[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / video / backlight / ltv350qv.c

/*
 * Power control for Samsung LTV350QV Quarter VGA LCD Panel
 *
 * Copyright (C) 2006, 2007 Atmel Corporation
 *
 * 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.
 */
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/lcd.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>

#include "ltv350qv.h"

#define POWER_IS_ON(pwr)	((pwr) <= FB_BLANK_NORMAL)

struct ltv350qv {
	struct spi_device	*spi;
	u8			*buffer;
	int			power;
	struct lcd_device	*ld;
};

/*
 * The power-on and power-off sequences are taken from the
 * LTV350QV-F04 data sheet from Samsung. The register definitions are
 * taken from the S6F2002 command list also from Samsung. Both
 * documents are distributed with the AVR32 Linux BSP CD from Atmel.
 *
 * There's still some voodoo going on here, but it's a lot better than
 * in the first incarnation of the driver where all we had was the raw
 * numbers from the initialization sequence.
 */
static int ltv350qv_write_reg(struct ltv350qv *lcd, u8 reg, u16 val)
{
	struct spi_message msg;
	struct spi_transfer index_xfer = {
		.len		= 3,
		.cs_change	= 1,
	};
	struct spi_transfer value_xfer = {
		.len		= 3,
	};

	spi_message_init(&msg);

	/* register index */
	lcd->buffer[0] = LTV_OPC_INDEX;
	lcd->buffer[1] = 0x00;
	lcd->buffer[2] = reg & 0x7f;
	index_xfer.tx_buf = lcd->buffer;
	spi_message_add_tail(&index_xfer, &msg);

	/* register value */
	lcd->buffer[4] = LTV_OPC_DATA;
	lcd->buffer[5] = val >> 8;
	lcd->buffer[6] = val;
	value_xfer.tx_buf = lcd->buffer + 4;
	spi_message_add_tail(&value_xfer, &msg);

	return spi_sync(lcd->spi, &msg);
}

/* The comments are taken straight from the data sheet */
static int ltv350qv_power_on(struct ltv350qv *lcd)
{
	int ret;

	/* Power On Reset Display off State */
	if (ltv350qv_write_reg(lcd, LTV_PWRCTL1, 0x0000))
		goto err;
	usleep_range(15000, 16000);

	/* Power Setting Function 1 */
	if (ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE))
		goto err;
	if (ltv350qv_write_reg(lcd, LTV_PWRCTL2, LTV_VCOML_ENABLE))
		goto err_power1;

	/* Power Setting Function 2 */
	if (ltv350qv_write_reg(lcd, LTV_PWRCTL1,
			       LTV_VCOM_DISABLE | LTV_DRIVE_CURRENT(5)
			       | LTV_SUPPLY_CURRENT(5)))
		goto err_power2;

	msleep(55);

	/* Instruction Setting */
	ret = ltv350qv_write_reg(lcd, LTV_IFCTL,
				 LTV_NMD | LTV_REV | LTV_NL(0x1d));
	ret |= ltv350qv_write_reg(lcd, LTV_DATACTL,
				  LTV_DS_SAME | LTV_CHS_480
				  | LTV_DF_RGB | LTV_RGB_BGR);
	ret |= ltv350qv_write_reg(lcd, LTV_ENTRY_MODE,
				  LTV_VSPL_ACTIVE_LOW
				  | LTV_HSPL_ACTIVE_LOW
				  | LTV_DPL_SAMPLE_RISING
				  | LTV_EPL_ACTIVE_LOW
				  | LTV_SS_RIGHT_TO_LEFT);
	ret |= ltv350qv_write_reg(lcd, LTV_GATECTL1, LTV_CLW(3));
	ret |= ltv350qv_write_reg(lcd, LTV_GATECTL2,
				  LTV_NW_INV_1LINE | LTV_FWI(3));
	ret |= ltv350qv_write_reg(lcd, LTV_VBP, 0x000a);
	ret |= ltv350qv_write_reg(lcd, LTV_HBP, 0x0021);
	ret |= ltv350qv_write_reg(lcd, LTV_SOTCTL, LTV_SDT(3) | LTV_EQ(0));
	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(0), 0x0103);
	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(1), 0x0301);
	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(2), 0x1f0f);
	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(3), 0x1f0f);
	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(4), 0x0707);
	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(5), 0x0307);
	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(6), 0x0707);
	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(7), 0x0000);
	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(8), 0x0004);
	ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(9), 0x0000);
	if (ret)
		goto err_settings;

