[deliverable/linux.git] / drivers / input / touchscreen / pixcir_i2c_ts.c

/*
 * Driver for Pixcir I2C touchscreen controllers.
 *
 * Copyright (C) 2010-2011 Pixcir, Inc.
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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 library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <linux/delay.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/pixcir_ts.h>

struct pixcir_i2c_ts_data {
	struct i2c_client *client;
	struct input_dev *input;
	const struct pixcir_ts_platform_data *chip;
	bool running;
};

static void pixcir_ts_poscheck(struct pixcir_i2c_ts_data *data)
{
	struct pixcir_i2c_ts_data *tsdata = data;
	u8 rdbuf[10], wrbuf[1] = { 0 };
	u8 touch;
	int ret;

	ret = i2c_master_send(tsdata->client, wrbuf, sizeof(wrbuf));
	if (ret != sizeof(wrbuf)) {
		dev_err(&tsdata->client->dev,
			"%s: i2c_master_send failed(), ret=%d\n",
			__func__, ret);
		return;
	}

	ret = i2c_master_recv(tsdata->client, rdbuf, sizeof(rdbuf));
	if (ret != sizeof(rdbuf)) {
		dev_err(&tsdata->client->dev,
			"%s: i2c_master_recv failed(), ret=%d\n",
			__func__, ret);
		return;
	}

	touch = rdbuf[0];
	if (touch) {
		u16 posx1 = (rdbuf[3] << 8) | rdbuf[2];
		u16 posy1 = (rdbuf[5] << 8) | rdbuf[4];
		u16 posx2 = (rdbuf[7] << 8) | rdbuf[6];
		u16 posy2 = (rdbuf[9] << 8) | rdbuf[8];

		input_report_key(tsdata->input, BTN_TOUCH, 1);
		input_report_abs(tsdata->input, ABS_X, posx1);
		input_report_abs(tsdata->input, ABS_Y, posy1);

		input_report_abs(tsdata->input, ABS_MT_POSITION_X, posx1);
		input_report_abs(tsdata->input, ABS_MT_POSITION_Y, posy1);
		input_mt_sync(tsdata->input);

		if (touch == 2) {
			input_report_abs(tsdata->input,
					 ABS_MT_POSITION_X, posx2);
			input_report_abs(tsdata->input,
					 ABS_MT_POSITION_Y, posy2);
			input_mt_sync(tsdata->input);
		}
	} else {
		input_report_key(tsdata->input, BTN_TOUCH, 0);
	}

	input_sync(tsdata->input);
}

static irqreturn_t pixcir_ts_isr(int irq, void *dev_id)
{
	struct pixcir_i2c_ts_data *tsdata = dev_id;

	while (tsdata->running) {
		pixcir_ts_poscheck(tsdata);

		if (tsdata->chip->attb_read_val())
			break;

		msleep(20);
	}

	return IRQ_HANDLED;
}

static int pixcir_set_power_mode(struct pixcir_i2c_ts_data *ts,
				 enum pixcir_power_mode mode)
{
	struct device *dev = &ts->client->dev;
	int ret;

	ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_POWER_MODE);
	if (ret < 0) {
		dev_err(dev, "%s: can't read reg 0x%x : %d\n",
			__func__, PIXCIR_REG_POWER_MODE, ret);
		return ret;
	}

	ret &= ~PIXCIR_POWER_MODE_MASK;
	ret |= mode;

	/* Always AUTO_IDLE */
	ret |= PIXCIR_POWER_ALLOW_IDLE;

	ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_POWER_MODE, ret);
	if (ret < 0) {
		dev_err(dev, "%s: can't write reg 0x%x : %d\n",
			__func__, PIXCIR_REG_POWER_MODE, ret);
		return ret;
	}

	return 0;
}

/*
 * Set the interrupt mode for the device i.e. ATTB line behaviour
 *
 * @polarity : 1 for active high, 0 for active low.
 */
static int pixcir_set_int_mode(struct pixcir_i2c_ts_data *ts,
			       enum pixcir_int_mode mode, bool polarity)
{
	struct device *dev = &ts->client->dev;
	int ret;

	ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_INT_MODE);
	if (ret < 0) {
		dev_err(dev, "%s: can't read reg 0x%x : %d\n",
			__func__, PIXCIR_REG_INT_MODE, ret);
		return ret;
	}

	ret &= ~PIXCIR_INT_MODE_MASK;
	ret |= mode;

	if (polarity)
		ret |= PIXCIR_INT_POL_HIGH;
	else
		ret &= ~PIXCIR_INT_POL_HIGH;

	ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_INT_MODE, ret);
	if (ret < 0) {
		dev_err(dev, "%s: can't write reg 0x%x : %d\n",
			__func__, PIXCIR_REG_INT_MODE, ret);
		return ret;
	}

	return 0;
}

/*
 * Enable/disable interrupt generation
 */
static int pixcir_int_enable(struct pixcir_i2c_ts_data *ts, bool enable)
{
	struct device *dev = &ts->client->dev;
	int ret;

	ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_INT_MODE);
	if (ret < 0) {
		dev_err(dev, "%s: can't read reg 0x%x : %d\n",
			__func__, PIXCIR_REG_INT_MODE, ret);
		return ret;
	}

	if (enable)
		ret |= PIXCIR_INT_ENABLE;
	else
		ret &= ~PIXCIR_INT_ENABLE;

	ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_INT_MODE, ret);
	if (ret < 0) {
		dev_err(dev, "%s: can't write reg 0x%x : %d\n",
			__func__, PIXCIR_REG_INT_MODE, ret);
		return ret;
	}

	return 0;
}

static int pixcir_start(struct pixcir_i2c_ts_data *ts)
{
	struct device *dev = &ts->client->dev;
	int error;

	/* LEVEL_TOUCH interrupt with active low polarity */
	error = pixcir_set_int_mode(ts, PIXCIR_INT_LEVEL_TOUCH, 0);
	if (error) {
		dev_err(dev, "Failed to set interrupt mode: %d\n", error);
		return error;
	}

	ts->running = true;
	mb();	/* Update status before IRQ can fire */

	/* enable interrupt generation */
	error = pixcir_int_enable(ts, true);
	if (error) {
		dev_err(dev, "Failed to enable interrupt generation: %d\n",
			error);
		return error;
	}

	return 0;
}

static int pixcir_stop(struct pixcir_i2c_ts_data *ts)
{
	int error;

	/* Disable interrupt generation */
	error = pixcir_int_enable(ts, false);
	if (error) {
		dev_err(&ts->client->dev,
			"Failed to disable interrupt generation: %d\n",
			error);
		return error;
	}

	/* Exit ISR if running, no more report parsing */
	ts->running = false;
	mb();	/* update status before we synchronize irq */

	/* Wait till running ISR is complete */
	synchronize_irq(ts->client->irq);

	return 0;
}

static int pixcir_input_open(struct input_dev *dev)
{
	struct pixcir_i2c_ts_data *ts = input_get_drvdata(dev);

	return pixcir_start(ts);
}

static void pixcir_input_close(struct input_dev *dev)
{
	struct pixcir_i2c_ts_data *ts = input_get_drvdata(dev);

	pixcir_stop(ts);
}

#ifdef CONFIG_PM_SLEEP
static int pixcir_i2c_ts_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 pixcir_i2c_ts_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;
}
#endif

static SIMPLE_DEV_PM_OPS(pixcir_dev_pm_ops,
			 pixcir_i2c_ts_suspend, pixcir_i2c_ts_resume);

static int pixcir_i2c_ts_probe(struct i2c_client *client,
					 const struct i2c_device_id *id)
{
	const struct pixcir_ts_platform_data *pdata =
			dev_get_platdata(&client->dev);
	struct device *dev = &client->dev;
	struct pixcir_i2c_ts_data *tsdata;
	struct input_dev *input;
	int error;

	if (!pdata) {
		dev_err(&client->dev, "platform data not defined\n");
		return -EINVAL;
	}

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

	input = devm_input_allocate_device(dev);
	if (!input) {
		dev_err(dev, "Failed to allocate input device\n");
		return -ENOMEM;
	}

	tsdata->client = client;
	tsdata->input = input;
	tsdata->chip = pdata;

	input->name = client->name;
	input->id.bustype = BUS_I2C;
	input->open = pixcir_input_open;
	input->close = pixcir_input_close;
	input->dev.parent = &client->dev;

