[linux-2.6-block.git] / drivers / input / touchscreen / ili210x.c

// SPDX-License-Identifier: GPL-2.0-only
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/gpio/consumer.h>
#include <linux/of_device.h>
#include <asm/unaligned.h>

#define ILI210X_TOUCHES		2
#define ILI251X_TOUCHES		10
#define DEFAULT_POLL_PERIOD	20

/* Touchscreen commands */
#define REG_TOUCHDATA		0x10
#define REG_PANEL_INFO		0x20
#define REG_FIRMWARE_VERSION	0x40
#define REG_CALIBRATE		0xcc

struct firmware_version {
	u8 id;
	u8 major;
	u8 minor;
} __packed;

enum ili2xxx_model {
	MODEL_ILI210X,
	MODEL_ILI251X,
};

struct ili210x {
	struct i2c_client *client;
	struct input_dev *input;
	unsigned int poll_period;
	struct delayed_work dwork;
	struct gpio_desc *reset_gpio;
	struct touchscreen_properties prop;
	enum ili2xxx_model model;
	unsigned int max_touches;
};

static int ili210x_read_reg(struct i2c_client *client, u8 reg, void *buf,
			    size_t len)
{
	struct ili210x *priv = i2c_get_clientdata(client);
	struct i2c_msg msg[2] = {
		{
			.addr	= client->addr,
			.flags	= 0,
			.len	= 1,
			.buf	= &reg,
		},
		{
			.addr	= client->addr,
			.flags	= I2C_M_RD,
			.len	= len,
			.buf	= buf,
		}
	};

	if (priv->model == MODEL_ILI251X) {
		if (i2c_transfer(client->adapter, msg, 1) != 1) {
			dev_err(&client->dev, "i2c transfer failed\n");
			return -EIO;
		}

		usleep_range(5000, 5500);

		if (i2c_transfer(client->adapter, msg + 1, 1) != 1) {
			dev_err(&client->dev, "i2c transfer failed\n");
			return -EIO;
		}
	} else {
		if (i2c_transfer(client->adapter, msg, 2) != 2) {
			dev_err(&client->dev, "i2c transfer failed\n");
			return -EIO;
		}
	}

	return 0;
}

static int ili210x_read(struct i2c_client *client, void *buf, size_t len)
{
	struct i2c_msg msg = {
		.addr	= client->addr,
		.flags	= I2C_M_RD,
		.len	= len,
		.buf	= buf,
	};

	if (i2c_transfer(client->adapter, &msg, 1) != 1) {
		dev_err(&client->dev, "i2c transfer failed\n");
		return -EIO;
	}

	return 0;
}

static bool ili210x_touchdata_to_coords(struct ili210x *priv, u8 *touchdata,
					unsigned int finger,
					unsigned int *x, unsigned int *y)
{
	if (finger >= ILI210X_TOUCHES)
		return false;

	if (touchdata[0] & BIT(finger))
		return false;

	*x = get_unaligned_be16(touchdata + 1 + (finger * 4) + 0);
	*y = get_unaligned_be16(touchdata + 1 + (finger * 4) + 2);

	return true;
}

static bool ili251x_touchdata_to_coords(struct ili210x *priv, u8 *touchdata,
					unsigned int finger,
					unsigned int *x, unsigned int *y)
{
	if (finger >= ILI251X_TOUCHES)
		return false;

	*x = get_unaligned_be16(touchdata + 1 + (finger * 5) + 0);
	if (!(*x & BIT(15)))	/* Touch indication */
		return false;

	*x &= 0x3fff;
	*y = get_unaligned_be16(touchdata + 1 + (finger * 5) + 2);

	return true;
}

static bool ili210x_report_events(struct ili210x *priv, u8 *touchdata)
{
	struct input_dev *input = priv->input;
	int i;
	bool contact = false, touch = false;
	unsigned int x = 0, y = 0;

	for (i = 0; i < priv->max_touches; i++) {
		if (priv->model == MODEL_ILI210X) {
			touch = ili210x_touchdata_to_coords(priv, touchdata,
							    i, &x, &y);
		} else if (priv->model == MODEL_ILI251X) {
			touch = ili251x_touchdata_to_coords(priv, touchdata,
							    i, &x, &y);
			if (touch)
				contact = true;
		}

