[mirror_ubuntu-hirsute-kernel.git] / drivers / input / touchscreen / ili210x.c

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