	__set_bit(EV_KEY, input->evbit);
	__set_bit(EV_ABS, input->evbit);
	__set_bit(BTN_TOUCH, input->keybit);
	input_set_abs_params(input, ABS_X, 0, pdata->x_max, 0, 0);
	input_set_abs_params(input, ABS_Y, 0, pdata->y_max, 0, 0);
	input_set_abs_params(input, ABS_MT_POSITION_X, 0, pdata->x_max, 0, 0);
	input_set_abs_params(input, ABS_MT_POSITION_Y, 0, pdata->y_max, 0, 0);

	input_set_drvdata(input, tsdata);

	error = devm_request_threaded_irq(dev, client->irq, NULL, pixcir_ts_isr,
					  IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
					  client->name, tsdata);
	if (error) {
		dev_err(dev, "failed to request irq %d\n", client->irq);
		return error;
	}

	/* Always be in IDLE mode to save power, device supports auto wake */
	error = pixcir_set_power_mode(tsdata, PIXCIR_POWER_IDLE);
	if (error) {
		dev_err(dev, "Failed to set IDLE mode\n");
		return error;
	}

	/* Stop device till opened */
	error = pixcir_stop(tsdata);
	if (error)
		return error;

	error = input_register_device(input);
	if (error)
		return error;

	device_init_wakeup(&client->dev, 1);

	return 0;
}

static int pixcir_i2c_ts_remove(struct i2c_client *client)
{
	device_init_wakeup(&client->dev, 0);

	return 0;
}

static const struct i2c_device_id pixcir_i2c_ts_id[] = {
	{ "pixcir_ts", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, pixcir_i2c_ts_id);

static struct i2c_driver pixcir_i2c_ts_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= "pixcir_ts",
		.pm	= &pixcir_dev_pm_ops,
	},
	.probe		= pixcir_i2c_ts_probe,
	.remove		= pixcir_i2c_ts_remove,
	.id_table	= pixcir_i2c_ts_id,
};

module_i2c_driver(pixcir_i2c_ts_driver);

