drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c - kernel/msm-4.9 - Gitiles

 /*
  * Support for NEC-nl8048hl11-01b panel driver
  *
  * Copyright (C) 2010 Texas Instruments Inc.
  * Author: Erik Gilling <konkers@android.com>
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 as published by
  * the Free Software Foundation.
  *
  * 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, see <http://www.gnu.org/licenses/>.
  */

 #include <linux/module.h>
 #include <linux/delay.h>
 #include <linux/spi/spi.h>
 #include <linux/backlight.h>
 #include <linux/fb.h>

 #include <video/omapdss.h>

 #define LCD_XRES		800
 #define LCD_YRES		480
 /*
  * NEC PIX Clock Ratings
  * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
  */
 #define LCD_PIXEL_CLOCK		23800

 struct nec_8048_data {
 	struct backlight_device *bl;
 };

 static const struct {
 	unsigned char addr;
 	unsigned char dat;
 } nec_8048_init_seq[] = {
 	{ 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
 	{ 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
 	{ 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 },	{ 24, 0x25 },
 	{ 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
 	{ 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F },	{ 38, 0x0F },
 	{ 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 },	{ 43, 0x0F },
 	{ 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F },	{ 48, 0x0F },
 	{ 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
 	{ 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 },	{ 86, 0x14 },
 	{ 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 },	{ 93, 0x0C },
 	{ 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
 	{ 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
 	{ 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
 	{ 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
 	{ 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
 	{ 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
 	{ 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
 	{ 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
 };

 /*
  * NEC NL8048HL11-01B  Manual
  * defines HFB, HSW, HBP, VFP, VSW, VBP as shown below
  */

 static struct omap_video_timings nec_8048_panel_timings = {
 	/* 800 x 480 @ 60 Hz  Reduced blanking VESA CVT 0.31M3-R */
 	.x_res		= LCD_XRES,
 	.y_res		= LCD_YRES,
 	.pixel_clock	= LCD_PIXEL_CLOCK,
 	.hfp		= 6,
 	.hsw		= 1,
 	.hbp		= 4,
 	.vfp		= 3,
 	.vsw		= 1,
 	.vbp		= 4,

 	.vsync_level	= OMAPDSS_SIG_ACTIVE_LOW,
 	.hsync_level	= OMAPDSS_SIG_ACTIVE_LOW,
 	.data_pclk_edge	= OMAPDSS_DRIVE_SIG_RISING_EDGE,
 	.de_level	= OMAPDSS_SIG_ACTIVE_HIGH,
 	.sync_pclk_edge	= OMAPDSS_DRIVE_SIG_RISING_EDGE,
 };

 static int nec_8048_bl_update_status(struct backlight_device *bl)
 {
 	struct omap_dss_device *dssdev = dev_get_drvdata(&bl->dev);
 	int level;

 	if (!dssdev->set_backlight)
 		return -EINVAL;

 	if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
 			bl->props.power == FB_BLANK_UNBLANK)
 		level = bl->props.brightness;
 	else
 		level = 0;

 	return dssdev->set_backlight(dssdev, level);
 }

 static int nec_8048_bl_get_brightness(struct backlight_device *bl)
 {
 	if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
 			bl->props.power == FB_BLANK_UNBLANK)
 		return bl->props.brightness;

 	return 0;
 }

 static const struct backlight_ops nec_8048_bl_ops = {
 	.get_brightness	= nec_8048_bl_get_brightness,
 	.update_status	= nec_8048_bl_update_status,
 };

 static int nec_8048_panel_probe(struct omap_dss_device *dssdev)
 {
 	struct backlight_device *bl;
 	struct nec_8048_data *necd;
 	struct backlight_properties props;
 	int r;

 	dssdev->panel.timings = nec_8048_panel_timings;

 	necd = kzalloc(sizeof(*necd), GFP_KERNEL);
 	if (!necd)
 		return -ENOMEM;

 	dev_set_drvdata(&dssdev->dev, necd);

 	memset(&props, 0, sizeof(struct backlight_properties));
 	props.max_brightness = 255;

 	bl = backlight_device_register("nec-8048", &dssdev->dev, dssdev,
 			&nec_8048_bl_ops, &props);
 	if (IS_ERR(bl)) {
 		r = PTR_ERR(bl);
 		kfree(necd);
 		return r;
 	}
 	necd->bl = bl;

 	bl->props.fb_blank = FB_BLANK_UNBLANK;
 	bl->props.power = FB_BLANK_UNBLANK;
 	bl->props.max_brightness = dssdev->max_backlight_level;
 	bl->props.brightness = dssdev->max_backlight_level;

 	r = nec_8048_bl_update_status(bl);
 	if (r < 0)
 		dev_err(&dssdev->dev, "failed to set lcd brightness\n");

 	return 0;
 }

 static void nec_8048_panel_remove(struct omap_dss_device *dssdev)
 {
 	struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev);
 	struct backlight_device *bl = necd->bl;

 	bl->props.power = FB_BLANK_POWERDOWN;
 	nec_8048_bl_update_status(bl);
 	backlight_device_unregister(bl);

 	kfree(necd);
 }

 static int nec_8048_panel_power_on(struct omap_dss_device *dssdev)
 {
 	int r;
 	struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev);
 	struct backlight_device *bl = necd->bl;

