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/of_gpio.h>
37 #include <linux/input/mt.h>
38 #include <linux/input/edt-ft5x06.h>
40 #define MAX_SUPPORT_POINTS 5
42 #define WORK_REGISTER_THRESHOLD 0x00
43 #define WORK_REGISTER_REPORT_RATE 0x08
44 #define WORK_REGISTER_GAIN 0x30
45 #define WORK_REGISTER_OFFSET 0x31
46 #define WORK_REGISTER_NUM_X 0x33
47 #define WORK_REGISTER_NUM_Y 0x34
49 #define WORK_REGISTER_OPMODE 0x3c
50 #define FACTORY_REGISTER_OPMODE 0x01
52 #define TOUCH_EVENT_DOWN 0x00
53 #define TOUCH_EVENT_UP 0x01
54 #define TOUCH_EVENT_ON 0x02
55 #define TOUCH_EVENT_RESERVED 0x03
57 #define EDT_NAME_LEN 23
58 #define EDT_SWITCH_MODE_RETRIES 10
59 #define EDT_SWITCH_MODE_DELAY 5 /* msec */
60 #define EDT_RAW_DATA_RETRIES 100
61 #define EDT_RAW_DATA_DELAY 1 /* msec */
63 struct edt_ft5x06_ts_data {
64 struct i2c_client *client;
65 struct input_dev *input;
73 #if defined(CONFIG_DEBUG_FS)
74 struct dentry *debug_dir;
86 char name[EDT_NAME_LEN];
89 static int edt_ft5x06_ts_readwrite(struct i2c_client *client,
90 u16 wr_len, u8 *wr_buf,
91 u16 rd_len, u8 *rd_buf)
93 struct i2c_msg wrmsg[2];
98 wrmsg[i].addr = client->addr;
100 wrmsg[i].len = wr_len;
101 wrmsg[i].buf = wr_buf;
105 wrmsg[i].addr = client->addr;
106 wrmsg[i].flags = I2C_M_RD;
107 wrmsg[i].len = rd_len;
108 wrmsg[i].buf = rd_buf;
112 ret = i2c_transfer(client->adapter, wrmsg, i);
121 static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata,
127 for (i = 0; i < buflen - 1; i++)
130 if (crc != buf[buflen-1]) {
131 dev_err_ratelimited(&tsdata->client->dev,
132 "crc error: 0x%02x expected, got 0x%02x\n",
140 static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
142 struct edt_ft5x06_ts_data *tsdata = dev_id;
143 struct device *dev = &tsdata->client->dev;
146 int i, type, x, y, id;
149 memset(rdbuf, 0, sizeof(rdbuf));
151 error = edt_ft5x06_ts_readwrite(tsdata->client,
153 sizeof(rdbuf), rdbuf);
155 dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n",
160 if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa || rdbuf[2] != 26) {
161 dev_err_ratelimited(dev, "Unexpected header: %02x%02x%02x!\n",
162 rdbuf[0], rdbuf[1], rdbuf[2]);
166 if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, 26))
169 for (i = 0; i < MAX_SUPPORT_POINTS; i++) {
170 u8 *buf = &rdbuf[i * 4 + 5];
174 /* ignore Reserved events */
175 if (type == TOUCH_EVENT_RESERVED)
178 x = ((buf[0] << 8) | buf[1]) & 0x0fff;
179 y = ((buf[2] << 8) | buf[3]) & 0x0fff;
180 id = (buf[2] >> 4) & 0x0f;
181 down = (type != TOUCH_EVENT_UP);
183 input_mt_slot(tsdata->input, id);
184 input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, down);
189 input_report_abs(tsdata->input, ABS_MT_POSITION_X, x);
190 input_report_abs(tsdata->input, ABS_MT_POSITION_Y, y);
193 input_mt_report_pointer_emulation(tsdata->input, true);
194 input_sync(tsdata->input);
200 static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata,
205 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
206 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
208 wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2];
210 return edt_ft5x06_ts_readwrite(tsdata->client, 4, wrbuf, 0, NULL);
213 static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata,
216 u8 wrbuf[2], rdbuf[2];
219 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
220 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
221 wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
223 error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2, rdbuf);
227 if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) {
228 dev_err(&tsdata->client->dev,
