[thirdparty/kernel/stable.git] / drivers / video / backlight / lms283gf05.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * lms283gf05.c -- support for Samsung LMS283GF05 LCD
 *
 * Copyright (c) 2009 Marek Vasut <marek.vasut@gmail.com>
 */

#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/lcd.h>

#include <linux/spi/spi.h>
#include <linux/spi/lms283gf05.h>
#include <linux/module.h>

struct lms283gf05_state {
	struct spi_device	*spi;
	struct lcd_device	*ld;
};

struct lms283gf05_seq {
	unsigned char		reg;
	unsigned short		value;
	unsigned char		delay;
};

/* Magic sequences supplied by manufacturer, for details refer to datasheet */
static const struct lms283gf05_seq disp_initseq[] = {
	/* REG, VALUE, DELAY */
	{ 0x07, 0x0000, 0 },
	{ 0x13, 0x0000, 10 },

	{ 0x11, 0x3004, 0 },
	{ 0x14, 0x200F, 0 },
	{ 0x10, 0x1a20, 0 },
	{ 0x13, 0x0040, 50 },

	{ 0x13, 0x0060, 0 },
	{ 0x13, 0x0070, 200 },

	{ 0x01, 0x0127, 0 },
	{ 0x02,	0x0700, 0 },
	{ 0x03, 0x1030, 0 },
	{ 0x08, 0x0208, 0 },
	{ 0x0B, 0x0620, 0 },
	{ 0x0C, 0x0110, 0 },
	{ 0x30, 0x0120, 0 },
	{ 0x31, 0x0127, 0 },
	{ 0x32, 0x0000, 0 },
	{ 0x33, 0x0503, 0 },
	{ 0x34, 0x0727, 0 },
	{ 0x35, 0x0124, 0 },
	{ 0x36, 0x0706, 0 },
	{ 0x37, 0x0701, 0 },
	{ 0x38, 0x0F00, 0 },
	{ 0x39, 0x0F00, 0 },
	{ 0x40, 0x0000, 0 },
	{ 0x41, 0x0000, 0 },
	{ 0x42, 0x013f, 0 },
	{ 0x43, 0x0000, 0 },
	{ 0x44, 0x013f, 0 },
	{ 0x45, 0x0000, 0 },
	{ 0x46, 0xef00, 0 },
	{ 0x47, 0x013f, 0 },
	{ 0x48, 0x0000, 0 },
	{ 0x07, 0x0015, 30 },

	{ 0x07, 0x0017, 0 },

	{ 0x20, 0x0000, 0 },
	{ 0x21, 0x0000, 0 },
	{ 0x22, 0x0000, 0 }
};

static const struct lms283gf05_seq disp_pdwnseq[] = {
	{ 0x07, 0x0016, 30 },

	{ 0x07, 0x0004, 0 },
	{ 0x10, 0x0220, 20 },

	{ 0x13, 0x0060, 50 },

	{ 0x13, 0x0040, 50 },

	{ 0x13, 0x0000, 0 },
	{ 0x10, 0x0000, 0 }
};


static void lms283gf05_reset(unsigned long gpio, bool inverted)
{
	gpio_set_value(gpio, !inverted);
	mdelay(100);
	gpio_set_value(gpio, inverted);
	mdelay(20);
	gpio_set_value(gpio, !inverted);
	mdelay(20);
}

static void lms283gf05_toggle(struct spi_device *spi,
				const struct lms283gf05_seq *seq, int sz)
{
	char buf[3];
	int i;

	for (i = 0; i < sz; i++) {
		buf[0] = 0x74;
		buf[1] = 0x00;
		buf[2] = seq[i].reg;
		spi_write(spi, buf, 3);

		buf[0] = 0x76;
		buf[1] = seq[i].value >> 8;
		buf[2] = seq[i].value & 0xff;
		spi_write(spi, buf, 3);

		mdelay(seq[i].delay);
	}
}

static int lms283gf05_power_set(struct lcd_device *ld, int power)
{
	struct lms283gf05_state *st = lcd_get_data(ld);
	struct spi_device *spi = st->spi;
	struct lms283gf05_pdata *pdata = dev_get_platdata(&spi->dev);

	if (power <= FB_BLANK_NORMAL) {
		if (pdata)
			lms283gf05_reset(pdata->reset_gpio,
					pdata->reset_inverted);
		lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq));
	} else {
		lms283gf05_toggle(spi, disp_pdwnseq, ARRAY_SIZE(disp_pdwnseq));
		if (pdata)
			gpio_set_value(pdata->reset_gpio,
					pdata->reset_inverted);
	}

	return 0;
}

static struct lcd_ops lms_ops = {
	.set_power	= lms283gf05_power_set,
	.get_power	= NULL,
};

static int lms283gf05_probe(struct spi_device *spi)
{
	struct lms283gf05_state *st;
	struct lms283gf05_pdata *pdata = dev_get_platdata(&spi->dev);
	struct lcd_device *ld;
	int ret = 0;