	/* Wait more than 2 frames */
	msleep(20);

	/* Display On Sequence */
	ret = ltv350qv_write_reg(lcd, LTV_PWRCTL1,
				 LTV_VCOM_DISABLE | LTV_VCOMOUT_ENABLE
				 | LTV_POWER_ON | LTV_DRIVE_CURRENT(5)
				 | LTV_SUPPLY_CURRENT(5));
	ret |= ltv350qv_write_reg(lcd, LTV_GATECTL2,
				  LTV_NW_INV_1LINE | LTV_DSC | LTV_FWI(3));
	if (ret)
		goto err_disp_on;

	/* Display should now be ON. Phew. */
	return 0;

err_disp_on:
	/*
	 * Try to recover. Error handling probably isn't very useful
	 * at this point, just make a best effort to switch the panel
	 * off.
	 */
	ltv350qv_write_reg(lcd, LTV_PWRCTL1,
			   LTV_VCOM_DISABLE | LTV_DRIVE_CURRENT(5)
			   | LTV_SUPPLY_CURRENT(5));
	ltv350qv_write_reg(lcd, LTV_GATECTL2,
			   LTV_NW_INV_1LINE | LTV_FWI(3));
err_settings:
err_power2:
err_power1:
	ltv350qv_write_reg(lcd, LTV_PWRCTL2, 0x0000);
	usleep_range(1000, 1100);
err:
	ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE);
	return -EIO;
}

static int ltv350qv_power_off(struct ltv350qv *lcd)
{
	int ret;

	/* Display Off Sequence */
	ret = ltv350qv_write_reg(lcd, LTV_PWRCTL1,
				 LTV_VCOM_DISABLE
				 | LTV_DRIVE_CURRENT(5)
				 | LTV_SUPPLY_CURRENT(5));
	ret |= ltv350qv_write_reg(lcd, LTV_GATECTL2,
				  LTV_NW_INV_1LINE | LTV_FWI(3));

	/* Power down setting 1 */
	ret |= ltv350qv_write_reg(lcd, LTV_PWRCTL2, 0x0000);

	/* Wait at least 1 ms */
	usleep_range(1000, 1100);

	/* Power down setting 2 */
	ret |= ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE);

	/*
	 * No point in trying to recover here. If we can't switch the
	 * panel off, what are we supposed to do other than inform the
	 * user about the failure?
	 */
	if (ret)
		return -EIO;

	/* Display power should now be OFF */
	return 0;
}

static int ltv350qv_power(struct ltv350qv *lcd, int power)
{
	int ret = 0;

	if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))
		ret = ltv350qv_power_on(lcd);
	else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))
		ret = ltv350qv_power_off(lcd);

	if (!ret)
		lcd->power = power;

	return ret;
}

static int ltv350qv_set_power(struct lcd_device *ld, int power)
{
	struct ltv350qv *lcd = lcd_get_data(ld);

	return ltv350qv_power(lcd, power);
}

static int ltv350qv_get_power(struct lcd_device *ld)
{
	struct ltv350qv *lcd = lcd_get_data(ld);

	return lcd->power;
}

static struct lcd_ops ltv_ops = {
	.get_power	= ltv350qv_get_power,
	.set_power	= ltv350qv_set_power,
};

static int ltv350qv_probe(struct spi_device *spi)
{
	struct ltv350qv *lcd;
	struct lcd_device *ld;
	int ret;

	lcd = devm_kzalloc(&spi->dev, sizeof(struct ltv350qv), GFP_KERNEL);
	if (!lcd)
		return -ENOMEM;

	lcd->spi = spi;
	lcd->power = FB_BLANK_POWERDOWN;
	lcd->buffer = devm_kzalloc(&spi->dev, 8, GFP_KERNEL);
	if (!lcd->buffer)
		return -ENOMEM;