MODULE_AUTHOR("Jianchun Bian <jcbian@pixcir.com.cn>, Dequan Meng <dqmeng@pixcir.com.cn>");
MODULE_DESCRIPTION("Pixcir I2C Touchscreen Driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
36a281e2 JB	1	/*
	2	* Driver for Pixcir I2C touchscreen controllers.
	3	*
	4	* Copyright (C) 2010-2011 Pixcir, Inc.
	5	*
	6	* This software is licensed under the terms of the GNU General Public
	7	* License version 2, as published by the Free Software Foundation, and
	8	* may be copied, distributed, and modified under those terms.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public
	16	* License along with this library; if not, write to the Free Software
	17	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18	*/
	19
	20	#include <linux/delay.h>
	21	#include <linux/module.h>
	22	#include <linux/interrupt.h>
	23	#include <linux/slab.h>
	24	#include <linux/i2c.h>
	25	#include <linux/input.h>
	26	#include <linux/input/pixcir_ts.h>
	27
	28	struct pixcir_i2c_ts_data {
	29	struct i2c_client *client;
	30	struct input_dev *input;
	31	const struct pixcir_ts_platform_data *chip;
3b36fbb0	32	bool running;
36a281e2 JB	33	};
	34
	35	static void pixcir_ts_poscheck(struct pixcir_i2c_ts_data *data)
	36	{
	37	struct pixcir_i2c_ts_data *tsdata = data;
	38	u8 rdbuf[10], wrbuf[1] = { 0 };
	39	u8 touch;
	40	int ret;
	41
	42	ret = i2c_master_send(tsdata->client, wrbuf, sizeof(wrbuf));
	43	if (ret != sizeof(wrbuf)) {
	44	dev_err(&tsdata->client->dev,
	45	"%s: i2c_master_send failed(), ret=%d\n",
	46	__func__, ret);
	47	return;
	48	}
	49
	50	ret = i2c_master_recv(tsdata->client, rdbuf, sizeof(rdbuf));
	51	if (ret != sizeof(rdbuf)) {
	52	dev_err(&tsdata->client->dev,
	53	"%s: i2c_master_recv failed(), ret=%d\n",
	54	__func__, ret);
	55	return;
	56	}
	57
	58	touch = rdbuf[0];
	59	if (touch) {
	60	u16 posx1 = (rdbuf[3] << 8) \| rdbuf[2];
	61	u16 posy1 = (rdbuf[5] << 8) \| rdbuf[4];
	62	u16 posx2 = (rdbuf[7] << 8) \| rdbuf[6];
	63	u16 posy2 = (rdbuf[9] << 8) \| rdbuf[8];
	64
	65	input_report_key(tsdata->input, BTN_TOUCH, 1);
	66	input_report_abs(tsdata->input, ABS_X, posx1);
	67	input_report_abs(tsdata->input, ABS_Y, posy1);
	68
	69	input_report_abs(tsdata->input, ABS_MT_POSITION_X, posx1);
	70	input_report_abs(tsdata->input, ABS_MT_POSITION_Y, posy1);
	71	input_mt_sync(tsdata->input);
	72
	73	if (touch == 2) {
	74	input_report_abs(tsdata->input,
	75	ABS_MT_POSITION_X, posx2);
	76	input_report_abs(tsdata->input,
	77	ABS_MT_POSITION_Y, posy2);
	78	input_mt_sync(tsdata->input);
	79	}
	80	} else {
	81	input_report_key(tsdata->input, BTN_TOUCH, 0);
	82	}
	83
	84	input_sync(tsdata->input);
	85	}
	86
	87	static irqreturn_t pixcir_ts_isr(int irq, void *dev_id)
	88	{
	89	struct pixcir_i2c_ts_data *tsdata = dev_id;
	90
3b36fbb0	91	while (tsdata->running) {
36a281e2 JB	92	pixcir_ts_poscheck(tsdata);
	93
	94	if (tsdata->chip->attb_read_val())
	95	break;
	96
	97	msleep(20);
	98	}
	99
	100	return IRQ_HANDLED;
	101	}
	102
3b36fbb0 RQ	103	static int pixcir_set_power_mode(struct pixcir_i2c_ts_data *ts,
	104	enum pixcir_power_mode mode)
	105	{
	106	struct device *dev = &ts->client->dev;
	107	int ret;
	108
	109	ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_POWER_MODE);
	110	if (ret < 0) {
	111	dev_err(dev, "%s: can't read reg 0x%x : %d\n",
	112	__func__, PIXCIR_REG_POWER_MODE, ret);
	113	return ret;
	114	}
	115
	116	ret &= ~PIXCIR_POWER_MODE_MASK;
	117	ret \|= mode;
	118
	119	/* Always AUTO_IDLE */
	120	ret \|= PIXCIR_POWER_ALLOW_IDLE;
	121
	122	ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_POWER_MODE, ret);
	123	if (ret < 0) {
	124	dev_err(dev, "%s: can't write reg 0x%x : %d\n",
	125	__func__, PIXCIR_REG_POWER_MODE, ret);
