getlevel(struct lcd_panel *panel)
117 return bklight_level;
120 static unsigned int omap3evm_bklight_getmaxlevel(struct lcd_panel *panel)
125 struct lcd_panel omap3evm_panel = {
127 .config = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
134 .hsw = 3, /* hsync_len (4) - 1 */
135 .hfp = 3, /* right_margin (4) - 1 */
136 .hbp = 39, /* left_margin (40) - 1 */
137 .vsw = 1, /* vsync_len (2) - 1 */
138 .vfp = 2, /* lower_margin */
139 .vbp = 7, /* upper_margin (8) - 1 */
141 .pixel_clock = LCD_PIXCLOCK,
143 .init = omap3evm_panel_init,
144 .cleanup = omap3evm_panel_cleanup,
145 .enable = omap3evm_panel_enable,
146 .disable = omap3evm_panel_disable,
147 .get_caps = omap3evm_panel_get_caps,
148 .set_bklight_level = omap3evm_bklight_setlevel,
149 .get_bklight_level = omap3evm_bklight_getlevel,
150 .get_bklight_max = omap3evm_bklight_getmaxlevel,
153 static int omap3evm_panel_probe(struct platform_device *pdev)
155 omapfb_register_panel(&omap3evm_panel);
159 static int omap3evm_panel_remove(struct platform_device *pdev)
164 static int omap3evm_panel_suspend(struct platform_device *pdev,
170 static int omap3evm_panel_resume(struct platform_device *pdev)
175 struct platform_driver omap3evm_panel_driver = {
176 .probe = omap3evm_panel_probe,
177 .remove = omap3evm_panel_remove,
178 .suspend = omap3evm_panel_suspend,
179 .resume = omap3evm_panel_resume,
181 .name = "omap3evm_lcd",
182 .owner = THIS_MODULE,
186 static int __init omap3evm_panel_drv_init(void)
188 return platform_driver_register(&omap3evm_panel_driver);
191 static void __exit omap3evm_panel_drv_exit(void)
193 platform_driver_unregister(&omap3evm_panel_driver);
196 module_init(omap3evm_panel_drv_init);
197 module_exit(omap3evm_panel_drv_exit);