Re: [PATCH] s3c-fb: Add support ld9040 amoled panel driver

Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> · Thu, 09 Sep 2010 15:46:06 +0900

Hello,

On 2010-09-09 11:16, Donghwa Lee wrote:

This patch supports ld9040 amoled panel driver.
It is similar to s6e63m0 panel driver and use spi gpio
to send panel information.

You should remove the "s3c-fb" prefix from the patch subject, as the 
s3c-fb driver has nothing to LD9040 driver. Please use something generic 
like 'drivers: lcd:' or so.

Signed-off-by: Donghwa Lee<dh09.lee@xxxxxxxxxxx>
Signed-off-by: Inki Dae<inki.dae@xxxxxxxxxxx>
---
  drivers/video/backlight/Kconfig  |    7 +
  drivers/video/backlight/Makefile |    1 +
  drivers/video/backlight/ld9040.c |  687 ++++++++++++++++++++++++++++++++++++++
  3 files changed, 695 insertions(+), 0 deletions(-)
  create mode 100644 drivers/video/backlight/ld9040.c

diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index e54a337..b8381d0 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -109,6 +109,13 @@ config LCD_S6E63M0
  	  If you have an S6E63M0 LCD Panel, say Y to enable its
  	  LCD control driver.

+config LCD_LD9040
+	bool "LD9040 AMOLED LCD Driver"
+	depends on SPI&&  BACKLIGHT_CLASS_DEVICE
+	help
+	  If you have an LD9040 LCD Panel, say Y to enable its
+	  LCD control driver.
+
  endif # LCD_CLASS_DEVICE

  #
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index 44c0f81..a52248e 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_LCD_VGG2432A4)	   += vgg2432a4.o
  obj-$(CONFIG_LCD_TDO24M)	   += tdo24m.o
  obj-$(CONFIG_LCD_TOSA)		   += tosa_lcd.o
  obj-$(CONFIG_LCD_S6E63M0)	+= s6e63m0.o
+obj-$(CONFIG_LCD_S6E63M0)	+= ld9040.o

You should use the newly defined LCD_LD9040 option in Makefile instead 
of hijacking the CONFIG_LCD_S6E63M0.


  obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o
  obj-$(CONFIG_BACKLIGHT_ATMEL_PWM)    += atmel-pwm-bl.o
diff --git a/drivers/video/backlight/ld9040.c b/drivers/video/backlight/ld9040.c
new file mode 100644
index 0000000..7a2109f
--- /dev/null
+++ b/drivers/video/backlight/ld9040.c
@@ -0,0 +1,687 @@
+/*
+ * ld9040 AMOLED LCD panel driver.
+ *
+ * Author: Donghwa Lee<dh09.lee@xxxxxxxxxxx>
+ *
+ * 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/wait.h>
+#include<linux/fb.h>
+#include<linux/delay.h>
+#include<linux/gpio.h>
+#include<linux/spi/spi.h>
+#include<linux/irq.h>
+#include<linux/interrupt.h>
+#include<linux/kernel.h>
+#include<linux/lcd.h>
+#include<linux/backlight.h>
+
+#define SLEEPMSEC		0x1000
+#define ENDDEF			0x2000
+#define	DEFMASK			0xFF00
+#define COMMAND_ONLY		0xFE
+#define DATA_ONLY		0xFF
+
+#define POWER_IS_ON(pwr)	((pwr)<= FB_BLANK_NORMAL)
+
+struct ld9040 {
+	struct device			*dev;
+	struct spi_device		*spi;
+	unsigned int			power;
+	struct lcd_device		*ld;
+	struct lcd_platform_data	*lcd_pd;
+};
+
+static const unsigned short SEQ_SWRESET[] = {
+	0x01, COMMAND_ONLY,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_USER_SETTING[] = {
+	0xF0, 0x5A,
+
+	DATA_ONLY, 0x5A,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_ELVSS[] = {
+	0xB1, 0x0B,
+
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x16,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_GTCON[] = {
+	0xF7, 0x09,
+
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_GAMMA_SET1[] = {
+	0xF9, 0x18,
+
+	DATA_ONLY, 0x9A,
+	DATA_ONLY, 0xB0,
+	DATA_ONLY, 0xAB,
+	DATA_ONLY, 0xC4,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0xAA,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0xA1,
+	DATA_ONLY, 0xB5,
+	DATA_ONLY, 0xB0,
+	DATA_ONLY, 0xC7,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0xC5,
+	DATA_ONLY, 0x24,
+	DATA_ONLY, 0xA7,
+	DATA_ONLY, 0xAC,
+	DATA_ONLY, 0x9A,
+	DATA_ONLY, 0xB6,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0xE5,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_GAMMA_CTRL[] = {
+	0xFB, 0x00,
+
+	DATA_ONLY, 0x5A,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_APON[] = {
+	0xF3, 0x00,
+
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x0A,
+	DATA_ONLY, 0x02,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_DISPCTL[] = {
+	0xF2, 0x02,
+
+	DATA_ONLY, 0x03,
+	DATA_ONLY, 0x1C,
+	DATA_ONLY, 0x10,
+	DATA_ONLY, 0x10,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_SLPOUT[] = {
+	0x11, COMMAND_ONLY,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_SLPIN[] = {
+	0x10, COMMAND_ONLY,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_DISPON[] = {
+	0x29, COMMAND_ONLY,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_DISPOFF[] = {
+	0x28, COMMAND_ONLY,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_VCI1_1ST_EN[] = {
+	0xF3, 0x10,
+
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x02,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_VL1_EN[] = {
+	0xF3, 0x11,
+
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x02,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_VL2_EN[] = {
+	0xF3, 0x13,
+
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x02,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_VCI1_2ND_EN[] = {
+	0xF3, 0x33,
+
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x02,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_VL3_EN[] = {
+	0xF3, 0x37,
+
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x02,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_VREG1_AMP_EN[] = {