	126	return ret;
	127	}
	128
	129	return 0;
	130	}
	131
	132	/*
	133	* Set the interrupt mode for the device i.e. ATTB line behaviour
	134	*
	135	* @polarity : 1 for active high, 0 for active low.
	136	*/
	137	static int pixcir_set_int_mode(struct pixcir_i2c_ts_data *ts,
	138	enum pixcir_int_mode mode, bool polarity)
	139	{
	140	struct device *dev = &ts->client->dev;
	141	int ret;
	142
	143	ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_INT_MODE);
	144	if (ret < 0) {
	145	dev_err(dev, "%s: can't read reg 0x%x : %d\n",
	146	__func__, PIXCIR_REG_INT_MODE, ret);
	147	return ret;
	148	}
	149
	150	ret &= ~PIXCIR_INT_MODE_MASK;
	151	ret \|= mode;
	152
	153	if (polarity)
	154	ret \|= PIXCIR_INT_POL_HIGH;
	155	else
	156	ret &= ~PIXCIR_INT_POL_HIGH;
	157
	158	ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_INT_MODE, ret);
	159	if (ret < 0) {
	160	dev_err(dev, "%s: can't write reg 0x%x : %d\n",
	161	__func__, PIXCIR_REG_INT_MODE, ret);
	162	return ret;
	163	}
	164
	165	return 0;
	166	}
167
168	/*
169	* Enable/disable interrupt generation
170	*/
171	static int pixcir_int_enable(struct pixcir_i2c_ts_data *ts, bool enable)
172	{
173	struct device *dev = &ts->client->dev;
174	int ret;
175
176	ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_INT_MODE);
177	if (ret < 0) {
178	dev_err(dev, "%s: can't read reg 0x%x : %d\n",
179	__func__, PIXCIR_REG_INT_MODE, ret);
180	return ret;
181	}
182
183	if (enable)
184	ret \|= PIXCIR_INT_ENABLE;
185	else
186	ret &= ~PIXCIR_INT_ENABLE;
187
188	ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_INT_MODE, ret);
189	if (ret < 0) {
190	dev_err(dev, "%s: can't write reg 0x%x : %d\n",
191	__func__, PIXCIR_REG_INT_MODE, ret);
192	return ret;
193	}
194
195	return 0;
196	}
197
198	static int pixcir_start(struct pixcir_i2c_ts_data *ts)
199	{
200	struct device *dev = &ts->client->dev;
201	int error;
202
203	/* LEVEL_TOUCH interrupt with active low polarity */
204	error = pixcir_set_int_mode(ts, PIXCIR_INT_LEVEL_TOUCH, 0);
205	if (error) {
206	dev_err(dev, "Failed to set interrupt mode: %d\n", error);
207	return error;
208	}
209
210	ts->running = true;
211	mb(); /* Update status before IRQ can fire */
212
213	/* enable interrupt generation */
214	error = pixcir_int_enable(ts, true);
215	if (error) {
216	dev_err(dev, "Failed to enable interrupt generation: %d\n",
217	error);
218	return error;
219	}
220
221	return 0;
222	}
223
224	static int pixcir_stop(struct pixcir_i2c_ts_data *ts)
225	{
226	int error;
227
228	/* Disable interrupt generation */
229	error = pixcir_int_enable(ts, false);
230	if (error) {
231	dev_err(&ts->client->dev,
232	"Failed to disable interrupt generation: %d\n",
233	error);
234	return error;
235	}
236
237	/* Exit ISR if running, no more report parsing */
238	ts->running = false;
239	mb(); /* update status before we synchronize irq */
240
241	/* Wait till running ISR is complete */
242	synchronize_irq(ts->client->irq);
243
244	return 0;
245	}
246
247	static int pixcir_input_open(struct input_dev *dev)
248	{
249	struct pixcir_i2c_ts_data *ts = input_get_drvdata(dev);
250
251	return pixcir_start(ts);
252	}
253
254	static void pixcir_input_close(struct input_dev *dev)
255	{
256	struct pixcir_i2c_ts_data *ts = input_get_drvdata(dev);
257
258	pixcir_stop(ts);
259	}
260
36a281e2 JB	261	#ifdef CONFIG_PM_SLEEP
	262	static int pixcir_i2c_ts_suspend(struct device *dev)
	263	{
	264	struct i2c_client *client = to_i2c_client(dev);
	265
	266	if (device_may_wakeup(&client->dev))
	267	enable_irq_wake(client->irq);
	268
	269	return 0;
	270	}
	271
	272	static int pixcir_i2c_ts_resume(struct device *dev)
	273	{