 	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
 		return 0;

 	r = omapdss_dpi_display_enable(dssdev);
 	if (r)
 		goto err0;

 	if (dssdev->platform_enable) {
 		r = dssdev->platform_enable(dssdev);
 		if (r)
 			goto err1;
 	}

 	r = nec_8048_bl_update_status(bl);
 	if (r < 0)
 		dev_err(&dssdev->dev, "failed to set lcd brightness\n");

 	return 0;
 err1:
 	omapdss_dpi_display_disable(dssdev);
 err0:
 	return r;
 }

 static void nec_8048_panel_power_off(struct omap_dss_device *dssdev)
 {
 	struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev);
 	struct backlight_device *bl = necd->bl;

 	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
 		return;

 	bl->props.brightness = 0;
 	nec_8048_bl_update_status(bl);

 	if (dssdev->platform_disable)
 		dssdev->platform_disable(dssdev);

 	omapdss_dpi_display_disable(dssdev);
 }

 static int nec_8048_panel_enable(struct omap_dss_device *dssdev)
 {
 	int r;

 	r = nec_8048_panel_power_on(dssdev);
 	if (r)
 		return r;

 	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

 	return 0;
 }

 static void nec_8048_panel_disable(struct omap_dss_device *dssdev)
 {
 	nec_8048_panel_power_off(dssdev);

 	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 }

 static int nec_8048_panel_suspend(struct omap_dss_device *dssdev)
 {
 	nec_8048_panel_power_off(dssdev);

 	dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;

 	return 0;
 }

 static int nec_8048_panel_resume(struct omap_dss_device *dssdev)
 {
 	int r;

 	r = nec_8048_panel_power_on(dssdev);
 	if (r)
 		return r;

 	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

 	return 0;
 }

 static int nec_8048_recommended_bpp(struct omap_dss_device *dssdev)
 {
 	return 16;
 }

 static struct omap_dss_driver nec_8048_driver = {
 	.probe			= nec_8048_panel_probe,
 	.remove			= nec_8048_panel_remove,
 	.enable			= nec_8048_panel_enable,
 	.disable		= nec_8048_panel_disable,
 	.suspend		= nec_8048_panel_suspend,
 	.resume			= nec_8048_panel_resume,
 	.get_recommended_bpp	= nec_8048_recommended_bpp,

 	.driver		= {
 		.name		= "NEC_8048_panel",
 		.owner		= THIS_MODULE,
 	},
 };

 static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
 			unsigned char reg_data)
 {
 	int ret = 0;
 	unsigned int cmd = 0, data = 0;

 	cmd = 0x0000 | reg_addr; /* register address write */
 	data = 0x0100 | reg_data ; /* register data write */
 	data = (cmd << 16) | data;

 	ret = spi_write(spi, (unsigned char *)&data, 4);
 	if (ret)
 		pr_err("error in spi_write %x\n", data);

 	return ret;
 }

 static int init_nec_8048_wvga_lcd(struct spi_device *spi)
 {
 	unsigned int i;
 	/* Initialization Sequence */
 	/* nec_8048_spi_send(spi, REG, VAL) */
 	for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
 		nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
 				nec_8048_init_seq[i].dat);
 	udelay(20);
 	nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
 				nec_8048_init_seq[i].dat);
 	return 0;
 }

 static int nec_8048_spi_probe(struct spi_device *spi)
 {
 	spi->mode = SPI_MODE_0;
 	spi->bits_per_word = 32;
 	spi_setup(spi);

 	init_nec_8048_wvga_lcd(spi);

 	return omap_dss_register_driver(&nec_8048_driver);
 }

 static int nec_8048_spi_remove(struct spi_device *spi)
 {
 	omap_dss_unregister_driver(&nec_8048_driver);

 	return 0;
 }

 static int nec_8048_spi_suspend(struct spi_device *spi, pm_message_t mesg)
 {
 	nec_8048_spi_send(spi, 2, 0x01);
 	mdelay(40);

 	return 0;
 }

 static int nec_8048_spi_resume(struct spi_device *spi)
 {
 	/* reinitialize the panel */
 	spi_setup(spi);
 	nec_8048_spi_send(spi, 2, 0x00);
 	init_nec_8048_wvga_lcd(spi);

 	return 0;
 }

 static struct spi_driver nec_8048_spi_driver = {
 	.probe		= nec_8048_spi_probe,
 	.remove		= __devexit_p(nec_8048_spi_remove),
 	.suspend	= nec_8048_spi_suspend,
 	.resume		= nec_8048_spi_resume,
 	.driver		= {
 		.name	= "nec_8048_spi",
 		.owner	= THIS_MODULE,
 	},
 };

 module_spi_driver(nec_8048_spi_driver);

 MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
 MODULE_DESCRIPTION("NEC-nl8048hl11-01b Driver");
 MODULE_LICENSE("GPL");
	/*
	* Support for NEC-nl8048hl11-01b panel driver
	*
	* Copyright (C) 2010 Texas Instruments Inc.
	* Author: Erik Gilling <konkers@android.com>
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 as published by
	* the Free Software Foundation.
	*
	* 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, see <http://www.gnu.org/licenses/>.
	*/

	#include <linux/module.h>
	#include <linux/delay.h>
	#include <linux/spi/spi.h>
	#include <linux/backlight.h>
	#include <linux/fb.h>

	#include <video/omapdss.h>

	#define LCD_XRES 800
	#define LCD_YRES 480
	/*
	* NEC PIX Clock Ratings
	* MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
	*/
	#define LCD_PIXEL_CLOCK 23800

	struct nec_8048_data {
	struct backlight_device *bl;
	};

	static const struct {
	unsigned char addr;
	unsigned char dat;
	} nec_8048_init_seq[] = {
	{ 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
	{ 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
	{ 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
	{ 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
	{ 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
	{ 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
	{ 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
	{ 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
	{ 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
	{ 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
	{ 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
	{ 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
	{ 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
	{ 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
	{ 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
	{ 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
	{ 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
	{ 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
	};

	/*
	* NEC NL8048HL11-01B Manual
	* defines HFB, HSW, HBP, VFP, VSW, VBP as shown below
	*/

	static struct omap_video_timings nec_8048_panel_timings = {
	/* 800 x 480 @ 60 Hz Reduced blanking VESA CVT 0.31M3-R */
	.x_res = LCD_XRES,
	.y_res = LCD_YRES,
	.pixel_clock = LCD_PIXEL_CLOCK,
	.hfp = 6,
	.hsw = 1,
	.hbp = 4,
	.vfp = 3,
	.vsw = 1,
	.vbp = 4,

	.vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
	.hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
	.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
	.de_level = OMAPDSS_SIG_ACTIVE_HIGH,
	.sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
	};

	static int nec_8048_bl_update_status(struct backlight_device *bl)
	{
	struct omap_dss_device *dssdev = dev_get_drvdata(&bl->dev);
	int level;

	if (!dssdev->set_backlight)
	return -EINVAL;

	if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
	bl->props.power == FB_BLANK_UNBLANK)
	level = bl->props.brightness;
	else
	level = 0;

	return dssdev->set_backlight(dssdev, level);
	}

	static int nec_8048_bl_get_brightness(struct backlight_device *bl)
	{
	if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
	bl->props.power == FB_BLANK_UNBLANK)
	return bl->props.brightness;

	return 0;
	}

	static const struct backlight_ops nec_8048_bl_ops = {
	.get_brightness = nec_8048_bl_get_brightness,
	.update_status = nec_8048_bl_update_status,
	};

	static int nec_8048_panel_probe(struct omap_dss_device *dssdev)
	{
	struct backlight_device *bl;
	struct nec_8048_data *necd;
	struct backlight_properties props;
	int r;

	dssdev->panel.timings = nec_8048_panel_timings;

	necd = kzalloc(sizeof(*necd), GFP_KERNEL);
	if (!necd)
	return -ENOMEM;

	dev_set_drvdata(&dssdev->dev, necd);

	memset(&props, 0, sizeof(struct backlight_properties));
	props.max_brightness = 255;

	bl = backlight_device_register("nec-8048", &dssdev->dev, dssdev,
	&nec_8048_bl_ops, &props);
	if (IS_ERR(bl)) {
	r = PTR_ERR(bl);
	kfree(necd);
	return r;
	}
	necd->bl = bl;

	bl->props.fb_blank = FB_BLANK_UNBLANK;
	bl->props.power = FB_BLANK_UNBLANK;
	bl->props.max_brightness = dssdev->max_backlight_level;
	bl->props.brightness = dssdev->max_backlight_level;

	r = nec_8048_bl_update_status(bl);
	if (r < 0)
	dev_err(&dssdev->dev, "failed to set lcd brightness\n");

	return 0;
	}

	static void nec_8048_panel_remove(struct omap_dss_device *dssdev)
	{
	struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev);
	struct backlight_device *bl = necd->bl;

	bl->props.power = FB_BLANK_POWERDOWN;
	nec_8048_bl_update_status(bl);
	backlight_device_unregister(bl);

	kfree(necd);
	}

	static int nec_8048_panel_power_on(struct omap_dss_device *dssdev)
	{
	int r;
	struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev);
	struct backlight_device *bl = necd->bl;

