2 * Copyright (C) 2012 Simon Budig, <simon.budig@kernelconcepts.de>
4 * This software is licensed under the terms of the GNU General Public
5 * License version 2, as published by the Free Software Foundation, and
6 * may be copied, distributed, and modified under those terms.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this library; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 * This is a driver for the EDT "Polytouch" family of touch controllers
20 * based on the FocalTech FT5x06 line of chips.
22 * Development of this driver has been sponsored by Glyn:
23 * http://www.glyn.com/Products/Displays
26 #include <linux/module.h>
27 #include <linux/ratelimit.h>
28 #include <linux/interrupt.h>
29 #include <linux/input.h>
30 #include <linux/i2c.h>
31 #include <linux/uaccess.h>
32 #include <linux/delay.h>
33 #include <linux/debugfs.h>
34 #include <linux/slab.h>
35 #include <linux/gpio.h>
36 #include <linux/input/mt.h>
37 #include <linux/input/edt-ft5x06.h>
39 #define MAX_SUPPORT_POINTS 5
41 #define WORK_REGISTER_THRESHOLD 0x00
42 #define WORK_REGISTER_REPORT_RATE 0x08
43 #define WORK_REGISTER_GAIN 0x30
44 #define WORK_REGISTER_OFFSET 0x31
45 #define WORK_REGISTER_NUM_X 0x33
46 #define WORK_REGISTER_NUM_Y 0x34
48 #define WORK_REGISTER_OPMODE 0x3c
49 #define FACTORY_REGISTER_OPMODE 0x01
51 #define TOUCH_EVENT_DOWN 0x00
52 #define TOUCH_EVENT_UP 0x01
53 #define TOUCH_EVENT_ON 0x02
54 #define TOUCH_EVENT_RESERVED 0x03
56 #define EDT_NAME_LEN 23
57 #define EDT_SWITCH_MODE_RETRIES 10
58 #define EDT_SWITCH_MODE_DELAY 5 /* msec */
59 #define EDT_RAW_DATA_RETRIES 100
60 #define EDT_RAW_DATA_DELAY 1 /* msec */
62 struct edt_ft5x06_ts_data {
63 struct i2c_client *client;
64 struct input_dev *input;
68 #if defined(CONFIG_DEBUG_FS)
69 struct dentry *debug_dir;
81 char name[EDT_NAME_LEN];
84 static int edt_ft5x06_ts_readwrite(struct i2c_client *client,
85 u16 wr_len, u8 *wr_buf,
86 u16 rd_len, u8 *rd_buf)
88 struct i2c_msg wrmsg[2];
93 wrmsg[i].addr = client->addr;
95 wrmsg[i].len = wr_len;
96 wrmsg[i].buf = wr_buf;
100 wrmsg[i].addr = client->addr;
101 wrmsg[i].flags = I2C_M_RD;
102 wrmsg[i].len = rd_len;
103 wrmsg[i].buf = rd_buf;
107 ret = i2c_transfer(client->adapter, wrmsg, i);
116 static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata,
122 for (i = 0; i < buflen - 1; i++)
125 if (crc != buf[buflen-1]) {
126 dev_err_ratelimited(&tsdata->client->dev,
127 "crc error: 0x%02x expected, got 0x%02x\n",
135 static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
137 struct edt_ft5x06_ts_data *tsdata = dev_id;
138 struct device *dev = &tsdata->client->dev;
141 int i, type, x, y, id;
144 memset(rdbuf, 0, sizeof(rdbuf));
146 error = edt_ft5x06_ts_readwrite(tsdata->client,
148 sizeof(rdbuf), rdbuf);
150 dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n",
155 if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa || rdbuf[2] != 26) {
156 dev_err_ratelimited(dev, "Unexpected header: %02x%02x%02x!\n",
157 rdbuf[0], rdbuf[1], rdbuf[2]);
161 if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, 26))
164 for (i = 0; i < MAX_SUPPORT_POINTS; i++) {
165 u8 *buf = &rdbuf[i * 4 + 5];
169 /* ignore Reserved events */
170 if (type == TOUCH_EVENT_RESERVED)
173 x = ((buf[0] << 8) | buf[1]) & 0x0fff;
174 y = ((buf[2] << 8) | buf[3]) & 0x0fff;
175 id = (buf[2] >> 4) & 0x0f;
176 down = (type != TOUCH_EVENT_UP);
178 input_mt_slot(tsdata->input, id);
179 input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, down);
184 input_report_abs(tsdata->input, ABS_MT_POSITION_X, x);
185 input_report_abs(tsdata->input, ABS_MT_POSITION_Y, y);
188 input_mt_report_pointer_emulation(tsdata->input, true);
189 input_sync(tsdata->input);
195 static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata,
200 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