+	0xF3, 0x37,
+
+	DATA_ONLY, 0x01,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x02,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_VGH_AMP_EN[] = {
+	0xF3, 0x37,
+
+	DATA_ONLY, 0x11,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x02,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_VGL_AMP_EN[] = {
+	0xF3, 0x37,
+
+	DATA_ONLY, 0x31,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x02,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_VMOS_AMP_EN[] = {
+	0xF3, 0x37,
+
+	DATA_ONLY, 0xB1,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x03,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_VINT_AMP_EN[] = {
+	0xF3, 0x37,
+
+	DATA_ONLY, 0xF1,
+	/* DATA_ONLY, 0x71,	VMOS/VBL/VBH not used */
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x03,
+	/* DATA_ONLY, 0x02,	VMOS/VBL/VBH not used */
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_VBH_AMP_EN[] = {
+	0xF3, 0x37,
+
+	DATA_ONLY, 0xF9,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x03,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_VBL_AMP_EN[] = {
+	0xF3, 0x37,
+
+	DATA_ONLY, 0xFD,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x03,
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_GAM_AMP_EN[] = {
+	0xF3, 0x37,
+
+	DATA_ONLY, 0xFF,
+	/* DATA_ONLY, 0x73,	VMOS/VBL/VBH not used */
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x03,
+	/* DATA_ONLY, 0x02,	VMOS/VBL/VBH not used */
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_SD_AMP_EN[] = {
+	0xF3, 0x37,
+
+	DATA_ONLY, 0xFF,
+	/* DATA_ONLY, 0x73,	VMOS/VBL/VBH not used */
+	DATA_ONLY, 0x80,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x03,
+	/* DATA_ONLY, 0x02,	VMOS/VBL/VBH not used */
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_GLS_EN[] = {
+	0xF3, 0x37,
+
+	DATA_ONLY, 0xFF,
+	/* DATA_ONLY, 0x73,	VMOS/VBL/VBH not used */
+	DATA_ONLY, 0x81,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x03,
+	/* DATA_ONLY, 0x02,	VMOS/VBL/VBH not used */
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_ELS_EN[] = {
+	0xF3, 0x37,
+
+	DATA_ONLY, 0xFF,
+	/* DATA_ONLY, 0x73,	VMOS/VBL/VBH not used */
+	DATA_ONLY, 0x83,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x03,
+	/* DATA_ONLY, 0x02,	VMOS/VBL/VBH not used */
+	ENDDEF, 0x00
+};
+
+static const unsigned short SEQ_EL_ON[] = {
+	0xF3, 0x37,
+
+	DATA_ONLY, 0xFF,
+	/* DATA_ONLY, 0x73,	VMOS/VBL/VBH not used */
+	DATA_ONLY, 0x87,
+	DATA_ONLY, 0x00,
+	DATA_ONLY, 0x03,
+	/* DATA_ONLY, 0x02,	VMOS/VBL/VBH not used */
+	ENDDEF, 0x00
+};
+
+static int ld9040_spi_write_byte(struct ld9040 *lcd, int addr, int data)
+{
+	u16 buf[1];
+	struct spi_message msg;
+
+	struct spi_transfer xfer = {
+		.len		= 2,
+		.tx_buf		= buf,
+	};
+
+	buf[0] = (addr<<  8) | data;
+
+	spi_message_init(&msg);
+	spi_message_add_tail(&xfer,&msg);
+
+	return spi_sync(lcd->spi,&msg);
+}
+
+static int ld9040_spi_write(struct ld9040 *lcd, unsigned char address,
+	unsigned char command)
+{
+	int ret = 0;
+
+	if (address != DATA_ONLY)
+		ret = ld9040_spi_write_byte(lcd, 0x0, address);
+	if (command != COMMAND_ONLY)
+		ret = ld9040_spi_write_byte(lcd, 0x1, command);
+
+	return ret;
+}
+
+static int ld9040_panel_send_sequence(struct ld9040 *lcd,
+	const unsigned short *wbuf)
+{
+	int ret = 0, i = 0;
+
+	while ((wbuf[i]&  DEFMASK) != ENDDEF) {
+		if ((wbuf[i]&  DEFMASK) != SLEEPMSEC) {
+			ret = ld9040_spi_write(lcd, wbuf[i], wbuf[i+1]);
+			if (ret)
+				break;
+		} else
+			udelay(wbuf[i+1]*1000);
+		i += 2;
+	}
+
+	return ret;
+}
+