	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
	return 0;

	r = omapdss_dpi_display_enable(dssdev);
	if (r)
	goto err0;

	if (dssdev->platform_enable) {
	r = dssdev->platform_enable(dssdev);
	if (r)
	goto err1;
	}

	r = nec_8048_bl_update_status(bl);
	if (r < 0)
	dev_err(&dssdev->dev, "failed to set lcd brightness\n");

	return 0;
	err1:
	omapdss_dpi_display_disable(dssdev);
	err0:
	return r;
	}

	static void nec_8048_panel_power_off(struct omap_dss_device *dssdev)
	{
	struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev);
	struct backlight_device *bl = necd->bl;

	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
	return;

	bl->props.brightness = 0;
	nec_8048_bl_update_status(bl);

	if (dssdev->platform_disable)
	dssdev->platform_disable(dssdev);

	omapdss_dpi_display_disable(dssdev);
	}

	static int nec_8048_panel_enable(struct omap_dss_device *dssdev)
	{
	int r;

	r = nec_8048_panel_power_on(dssdev);
	if (r)
	return r;

	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

	return 0;
	}

	static void nec_8048_panel_disable(struct omap_dss_device *dssdev)
	{
	nec_8048_panel_power_off(dssdev);

	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
	}

	static int nec_8048_panel_suspend(struct omap_dss_device *dssdev)
	{
	nec_8048_panel_power_off(dssdev);

	dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;

	return 0;
	}

	static int nec_8048_panel_resume(struct omap_dss_device *dssdev)
	{
	int r;

	r = nec_8048_panel_power_on(dssdev);
	if (r)
	return r;

	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

	return 0;
	}

	static int nec_8048_recommended_bpp(struct omap_dss_device *dssdev)
	{
	return 16;
	}

	static struct omap_dss_driver nec_8048_driver = {
	.probe = nec_8048_panel_probe,
	.remove = nec_8048_panel_remove,
	.enable = nec_8048_panel_enable,
	.disable = nec_8048_panel_disable,
	.suspend = nec_8048_panel_suspend,
	.resume = nec_8048_panel_resume,
	.get_recommended_bpp = nec_8048_recommended_bpp,

	.driver = {
	.name = "NEC_8048_panel",
	.owner = THIS_MODULE,
	},
	};

	static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
	unsigned char reg_data)
	{
	int ret = 0;
	unsigned int cmd = 0, data = 0;

	cmd = 0x0000 \| reg_addr; /* register address write */
	data = 0x0100 \| reg_data ; /* register data write */
	data = (cmd << 16) \| data;

	ret = spi_write(spi, (unsigned char *)&data, 4);
	if (ret)
	pr_err("error in spi_write %x\n", data);

	return ret;
	}

	static int init_nec_8048_wvga_lcd(struct spi_device *spi)
	{
	unsigned int i;
	/* Initialization Sequence */
	/* nec_8048_spi_send(spi, REG, VAL) */
	for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
	nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
	nec_8048_init_seq[i].dat);
	udelay(20);
	nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
	nec_8048_init_seq[i].dat);
	return 0;
	}

	static int nec_8048_spi_probe(struct spi_device *spi)
	{
	spi->mode = SPI_MODE_0;
	spi->bits_per_word = 32;
	spi_setup(spi);

	init_nec_8048_wvga_lcd(spi);

	return omap_dss_register_driver(&nec_8048_driver);
	}

	static int nec_8048_spi_remove(struct spi_device *spi)
	{
	omap_dss_unregister_driver(&nec_8048_driver);

	return 0;
	}

	static int nec_8048_spi_suspend(struct spi_device *spi, pm_message_t mesg)
	{
	nec_8048_spi_send(spi, 2, 0x01);
	mdelay(40);

	return 0;
	}

	static int nec_8048_spi_resume(struct spi_device *spi)
	{
	/* reinitialize the panel */
	spi_setup(spi);
	nec_8048_spi_send(spi, 2, 0x00);
	init_nec_8048_wvga_lcd(spi);

	return 0;
	}

	static struct spi_driver nec_8048_spi_driver = {
	.probe = nec_8048_spi_probe,
	.remove = __devexit_p(nec_8048_spi_remove),
	.suspend = nec_8048_spi_suspend,
	.resume = nec_8048_spi_resume,
	.driver = {
	.name = "nec_8048_spi",
	.owner = THIS_MODULE,
	},
	};

	module_spi_driver(nec_8048_spi_driver);

	MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
	MODULE_DESCRIPTION("NEC-nl8048hl11-01b Driver");
	MODULE_LICENSE("GPL");