201 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
203 wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2];
205 return edt_ft5x06_ts_readwrite(tsdata->client, 4, wrbuf, 0, NULL);
208 static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata,
211 u8 wrbuf[2], rdbuf[2];
214 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
215 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
216 wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
218 error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2, rdbuf);
222 if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) {
223 dev_err(&tsdata->client->dev,
224 "crc error: 0x%02x expected, got 0x%02x\n",
225 wrbuf[0] ^ wrbuf[1] ^ rdbuf[0], rdbuf[1]);
232 struct edt_ft5x06_attribute {
233 struct device_attribute dattr;
240 #define EDT_ATTR(_field, _mode, _addr, _limit_low, _limit_high) \
241 struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \
242 .dattr = __ATTR(_field, _mode, \
243 edt_ft5x06_setting_show, \
244 edt_ft5x06_setting_store), \
246 offsetof(struct edt_ft5x06_ts_data, _field), \
247 .limit_low = _limit_low, \
248 .limit_high = _limit_high, \
252 static ssize_t edt_ft5x06_setting_show(struct device *dev,
253 struct device_attribute *dattr,
256 struct i2c_client *client = to_i2c_client(dev);
257 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
258 struct edt_ft5x06_attribute *attr =
259 container_of(dattr, struct edt_ft5x06_attribute, dattr);
260 u8 *field = (u8 *)((char *)tsdata + attr->field_offset);
265 mutex_lock(&tsdata->mutex);
267 if (tsdata->factory_mode) {
272 val = edt_ft5x06_register_read(tsdata, attr->addr);
275 dev_err(&tsdata->client->dev,
276 "Failed to fetch attribute %s, error %d\n",
277 dattr->attr.name, error);
282 dev_warn(&tsdata->client->dev,
283 "%s: read (%d) and stored value (%d) differ\n",
284 dattr->attr.name, val, *field);
288 count = scnprintf(buf, PAGE_SIZE, "%d\n", val);
290 mutex_unlock(&tsdata->mutex);
291 return error ?: count;
294 static ssize_t edt_ft5x06_setting_store(struct device *dev,
295 struct device_attribute *dattr,
296 const char *buf, size_t count)
298 struct i2c_client *client = to_i2c_client(dev);
299 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
300 struct edt_ft5x06_attribute *attr =
301 container_of(dattr, struct edt_ft5x06_attribute, dattr);
302 u8 *field = (u8 *)((char *)tsdata + attr->field_offset);
306 mutex_lock(&tsdata->mutex);
308 if (tsdata->factory_mode) {
313 error = kstrtouint(buf, 0, &val);
317 if (val < attr->limit_low || val > attr->limit_high) {
322 error = edt_ft5x06_register_write(tsdata, attr->addr, val);
324 dev_err(&tsdata->client->dev,
325 "Failed to update attribute %s, error: %d\n",
326 dattr->attr.name, error);
333 mutex_unlock(&tsdata->mutex);
334 return error ?: count;
337 static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN, 0, 31);
338 static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET, 0, 31);
339 static EDT_ATTR(threshold, S_IWUSR | S_IRUGO,
340 WORK_REGISTER_THRESHOLD, 20, 80);
341 static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO,
342 WORK_REGISTER_REPORT_RATE, 3, 14);
344 static struct attribute *edt_ft5x06_attrs[] = {
345 &edt_ft5x06_attr_gain.dattr.attr,
346 &edt_ft5x06_attr_offset.dattr.attr,
347 &edt_ft5x06_attr_threshold.dattr.attr,
348 &edt_ft5x06_attr_report_rate.dattr.attr,
352 static const struct attribute_group edt_ft5x06_attr_group = {
353 .attrs = edt_ft5x06_attrs,
356 #ifdef CONFIG_DEBUG_FS
357 static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
359 struct i2c_client *client = tsdata->client;
360 int retries = EDT_SWITCH_MODE_RETRIES;
364 disable_irq(client->irq);
366 if (!tsdata->raw_buffer) {
367 tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y *