		input_mt_slot(input, i);
		input_mt_report_slot_state(input, MT_TOOL_FINGER, touch);
		if (!touch)
			continue;
		touchscreen_report_pos(input, &priv->prop, x, y,
				       true);
	}

	input_mt_report_pointer_emulation(input, false);
	input_sync(input);

	if (priv->model == MODEL_ILI210X)
		contact = touchdata[0] & 0xf3;

	return contact;
}

static void ili210x_work(struct work_struct *work)
{
	struct ili210x *priv = container_of(work, struct ili210x,
					    dwork.work);
	struct i2c_client *client = priv->client;
	u8 touchdata[64] = { 0 };
	bool touch;
	int error = -EINVAL;

	if (priv->model == MODEL_ILI210X) {
		error = ili210x_read_reg(client, REG_TOUCHDATA,
					 touchdata, sizeof(touchdata));
	} else if (priv->model == MODEL_ILI251X) {
		error = ili210x_read_reg(client, REG_TOUCHDATA,
					 touchdata, 31);
		if (!error && touchdata[0] == 2)
			error = ili210x_read(client, &touchdata[31], 20);
	}

	if (error) {
		dev_err(&client->dev,
			"Unable to get touchdata, err = %d\n", error);
		return;
	}

	touch = ili210x_report_events(priv, touchdata);

	if (touch)
		schedule_delayed_work(&priv->dwork,
				      msecs_to_jiffies(priv->poll_period));
}

static irqreturn_t ili210x_irq(int irq, void *irq_data)
{
	struct ili210x *priv = irq_data;

	schedule_delayed_work(&priv->dwork, 0);

	return IRQ_HANDLED;
}

static ssize_t ili210x_calibrate(struct device *dev,
				 struct device_attribute *attr,
				 const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct ili210x *priv = i2c_get_clientdata(client);
	unsigned long calibrate;
	int rc;
	u8 cmd = REG_CALIBRATE;

	if (kstrtoul(buf, 10, &calibrate))
		return -EINVAL;

	if (calibrate > 1)
		return -EINVAL;

	if (calibrate) {
		rc = i2c_master_send(priv->client, &cmd, sizeof(cmd));
		if (rc != sizeof(cmd))
			return -EIO;
	}

	return count;
}
static DEVICE_ATTR(calibrate, S_IWUSR, NULL, ili210x_calibrate);

static struct attribute *ili210x_attributes[] = {
	&dev_attr_calibrate.attr,
	NULL,
};

static const struct attribute_group ili210x_attr_group = {
	.attrs = ili210x_attributes,
};

static void ili210x_power_down(void *data)
{
	struct gpio_desc *reset_gpio = data;

	gpiod_set_value_cansleep(reset_gpio, 1);
}

static void ili210x_cancel_work(void *data)
{
	struct ili210x *priv = data;

	cancel_delayed_work_sync(&priv->dwork);
}

static int ili210x_i2c_probe(struct i2c_client *client,
				       const struct i2c_device_id *id)
{
	struct device *dev = &client->dev;
	struct ili210x *priv;
	struct gpio_desc *reset_gpio;
	struct input_dev *input;
	struct firmware_version firmware;
	enum ili2xxx_model model;
	int error;

	model = (enum ili2xxx_model)id->driver_data;

	dev_dbg(dev, "Probing for ILI210X I2C Touschreen driver");

	if (client->irq <= 0) {
		dev_err(dev, "No IRQ!\n");
		return -EINVAL;
	}

	reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
	if (IS_ERR(reset_gpio))
		return PTR_ERR(reset_gpio);

	if (reset_gpio) {
		error = devm_add_action_or_reset(dev, ili210x_power_down,
						 reset_gpio);
		if (error)
			return error;

		usleep_range(50, 100);
		gpiod_set_value_cansleep(reset_gpio, 0);
		msleep(100);
	}

