2 * LCD panel support for the MISTRAL OMAP2EVM board
4 * Author: Arun C <arunedarath@mistralsolutions.com>
6 * Derived from drivers/video/omap/lcd_omap3evm.c
7 * Derived from drivers/video/omap/lcd-apollon.c
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 #include <linux/module.h>
25 #include <linux/platform_device.h>
26 #include <linux/i2c/twl4030.h>
28 #include <mach/gpio.h>
30 #include <mach/omapfb.h>
31 #include <asm/mach-types.h>
33 #define LCD_PANEL_ENABLE_GPIO 154
34 #define LCD_PANEL_LR 128
35 #define LCD_PANEL_UD 129
36 #define LCD_PANEL_INI 152
37 #define LCD_PANEL_QVGA 148
38 #define LCD_PANEL_RESB 153
42 #define LCD_PIXCLOCK_MAX 20000 /* in kHz */
44 #define TWL_LED_LEDEN 0x00
45 #define TWL_PWMA_PWMAON 0x00
46 #define TWL_PWMA_PWMAOFF 0x01
48 static unsigned int bklight_level;
50 static int omap2evm_panel_init(struct lcd_panel *panel,
51 struct omapfb_device *fbdev)
53 omap_request_gpio(LCD_PANEL_ENABLE_GPIO);
54 omap_request_gpio(LCD_PANEL_LR);
55 omap_request_gpio(LCD_PANEL_UD);
56 omap_request_gpio(LCD_PANEL_INI);
57 omap_request_gpio(LCD_PANEL_QVGA);
58 omap_request_gpio(LCD_PANEL_RESB);
60 omap_set_gpio_direction(LCD_PANEL_ENABLE_GPIO, 0);
61 omap_set_gpio_direction(LCD_PANEL_LR, 0);
62 omap_set_gpio_direction(LCD_PANEL_UD, 0);
63 omap_set_gpio_direction(LCD_PANEL_INI, 0);
64 omap_set_gpio_direction(LCD_PANEL_QVGA, 0);
65 omap_set_gpio_direction(LCD_PANEL_RESB, 0);
67 omap_set_gpio_dataout(LCD_PANEL_RESB, 1);
68 omap_set_gpio_dataout(LCD_PANEL_INI, 1);
69 omap_set_gpio_dataout(LCD_PANEL_QVGA, 0);
70 omap_set_gpio_dataout(LCD_PANEL_LR, 1);
71 omap_set_gpio_dataout(LCD_PANEL_UD, 1);
73 twl4030_i2c_write_u8(TWL4030_MODULE_LED, 0x11, TWL_LED_LEDEN);
74 twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x01, TWL_PWMA_PWMAON);
75 twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x02, TWL_PWMA_PWMAOFF);
81 static void omap2evm_panel_cleanup(struct lcd_panel *panel)
85 static int omap2evm_panel_enable(struct lcd_panel *panel)
87 omap_set_gpio_dataout(LCD_PANEL_ENABLE_GPIO, 0);
91 static void omap2evm_panel_disable(struct lcd_panel *panel)
93 omap_set_gpio_dataout(LCD_PANEL_ENABLE_GPIO, 1);
96 static unsigned long omap2evm_panel_get_caps(struct lcd_panel *panel)
101 static int omap2evm_bklight_setlevel(struct lcd_panel *panel,
105 if ((level >= 0) && (level <= 100)) {
106 c = (125 * (100 - level)) / 100 + 2;
107 twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, c, TWL_PWMA_PWMAOFF);
108 bklight_level = level;
113 static unsigned int omap2evm_bklight_getlevel(struct lcd_panel *panel)
115 return bklight_level;
118 static unsigned int omap2evm_bklight_getmaxlevel(struct lcd_panel *panel)
123 struct lcd_panel omap2evm_panel = {
125 .config = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
139 .pixel_clock = LCD_PIXCLOCK_MAX,
141 .init = omap2evm_panel_init,
142 .cleanup = omap2evm_panel_cleanup,
143 .enable = omap2evm_panel_enable,
144 .disable = omap2evm_panel_disable,
145 .get_caps = omap2evm_panel_get_caps,
146 .set_bklight_level = omap2evm_bklight_setlevel,
147 .get_bklight_level = omap2evm_bklight_getlevel,
148 .get_bklight_max = omap2evm_bklight_getmaxlevel,
151 static int omap2evm_panel_probe(struct platform_device *pdev)
153 omapfb_register_panel(&omap2evm_panel);
157 static int omap2evm_panel_remove(struct platform_device *pdev)
162 static int omap2evm_panel_suspend(struct platform_device *pdev,
168 static int omap2evm_panel_resume(struct platform_device *pdev)
173 struct platform_driver omap2evm_panel_driver = {
174 .probe = omap2evm_panel_probe,
175 .remove = omap2evm_panel_remove,
176 .suspend = omap2evm_panel_suspend,
177 .resume = omap2evm_panel_resume,
179 .name = "omap2evm_lcd",
180 .owner = THIS_MODULE,
184 static int __init omap2evm_panel_drv_init(void)
186 return platform_driver_register(&omap2evm_panel_driver);
189 static void __exit omap2evm_panel_drv_exit(void)
191 platform_driver_unregister(&omap2evm_panel_driver);
194 module_init(omap2evm_panel_drv_init);
195 module_exit(omap2evm_panel_drv_exit);