	ld = lcd_device_register("ltv350qv", &spi->dev, lcd, &ltv_ops);
	if (IS_ERR(ld))
		return PTR_ERR(ld);

	lcd->ld = ld;

	ret = ltv350qv_power(lcd, FB_BLANK_UNBLANK);
	if (ret)
		goto out_unregister;

	spi_set_drvdata(spi, lcd);

	return 0;

out_unregister:
	lcd_device_unregister(ld);
	return ret;
}

static int ltv350qv_remove(struct spi_device *spi)
{
	struct ltv350qv *lcd = spi_get_drvdata(spi);

	ltv350qv_power(lcd, FB_BLANK_POWERDOWN);
	lcd_device_unregister(lcd->ld);

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int ltv350qv_suspend(struct device *dev)
{
	struct ltv350qv *lcd = dev_get_drvdata(dev);

	return ltv350qv_power(lcd, FB_BLANK_POWERDOWN);
}

static int ltv350qv_resume(struct device *dev)
{
	struct ltv350qv *lcd = dev_get_drvdata(dev);

	return ltv350qv_power(lcd, FB_BLANK_UNBLANK);
}
#endif

static SIMPLE_DEV_PM_OPS(ltv350qv_pm_ops, ltv350qv_suspend, ltv350qv_resume);

/* Power down all displays on reboot, poweroff or halt */
static void ltv350qv_shutdown(struct spi_device *spi)
{
	struct ltv350qv *lcd = spi_get_drvdata(spi);

	ltv350qv_power(lcd, FB_BLANK_POWERDOWN);
}

static struct spi_driver ltv350qv_driver = {
	.driver = {
		.name		= "ltv350qv",
		.owner		= THIS_MODULE,
		.pm		= &ltv350qv_pm_ops,
	},

	.probe		= ltv350qv_probe,
	.remove		= ltv350qv_remove,
	.shutdown	= ltv350qv_shutdown,
};

module_spi_driver(ltv350qv_driver);