229 "crc error: 0x%02x expected, got 0x%02x\n",
230 wrbuf[0] ^ wrbuf[1] ^ rdbuf[0], rdbuf[1]);
237 struct edt_ft5x06_attribute {
238 struct device_attribute dattr;
245 #define EDT_ATTR(_field, _mode, _addr, _limit_low, _limit_high) \
246 struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \
247 .dattr = __ATTR(_field, _mode, \
248 edt_ft5x06_setting_show, \
249 edt_ft5x06_setting_store), \
251 offsetof(struct edt_ft5x06_ts_data, _field), \
252 .limit_low = _limit_low, \
253 .limit_high = _limit_high, \
257 static ssize_t edt_ft5x06_setting_show(struct device *dev,
258 struct device_attribute *dattr,
261 struct i2c_client *client = to_i2c_client(dev);
262 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
263 struct edt_ft5x06_attribute *attr =
264 container_of(dattr, struct edt_ft5x06_attribute, dattr);
265 u8 *field = (u8 *)((char *)tsdata + attr->field_offset);
270 mutex_lock(&tsdata->mutex);
272 if (tsdata->factory_mode) {
277 val = edt_ft5x06_register_read(tsdata, attr->addr);
280 dev_err(&tsdata->client->dev,
281 "Failed to fetch attribute %s, error %d\n",
282 dattr->attr.name, error);
287 dev_warn(&tsdata->client->dev,
288 "%s: read (%d) and stored value (%d) differ\n",
289 dattr->attr.name, val, *field);
293 count = scnprintf(buf, PAGE_SIZE, "%d\n", val);
295 mutex_unlock(&tsdata->mutex);
296 return error ?: count;
299 static ssize_t edt_ft5x06_setting_store(struct device *dev,
300 struct device_attribute *dattr,
301 const char *buf, size_t count)
303 struct i2c_client *client = to_i2c_client(dev);
304 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
305 struct edt_ft5x06_attribute *attr =
306 container_of(dattr, struct edt_ft5x06_attribute, dattr);
307 u8 *field = (u8 *)((char *)tsdata + attr->field_offset);
311 mutex_lock(&tsdata->mutex);
313 if (tsdata->factory_mode) {
318 error = kstrtouint(buf, 0, &val);
322 if (val < attr->limit_low || val > attr->limit_high) {
327 error = edt_ft5x06_register_write(tsdata, attr->addr, val);
329 dev_err(&tsdata->client->dev,
330 "Failed to update attribute %s, error: %d\n",
331 dattr->attr.name, error);
338 mutex_unlock(&tsdata->mutex);
339 return error ?: count;
342 static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN, 0, 31);
343 static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET, 0, 31);
344 static EDT_ATTR(threshold, S_IWUSR | S_IRUGO,
345 WORK_REGISTER_THRESHOLD, 20, 80);
346 static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO,
347 WORK_REGISTER_REPORT_RATE, 3, 14);
349 static struct attribute *edt_ft5x06_attrs[] = {
350 &edt_ft5x06_attr_gain.dattr.attr,
351 &edt_ft5x06_attr_offset.dattr.attr,
352 &edt_ft5x06_attr_threshold.dattr.attr,
353 &edt_ft5x06_attr_report_rate.dattr.attr,
357 static const struct attribute_group edt_ft5x06_attr_group = {
358 .attrs = edt_ft5x06_attrs,
361 #ifdef CONFIG_DEBUG_FS
362 static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
364 struct i2c_client *client = tsdata->client;
365 int retries = EDT_SWITCH_MODE_RETRIES;
369 disable_irq(client->irq);
371 if (!tsdata->raw_buffer) {
372 tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y *
374 tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL);
375 if (!tsdata->raw_buffer) {
381 /* mode register is 0x3c when in the work mode */
382 error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03);
384 dev_err(&client->dev,
385 "failed to switch to factory mode, error %d\n", error);
389 tsdata->factory_mode = true;
391 mdelay(EDT_SWITCH_MODE_DELAY);
392 /* mode register is 0x01 when in factory mode */
393 ret = edt_ft5x06_register_read(tsdata, FACTORY_REGISTER_OPMODE);
396 } while (--retries > 0);