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	input = devm_input_allocate_device(dev);
	if (!input)
		return -ENOMEM;

	priv->client = client;
	priv->input = input;
	priv->poll_period = DEFAULT_POLL_PERIOD;
	INIT_DELAYED_WORK(&priv->dwork, ili210x_work);
	priv->reset_gpio = reset_gpio;
	priv->model = model;
	if (model == MODEL_ILI210X)
		priv->max_touches = ILI210X_TOUCHES;
	if (model == MODEL_ILI251X)
		priv->max_touches = ILI251X_TOUCHES;

	i2c_set_clientdata(client, priv);

	/* Get firmware version */
	error = ili210x_read_reg(client, REG_FIRMWARE_VERSION,
				 &firmware, sizeof(firmware));
	if (error) {
		dev_err(dev, "Failed to get firmware version, err: %d\n",
			error);
		return error;
	}

	/* Setup input device */
	input->name = "ILI210x Touchscreen";
	input->id.bustype = BUS_I2C;
	input->dev.parent = dev;

	/* Multi touch */
	input_set_abs_params(input, ABS_MT_POSITION_X, 0, 0xffff, 0, 0);
	input_set_abs_params(input, ABS_MT_POSITION_Y, 0, 0xffff, 0, 0);
	touchscreen_parse_properties(input, true, &priv->prop);
	input_mt_init_slots(input, priv->max_touches, INPUT_MT_DIRECT);

	error = devm_add_action(dev, ili210x_cancel_work, priv);
	if (error)
		return error;

	error = devm_request_irq(dev, client->irq, ili210x_irq, 0,
				 client->name, priv);
	if (error) {
		dev_err(dev, "Unable to request touchscreen IRQ, err: %d\n",
			error);
		return error;
	}

	error = devm_device_add_group(dev, &ili210x_attr_group);
	if (error) {
		dev_err(dev, "Unable to create sysfs attributes, err: %d\n",
			error);
		return error;
	}

	error = input_register_device(priv->input);
	if (error) {
		dev_err(dev, "Cannot register input device, err: %d\n", error);
		return error;
	}

	device_init_wakeup(dev, 1);

	dev_dbg(dev,
		"ILI210x initialized (IRQ: %d), firmware version %d.%d.%d",
		client->irq, firmware.id, firmware.major, firmware.minor);

	return 0;
}

static int __maybe_unused ili210x_i2c_suspend(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);

	if (device_may_wakeup(&client->dev))
		enable_irq_wake(client->irq);

	return 0;
}

static int __maybe_unused ili210x_i2c_resume(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);

	if (device_may_wakeup(&client->dev))
		disable_irq_wake(client->irq);

	return 0;
}

static SIMPLE_DEV_PM_OPS(ili210x_i2c_pm,
			 ili210x_i2c_suspend, ili210x_i2c_resume);

static const struct i2c_device_id ili210x_i2c_id[] = {
	{ "ili210x", MODEL_ILI210X },
	{ "ili251x", MODEL_ILI251X },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ili210x_i2c_id);

static const struct of_device_id ili210x_dt_ids[] = {
	{ .compatible = "ilitek,ili210x", .data = (void *)MODEL_ILI210X },
	{ .compatible = "ilitek,ili251x", .data = (void *)MODEL_ILI251X },
	{ },
};
MODULE_DEVICE_TABLE(of, ili210x_dt_ids);

static struct i2c_driver ili210x_ts_driver = {
	.driver = {
		.name = "ili210x_i2c",
		.pm = &ili210x_i2c_pm,
		.of_match_table = ili210x_dt_ids,
	},
	.id_table = ili210x_i2c_id,
	.probe = ili210x_i2c_probe,
};

module_i2c_driver(ili210x_ts_driver);

MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>");
MODULE_DESCRIPTION("ILI210X I2C Touchscreen Driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
09c434b8	1	// SPDX-License-Identifier: GPL-2.0-only
5c6a7a62 OS	2	#include <linux/module.h>
	3	#include <linux/i2c.h>
	4	#include <linux/interrupt.h>
	5	#include <linux/slab.h>
	6	#include <linux/input.h>
	7	#include <linux/input/mt.h>
f67cc3e9	8	#include <linux/input/touchscreen.h>
5c6a7a62 OS	9	#include <linux/delay.h>
5c6a7a62 OS	10	#include <linux/workqueue.h>
201f3c80	11	#include <linux/gpio/consumer.h>
49588917	12	#include <linux/of_device.h>
e3559442	13	#include <asm/unaligned.h>
5c6a7a62	14
49588917 MV	15	#define ILI210X_TOUCHES 2
49588917 MV	16	#define ILI251X_TOUCHES 10
5c6a7a62 OS	17	#define DEFAULT_POLL_PERIOD 20
	18
	19	/* Touchscreen commands */
	20	#define REG_TOUCHDATA 0x10
	21	#define REG_PANEL_INFO 0x20
	22	#define REG_FIRMWARE_VERSION 0x40
	23	#define REG_CALIBRATE 0xcc
	24
5c6a7a62 OS	25	struct firmware_version {
	26	u8 id;
	27	u8 major;
	28	u8 minor;
	29	} __packed;
	30
49588917 MV	31	enum ili2xxx_model {
	32	MODEL_ILI210X,
	33	MODEL_ILI251X,
	34	};
	35
5c6a7a62 OS	36	struct ili210x {
	37	struct i2c_client *client;
	38	struct input_dev *input;
5c6a7a62 OS	39	unsigned int poll_period;
5c6a7a62 OS	40	struct delayed_work dwork;
201f3c80	41	struct gpio_desc *reset_gpio;
f67cc3e9	42	struct touchscreen_properties prop;
49588917 MV	43	enum ili2xxx_model model;
49588917 MV	44	unsigned int max_touches;
5c6a7a62 OS	45	};
	46
	47	static int ili210x_read_reg(struct i2c_client client, u8 reg, void buf,
	48	size_t len)
	49	{
49588917	50	struct ili210x *priv = i2c_get_clientdata(client);
5c6a7a62 OS	51	struct i2c_msg msg[2] = {
	52	{
	53	.addr = client->addr,
	54	.flags = 0,
	55	.len = 1,
	56	.buf = &reg,
	57	},
	58	{
	59	.addr = client->addr,
	60	.flags = I2C_M_RD,
	61	.len = len,
	62	.buf = buf,
	63	}
	64	};
	65
49588917 MV	66	if (priv->model == MODEL_ILI251X) {
	67	if (i2c_transfer(client->adapter, msg, 1) != 1) {
	68	dev_err(&client->dev, "i2c transfer failed\n");
	69	return -EIO;
	70	}
	71
	72	usleep_range(5000, 5500);
	73
	74	if (i2c_transfer(client->adapter, msg + 1, 1) != 1) {
	75	dev_err(&client->dev, "i2c transfer failed\n");
	76	return -EIO;
	77	}
	78	} else {
	79	if (i2c_transfer(client->adapter, msg, 2) != 2) {
	80	dev_err(&client->dev, "i2c transfer failed\n");
	81	return -EIO;
	82	}
	83	}
	84
	85	return 0;
	86	}
	87
	88	static int ili210x_read(struct i2c_client client, void buf, size_t len)
	89	{
	90	struct i2c_msg msg = {
	91	.addr = client->addr,
	92	.flags = I2C_M_RD,
	93	.len = len,
	94	.buf = buf,
	95	};
	96
	97	if (i2c_transfer(client->adapter, &msg, 1) != 1) {
5c6a7a62 OS	98	dev_err(&client->dev, "i2c transfer failed\n");
	99	return -EIO;
	100	}
	101
	102	return 0;
	103	}
	104
e3559442 MV	105	static bool ili210x_touchdata_to_coords(struct ili210x priv, u8 touchdata,
	106	unsigned int finger,
	107	unsigned int x, unsigned int y)
	108	{
49588917	109	if (finger >= ILI210X_TOUCHES)
e3559442 MV	110	return false;
	111
	112	if (touchdata[0] & BIT(finger))
	113	return false;
	114