+static int ld9040_ldi_init(struct ld9040 *lcd)
+{
+	int ret, i;
+	const unsigned short *init_seq[] = {
+		SEQ_USER_SETTING,
+		SEQ_ELVSS,
+		SEQ_GTCON,
+		SEQ_GAMMA_SET1,
+		SEQ_GAMMA_CTRL,
+		SEQ_SLPOUT,
+	};
+
+	for (i = 0; i<  ARRAY_SIZE(init_seq); i++) {
+		ret = ld9040_panel_send_sequence(lcd, init_seq[i]);
+		mdelay(5);
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+
+static int ld9040_ldi_enable(struct ld9040 *lcd)
+{
+	int ret = 0;
+
+	ret = ld9040_panel_send_sequence(lcd, SEQ_DISPON);
+
+	return ret;
+}
+
+static int ld9040_ldi_disable(struct ld9040 *lcd)
+{
+	int ret;
+
+	ret = ld9040_panel_send_sequence(lcd, SEQ_DISPOFF);
+
+	return ret;
+}
+
+static int ld9040_power_on(struct ld9040 *lcd)
+{
+	int ret = 0;
+	struct lcd_platform_data *pd = NULL;
+	pd = lcd->lcd_pd;
+	if (!pd) {
+		dev_err(lcd->dev, "platform data is NULL.\n");
+		return -EFAULT;
+	}
+
+	if (!pd->power_on) {
+		dev_err(lcd->dev, "power_on is NULL.\n");
+		return -EFAULT;
+	} else {
+		pd->power_on(lcd->ld, 1);
+		mdelay(pd->power_on_delay);
+	}
+
+	if (!pd->reset) {
+		dev_err(lcd->dev, "reset is NULL.\n");
+		return -EFAULT;
+	} else {
+		pd->reset(lcd->ld);
+		mdelay(pd->reset_delay);
+	}
+
+	ret = ld9040_ldi_init(lcd);
+	if (ret) {
+		dev_err(lcd->dev, "failed to initialize ldi.\n");
+		return ret;
+	}
+
+	ret = ld9040_ldi_enable(lcd);
+	if (ret) {
+		dev_err(lcd->dev, "failed to enable ldi.\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int ld9040_power_off(struct ld9040 *lcd)
+{
+	int ret = 0;
+	struct lcd_platform_data *pd = NULL;
+
+	pd = lcd->lcd_pd;
+	if (!pd) {
+		dev_err(lcd->dev, "platform data is NULL.\n");
+		return -EFAULT;
+	}
+
+	ret = ld9040_ldi_disable(lcd);
+	if (ret) {
+		dev_err(lcd->dev, "lcd setting failed.\n");
+		return -EIO;
+	}
+
+	mdelay(pd->power_off_delay);
+
+	if (!pd->power_on) {
+		dev_err(lcd->dev, "power_on is NULL.\n");
+		return -EFAULT;
+	} else
+		pd->power_on(lcd->ld, 0);
+
+	return 0;
+}
+
+static int ld9040_power(struct ld9040 *lcd, int power)
+{
+	int ret = 0;
+
+	if (POWER_IS_ON(power)&&  !POWER_IS_ON(lcd->power))
+		ret = ld9040_power_on(lcd);
+	else if (!POWER_IS_ON(power)&&  POWER_IS_ON(lcd->power))
+		ret = ld9040_power_off(lcd);
+
+	if (!ret)
+		lcd->power = power;
+
+	return ret;
+}
+
+static int ld9040_set_power(struct lcd_device *ld, int power)
+{
+	struct ld9040 *lcd = lcd_get_data(ld);
+
+	if (power != FB_BLANK_UNBLANK&&  power != FB_BLANK_POWERDOWN&&
+		power != FB_BLANK_NORMAL) {
+		dev_err(lcd->dev, "power value should be 0, 1 or 4.\n");
+		return -EINVAL;
+	}
+
+	return ld9040_power(lcd, power);
+}
+
+static int ld9040_get_power(struct lcd_device *ld)
+{
+	struct ld9040 *lcd = lcd_get_data(ld);
+
+	return lcd->power;
+}
+
+static struct lcd_ops ld9040_lcd_ops = {
+	.set_power = ld9040_set_power,
+	.get_power = ld9040_get_power,
+};
+
+
+static int __init ld9040_probe(struct spi_device *spi)
+{
+	int ret = 0;
+	struct ld9040 *lcd = NULL;
+	struct lcd_device *ld = NULL;
+
+	lcd = kzalloc(sizeof(struct ld9040), GFP_KERNEL);
+	if (!lcd)
+		return -ENOMEM;
+
+	/* ld9040 lcd panel uses 3-wire 9bits SPI Mode. */
+	spi->bits_per_word = 9;
+
+	ret = spi_setup(spi);
+	if (ret<  0) {
+		dev_err(&spi->dev, "spi setup failed.\n");
+		goto out_free_lcd;
+	}
+
+	lcd->spi = spi;
+	lcd->dev =&spi->dev;
+
+	lcd->lcd_pd = (struct lcd_platform_data *)spi->dev.platform_data;
+	if (!lcd->lcd_pd) {
+		dev_err(&spi->dev, "platform data is NULL.\n");
+		goto out_free_lcd;
+	}
+
+	ld = lcd_device_register("ld9040",&spi->dev, lcd,&ld9040_lcd_ops);