369 tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL);
370 if (!tsdata->raw_buffer) {
376 /* mode register is 0x3c when in the work mode */
377 error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03);
379 dev_err(&client->dev,
380 "failed to switch to factory mode, error %d\n", error);
384 tsdata->factory_mode = true;
386 mdelay(EDT_SWITCH_MODE_DELAY);
387 /* mode register is 0x01 when in factory mode */
388 ret = edt_ft5x06_register_read(tsdata, FACTORY_REGISTER_OPMODE);
391 } while (--retries > 0);
394 dev_err(&client->dev, "not in factory mode after %dms.\n",
395 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
403 kfree(tsdata->raw_buffer);
404 tsdata->raw_buffer = NULL;
405 tsdata->factory_mode = false;
406 enable_irq(client->irq);
411 static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata)
413 struct i2c_client *client = tsdata->client;
414 int retries = EDT_SWITCH_MODE_RETRIES;
418 /* mode register is 0x01 when in the factory mode */
419 error = edt_ft5x06_register_write(tsdata, FACTORY_REGISTER_OPMODE, 0x1);
421 dev_err(&client->dev,
422 "failed to switch to work mode, error: %d\n", error);
426 tsdata->factory_mode = false;
429 mdelay(EDT_SWITCH_MODE_DELAY);
430 /* mode register is 0x01 when in factory mode */
431 ret = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OPMODE);
434 } while (--retries > 0);
437 dev_err(&client->dev, "not in work mode after %dms.\n",
438 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
439 tsdata->factory_mode = true;
443 if (tsdata->raw_buffer)
444 kfree(tsdata->raw_buffer);
445 tsdata->raw_buffer = NULL;
447 /* restore parameters */
448 edt_ft5x06_register_write(tsdata, WORK_REGISTER_THRESHOLD,
450 edt_ft5x06_register_write(tsdata, WORK_REGISTER_GAIN,
452 edt_ft5x06_register_write(tsdata, WORK_REGISTER_OFFSET,
454 edt_ft5x06_register_write(tsdata, WORK_REGISTER_REPORT_RATE,
455 tsdata->report_rate);
457 enable_irq(client->irq);
462 static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode)
464 struct edt_ft5x06_ts_data *tsdata = data;
466 *mode = tsdata->factory_mode;
471 static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode)
473 struct edt_ft5x06_ts_data *tsdata = data;
479 mutex_lock(&tsdata->mutex);
481 if (mode != tsdata->factory_mode) {
482 retval = mode ? edt_ft5x06_factory_mode(tsdata) :
483 edt_ft5x06_work_mode(tsdata);
486 mutex_unlock(&tsdata->mutex);
491 DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get,
492 edt_ft5x06_debugfs_mode_set, "%llu\n");
494 static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file,
495 char __user *buf, size_t count, loff_t *off)
497 struct edt_ft5x06_ts_data *tsdata = file->private_data;
498 struct i2c_client *client = tsdata->client;
499 int retries = EDT_RAW_DATA_RETRIES;
506 if (*off < 0 || *off >= tsdata->raw_bufsize)
509 mutex_lock(&tsdata->mutex);
511 if (!tsdata->factory_mode || !tsdata->raw_buffer) {
516 error = edt_ft5x06_register_write(tsdata, 0x08, 0x01);
518 dev_dbg(&client->dev,
519 "failed to write 0x08 register, error %d\n", error);
524 msleep(EDT_RAW_DATA_DELAY);
525 val = edt_ft5x06_register_read(tsdata, 0x08);
528 } while (--retries > 0);
532 dev_dbg(&client->dev,
533 "failed to read 0x08 register, error %d\n", error);
538 dev_dbg(&client->dev,
539 "timed out waiting for register to settle\n");
544 rdbuf = tsdata->raw_buffer;
545 colbytes = tsdata->num_y * sizeof(u16);
549 for (i = 0; i < tsdata->num_x; i++) {
550 wrbuf[2] = i; /* column index */
551 error = edt_ft5x06_ts_readwrite(tsdata->client,
552 sizeof(wrbuf), wrbuf,
560 read = min_t(size_t, count, tsdata->raw_bufsize - *off);
561 if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) {
568 mutex_unlock(&tsdata->mutex);
569 return error ?: read;
573 static const struct file_operations debugfs_raw_data_fops = {