	115	x = get_unaligned_be16(touchdata + 1 + (finger 4) + 0);
	116	y = get_unaligned_be16(touchdata + 1 + (finger 4) + 2);
	117
	118	return true;
	119	}
	120
49588917 MV	121	static bool ili251x_touchdata_to_coords(struct ili210x priv, u8 touchdata,
	122	unsigned int finger,
	123	unsigned int x, unsigned int y)
	124	{
	125	if (finger >= ILI251X_TOUCHES)
	126	return false;
	127
	128	x = get_unaligned_be16(touchdata + 1 + (finger 5) + 0);
	129	if (!(x & BIT(15))) / Touch indication */
	130	return false;
	131
	132	*x &= 0x3fff;
	133	y = get_unaligned_be16(touchdata + 1 + (finger 5) + 2);
	134
	135	return true;
	136	}
	137
e3559442	138	static bool ili210x_report_events(struct ili210x priv, u8 touchdata)
5c6a7a62	139	{
e3559442	140	struct input_dev *input = priv->input;
5c6a7a62	141	int i;
49588917 MV	142	bool contact = false, touch = false;
49588917 MV	143	unsigned int x = 0, y = 0;
5c6a7a62	144
49588917	145	for (i = 0; i < priv->max_touches; i++) {
49588917 MV	146	if (priv->model == MODEL_ILI210X) {
	147	touch = ili210x_touchdata_to_coords(priv, touchdata,
	148	i, &x, &y);
	149	} else if (priv->model == MODEL_ILI251X) {
	150	touch = ili251x_touchdata_to_coords(priv, touchdata,
	151	i, &x, &y);
	152	if (touch)
	153	contact = true;
	154	}
	155
f67cc3e9	156	input_mt_slot(input, i);
5c6a7a62	157	input_mt_report_slot_state(input, MT_TOOL_FINGER, touch);
f67cc3e9 MV	158	if (!touch)
	159	continue;
	160	touchscreen_report_pos(input, &priv->prop, x, y,
	161	true);
5c6a7a62 OS	162	}
	163
	164	input_mt_report_pointer_emulation(input, false);
	165	input_sync(input);
e3559442	166
49588917 MV	167	if (priv->model == MODEL_ILI210X)
	168	contact = touchdata[0] & 0xf3;
	169
	170	return contact;
5c6a7a62 OS	171	}
5c6a7a62 OS	172
5c6a7a62 OS	173	static void ili210x_work(struct work_struct *work)
	174	{
	175	struct ili210x *priv = container_of(work, struct ili210x,
	176	dwork.work);
	177	struct i2c_client *client = priv->client;
49588917	178	u8 touchdata[64] = { 0 };
e3559442	179	bool touch;
49588917 MV	180	int error = -EINVAL;
	181
	182	if (priv->model == MODEL_ILI210X) {
	183	error = ili210x_read_reg(client, REG_TOUCHDATA,
	184	touchdata, sizeof(touchdata));
	185	} else if (priv->model == MODEL_ILI251X) {
	186	error = ili210x_read_reg(client, REG_TOUCHDATA,
	187	touchdata, 31);
	188	if (!error && touchdata[0] == 2)
	189	error = ili210x_read(client, &touchdata[31], 20);
	190	}
5c6a7a62	191
5c6a7a62 OS	192	if (error) {
	193	dev_err(&client->dev,
	194	"Unable to get touchdata, err = %d\n", error);
	195	return;
	196	}
	197
e3559442	198	touch = ili210x_report_events(priv, touchdata);
5c6a7a62	199
e3559442	200	if (touch)
5c6a7a62 OS	201	schedule_delayed_work(&priv->dwork,
	202	msecs_to_jiffies(priv->poll_period));
	203	}
	204
	205	static irqreturn_t ili210x_irq(int irq, void *irq_data)
	206	{
	207	struct ili210x *priv = irq_data;
	208
	209	schedule_delayed_work(&priv->dwork, 0);
	210
	211	return IRQ_HANDLED;
	212	}
	213
	214	static ssize_t ili210x_calibrate(struct device *dev,
	215	struct device_attribute *attr,
	216	const char *buf, size_t count)
	217	{
	218	struct i2c_client *client = to_i2c_client(dev);