MODULE_AUTHOR("Haavard Skinnemoen (Atmel)");
MODULE_DESCRIPTION("Samsung LTV350QV LCD Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("spi:ltv350qv");
Commit	Line	Data
18f65c79 HS	1	/*
	2	* Power control for Samsung LTV350QV Quarter VGA LCD Panel
	3	*
	4	* Copyright (C) 2006, 2007 Atmel Corporation
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10	#include <linux/delay.h>
	11	#include <linux/err.h>
	12	#include <linux/fb.h>
	13	#include <linux/init.h>
	14	#include <linux/lcd.h>
	15	#include <linux/module.h>
5a0e3ad6	16	#include <linux/slab.h>
18f65c79 HS	17	#include <linux/spi/spi.h>
	18
	19	#include "ltv350qv.h"
	20
	21	#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)
	22
	23	struct ltv350qv {
	24	struct spi_device *spi;
	25	u8 *buffer;
	26	int power;
	27	struct lcd_device *ld;
	28	};
	29
	30	/*
	31	* The power-on and power-off sequences are taken from the
	32	* LTV350QV-F04 data sheet from Samsung. The register definitions are
	33	* taken from the S6F2002 command list also from Samsung. Both
	34	* documents are distributed with the AVR32 Linux BSP CD from Atmel.
	35	*
	36	* There's still some voodoo going on here, but it's a lot better than
	37	* in the first incarnation of the driver where all we had was the raw
	38	* numbers from the initialization sequence.
	39	*/
	40	static int ltv350qv_write_reg(struct ltv350qv *lcd, u8 reg, u16 val)
	41	{
	42	struct spi_message msg;
	43	struct spi_transfer index_xfer = {
	44	.len = 3,
	45	.cs_change = 1,
	46	};
	47	struct spi_transfer value_xfer = {
	48	.len = 3,
	49	};
	50
	51	spi_message_init(&msg);
	52
	53	/* register index */
	54	lcd->buffer[0] = LTV_OPC_INDEX;
	55	lcd->buffer[1] = 0x00;
	56	lcd->buffer[2] = reg & 0x7f;
	57	index_xfer.tx_buf = lcd->buffer;
	58	spi_message_add_tail(&index_xfer, &msg);
	59
	60	/* register value */
	61	lcd->buffer[4] = LTV_OPC_DATA;
	62	lcd->buffer[5] = val >> 8;
	63	lcd->buffer[6] = val;
	64	value_xfer.tx_buf = lcd->buffer + 4;
	65	spi_message_add_tail(&value_xfer, &msg);
	66
	67	return spi_sync(lcd->spi, &msg);
	68	}
	69
	70	/* The comments are taken straight from the data sheet */
	71	static int ltv350qv_power_on(struct ltv350qv *lcd)
	72	{
	73	int ret;
	74
	75	/* Power On Reset Display off State */
	76	if (ltv350qv_write_reg(lcd, LTV_PWRCTL1, 0x0000))
	77	goto err;
a08e1a37	78	usleep_range(15000, 16000);
18f65c79 HS	79
	80	/* Power Setting Function 1 */
	81	if (ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE))
	82	goto err;
	83	if (ltv350qv_write_reg(lcd, LTV_PWRCTL2, LTV_VCOML_ENABLE))
	84	goto err_power1;
	85
	86	/* Power Setting Function 2 */
	87	if (ltv350qv_write_reg(lcd, LTV_PWRCTL1,
	88	LTV_VCOM_DISABLE \| LTV_DRIVE_CURRENT(5)
	89	\| LTV_SUPPLY_CURRENT(5)))
	90	goto err_power2;
	91
	92	msleep(55);
	93
	94	/* Instruction Setting */
	95	ret = ltv350qv_write_reg(lcd, LTV_IFCTL,
	96	LTV_NMD \| LTV_REV \| LTV_NL(0x1d));
	97	ret \|= ltv350qv_write_reg(lcd, LTV_DATACTL,
	98	LTV_DS_SAME \| LTV_CHS_480
	99	\| LTV_DF_RGB \| LTV_RGB_BGR);
	100	ret \|= ltv350qv_write_reg(lcd, LTV_ENTRY_MODE,
	101	LTV_VSPL_ACTIVE_LOW
	102	\| LTV_HSPL_ACTIVE_LOW
	103	\| LTV_DPL_SAMPLE_RISING
	104	\| LTV_EPL_ACTIVE_LOW
	105	\| LTV_SS_RIGHT_TO_LEFT);
	106	ret \|= ltv350qv_write_reg(lcd, LTV_GATECTL1, LTV_CLW(3));