	if (pdata != NULL) {
		ret = devm_gpio_request_one(&spi->dev, pdata->reset_gpio,
				GPIOF_DIR_OUT | (!pdata->reset_inverted ?
				GPIOF_INIT_HIGH : GPIOF_INIT_LOW),
				"LMS285GF05 RESET");
		if (ret)
			return ret;
	}

	st = devm_kzalloc(&spi->dev, sizeof(struct lms283gf05_state),
				GFP_KERNEL);
	if (st == NULL)
		return -ENOMEM;

	ld = devm_lcd_device_register(&spi->dev, "lms283gf05", &spi->dev, st,
					&lms_ops);
	if (IS_ERR(ld))
		return PTR_ERR(ld);

	st->spi = spi;
	st->ld = ld;

	spi_set_drvdata(spi, st);

	/* kick in the LCD */
	if (pdata)
		lms283gf05_reset(pdata->reset_gpio, pdata->reset_inverted);
	lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq));

	return 0;
}

static struct spi_driver lms283gf05_driver = {
	.driver = {
		.name	= "lms283gf05",
	},
	.probe		= lms283gf05_probe,
};

module_spi_driver(lms283gf05_driver);

MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
MODULE_DESCRIPTION("LCD283GF05 LCD");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
5036cc41 MV	2	/*
	3	* lms283gf05.c -- support for Samsung LMS283GF05 LCD
	4	*
	5	* Copyright (c) 2009 Marek Vasut <marek.vasut@gmail.com>
5036cc41 MV	6	*/
	7
	8	#include <linux/device.h>
	9	#include <linux/kernel.h>
	10	#include <linux/delay.h>
5a0e3ad6	11	#include <linux/slab.h>
5036cc41 MV	12	#include <linux/gpio.h>
	13	#include <linux/lcd.h>
	14
	15	#include <linux/spi/spi.h>
	16	#include <linux/spi/lms283gf05.h>
355b200b	17	#include <linux/module.h>
5036cc41 MV	18
	19	struct lms283gf05_state {
	20	struct spi_device *spi;
	21	struct lcd_device *ld;
	22	};
	23
	24	struct lms283gf05_seq {
	25	unsigned char reg;
	26	unsigned short value;
	27	unsigned char delay;
	28	};
	29
	30	/* Magic sequences supplied by manufacturer, for details refer to datasheet */
c22e61b3	31	static const struct lms283gf05_seq disp_initseq[] = {
5036cc41 MV	32	/* REG, VALUE, DELAY */
	33	{ 0x07, 0x0000, 0 },
	34	{ 0x13, 0x0000, 10 },
	35
	36	{ 0x11, 0x3004, 0 },
	37	{ 0x14, 0x200F, 0 },
	38	{ 0x10, 0x1a20, 0 },
	39	{ 0x13, 0x0040, 50 },
	40
	41	{ 0x13, 0x0060, 0 },
	42	{ 0x13, 0x0070, 200 },
	43
	44	{ 0x01, 0x0127, 0 },
	45	{ 0x02, 0x0700, 0 },
	46	{ 0x03, 0x1030, 0 },
	47	{ 0x08, 0x0208, 0 },
	48	{ 0x0B, 0x0620, 0 },
	49	{ 0x0C, 0x0110, 0 },
	50	{ 0x30, 0x0120, 0 },
	51	{ 0x31, 0x0127, 0 },
	52	{ 0x32, 0x0000, 0 },
	53	{ 0x33, 0x0503, 0 },
	54	{ 0x34, 0x0727, 0 },
	55	{ 0x35, 0x0124, 0 },
	56	{ 0x36, 0x0706, 0 },
	57	{ 0x37, 0x0701, 0 },
	58	{ 0x38, 0x0F00, 0 },
	59	{ 0x39, 0x0F00, 0 },
	60	{ 0x40, 0x0000, 0 },
	61	{ 0x41, 0x0000, 0 },
	62	{ 0x42, 0x013f, 0 },
	63	{ 0x43, 0x0000, 0 },
	64	{ 0x44, 0x013f, 0 },
	65	{ 0x45, 0x0000, 0 },
	66	{ 0x46, 0xef00, 0 },
	67	{ 0x47, 0x013f, 0 },
	68	{ 0x48, 0x0000, 0 },
	69	{ 0x07, 0x0015, 30 },
	70
	71	{ 0x07, 0x0017, 0 },
	72
	73	{ 0x20, 0x0000, 0 },
	74	{ 0x21, 0x0000, 0 },
	75	{ 0x22, 0x0000, 0 }
	76	};
	77
c22e61b3	78	static const struct lms283gf05_seq disp_pdwnseq[] = {
5036cc41 MV	79	{ 0x07, 0x0016, 30 },
	80
	81	{ 0x07, 0x0004, 0 },
	82	{ 0x10, 0x0220, 20 },
	83
	84	{ 0x13, 0x0060, 50 },
	85
	86	{ 0x13, 0x0040, 50 },
	87
	88	{ 0x13, 0x0000, 0 },
	89	{ 0x10, 0x0000, 0 }
	90	};
	91
	92
