2 * Copyright (C) 2012 Simon Budig, <simon.budig@kernelconcepts.de>
3 * Lothar Waßmann <LW@KARO-electronics.de> (DT support)
5 * This software is licensed under the terms of the GNU General Public
6 * License version 2, as published by the Free Software Foundation, and
7 * may be copied, distributed, and modified under those terms.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * This is a driver for the EDT "Polytouch" family of touch controllers
21 * based on the FocalTech FT5x06 line of chips.
23 * Development of this driver has been sponsored by Glyn:
24 * http://www.glyn.com/Products/Displays
27 #include <linux/module.h>
28 #include <linux/ratelimit.h>
29 #include <linux/interrupt.h>
30 #include <linux/input.h>
31 #include <linux/i2c.h>
32 #include <linux/uaccess.h>
33 #include <linux/delay.h>
34 #include <linux/debugfs.h>
35 #include <linux/slab.h>
36 #include <linux/gpio.h>
37 #include <linux/of_gpio.h>
38 #include <linux/input/mt.h>
39 #include <linux/input/edt-ft5x06.h>
41 #define MAX_SUPPORT_POINTS 5
43 #define WORK_REGISTER_THRESHOLD 0x00
44 #define WORK_REGISTER_REPORT_RATE 0x08
45 #define WORK_REGISTER_GAIN 0x30
46 #define WORK_REGISTER_OFFSET 0x31
47 #define WORK_REGISTER_NUM_X 0x33
48 #define WORK_REGISTER_NUM_Y 0x34
50 #define WORK_REGISTER_OPMODE 0x3c
51 #define FACTORY_REGISTER_OPMODE 0x01
53 #define TOUCH_EVENT_DOWN 0x00
54 #define TOUCH_EVENT_UP 0x01
55 #define TOUCH_EVENT_ON 0x02
56 #define TOUCH_EVENT_RESERVED 0x03
58 #define EDT_NAME_LEN 23
59 #define EDT_SWITCH_MODE_RETRIES 10
60 #define EDT_SWITCH_MODE_DELAY 5 /* msec */
61 #define EDT_RAW_DATA_RETRIES 100
62 #define EDT_RAW_DATA_DELAY 1 /* msec */
64 struct edt_ft5x06_ts_data {
65 struct i2c_client *client;
66 struct input_dev *input;
74 #if defined(CONFIG_DEBUG_FS)
75 struct dentry *debug_dir;
87 char name[EDT_NAME_LEN];
90 static int edt_ft5x06_ts_readwrite(struct i2c_client *client,
91 u16 wr_len, u8 *wr_buf,
92 u16 rd_len, u8 *rd_buf)
94 struct i2c_msg wrmsg[2];
99 wrmsg[i].addr = client->addr;
101 wrmsg[i].len = wr_len;
102 wrmsg[i].buf = wr_buf;
106 wrmsg[i].addr = client->addr;
107 wrmsg[i].flags = I2C_M_RD;
108 wrmsg[i].len = rd_len;
109 wrmsg[i].buf = rd_buf;
113 ret = i2c_transfer(client->adapter, wrmsg, i);
122 static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata,
128 for (i = 0; i < buflen - 1; i++)
131 if (crc != buf[buflen-1]) {
132 dev_err_ratelimited(&tsdata->client->dev,
133 "crc error: 0x%02x expected, got 0x%02x\n",
141 static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
143 struct edt_ft5x06_ts_data *tsdata = dev_id;
144 struct device *dev = &tsdata->client->dev;
147 int i, type, x, y, id;
150 memset(rdbuf, 0, sizeof(rdbuf));
152 error = edt_ft5x06_ts_readwrite(tsdata->client,
154 sizeof(rdbuf), rdbuf);
156 dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n",
161 if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa || rdbuf[2] != 26) {
162 dev_err_ratelimited(dev, "Unexpected header: %02x%02x%02x!\n",
163 rdbuf[0], rdbuf[1], rdbuf[2]);
167 if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, 26))
170 for (i = 0; i < MAX_SUPPORT_POINTS; i++) {
171 u8 *buf = &rdbuf[i * 4 + 5];
175 /* ignore Reserved events */
176 if (type == TOUCH_EVENT_RESERVED)
179 /* ignore TOUCH_DOWN events, might have bogus coordinates */
180 if (type == TOUCH_EVENT_DOWN)
183 x = ((buf[0] << 8) | buf[1]) & 0x0fff;
184 y = ((buf[2] << 8) | buf[3]) & 0x0fff;