Please be a bit more consistent in the coding style. There should be a 
space after a comma. This applies to the above line and the few other.

+	if (IS_ERR(ld)) {
+		ret = PTR_ERR(ld);
+		goto out_free_lcd;
+	}
+
+	lcd->ld = ld;
+
+	/*
+	 * if lcd panel was on from bootloader like u-boot then
+	 * do not lcd on.
+	 */
+	if (!lcd->lcd_pd->lcd_enabled) {
+		/*
+		 * if lcd panel was off from bootloader then
+		 * current lcd status is powerdown and then
+		 * it enables lcd panel.
+		 */
+		lcd->power = FB_BLANK_POWERDOWN;
+
+		ld9040_power(lcd, FB_BLANK_UNBLANK);
+	} else
+		lcd->power = FB_BLANK_UNBLANK;
+
+	dev_set_drvdata(&spi->dev, lcd);
+
+	dev_info(&spi->dev, "ld9040 panel driver has been probed.\n");
+	return 0;
+
+out_free_lcd:
+	kfree(lcd);
+	return ret;
+}
+
+static int __devexit ld9040_remove(struct spi_device *spi)
+{
+	struct ld9040 *lcd = dev_get_drvdata(&spi->dev);
+
+	ld9040_power(lcd, FB_BLANK_POWERDOWN);
+	lcd_device_unregister(lcd->ld);
+	kfree(lcd);
+
+	return 0;
+}
+
+#if defined(CONFIG_PM)
+unsigned int beforepower;
+
+static int ld9040_suspend(struct spi_device *spi, pm_message_t mesg)
+{
+	int ret = 0;
+	struct ld9040 *lcd = dev_get_drvdata(&spi->dev);
+
+	dev_dbg(&spi->dev, "lcd->power = %d\n", lcd->power);
+
+	beforepower = lcd->power;
+
+	/*
+	 * when lcd panel is suspend, lcd panel becomes off
+	 * regardless of status.
+	 */
+	ret = ld9040_power(lcd, FB_BLANK_POWERDOWN);
+
+	return ret;
+}
+
+static int ld9040_resume(struct spi_device *spi)
+{
+	int ret = 0;
+	struct ld9040 *lcd = dev_get_drvdata(&spi->dev);
+
+	/*
+	 * after suspended, if lcd panel status is FB_BLANK_UNBLANK
+	 * (at that time, power is FB_BLANK_UNBLANK) then
+	 * it changes that status to FB_BLANK_POWERDOWN to get lcd on.
+	 */
+	if (beforepower == FB_BLANK_UNBLANK)
+		lcd->power = FB_BLANK_POWERDOWN;
+
+	dev_dbg(&spi->dev, "power = %d\n", beforepower);
+
+	ret = ld9040_power(lcd, beforepower);
+
+	return ret;
+}
+#else
+#define ld9040_suspend		NULL
+#define ld9040_resume		NULL
+#endif
+
+/* Power down all displays on reboot, poweroff or halt. */
+static void ld9040_shutdown(struct spi_device *spi)
+{
+	struct ld9040 *lcd = dev_get_drvdata(&spi->dev);
+
+	ld9040_power(lcd, FB_BLANK_POWERDOWN);
+}
+
+static struct spi_driver ld9040_driver = {
+	.driver = {
+		.name	= "ld9040",
+		.bus	=&spi_bus_type,
+		.owner	= THIS_MODULE,
+	},
+	.probe		= ld9040_probe,
+	.remove		= __devexit_p(ld9040_remove),
+	.shutdown	= ld9040_shutdown,
+	.suspend	= ld9040_suspend,
+	.resume		= ld9040_resume,
+};
+
+static int __init ld9040_init(void)
+{
+	return spi_register_driver(&ld9040_driver);
+}
+
+static void __exit ld9040_exit(void)
+{
+	spi_unregister_driver(&ld9040_driver);
+}
+
+module_init(ld9040_init);
+module_exit(ld9040_exit);
+
+MODULE_AUTHOR("Donghwa Lee<dh09.lee@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("ld9040 LCD Driver");
+MODULE_LICENSE("GPL");
+

Best regards
--
Marek Szyprowski
Samsung Poland R&D Center
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