399 dev_err(&client->dev, "not in factory mode after %dms.\n",
400 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
408 kfree(tsdata->raw_buffer);
409 tsdata->raw_buffer = NULL;
410 tsdata->factory_mode = false;
411 enable_irq(client->irq);
416 static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata)
418 struct i2c_client *client = tsdata->client;
419 int retries = EDT_SWITCH_MODE_RETRIES;
423 /* mode register is 0x01 when in the factory mode */
424 error = edt_ft5x06_register_write(tsdata, FACTORY_REGISTER_OPMODE, 0x1);
426 dev_err(&client->dev,
427 "failed to switch to work mode, error: %d\n", error);
431 tsdata->factory_mode = false;
434 mdelay(EDT_SWITCH_MODE_DELAY);
435 /* mode register is 0x01 when in factory mode */
436 ret = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OPMODE);
439 } while (--retries > 0);
442 dev_err(&client->dev, "not in work mode after %dms.\n",
443 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
444 tsdata->factory_mode = true;
448 kfree(tsdata->raw_buffer);
449 tsdata->raw_buffer = NULL;
451 /* restore parameters */
452 edt_ft5x06_register_write(tsdata, WORK_REGISTER_THRESHOLD,
454 edt_ft5x06_register_write(tsdata, WORK_REGISTER_GAIN,
456 edt_ft5x06_register_write(tsdata, WORK_REGISTER_OFFSET,
458 edt_ft5x06_register_write(tsdata, WORK_REGISTER_REPORT_RATE,
459 tsdata->report_rate);
461 enable_irq(client->irq);
466 static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode)
468 struct edt_ft5x06_ts_data *tsdata = data;
470 *mode = tsdata->factory_mode;
475 static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode)
477 struct edt_ft5x06_ts_data *tsdata = data;
483 mutex_lock(&tsdata->mutex);
485 if (mode != tsdata->factory_mode) {
486 retval = mode ? edt_ft5x06_factory_mode(tsdata) :
487 edt_ft5x06_work_mode(tsdata);
490 mutex_unlock(&tsdata->mutex);
495 DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get,
496 edt_ft5x06_debugfs_mode_set, "%llu\n");
498 static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file,
499 char __user *buf, size_t count, loff_t *off)
501 struct edt_ft5x06_ts_data *tsdata = file->private_data;
502 struct i2c_client *client = tsdata->client;
503 int retries = EDT_RAW_DATA_RETRIES;
510 if (*off < 0 || *off >= tsdata->raw_bufsize)
513 mutex_lock(&tsdata->mutex);
515 if (!tsdata->factory_mode || !tsdata->raw_buffer) {
520 error = edt_ft5x06_register_write(tsdata, 0x08, 0x01);
522 dev_dbg(&client->dev,
523 "failed to write 0x08 register, error %d\n", error);
528 msleep(EDT_RAW_DATA_DELAY);
529 val = edt_ft5x06_register_read(tsdata, 0x08);
532 } while (--retries > 0);
536 dev_dbg(&client->dev,
537 "failed to read 0x08 register, error %d\n", error);
542 dev_dbg(&client->dev,
543 "timed out waiting for register to settle\n");
548 rdbuf = tsdata->raw_buffer;
549 colbytes = tsdata->num_y * sizeof(u16);
553 for (i = 0; i < tsdata->num_x; i++) {
554 wrbuf[2] = i; /* column index */
555 error = edt_ft5x06_ts_readwrite(tsdata->client,
556 sizeof(wrbuf), wrbuf,
564 read = min_t(size_t, count, tsdata->raw_bufsize - *off);
565 if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) {
572 mutex_unlock(&tsdata->mutex);
573 return error ?: read;
577 static const struct file_operations debugfs_raw_data_fops = {
579 .read = edt_ft5x06_debugfs_raw_data_read,
583 edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
584 const char *debugfs_name)
586 tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL);
587 if (!tsdata->debug_dir)
590 debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x);
591 debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y);