	107	ret \|= ltv350qv_write_reg(lcd, LTV_GATECTL2,
	108	LTV_NW_INV_1LINE \| LTV_FWI(3));
	109	ret \|= ltv350qv_write_reg(lcd, LTV_VBP, 0x000a);
	110	ret \|= ltv350qv_write_reg(lcd, LTV_HBP, 0x0021);
	111	ret \|= ltv350qv_write_reg(lcd, LTV_SOTCTL, LTV_SDT(3) \| LTV_EQ(0));
	112	ret \|= ltv350qv_write_reg(lcd, LTV_GAMMA(0), 0x0103);
	113	ret \|= ltv350qv_write_reg(lcd, LTV_GAMMA(1), 0x0301);
	114	ret \|= ltv350qv_write_reg(lcd, LTV_GAMMA(2), 0x1f0f);
	115	ret \|= ltv350qv_write_reg(lcd, LTV_GAMMA(3), 0x1f0f);
	116	ret \|= ltv350qv_write_reg(lcd, LTV_GAMMA(4), 0x0707);
	117	ret \|= ltv350qv_write_reg(lcd, LTV_GAMMA(5), 0x0307);
	118	ret \|= ltv350qv_write_reg(lcd, LTV_GAMMA(6), 0x0707);
	119	ret \|= ltv350qv_write_reg(lcd, LTV_GAMMA(7), 0x0000);
	120	ret \|= ltv350qv_write_reg(lcd, LTV_GAMMA(8), 0x0004);
	121	ret \|= ltv350qv_write_reg(lcd, LTV_GAMMA(9), 0x0000);
	122	if (ret)
	123	goto err_settings;
	124
	125	/* Wait more than 2 frames */
	126	msleep(20);
	127
	128	/* Display On Sequence */
	129	ret = ltv350qv_write_reg(lcd, LTV_PWRCTL1,
	130	LTV_VCOM_DISABLE \| LTV_VCOMOUT_ENABLE
	131	\| LTV_POWER_ON \| LTV_DRIVE_CURRENT(5)
	132	\| LTV_SUPPLY_CURRENT(5));
	133	ret \|= ltv350qv_write_reg(lcd, LTV_GATECTL2,
	134	LTV_NW_INV_1LINE \| LTV_DSC \| LTV_FWI(3));
	135	if (ret)
	136	goto err_disp_on;
	137
	138	/* Display should now be ON. Phew. */
	139	return 0;
	140
	141	err_disp_on:
	142	/*
143	* Try to recover. Error handling probably isn't very useful
144	* at this point, just make a best effort to switch the panel
145	* off.
146	*/
147	ltv350qv_write_reg(lcd, LTV_PWRCTL1,
148	LTV_VCOM_DISABLE \| LTV_DRIVE_CURRENT(5)
149	\| LTV_SUPPLY_CURRENT(5));
150	ltv350qv_write_reg(lcd, LTV_GATECTL2,
151	LTV_NW_INV_1LINE \| LTV_FWI(3));
152	err_settings:
153	err_power2:
154	err_power1:
155	ltv350qv_write_reg(lcd, LTV_PWRCTL2, 0x0000);
a08e1a37	156	usleep_range(1000, 1100);
18f65c79 HS	157	err:
	158	ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE);
	159	return -EIO;
	160	}
	161
	162	static int ltv350qv_power_off(struct ltv350qv *lcd)
	163	{
	164	int ret;
	165
	166	/* Display Off Sequence */
	167	ret = ltv350qv_write_reg(lcd, LTV_PWRCTL1,
	168	LTV_VCOM_DISABLE
	169	\| LTV_DRIVE_CURRENT(5)
	170	\| LTV_SUPPLY_CURRENT(5));
	171	ret \|= ltv350qv_write_reg(lcd, LTV_GATECTL2,
	172	LTV_NW_INV_1LINE \| LTV_FWI(3));
	173
	174	/* Power down setting 1 */
	175	ret \|= ltv350qv_write_reg(lcd, LTV_PWRCTL2, 0x0000);
	176
	177	/* Wait at least 1 ms */
a08e1a37	178	usleep_range(1000, 1100);
18f65c79 HS	179
	180	/* Power down setting 2 */
	181	ret \|= ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE);
	182
	183	/*
	184	* No point in trying to recover here. If we can't switch the
	185	* panel off, what are we supposed to do other than inform the
	186	* user about the failure?
	187	*/
	188	if (ret)
	189	return -EIO;
	190
	191	/* Display power should now be OFF */
	192	return 0;
	193	}
	194
	195	static int ltv350qv_power(struct ltv350qv *lcd, int power)
	196	{
	197	int ret = 0;
	198
	199	if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))
	200	ret = ltv350qv_power_on(lcd);
	201	else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))
	202	ret = ltv350qv_power_off(lcd);