	219	struct ili210x *priv = i2c_get_clientdata(client);
	220	unsigned long calibrate;
	221	int rc;
	222	u8 cmd = REG_CALIBRATE;
	223
	224	if (kstrtoul(buf, 10, &calibrate))
	225	return -EINVAL;
	226
	227	if (calibrate > 1)
	228	return -EINVAL;
	229
	230	if (calibrate) {
	231	rc = i2c_master_send(priv->client, &cmd, sizeof(cmd));
	232	if (rc != sizeof(cmd))
	233	return -EIO;
	234	}
	235
	236	return count;
	237	}
b27c0d0c	238	static DEVICE_ATTR(calibrate, S_IWUSR, NULL, ili210x_calibrate);
5c6a7a62 OS	239
	240	static struct attribute *ili210x_attributes[] = {
	241	&dev_attr_calibrate.attr,
	242	NULL,
	243	};
	244
	245	static const struct attribute_group ili210x_attr_group = {
	246	.attrs = ili210x_attributes,
	247	};
	248
201f3c80 MV	249	static void ili210x_power_down(void *data)
	250	{
	251	struct gpio_desc *reset_gpio = data;
	252
	253	gpiod_set_value_cansleep(reset_gpio, 1);
	254	}
	255
1bdec5d9 MV	256	static void ili210x_cancel_work(void *data)
	257	{
	258	struct ili210x *priv = data;
	259
	260	cancel_delayed_work_sync(&priv->dwork);
	261	}
	262
5298cc4c	263	static int ili210x_i2c_probe(struct i2c_client *client,
5c6a7a62 OS	264	const struct i2c_device_id *id)
	265	{
	266	struct device *dev = &client->dev;
5c6a7a62	267	struct ili210x *priv;
201f3c80	268	struct gpio_desc *reset_gpio;
5c6a7a62	269	struct input_dev *input;
5c6a7a62	270	struct firmware_version firmware;
49588917	271	enum ili2xxx_model model;
5c6a7a62 OS	272	int error;
5c6a7a62 OS	273
49588917 MV	274	model = (enum ili2xxx_model)id->driver_data;
49588917 MV	275
5c6a7a62 OS	276	dev_dbg(dev, "Probing for ILI210X I2C Touschreen driver");
5c6a7a62 OS	277
5c6a7a62 OS	278	if (client->irq <= 0) {
	279	dev_err(dev, "No IRQ!\n");
	280	return -EINVAL;
	281	}
	282
201f3c80 MV	283	reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
	284	if (IS_ERR(reset_gpio))
	285	return PTR_ERR(reset_gpio);
	286
	287	if (reset_gpio) {
	288	error = devm_add_action_or_reset(dev, ili210x_power_down,
	289	reset_gpio);
	290	if (error)
	291	return error;
	292
	293	usleep_range(50, 100);
	294	gpiod_set_value_cansleep(reset_gpio, 0);
	295	msleep(100);
	296	}
	297
12294577 MV	298	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	299	if (!priv)
	300	return -ENOMEM;
	301
	302	input = devm_input_allocate_device(dev);
	303	if (!input)
	304	return -ENOMEM;
	305
	306	priv->client = client;
	307	priv->input = input;
	308	priv->poll_period = DEFAULT_POLL_PERIOD;
	309	INIT_DELAYED_WORK(&priv->dwork, ili210x_work);
	310	priv->reset_gpio = reset_gpio;
49588917 MV	311	priv->model = model;
	312	if (model == MODEL_ILI210X)
	313	priv->max_touches = ILI210X_TOUCHES;
	314	if (model == MODEL_ILI251X)
	315	priv->max_touches = ILI251X_TOUCHES;
12294577 MV	316
	317	i2c_set_clientdata(client, priv);
	318
5c6a7a62 OS	319	/* Get firmware version */
	320	error = ili210x_read_reg(client, REG_FIRMWARE_VERSION,
	321	&firmware, sizeof(firmware));
	322	if (error) {
	323	dev_err(dev, "Failed to get firmware version, err: %d\n",
	324	error);
	325	return error;
	326	}
	327
5c6a7a62 OS	328	/* Setup input device */
	329	input->name = "ILI210x Touchscreen";