185 id = (buf[2] >> 4) & 0x0f;
186 down = type != TOUCH_EVENT_UP;
188 input_mt_slot(tsdata->input, id);
189 input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, down);
194 input_report_abs(tsdata->input, ABS_MT_POSITION_X, x);
195 input_report_abs(tsdata->input, ABS_MT_POSITION_Y, y);
198 input_mt_report_pointer_emulation(tsdata->input, true);
199 input_sync(tsdata->input);
205 static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata,
210 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
211 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
213 wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2];
215 return edt_ft5x06_ts_readwrite(tsdata->client, 4, wrbuf, 0, NULL);
218 static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata,
221 u8 wrbuf[2], rdbuf[2];
224 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
225 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
226 wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
228 error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2, rdbuf);
232 if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) {
233 dev_err(&tsdata->client->dev,
234 "crc error: 0x%02x expected, got 0x%02x\n",
235 wrbuf[0] ^ wrbuf[1] ^ rdbuf[0], rdbuf[1]);
242 struct edt_ft5x06_attribute {
243 struct device_attribute dattr;
250 #define EDT_ATTR(_field, _mode, _addr, _limit_low, _limit_high) \
251 struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \
252 .dattr = __ATTR(_field, _mode, \
253 edt_ft5x06_setting_show, \
254 edt_ft5x06_setting_store), \
256 offsetof(struct edt_ft5x06_ts_data, _field), \
257 .limit_low = _limit_low, \
258 .limit_high = _limit_high, \
262 static ssize_t edt_ft5x06_setting_show(struct device *dev,
263 struct device_attribute *dattr,
266 struct i2c_client *client = to_i2c_client(dev);
267 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
268 struct edt_ft5x06_attribute *attr =
269 container_of(dattr, struct edt_ft5x06_attribute, dattr);
270 u8 *field = (u8 *)tsdata + attr->field_offset;
275 mutex_lock(&tsdata->mutex);
277 if (tsdata->factory_mode) {
282 val = edt_ft5x06_register_read(tsdata, attr->addr);
285 dev_err(&tsdata->client->dev,
286 "Failed to fetch attribute %s, error %d\n",
287 dattr->attr.name, error);
292 dev_warn(&tsdata->client->dev,
293 "%s: read (%d) and stored value (%d) differ\n",
294 dattr->attr.name, val, *field);
298 count = scnprintf(buf, PAGE_SIZE, "%d\n", val);
300 mutex_unlock(&tsdata->mutex);
301 return error ?: count;
304 static ssize_t edt_ft5x06_setting_store(struct device *dev,
305 struct device_attribute *dattr,
306 const char *buf, size_t count)
308 struct i2c_client *client = to_i2c_client(dev);
309 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
310 struct edt_ft5x06_attribute *attr =
311 container_of(dattr, struct edt_ft5x06_attribute, dattr);
312 u8 *field = (u8 *)tsdata + attr->field_offset;
316 mutex_lock(&tsdata->mutex);
318 if (tsdata->factory_mode) {
323 error = kstrtouint(buf, 0, &val);
327 if (val < attr->limit_low || val > attr->limit_high) {
332 error = edt_ft5x06_register_write(tsdata, attr->addr, val);
334 dev_err(&tsdata->client->dev,
335 "Failed to update attribute %s, error: %d\n",
336 dattr->attr.name, error);
343 mutex_unlock(&tsdata->mutex);
344 return error ?: count;
347 static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN, 0, 31);
348 static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET, 0, 31);