	93	static void lms283gf05_reset(unsigned long gpio, bool inverted)
	94	{
	95	gpio_set_value(gpio, !inverted);
	96	mdelay(100);
	97	gpio_set_value(gpio, inverted);
	98	mdelay(20);
	99	gpio_set_value(gpio, !inverted);
	100	mdelay(20);
	101	}
	102
	103	static void lms283gf05_toggle(struct spi_device *spi,
c22e61b3	104	const struct lms283gf05_seq *seq, int sz)
5036cc41 MV	105	{
	106	char buf[3];
	107	int i;
	108
	109	for (i = 0; i < sz; i++) {
	110	buf[0] = 0x74;
	111	buf[1] = 0x00;
	112	buf[2] = seq[i].reg;
	113	spi_write(spi, buf, 3);
	114
	115	buf[0] = 0x76;
	116	buf[1] = seq[i].value >> 8;
	117	buf[2] = seq[i].value & 0xff;
	118	spi_write(spi, buf, 3);
	119
	120	mdelay(seq[i].delay);
	121	}
	122	}
	123
	124	static int lms283gf05_power_set(struct lcd_device *ld, int power)
	125	{
	126	struct lms283gf05_state *st = lcd_get_data(ld);
	127	struct spi_device *spi = st->spi;
c512794c	128	struct lms283gf05_pdata *pdata = dev_get_platdata(&spi->dev);
5036cc41	129
6bde9082	130	if (power <= FB_BLANK_NORMAL) {
5036cc41 MV	131	if (pdata)
	132	lms283gf05_reset(pdata->reset_gpio,
	133	pdata->reset_inverted);
	134	lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq));
	135	} else {
	136	lms283gf05_toggle(spi, disp_pdwnseq, ARRAY_SIZE(disp_pdwnseq));
	137	if (pdata)
	138	gpio_set_value(pdata->reset_gpio,
	139	pdata->reset_inverted);
	140	}
	141
	142	return 0;
	143	}
	144
	145	static struct lcd_ops lms_ops = {
	146	.set_power = lms283gf05_power_set,
	147	.get_power = NULL,
	148	};
	149
1b9e450d	150	static int lms283gf05_probe(struct spi_device *spi)
5036cc41 MV	151	{
5036cc41 MV	152	struct lms283gf05_state *st;
c512794c	153	struct lms283gf05_pdata *pdata = dev_get_platdata(&spi->dev);
5036cc41 MV	154	struct lcd_device *ld;
	155	int ret = 0;
	156
	157	if (pdata != NULL) {
5a5a0743	158	ret = devm_gpio_request_one(&spi->dev, pdata->reset_gpio,
1eddd977 JH	159	GPIOF_DIR_OUT \| (!pdata->reset_inverted ?
1eddd977 JH	160	GPIOF_INIT_HIGH : GPIOF_INIT_LOW),
5a5a0743	161	"LMS285GF05 RESET");
5036cc41	162	if (ret)
04e961fb	163	return ret;
5036cc41 MV	164	}
5036cc41 MV	165
26f2b35c JH	166	st = devm_kzalloc(&spi->dev, sizeof(struct lms283gf05_state),
26f2b35c JH	167	GFP_KERNEL);
e1094f9f	168	if (st == NULL)
04e961fb	169	return -ENOMEM;
5036cc41	170
0a1c55d0 JH	171	ld = devm_lcd_device_register(&spi->dev, "lms283gf05", &spi->dev, st,
0a1c55d0 JH	172	&lms_ops);
04e961fb JH	173	if (IS_ERR(ld))
04e961fb JH	174	return PTR_ERR(ld);
5036cc41 MV	175
	176	st->spi = spi;
	177	st->ld = ld;
	178
b936fab0	179	spi_set_drvdata(spi, st);
5036cc41 MV	180
	181	/* kick in the LCD */
	182	if (pdata)
	183	lms283gf05_reset(pdata->reset_gpio, pdata->reset_inverted);
	184	lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq));
	185
	186	return 0;
5036cc41 MV	187	}
5036cc41 MV	188
5036cc41 MV	189	static struct spi_driver lms283gf05_driver = {
	190	.driver = {
	191	.name = "lms283gf05",
5036cc41 MV	192	},
5036cc41 MV	193	.probe = lms283gf05_probe,
5036cc41 MV	194	};
5036cc41 MV	195
462dd838	196	module_spi_driver(lms283gf05_driver);
5036cc41 MV	197
	198	MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
	199	MODULE_DESCRIPTION("LCD283GF05 LCD");
	200	MODULE_LICENSE("GPL v2");