omapfb: add support for the OMAP2EVM LCD

omap2evm LCD supports VGA and QVGA resolution, by default its in VGA mode.
Fixed-by: NJarkko Nikula <jarkko.nikula@gmail.com>
Fixed-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NArun C <arunedarath@mistralsolutions.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NImre Deak <imre.deak@nokia.com>
Acked-by: NKrzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/video/omap/Makefile

@@ -27,6 +27,7 @@ objs-y$(CONFIG_MACH_OMAP_OSK) += lcd_osk.o
 
 objs-y$(CONFIG_MACH_OMAP_APOLLON) += lcd_apollon.o
 objs-y$(CONFIG_MACH_OMAP_2430SDP) += lcd_2430sdp.o
+objs-y$(CONFIG_MACH_OMAP2EVM) += lcd_omap2evm.o
 objs-y$(CONFIG_FB_OMAP_LCD_MIPID) += lcd_mipid.o
 
 omapfb-objs := $(objs-yy)

drivers/video/omap/lcd_omap2evm.c

+/*
+ * LCD panel support for the MISTRAL OMAP2EVM board
+ *
+ * Author: Arun C <arunedarath@mistralsolutions.com>
+ *
+ * Derived from drivers/video/omap/lcd_omap3evm.c
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/i2c/twl4030.h>
+
+#include <mach/mux.h>
+#include <mach/omapfb.h>
+#include <asm/mach-types.h>
+
+#define LCD_PANEL_ENABLE_GPIO	154
+#define LCD_PANEL_LR		128
+#define LCD_PANEL_UD		129
+#define LCD_PANEL_INI		152
+#define LCD_PANEL_QVGA		148
+#define LCD_PANEL_RESB		153
+
+#define TWL_LED_LEDEN		0x00
+#define TWL_PWMA_PWMAON		0x00
+#define TWL_PWMA_PWMAOFF	0x01
+
+static unsigned int bklight_level;
+
+static int omap2evm_panel_init(struct lcd_panel *panel,
+				struct omapfb_device *fbdev)
+{
+	gpio_request(LCD_PANEL_ENABLE_GPIO, "LCD enable");
+	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_QVGA, "LCD qvga");
+	gpio_request(LCD_PANEL_RESB, "LCD resb");
+
+	gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 1);
+	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);
+
+	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;
+
+	return 0;
+}
+
+static void omap2evm_panel_cleanup(struct lcd_panel *panel)
+{
+	gpio_free(LCD_PANEL_RESB);
+	gpio_free(LCD_PANEL_QVGA);
+	gpio_free(LCD_PANEL_INI);
+	gpio_free(LCD_PANEL_UD);
+	gpio_free(LCD_PANEL_LR);
+	gpio_free(LCD_PANEL_ENABLE_GPIO);
+}
+
+static int omap2evm_panel_enable(struct lcd_panel *panel)
+{
+	gpio_set_value(LCD_PANEL_ENABLE_GPIO, 0);
+	return 0;
+}
+
+static void omap2evm_panel_disable(struct lcd_panel *panel)
+{
+	gpio_set_value(LCD_PANEL_ENABLE_GPIO, 1);
+}
+
+static unsigned long omap2evm_panel_get_caps(struct lcd_panel *panel)
+{
+	return 0;
+}
+
+static int omap2evm_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;
+}
+
+static unsigned int omap2evm_bklight_getlevel(struct lcd_panel *panel)
+{
+	return bklight_level;
+}
+
+static unsigned int omap2evm_bklight_getmaxlevel(struct lcd_panel *panel)
+{
+	return 100;
+}
+
+struct lcd_panel omap2evm_panel = {
+	.name		= "omap2evm",
+	.config		= OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
+			  OMAP_LCDC_INV_HSYNC,
+
+	.bpp		= 16,
+	.data_lines	= 18,
+	.x_res		= 480,
+	.y_res		= 640,
+	.hsw		= 3,
+	.hfp		= 0,
+	.hbp		= 28,
+	.vsw		= 2,
+	.vfp		= 1,
+	.vbp		= 0,
+
+	.pixel_clock	= 20000,
+
+	.init		= omap2evm_panel_init,
+	.cleanup	= omap2evm_panel_cleanup,
+	.enable		= omap2evm_panel_enable,
+	.disable	= omap2evm_panel_disable,
+	.get_caps	= omap2evm_panel_get_caps,
+	.set_bklight_level      = omap2evm_bklight_setlevel,
+	.get_bklight_level      = omap2evm_bklight_getlevel,
+	.get_bklight_max        = omap2evm_bklight_getmaxlevel,
+};
+
+static int omap2evm_panel_probe(struct platform_device *pdev)
+{
+	omapfb_register_panel(&omap2evm_panel);
+	return 0;
+}
+
+static int omap2evm_panel_remove(struct platform_device *pdev)
+{
+	return 0;
+}
+
+static int omap2evm_panel_suspend(struct platform_device *pdev,
+				   pm_message_t mesg)
+{
+	return 0;
+}
+
+static int omap2evm_panel_resume(struct platform_device *pdev)
+{
+	return 0;
+}
+
+struct platform_driver omap2evm_panel_driver = {
+	.probe		= omap2evm_panel_probe,
+	.remove		= omap2evm_panel_remove,
+	.suspend	= omap2evm_panel_suspend,
+	.resume		= omap2evm_panel_resume,
+	.driver		= {
+		.name	= "omap2evm_lcd",
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init omap2evm_panel_drv_init(void)
+{
+	return platform_driver_register(&omap2evm_panel_driver);
+}
+
+static void __exit omap2evm_panel_drv_exit(void)
+{
+	platform_driver_unregister(&omap2evm_panel_driver);
+}
+
+module_init(omap2evm_panel_drv_init);
+module_exit(omap2evm_panel_drv_exit);