349 static EDT_ATTR(threshold, S_IWUSR | S_IRUGO,
350 WORK_REGISTER_THRESHOLD, 20, 80);
351 static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO,
352 WORK_REGISTER_REPORT_RATE, 3, 14);
354 static struct attribute *edt_ft5x06_attrs[] = {
355 &edt_ft5x06_attr_gain.dattr.attr,
356 &edt_ft5x06_attr_offset.dattr.attr,
357 &edt_ft5x06_attr_threshold.dattr.attr,
358 &edt_ft5x06_attr_report_rate.dattr.attr,
362 static const struct attribute_group edt_ft5x06_attr_group = {
363 .attrs = edt_ft5x06_attrs,
366 #ifdef CONFIG_DEBUG_FS
367 static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
369 struct i2c_client *client = tsdata->client;
370 int retries = EDT_SWITCH_MODE_RETRIES;
374 disable_irq(client->irq);
376 if (!tsdata->raw_buffer) {
377 tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y *
379 tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL);
380 if (!tsdata->raw_buffer) {
386 /* mode register is 0x3c when in the work mode */
387 error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03);
389 dev_err(&client->dev,
390 "failed to switch to factory mode, error %d\n", error);
394 tsdata->factory_mode = true;
396 mdelay(EDT_SWITCH_MODE_DELAY);
397 /* mode register is 0x01 when in factory mode */
398 ret = edt_ft5x06_register_read(tsdata, FACTORY_REGISTER_OPMODE);
401 } while (--retries > 0);
404 dev_err(&client->dev, "not in factory mode after %dms.\n",
405 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
413 kfree(tsdata->raw_buffer);
414 tsdata->raw_buffer = NULL;
415 tsdata->factory_mode = false;
416 enable_irq(client->irq);
421 static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata)
423 struct i2c_client *client = tsdata->client;
424 int retries = EDT_SWITCH_MODE_RETRIES;
428 /* mode register is 0x01 when in the factory mode */
429 error = edt_ft5x06_register_write(tsdata, FACTORY_REGISTER_OPMODE, 0x1);
431 dev_err(&client->dev,
432 "failed to switch to work mode, error: %d\n", error);
436 tsdata->factory_mode = false;
439 mdelay(EDT_SWITCH_MODE_DELAY);
440 /* mode register is 0x01 when in factory mode */
441 ret = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OPMODE);
444 } while (--retries > 0);
447 dev_err(&client->dev, "not in work mode after %dms.\n",
448 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
449 tsdata->factory_mode = true;
453 kfree(tsdata->raw_buffer);
454 tsdata->raw_buffer = NULL;
456 /* restore parameters */
457 edt_ft5x06_register_write(tsdata, WORK_REGISTER_THRESHOLD,
459 edt_ft5x06_register_write(tsdata, WORK_REGISTER_GAIN,
461 edt_ft5x06_register_write(tsdata, WORK_REGISTER_OFFSET,
463 edt_ft5x06_register_write(tsdata, WORK_REGISTER_REPORT_RATE,
464 tsdata->report_rate);
466 enable_irq(client->irq);
471 static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode)
473 struct edt_ft5x06_ts_data *tsdata = data;
475 *mode = tsdata->factory_mode;
480 static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode)
482 struct edt_ft5x06_ts_data *tsdata = data;
488 mutex_lock(&tsdata->mutex);
490 if (mode != tsdata->factory_mode) {
491 retval = mode ? edt_ft5x06_factory_mode(tsdata) :
492 edt_ft5x06_work_mode(tsdata);
495 mutex_unlock(&tsdata->mutex);
500 DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get,
501 edt_ft5x06_debugfs_mode_set, "%llu\n");
503 static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file,