	203
	204	if (!ret)
	205	lcd->power = power;
	206
	207	return ret;
	208	}
	209
	210	static int ltv350qv_set_power(struct lcd_device *ld, int power)
	211	{
	212	struct ltv350qv *lcd = lcd_get_data(ld);
	213
	214	return ltv350qv_power(lcd, power);
	215	}
	216
	217	static int ltv350qv_get_power(struct lcd_device *ld)
	218	{
	219	struct ltv350qv *lcd = lcd_get_data(ld);
	220
	221	return lcd->power;
	222	}
	223
	224	static struct lcd_ops ltv_ops = {
	225	.get_power = ltv350qv_get_power,
	226	.set_power = ltv350qv_set_power,
	227	};
	228
1b9e450d	229	static int ltv350qv_probe(struct spi_device *spi)
18f65c79 HS	230	{
	231	struct ltv350qv *lcd;
	232	struct lcd_device *ld;
	233	int ret;
	234
ab03e047	235	lcd = devm_kzalloc(&spi->dev, sizeof(struct ltv350qv), GFP_KERNEL);
18f65c79 HS	236	if (!lcd)
	237	return -ENOMEM;
	238
	239	lcd->spi = spi;
	240	lcd->power = FB_BLANK_POWERDOWN;
ab03e047 JH	241	lcd->buffer = devm_kzalloc(&spi->dev, 8, GFP_KERNEL);
	242	if (!lcd->buffer)
	243	return -ENOMEM;
18f65c79 HS	244
18f65c79 HS	245	ld = lcd_device_register("ltv350qv", &spi->dev, lcd, &ltv_ops);
ab03e047 JH	246	if (IS_ERR(ld))
	247	return PTR_ERR(ld);
	248
18f65c79 HS	249	lcd->ld = ld;
	250
	251	ret = ltv350qv_power(lcd, FB_BLANK_UNBLANK);
	252	if (ret)
	253	goto out_unregister;
	254
91c665b0	255	spi_set_drvdata(spi, lcd);
18f65c79 HS	256
	257	return 0;
	258
	259	out_unregister:
	260	lcd_device_unregister(ld);
18f65c79 HS	261	return ret;
	262	}
	263
7e4b9d0b	264	static int ltv350qv_remove(struct spi_device *spi)
18f65c79	265	{
91c665b0	266	struct ltv350qv *lcd = spi_get_drvdata(spi);
18f65c79 HS	267
	268	ltv350qv_power(lcd, FB_BLANK_POWERDOWN);
	269	lcd_device_unregister(lcd->ld);
18f65c79 HS	270
	271	return 0;
	272	}
	273
a71ed77b JH	274	#ifdef CONFIG_PM_SLEEP
a71ed77b JH	275	static int ltv350qv_suspend(struct device *dev)
18f65c79	276	{
a71ed77b	277	struct ltv350qv *lcd = dev_get_drvdata(dev);
18f65c79 HS	278
	279	return ltv350qv_power(lcd, FB_BLANK_POWERDOWN);
	280	}
	281
a71ed77b	282	static int ltv350qv_resume(struct device *dev)
18f65c79	283	{
a71ed77b	284	struct ltv350qv *lcd = dev_get_drvdata(dev);
18f65c79 HS	285
	286	return ltv350qv_power(lcd, FB_BLANK_UNBLANK);
	287	}
18f65c79 HS	288	#endif
18f65c79 HS	289
a71ed77b JH	290	static SIMPLE_DEV_PM_OPS(ltv350qv_pm_ops, ltv350qv_suspend, ltv350qv_resume);
a71ed77b JH	291
18f65c79 HS	292	/* Power down all displays on reboot, poweroff or halt */
	293	static void ltv350qv_shutdown(struct spi_device *spi)
	294	{
91c665b0	295	struct ltv350qv *lcd = spi_get_drvdata(spi);
18f65c79 HS	296
	297	ltv350qv_power(lcd, FB_BLANK_POWERDOWN);
	298	}
	299
	300	static struct spi_driver ltv350qv_driver = {
	301	.driver = {
	302	.name = "ltv350qv",
18f65c79	303	.owner = THIS_MODULE,
a71ed77b	304	.pm = &ltv350qv_pm_ops,
18f65c79 HS	305	},
	306
	307	.probe = ltv350qv_probe,
d1723fa2	308	.remove = ltv350qv_remove,
18f65c79	309	.shutdown = ltv350qv_shutdown,
18f65c79 HS	310	};
18f65c79 HS	311
462dd838	312	module_spi_driver(ltv350qv_driver);
18f65c79	313
e05503ef	314	MODULE_AUTHOR("Haavard Skinnemoen (Atmel)");
18f65c79 HS	315	MODULE_DESCRIPTION("Samsung LTV350QV LCD Driver");
18f65c79 HS	316	MODULE_LICENSE("GPL");
e0626e38	317	MODULE_ALIAS("spi:ltv350qv");