	274	struct i2c_client *client = to_i2c_client(dev);
	275
	276	if (device_may_wakeup(&client->dev))
	277	disable_irq_wake(client->irq);
	278
	279	return 0;
	280	}
	281	#endif
	282
	283	static SIMPLE_DEV_PM_OPS(pixcir_dev_pm_ops,
	284	pixcir_i2c_ts_suspend, pixcir_i2c_ts_resume);
	285
5298cc4c	286	static int pixcir_i2c_ts_probe(struct i2c_client *client,
36a281e2 JB	287	const struct i2c_device_id *id)
36a281e2 JB	288	{
c838cb3d JH	289	const struct pixcir_ts_platform_data *pdata =
c838cb3d JH	290	dev_get_platdata(&client->dev);
e9d4718d	291	struct device *dev = &client->dev;
36a281e2 JB	292	struct pixcir_i2c_ts_data *tsdata;
	293	struct input_dev *input;
	294	int error;
	295
	296	if (!pdata) {
	297	dev_err(&client->dev, "platform data not defined\n");
	298	return -EINVAL;
	299	}
	300
e9d4718d RQ	301	tsdata = devm_kzalloc(dev, sizeof(*tsdata), GFP_KERNEL);
	302	if (!tsdata)
	303	return -ENOMEM;
	304
	305	input = devm_input_allocate_device(dev);
	306	if (!input) {
	307	dev_err(dev, "Failed to allocate input device\n");
	308	return -ENOMEM;
36a281e2 JB	309	}
	310
	311	tsdata->client = client;
	312	tsdata->input = input;
	313	tsdata->chip = pdata;
	314
	315	input->name = client->name;
	316	input->id.bustype = BUS_I2C;
3b36fbb0 RQ	317	input->open = pixcir_input_open;
3b36fbb0 RQ	318	input->close = pixcir_input_close;
36a281e2 JB	319	input->dev.parent = &client->dev;
	320
	321	__set_bit(EV_KEY, input->evbit);
	322	__set_bit(EV_ABS, input->evbit);
	323	__set_bit(BTN_TOUCH, input->keybit);
	324	input_set_abs_params(input, ABS_X, 0, pdata->x_max, 0, 0);
	325	input_set_abs_params(input, ABS_Y, 0, pdata->y_max, 0, 0);
	326	input_set_abs_params(input, ABS_MT_POSITION_X, 0, pdata->x_max, 0, 0);
	327	input_set_abs_params(input, ABS_MT_POSITION_Y, 0, pdata->y_max, 0, 0);
	328
	329	input_set_drvdata(input, tsdata);
	330
e9d4718d RQ	331	error = devm_request_threaded_irq(dev, client->irq, NULL, pixcir_ts_isr,
	332	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT,
	333	client->name, tsdata);
36a281e2	334	if (error) {
e9d4718d RQ	335	dev_err(dev, "failed to request irq %d\n", client->irq);
e9d4718d RQ	336	return error;
36a281e2 JB	337	}
36a281e2 JB	338
3b36fbb0 RQ	339	/* Always be in IDLE mode to save power, device supports auto wake */
	340	error = pixcir_set_power_mode(tsdata, PIXCIR_POWER_IDLE);
	341	if (error) {
	342	dev_err(dev, "Failed to set IDLE mode\n");
	343	return error;
	344	}
	345
	346	/* Stop device till opened */
	347	error = pixcir_stop(tsdata);
	348	if (error)
	349	return error;
	350
36a281e2 JB	351	error = input_register_device(input);
36a281e2 JB	352	if (error)
e9d4718d	353	return error;
36a281e2	354
36a281e2 JB	355	device_init_wakeup(&client->dev, 1);
	356
	357	return 0;
36a281e2 JB	358	}
36a281e2 JB	359
e2619cf7	360	static int pixcir_i2c_ts_remove(struct i2c_client *client)
36a281e2	361	{
36a281e2 JB	362	device_init_wakeup(&client->dev, 0);
36a281e2 JB	363
36a281e2 JB	364	return 0;
	365	}
	366
	367	static const struct i2c_device_id pixcir_i2c_ts_id[] = {
	368	{ "pixcir_ts", 0 },
	369	{ }
	370	};
	371	MODULE_DEVICE_TABLE(i2c, pixcir_i2c_ts_id);
	372
	373	static struct i2c_driver pixcir_i2c_ts_driver = {
	374	.driver = {
	375	.owner = THIS_MODULE,
	376	.name = "pixcir_ts",
	377	.pm = &pixcir_dev_pm_ops,
	378	},
	379	.probe = pixcir_i2c_ts_probe,
1cb0aa88	380	.remove = pixcir_i2c_ts_remove,
36a281e2 JB	381	.id_table = pixcir_i2c_ts_id,
	382	};
	383
4a533835	384	module_i2c_driver(pixcir_i2c_ts_driver);
36a281e2 JB	385
	386	MODULE_AUTHOR("Jianchun Bian <jcbian@pixcir.com.cn>, Dequan Meng <dqmeng@pixcir.com.cn>");
	387	MODULE_DESCRIPTION("Pixcir I2C Touchscreen Driver");
	388	MODULE_LICENSE("GPL");