504 char __user *buf, size_t count, loff_t *off)
506 struct edt_ft5x06_ts_data *tsdata = file->private_data;
507 struct i2c_client *client = tsdata->client;
508 int retries = EDT_RAW_DATA_RETRIES;
515 if (*off < 0 || *off >= tsdata->raw_bufsize)
518 mutex_lock(&tsdata->mutex);
520 if (!tsdata->factory_mode || !tsdata->raw_buffer) {
525 error = edt_ft5x06_register_write(tsdata, 0x08, 0x01);
527 dev_dbg(&client->dev,
528 "failed to write 0x08 register, error %d\n", error);
533 msleep(EDT_RAW_DATA_DELAY);
534 val = edt_ft5x06_register_read(tsdata, 0x08);
537 } while (--retries > 0);
541 dev_dbg(&client->dev,
542 "failed to read 0x08 register, error %d\n", error);
547 dev_dbg(&client->dev,
548 "timed out waiting for register to settle\n");
553 rdbuf = tsdata->raw_buffer;
554 colbytes = tsdata->num_y * sizeof(u16);
558 for (i = 0; i < tsdata->num_x; i++) {
559 wrbuf[2] = i; /* column index */
560 error = edt_ft5x06_ts_readwrite(tsdata->client,
561 sizeof(wrbuf), wrbuf,
569 read = min_t(size_t, count, tsdata->raw_bufsize - *off);
570 if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) {
577 mutex_unlock(&tsdata->mutex);
578 return error ?: read;
581 static const struct file_operations debugfs_raw_data_fops = {
583 .read = edt_ft5x06_debugfs_raw_data_read,
587 edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
588 const char *debugfs_name)
590 tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL);
591 if (!tsdata->debug_dir)
594 debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x);
595 debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y);
597 debugfs_create_file("mode", S_IRUSR | S_IWUSR,
598 tsdata->debug_dir, tsdata, &debugfs_mode_fops);
599 debugfs_create_file("raw_data", S_IRUSR,
600 tsdata->debug_dir, tsdata, &debugfs_raw_data_fops);
604 edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
606 if (tsdata->debug_dir)
607 debugfs_remove_recursive(tsdata->debug_dir);
608 kfree(tsdata->raw_buffer);
614 edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
615 const char *debugfs_name)
620 edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
624 #endif /* CONFIG_DEBUGFS */
626 static int edt_ft5x06_ts_reset(struct i2c_client *client,
627 struct edt_ft5x06_ts_data *tsdata)
631 if (gpio_is_valid(tsdata->wake_pin)) {
632 error = devm_gpio_request_one(&client->dev,
633 tsdata->wake_pin, GPIOF_OUT_INIT_LOW,
636 dev_err(&client->dev,
637 "Failed to request GPIO %d as wake pin, error %d\n",
638 tsdata->wake_pin, error);
643 gpio_set_value(tsdata->wake_pin, 1);
645 if (gpio_is_valid(tsdata->reset_pin)) {
646 /* this pulls reset down, enabling the low active reset */
647 error = devm_gpio_request_one(&client->dev,
648 tsdata->reset_pin, GPIOF_OUT_INIT_LOW,
651 dev_err(&client->dev,
652 "Failed to request GPIO %d as reset pin, error %d\n",
653 tsdata->reset_pin, error);
658 gpio_set_value(tsdata->reset_pin, 1);
665 static int edt_ft5x06_ts_identify(struct i2c_client *client,
669 u8 rdbuf[EDT_NAME_LEN];
673 error = edt_ft5x06_ts_readwrite(client, 1, "\xbb",
674 EDT_NAME_LEN - 1, rdbuf);
678 /* remove last '$' end marker */
679 rdbuf[EDT_NAME_LEN - 1] = '\0';
680 if (rdbuf[EDT_NAME_LEN - 2] == '$')
681 rdbuf[EDT_NAME_LEN - 2] = '\0';
683 /* look for Model/Version separator */
684 p = strchr(rdbuf, '*');
688 strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN);
689 strlcpy(fw_version, p ? p : "", EDT_NAME_LEN);
694 #define EDT_ATTR_CHECKSET(name, reg) \