575 .read = edt_ft5x06_debugfs_raw_data_read,
578 static void __devinit
579 edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
580 const char *debugfs_name)
582 tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL);
583 if (!tsdata->debug_dir)
586 debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x);
587 debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y);
589 debugfs_create_file("mode", S_IRUSR | S_IWUSR,
590 tsdata->debug_dir, tsdata, &debugfs_mode_fops);
591 debugfs_create_file("raw_data", S_IRUSR,
592 tsdata->debug_dir, tsdata, &debugfs_raw_data_fops);
595 static void __devexit
596 edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
598 if (tsdata->debug_dir)
599 debugfs_remove_recursive(tsdata->debug_dir);
600 kfree(tsdata->raw_buffer);
606 edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
607 const char *debugfs_name)
612 edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
616 #endif /* CONFIG_DEBUGFS */
620 static int __devinit edt_ft5x06_ts_reset(struct i2c_client *client,
625 if (gpio_is_valid(reset_pin)) {
626 /* this pulls reset down, enabling the low active reset */
627 error = gpio_request_one(reset_pin, GPIOF_OUT_INIT_LOW,
630 dev_err(&client->dev,
631 "Failed to request GPIO %d as reset pin, error %d\n",
637 gpio_set_value(reset_pin, 1);
644 static int __devinit edt_ft5x06_ts_identify(struct i2c_client *client,
648 u8 rdbuf[EDT_NAME_LEN];
652 error = edt_ft5x06_ts_readwrite(client, 1, "\xbb",
653 EDT_NAME_LEN - 1, rdbuf);
657 /* remove last '$' end marker */
658 rdbuf[EDT_NAME_LEN - 1] = '\0';
659 if (rdbuf[EDT_NAME_LEN - 2] == '$')
660 rdbuf[EDT_NAME_LEN - 2] = '\0';
662 /* look for Model/Version separator */
663 p = strchr(rdbuf, '*');
667 strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN);
668 strlcpy(fw_version, p ? p : "", EDT_NAME_LEN);
673 #define EDT_ATTR_CHECKSET(name, reg) \
674 if (pdata->name >= edt_ft5x06_attr_##name.limit_low && \
675 pdata->name <= edt_ft5x06_attr_##name.limit_high) \
676 edt_ft5x06_register_write(tsdata, reg, pdata->name)
678 static void __devinit
679 edt_ft5x06_ts_get_defaults(struct edt_ft5x06_ts_data *tsdata,
680 const struct edt_ft5x06_platform_data *pdata)
682 if (!pdata->use_parameters)
685 /* pick up defaults from the platform data */
686 EDT_ATTR_CHECKSET(threshold, WORK_REGISTER_THRESHOLD);
687 EDT_ATTR_CHECKSET(gain, WORK_REGISTER_GAIN);
688 EDT_ATTR_CHECKSET(offset, WORK_REGISTER_OFFSET);
689 EDT_ATTR_CHECKSET(report_rate, WORK_REGISTER_REPORT_RATE);
692 static void __devinit
693 edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata)
695 tsdata->threshold = edt_ft5x06_register_read(tsdata,
696 WORK_REGISTER_THRESHOLD);
697 tsdata->gain = edt_ft5x06_register_read(tsdata, WORK_REGISTER_GAIN);
698 tsdata->offset = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OFFSET);
699 tsdata->report_rate = edt_ft5x06_register_read(tsdata,
700 WORK_REGISTER_REPORT_RATE);
701 tsdata->num_x = edt_ft5x06_register_read(tsdata, WORK_REGISTER_NUM_X);
702 tsdata->num_y = edt_ft5x06_register_read(tsdata, WORK_REGISTER_NUM_Y);
705 static int __devinit edt_ft5x06_ts_probe(struct i2c_client *client,
706 const struct i2c_device_id *id)
708 const struct edt_ft5x06_platform_data *pdata =
709 client->dev.platform_data;
710 struct edt_ft5x06_ts_data *tsdata;
711 struct input_dev *input;
713 char fw_version[EDT_NAME_LEN];
715 dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
718 dev_err(&client->dev, "no platform data?\n");
722 error = edt_ft5x06_ts_reset(client, pdata->reset_pin);
726 if (gpio_is_valid(pdata->irq_pin)) {
727 error = gpio_request_one(pdata->irq_pin,
728 GPIOF_IN, "edt-ft5x06 irq");
730 dev_err(&client->dev,
731 "Failed to request GPIO %d, error %d\n",
732 pdata->irq_pin, error);
737 tsdata = kzalloc(sizeof(*tsdata), GFP_KERNEL);