593 debugfs_create_file("mode", S_IRUSR | S_IWUSR,
594 tsdata->debug_dir, tsdata, &debugfs_mode_fops);
595 debugfs_create_file("raw_data", S_IRUSR,
596 tsdata->debug_dir, tsdata, &debugfs_raw_data_fops);
600 edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
602 if (tsdata->debug_dir)
603 debugfs_remove_recursive(tsdata->debug_dir);
604 kfree(tsdata->raw_buffer);
610 edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
611 const char *debugfs_name)
616 edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
620 #endif /* CONFIG_DEBUGFS */
624 static int edt_ft5x06_ts_reset(struct i2c_client *client,
625 struct edt_ft5x06_ts_data *tsdata)
629 if (gpio_is_valid(tsdata->wake_pin)) {
630 error = gpio_request_one(tsdata->wake_pin, GPIOF_OUT_INIT_LOW,
633 dev_err(&client->dev,
634 "Failed to request GPIO %d as wake pin, error %d\n",
635 tsdata->wake_pin, error);
640 gpio_set_value(tsdata->wake_pin, 1);
642 if (gpio_is_valid(tsdata->reset_pin)) {
643 /* this pulls reset down, enabling the low active reset */
644 error = gpio_request_one(tsdata->reset_pin, GPIOF_OUT_INIT_LOW,
647 dev_err(&client->dev,
648 "Failed to request GPIO %d as reset pin, error %d\n",
649 tsdata->reset_pin, error);
654 gpio_set_value(tsdata->reset_pin, 1);
661 static int edt_ft5x06_ts_identify(struct i2c_client *client,
665 u8 rdbuf[EDT_NAME_LEN];
669 error = edt_ft5x06_ts_readwrite(client, 1, "\xbb",
670 EDT_NAME_LEN - 1, rdbuf);
674 /* remove last '$' end marker */
675 rdbuf[EDT_NAME_LEN - 1] = '\0';
676 if (rdbuf[EDT_NAME_LEN - 2] == '$')
677 rdbuf[EDT_NAME_LEN - 2] = '\0';
679 /* look for Model/Version separator */
680 p = strchr(rdbuf, '*');
684 strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN);
685 strlcpy(fw_version, p ? p : "", EDT_NAME_LEN);
690 #define EDT_ATTR_CHECKSET(name, reg) \
691 if (pdata->name >= edt_ft5x06_attr_##name.limit_low && \
692 pdata->name <= edt_ft5x06_attr_##name.limit_high) \
693 edt_ft5x06_register_write(tsdata, reg, pdata->name)
695 #define EDT_GET_PROP(name, reg) { \
696 const u32 *prop = of_get_property(np, #name, NULL); \
698 edt_ft5x06_register_write(tsdata, reg, be32_to_cpu(*prop)); \
701 static void edt_ft5x06_ts_get_dt_defaults(struct device_node *np,
702 struct edt_ft5x06_ts_data *tsdata)
704 EDT_GET_PROP(threshold, WORK_REGISTER_THRESHOLD);
705 EDT_GET_PROP(gain, WORK_REGISTER_GAIN);
706 EDT_GET_PROP(offset, WORK_REGISTER_OFFSET);
707 EDT_GET_PROP(report_rate, WORK_REGISTER_REPORT_RATE);
711 edt_ft5x06_ts_get_defaults(struct edt_ft5x06_ts_data *tsdata,
712 const struct edt_ft5x06_platform_data *pdata)
714 if (!pdata->use_parameters)
717 /* pick up defaults from the platform data */
718 EDT_ATTR_CHECKSET(threshold, WORK_REGISTER_THRESHOLD);
719 EDT_ATTR_CHECKSET(gain, WORK_REGISTER_GAIN);
720 EDT_ATTR_CHECKSET(offset, WORK_REGISTER_OFFSET);
721 EDT_ATTR_CHECKSET(report_rate, WORK_REGISTER_REPORT_RATE);
725 edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata)
727 tsdata->threshold = edt_ft5x06_register_read(tsdata,
728 WORK_REGISTER_THRESHOLD);
729 tsdata->gain = edt_ft5x06_register_read(tsdata, WORK_REGISTER_GAIN);
730 tsdata->offset = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OFFSET);
731 tsdata->report_rate = edt_ft5x06_register_read(tsdata,
732 WORK_REGISTER_REPORT_RATE);
733 tsdata->num_x = edt_ft5x06_register_read(tsdata, WORK_REGISTER_NUM_X);
734 tsdata->num_y = edt_ft5x06_register_read(tsdata, WORK_REGISTER_NUM_Y);
738 static int edt_ft5x06_i2c_ts_probe_dt(struct device *dev,
739 struct edt_ft5x06_ts_data *tsdata)
742 struct device_node *np = dev->of_node;
743 enum of_gpio_flags gpio_flags;
749 * irq_pin is not needed for DT setup.