695 if (pdata->name >= edt_ft5x06_attr_##name.limit_low && \
696 pdata->name <= edt_ft5x06_attr_##name.limit_high) \
697 edt_ft5x06_register_write(tsdata, reg, pdata->name)
699 #define EDT_GET_PROP(name, reg) { \
701 if (of_property_read_u32(np, #name, &val) == 0) \
702 edt_ft5x06_register_write(tsdata, reg, val); \
705 static void edt_ft5x06_ts_get_dt_defaults(struct device_node *np,
706 struct edt_ft5x06_ts_data *tsdata)
708 EDT_GET_PROP(threshold, WORK_REGISTER_THRESHOLD);
709 EDT_GET_PROP(gain, WORK_REGISTER_GAIN);
710 EDT_GET_PROP(offset, WORK_REGISTER_OFFSET);
714 edt_ft5x06_ts_get_defaults(struct edt_ft5x06_ts_data *tsdata,
715 const struct edt_ft5x06_platform_data *pdata)
717 if (!pdata->use_parameters)
720 /* pick up defaults from the platform data */
721 EDT_ATTR_CHECKSET(threshold, WORK_REGISTER_THRESHOLD);
722 EDT_ATTR_CHECKSET(gain, WORK_REGISTER_GAIN);
723 EDT_ATTR_CHECKSET(offset, WORK_REGISTER_OFFSET);
724 EDT_ATTR_CHECKSET(report_rate, WORK_REGISTER_REPORT_RATE);
728 edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata)
730 tsdata->threshold = edt_ft5x06_register_read(tsdata,
731 WORK_REGISTER_THRESHOLD);
732 tsdata->gain = edt_ft5x06_register_read(tsdata, WORK_REGISTER_GAIN);
733 tsdata->offset = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OFFSET);
734 tsdata->report_rate = edt_ft5x06_register_read(tsdata,
735 WORK_REGISTER_REPORT_RATE);
736 tsdata->num_x = edt_ft5x06_register_read(tsdata, WORK_REGISTER_NUM_X);
737 tsdata->num_y = edt_ft5x06_register_read(tsdata, WORK_REGISTER_NUM_Y);
741 static int edt_ft5x06_i2c_ts_probe_dt(struct device *dev,
742 struct edt_ft5x06_ts_data *tsdata)
744 struct device_node *np = dev->of_node;
747 * irq_pin is not needed for DT setup.
748 * irq is associated via 'interrupts' property in DT
750 tsdata->irq_pin = -EINVAL;
751 tsdata->reset_pin = of_get_named_gpio(np, "reset-gpios", 0);
752 tsdata->wake_pin = of_get_named_gpio(np, "wake-gpios", 0);
757 static inline int edt_ft5x06_i2c_ts_probe_dt(struct device *dev,
758 struct edt_ft5x06_ts_data *tsdata)
764 static int edt_ft5x06_ts_probe(struct i2c_client *client,
765 const struct i2c_device_id *id)
767 const struct edt_ft5x06_platform_data *pdata =
768 dev_get_platdata(&client->dev);
769 struct edt_ft5x06_ts_data *tsdata;
770 struct input_dev *input;
772 char fw_version[EDT_NAME_LEN];
774 dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
776 tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
778 dev_err(&client->dev, "failed to allocate driver data.\n");
783 error = edt_ft5x06_i2c_ts_probe_dt(&client->dev, tsdata);
785 dev_err(&client->dev,
786 "DT probe failed and no platform data present\n");
790 tsdata->reset_pin = pdata->reset_pin;
791 tsdata->irq_pin = pdata->irq_pin;
792 tsdata->wake_pin = -EINVAL;
795 error = edt_ft5x06_ts_reset(client, tsdata);
799 if (gpio_is_valid(tsdata->irq_pin)) {
800 error = devm_gpio_request_one(&client->dev, tsdata->irq_pin,
801 GPIOF_IN, "edt-ft5x06 irq");
803 dev_err(&client->dev,
804 "Failed to request GPIO %d, error %d\n",
805 tsdata->irq_pin, error);
810 input = devm_input_allocate_device(&client->dev);
812 dev_err(&client->dev, "failed to allocate input device.\n");
816 mutex_init(&tsdata->mutex);
817 tsdata->client = client;
818 tsdata->input = input;
819 tsdata->factory_mode = false;
821 error = edt_ft5x06_ts_identify(client, tsdata->name, fw_version);
