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Steve Sakoman
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Linus Torvalds
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Sep 23, 2009
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refs/heads/master: fb49b78452503f6cdf8b243ccb40cda81aae9998 | ||
refs/heads/master: 2a8729c47a9dfe5c8ba55883b86b719b33e6e099 |
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/* | ||
* LCD panel support for the TI OMAP3 EVM board | ||
* | ||
* Author: Steve Sakoman <steve@sakoman.com> | ||
* | ||
* Derived from drivers/video/omap/lcd-apollon.c | ||
* | ||
* This program is free software; you can redistribute it and/or modify it | ||
* under the terms of the GNU General Public License as published by the | ||
* Free Software Foundation; either version 2 of the License, or (at your | ||
* option) any later version. | ||
* | ||
* This program is distributed in the hope that it will be useful, but | ||
* WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
* General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License along | ||
* with this program; if not, write to the Free Software Foundation, Inc., | ||
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | ||
*/ | ||
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#include <linux/module.h> | ||
#include <linux/platform_device.h> | ||
#include <linux/gpio.h> | ||
#include <linux/i2c/twl4030.h> | ||
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#include <mach/mux.h> | ||
#include <mach/omapfb.h> | ||
#include <asm/mach-types.h> | ||
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#define LCD_PANEL_ENABLE_GPIO 153 | ||
#define LCD_PANEL_LR 2 | ||
#define LCD_PANEL_UD 3 | ||
#define LCD_PANEL_INI 152 | ||
#define LCD_PANEL_QVGA 154 | ||
#define LCD_PANEL_RESB 155 | ||
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#define ENABLE_VDAC_DEDICATED 0x03 | ||
#define ENABLE_VDAC_DEV_GRP 0x20 | ||
#define ENABLE_VPLL2_DEDICATED 0x05 | ||
#define ENABLE_VPLL2_DEV_GRP 0xE0 | ||
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#define TWL_LED_LEDEN 0x00 | ||
#define TWL_PWMA_PWMAON 0x00 | ||
#define TWL_PWMA_PWMAOFF 0x01 | ||
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static unsigned int bklight_level; | ||
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static int omap3evm_panel_init(struct lcd_panel *panel, | ||
struct omapfb_device *fbdev) | ||
{ | ||
gpio_request(LCD_PANEL_LR, "LCD lr"); | ||
gpio_request(LCD_PANEL_UD, "LCD ud"); | ||
gpio_request(LCD_PANEL_INI, "LCD ini"); | ||
gpio_request(LCD_PANEL_RESB, "LCD resb"); | ||
gpio_request(LCD_PANEL_QVGA, "LCD qvga"); | ||
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gpio_direction_output(LCD_PANEL_RESB, 1); | ||
gpio_direction_output(LCD_PANEL_INI, 1); | ||
gpio_direction_output(LCD_PANEL_QVGA, 0); | ||
gpio_direction_output(LCD_PANEL_LR, 1); | ||
gpio_direction_output(LCD_PANEL_UD, 1); | ||
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twl4030_i2c_write_u8(TWL4030_MODULE_LED, 0x11, TWL_LED_LEDEN); | ||
twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x01, TWL_PWMA_PWMAON); | ||
twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x02, TWL_PWMA_PWMAOFF); | ||
bklight_level = 100; | ||
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return 0; | ||
} | ||
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static void omap3evm_panel_cleanup(struct lcd_panel *panel) | ||
{ | ||
gpio_free(LCD_PANEL_QVGA); | ||
gpio_free(LCD_PANEL_RESB); | ||
gpio_free(LCD_PANEL_INI); | ||
gpio_free(LCD_PANEL_UD); | ||
gpio_free(LCD_PANEL_LR); | ||
} | ||
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static int omap3evm_panel_enable(struct lcd_panel *panel) | ||
{ | ||
gpio_set_value(LCD_PANEL_ENABLE_GPIO, 0); | ||
return 0; | ||
} | ||
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static void omap3evm_panel_disable(struct lcd_panel *panel) | ||
{ | ||
gpio_set_value(LCD_PANEL_ENABLE_GPIO, 1); | ||
} | ||
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static unsigned long omap3evm_panel_get_caps(struct lcd_panel *panel) | ||
{ | ||
return 0; | ||
} | ||
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static int omap3evm_bklight_setlevel(struct lcd_panel *panel, | ||
unsigned int level) | ||
{ | ||
u8 c; | ||
if ((level >= 0) && (level <= 100)) { | ||
c = (125 * (100 - level)) / 100 + 2; | ||
twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, c, TWL_PWMA_PWMAOFF); | ||
bklight_level = level; | ||
} | ||
return 0; | ||
} | ||
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static unsigned int omap3evm_bklight_getlevel(struct lcd_panel *panel) | ||
{ | ||
return bklight_level; | ||
} | ||
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static unsigned int omap3evm_bklight_getmaxlevel(struct lcd_panel *panel) | ||
{ | ||
return 100; | ||
} | ||
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struct lcd_panel omap3evm_panel = { | ||
.name = "omap3evm", | ||
.config = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC | | ||
OMAP_LCDC_INV_HSYNC, | ||
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.bpp = 16, | ||
.data_lines = 18, | ||
.x_res = 480, | ||
.y_res = 640, | ||
.hsw = 3, /* hsync_len (4) - 1 */ | ||
.hfp = 3, /* right_margin (4) - 1 */ | ||
.hbp = 39, /* left_margin (40) - 1 */ | ||
.vsw = 1, /* vsync_len (2) - 1 */ | ||
.vfp = 2, /* lower_margin */ | ||
.vbp = 7, /* upper_margin (8) - 1 */ | ||
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.pixel_clock = 26000, | ||
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.init = omap3evm_panel_init, | ||
.cleanup = omap3evm_panel_cleanup, | ||
.enable = omap3evm_panel_enable, | ||
.disable = omap3evm_panel_disable, | ||
.get_caps = omap3evm_panel_get_caps, | ||
.set_bklight_level = omap3evm_bklight_setlevel, | ||
.get_bklight_level = omap3evm_bklight_getlevel, | ||
.get_bklight_max = omap3evm_bklight_getmaxlevel, | ||
}; | ||
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static int omap3evm_panel_probe(struct platform_device *pdev) | ||
{ | ||
omapfb_register_panel(&omap3evm_panel); | ||
return 0; | ||
} | ||
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static int omap3evm_panel_remove(struct platform_device *pdev) | ||
{ | ||
return 0; | ||
} | ||
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static int omap3evm_panel_suspend(struct platform_device *pdev, | ||
pm_message_t mesg) | ||
{ | ||
return 0; | ||
} | ||
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static int omap3evm_panel_resume(struct platform_device *pdev) | ||
{ | ||
return 0; | ||
} | ||
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struct platform_driver omap3evm_panel_driver = { | ||
.probe = omap3evm_panel_probe, | ||
.remove = omap3evm_panel_remove, | ||
.suspend = omap3evm_panel_suspend, | ||
.resume = omap3evm_panel_resume, | ||
.driver = { | ||
.name = "omap3evm_lcd", | ||
.owner = THIS_MODULE, | ||
}, | ||
}; | ||
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static int __init omap3evm_panel_drv_init(void) | ||
{ | ||
return platform_driver_register(&omap3evm_panel_driver); | ||
} | ||
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static void __exit omap3evm_panel_drv_exit(void) | ||
{ | ||
platform_driver_unregister(&omap3evm_panel_driver); | ||
} | ||
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module_init(omap3evm_panel_drv_init); | ||
module_exit(omap3evm_panel_drv_exit); |