738 input = input_allocate_device();
739 if (!tsdata || !input) {
740 dev_err(&client->dev, "failed to allocate driver data.\n");
745 mutex_init(&tsdata->mutex);
746 tsdata->client = client;
747 tsdata->input = input;
748 tsdata->factory_mode = false;
750 error = edt_ft5x06_ts_identify(client, tsdata->name, fw_version);
752 dev_err(&client->dev, "touchscreen probe failed\n");
756 edt_ft5x06_ts_get_defaults(tsdata, pdata);
757 edt_ft5x06_ts_get_parameters(tsdata);
759 dev_dbg(&client->dev,
760 "Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
761 tsdata->name, fw_version, tsdata->num_x, tsdata->num_y);
763 input->name = tsdata->name;
764 input->id.bustype = BUS_I2C;
765 input->dev.parent = &client->dev;
767 __set_bit(EV_SYN, input->evbit);
768 __set_bit(EV_KEY, input->evbit);
769 __set_bit(EV_ABS, input->evbit);
770 __set_bit(BTN_TOUCH, input->keybit);
771 input_set_abs_params(input, ABS_X, 0, tsdata->num_x * 64 - 1, 0, 0);
772 input_set_abs_params(input, ABS_Y, 0, tsdata->num_y * 64 - 1, 0, 0);
773 input_set_abs_params(input, ABS_MT_POSITION_X,
774 0, tsdata->num_x * 64 - 1, 0, 0);
775 input_set_abs_params(input, ABS_MT_POSITION_Y,
776 0, tsdata->num_y * 64 - 1, 0, 0);
777 error = input_mt_init_slots(input, MAX_SUPPORT_POINTS, 0);
779 dev_err(&client->dev, "Unable to init MT slots.\n");
783 input_set_drvdata(input, tsdata);
784 i2c_set_clientdata(client, tsdata);
786 error = request_threaded_irq(client->irq, NULL, edt_ft5x06_ts_isr,
787 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
788 client->name, tsdata);
790 dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
794 error = sysfs_create_group(&client->dev.kobj, &edt_ft5x06_attr_group);
798 error = input_register_device(input);
800 goto err_remove_attrs;
802 edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
803 device_init_wakeup(&client->dev, 1);
805 dev_dbg(&client->dev,
806 "EDT FT5x06 initialized: IRQ pin %d, Reset pin %d.\n",
807 pdata->irq_pin, pdata->reset_pin);
812 sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
814 free_irq(client->irq, tsdata);
816 input_free_device(input);
819 if (gpio_is_valid(pdata->irq_pin))
820 gpio_free(pdata->irq_pin);
825 static int __devexit edt_ft5x06_ts_remove(struct i2c_client *client)
827 const struct edt_ft5x06_platform_data *pdata =
828 dev_get_platdata(&client->dev);
829 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
831 edt_ft5x06_ts_teardown_debugfs(tsdata);
832 sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
834 free_irq(client->irq, tsdata);
835 input_unregister_device(tsdata->input);
837 if (gpio_is_valid(pdata->irq_pin))
838 gpio_free(pdata->irq_pin);
839 if (gpio_is_valid(pdata->reset_pin))
840 gpio_free(pdata->reset_pin);
847 #ifdef CONFIG_PM_SLEEP
848 static int edt_ft5x06_ts_suspend(struct device *dev)
850 struct i2c_client *client = to_i2c_client(dev);
852 if (device_may_wakeup(dev))
853 enable_irq_wake(client->irq);
858 static int edt_ft5x06_ts_resume(struct device *dev)
860 struct i2c_client *client = to_i2c_client(dev);
862 if (device_may_wakeup(dev))
863 disable_irq_wake(client->irq);
869 static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops,
870 edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume);
872 static const struct i2c_device_id edt_ft5x06_ts_id[] = {
876 MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id);
878 static struct i2c_driver edt_ft5x06_ts_driver = {
880 .owner = THIS_MODULE,
881 .name = "edt_ft5x06",
882 .pm = &edt_ft5x06_ts_pm_ops,
884 .id_table = edt_ft5x06_ts_id,
885 .probe = edt_ft5x06_ts_probe,
886 .remove = __devexit_p(edt_ft5x06_ts_remove),
889 module_i2c_driver(edt_ft5x06_ts_driver);
891 MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>");
892 MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver");
893 MODULE_LICENSE("GPL");