823 dev_err(&client->dev, "touchscreen probe failed\n");
828 edt_ft5x06_ts_get_dt_defaults(client->dev.of_node, tsdata);
830 edt_ft5x06_ts_get_defaults(tsdata, pdata);
832 edt_ft5x06_ts_get_parameters(tsdata);
834 dev_dbg(&client->dev,
835 "Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
836 tsdata->name, fw_version, tsdata->num_x, tsdata->num_y);
838 input->name = tsdata->name;
839 input->id.bustype = BUS_I2C;
840 input->dev.parent = &client->dev;
842 __set_bit(EV_SYN, input->evbit);
843 __set_bit(EV_KEY, input->evbit);
844 __set_bit(EV_ABS, input->evbit);
845 __set_bit(BTN_TOUCH, input->keybit);
846 input_set_abs_params(input, ABS_X, 0, tsdata->num_x * 64 - 1, 0, 0);
847 input_set_abs_params(input, ABS_Y, 0, tsdata->num_y * 64 - 1, 0, 0);
848 input_set_abs_params(input, ABS_MT_POSITION_X,
849 0, tsdata->num_x * 64 - 1, 0, 0);
850 input_set_abs_params(input, ABS_MT_POSITION_Y,
851 0, tsdata->num_y * 64 - 1, 0, 0);
852 error = input_mt_init_slots(input, MAX_SUPPORT_POINTS, 0);
854 dev_err(&client->dev, "Unable to init MT slots.\n");
858 input_set_drvdata(input, tsdata);
859 i2c_set_clientdata(client, tsdata);
861 error = devm_request_threaded_irq(&client->dev, client->irq, NULL,
863 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
864 client->name, tsdata);
866 dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
870 error = sysfs_create_group(&client->dev.kobj, &edt_ft5x06_attr_group);
874 error = input_register_device(input);
876 goto err_remove_attrs;
878 edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
879 device_init_wakeup(&client->dev, 1);
881 dev_dbg(&client->dev,
882 "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n",
883 client->irq, tsdata->wake_pin, tsdata->reset_pin);
888 sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
892 static int edt_ft5x06_ts_remove(struct i2c_client *client)
894 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
896 edt_ft5x06_ts_teardown_debugfs(tsdata);
897 sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
902 #ifdef CONFIG_PM_SLEEP
903 static int edt_ft5x06_ts_suspend(struct device *dev)
905 struct i2c_client *client = to_i2c_client(dev);
907 if (device_may_wakeup(dev))
908 enable_irq_wake(client->irq);
913 static int edt_ft5x06_ts_resume(struct device *dev)
915 struct i2c_client *client = to_i2c_client(dev);
917 if (device_may_wakeup(dev))
918 disable_irq_wake(client->irq);
924 static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops,
925 edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume);
927 static const struct i2c_device_id edt_ft5x06_ts_id[] = {
928 { "edt-ft5x06", 0, },
931 MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id);
934 static const struct of_device_id edt_ft5x06_of_match[] = {
935 { .compatible = "edt,edt-ft5206", },
936 { .compatible = "edt,edt-ft5306", },
937 { .compatible = "edt,edt-ft5406", },
940 MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match);
943 static struct i2c_driver edt_ft5x06_ts_driver = {
945 .owner = THIS_MODULE,
946 .name = "edt_ft5x06",
947 .of_match_table = of_match_ptr(edt_ft5x06_of_match),
948 .pm = &edt_ft5x06_ts_pm_ops,
950 .id_table = edt_ft5x06_ts_id,
951 .probe = edt_ft5x06_ts_probe,
952 .remove = edt_ft5x06_ts_remove,
955 module_i2c_driver(edt_ft5x06_ts_driver);
957 MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>");
958 MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver");
959 MODULE_LICENSE("GPL");