	330	input->id.bustype = BUS_I2C;
	331	input->dev.parent = dev;
	332
5c6a7a62	333	/* Multi touch */
f67cc3e9 MV	334	input_set_abs_params(input, ABS_MT_POSITION_X, 0, 0xffff, 0, 0);
	335	input_set_abs_params(input, ABS_MT_POSITION_Y, 0, 0xffff, 0, 0);
	336	touchscreen_parse_properties(input, true, &priv->prop);
	337	input_mt_init_slots(input, priv->max_touches, INPUT_MT_DIRECT);
5c6a7a62	338
1bdec5d9 MV	339	error = devm_add_action(dev, ili210x_cancel_work, priv);
	340	if (error)
	341	return error;
	342
	343	error = devm_request_irq(dev, client->irq, ili210x_irq, 0,
	344	client->name, priv);
5c6a7a62 OS	345	if (error) {
	346	dev_err(dev, "Unable to request touchscreen IRQ, err: %d\n",
	347	error);
1bdec5d9	348	return error;
5c6a7a62 OS	349	}
5c6a7a62 OS	350
576057bf	351	error = devm_device_add_group(dev, &ili210x_attr_group);
5c6a7a62 OS	352	if (error) {
	353	dev_err(dev, "Unable to create sysfs attributes, err: %d\n",
	354	error);
1bdec5d9	355	return error;
5c6a7a62 OS	356	}
	357
	358	error = input_register_device(priv->input);
	359	if (error) {
971bd8fa	360	dev_err(dev, "Cannot register input device, err: %d\n", error);
576057bf	361	return error;
5c6a7a62 OS	362	}
5c6a7a62 OS	363
d7ddf154	364	device_init_wakeup(dev, 1);
5c6a7a62 OS	365
	366	dev_dbg(dev,
	367	"ILI210x initialized (IRQ: %d), firmware version %d.%d.%d",
	368	client->irq, firmware.id, firmware.major, firmware.minor);
	369
	370	return 0;
5c6a7a62 OS	371	}
5c6a7a62 OS	372
02b6a58b	373	static int __maybe_unused ili210x_i2c_suspend(struct device *dev)
5c6a7a62 OS	374	{
	375	struct i2c_client *client = to_i2c_client(dev);
	376
	377	if (device_may_wakeup(&client->dev))
	378	enable_irq_wake(client->irq);
	379
	380	return 0;
	381	}
	382
02b6a58b	383	static int __maybe_unused ili210x_i2c_resume(struct device *dev)
5c6a7a62 OS	384	{
	385	struct i2c_client *client = to_i2c_client(dev);
	386
	387	if (device_may_wakeup(&client->dev))
	388	disable_irq_wake(client->irq);
	389
	390	return 0;
	391	}
5c6a7a62 OS	392
	393	static SIMPLE_DEV_PM_OPS(ili210x_i2c_pm,
	394	ili210x_i2c_suspend, ili210x_i2c_resume);
	395
	396	static const struct i2c_device_id ili210x_i2c_id[] = {
49588917 MV	397	{ "ili210x", MODEL_ILI210X },
49588917 MV	398	{ "ili251x", MODEL_ILI251X },
5c6a7a62 OS	399	{ }
	400	};
	401	MODULE_DEVICE_TABLE(i2c, ili210x_i2c_id);
	402
c5d0e4b5	403	static const struct of_device_id ili210x_dt_ids[] = {
49588917 MV	404	{ .compatible = "ilitek,ili210x", .data = (void *)MODEL_ILI210X },
49588917 MV	405	{ .compatible = "ilitek,ili251x", .data = (void *)MODEL_ILI251X },
c5d0e4b5 MV	406	{ },
	407	};
	408	MODULE_DEVICE_TABLE(of, ili210x_dt_ids);
	409
5c6a7a62 OS	410	static struct i2c_driver ili210x_ts_driver = {
	411	.driver = {
	412	.name = "ili210x_i2c",
5c6a7a62	413	.pm = &ili210x_i2c_pm,
c5d0e4b5	414	.of_match_table = ili210x_dt_ids,
5c6a7a62 OS	415	},
	416	.id_table = ili210x_i2c_id,
	417	.probe = ili210x_i2c_probe,
5c6a7a62 OS	418	};
	419
	420	module_i2c_driver(ili210x_ts_driver);
	421
	422	MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>");
	423	MODULE_DESCRIPTION("ILI210X I2C Touchscreen Driver");
	424	MODULE_LICENSE("GPL");