750 * irq is associated via 'interrupts' property in DT
752 tsdata->irq_pin = -EINVAL;
754 ret = of_get_named_gpio_flags(np, "reset-gpios", 0, &gpio_flags);
755 tsdata->reset_pin = ret;
757 ret = of_get_named_gpio_flags(np, "wake-gpios", 0, &gpio_flags);
758 tsdata->wake_pin = ret;
763 static inline int edt_ft5x06_i2c_ts_probe_dt(struct device *dev,
764 struct edt_ft5x06_i2c_ts_data *tsdata)
770 static int edt_ft5x06_ts_probe(struct i2c_client *client,
771 const struct i2c_device_id *id)
773 const struct edt_ft5x06_platform_data *pdata =
774 client->dev.platform_data;
775 struct edt_ft5x06_ts_data *tsdata;
776 struct input_dev *input;
778 char fw_version[EDT_NAME_LEN];
780 dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
782 tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
784 dev_err(&client->dev, "failed to allocate driver data.\n");
789 error = edt_ft5x06_i2c_ts_probe_dt(&client->dev, tsdata);
791 dev_err(&client->dev,
792 "DT probe failed and no platform data present\n");
796 tsdata->reset_pin = pdata->reset_pin;
797 tsdata->irq_pin = pdata->irq_pin;
798 tsdata->wake_pin = -EINVAL;
801 error = edt_ft5x06_ts_reset(client, tsdata);
805 if (gpio_is_valid(tsdata->irq_pin)) {
806 error = gpio_request_one(tsdata->irq_pin,
807 GPIOF_IN, "edt-ft5x06 irq");
809 dev_err(&client->dev,
810 "Failed to request GPIO %d, error %d\n",
811 tsdata->irq_pin, error);
816 input = input_allocate_device();
818 dev_err(&client->dev, "failed to allocate input device.\n");
823 mutex_init(&tsdata->mutex);
824 tsdata->client = client;
825 tsdata->input = input;
826 tsdata->factory_mode = false;
828 error = edt_ft5x06_ts_identify(client, tsdata->name, fw_version);
830 dev_err(&client->dev, "touchscreen probe failed\n");
835 edt_ft5x06_ts_get_dt_defaults(client->dev.of_node, tsdata);
837 edt_ft5x06_ts_get_defaults(tsdata, pdata);
839 edt_ft5x06_ts_get_parameters(tsdata);
841 dev_dbg(&client->dev,
842 "Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
843 tsdata->name, fw_version, tsdata->num_x, tsdata->num_y);
845 input->name = tsdata->name;
846 input->id.bustype = BUS_I2C;
847 input->dev.parent = &client->dev;
849 __set_bit(EV_SYN, input->evbit);
850 __set_bit(EV_KEY, input->evbit);
851 __set_bit(EV_ABS, input->evbit);
852 __set_bit(BTN_TOUCH, input->keybit);
853 input_set_abs_params(input, ABS_X, 0, tsdata->num_x * 64 - 1, 0, 0);
854 input_set_abs_params(input, ABS_Y, 0, tsdata->num_y * 64 - 1, 0, 0);
855 input_set_abs_params(input, ABS_MT_POSITION_X,
856 0, tsdata->num_x * 64 - 1, 0, 0);
857 input_set_abs_params(input, ABS_MT_POSITION_Y,
858 0, tsdata->num_y * 64 - 1, 0, 0);
859 error = input_mt_init_slots(input, MAX_SUPPORT_POINTS, 0);
861 dev_err(&client->dev, "Unable to init MT slots.\n");
865 input_set_drvdata(input, tsdata);
866 i2c_set_clientdata(client, tsdata);
868 error = request_threaded_irq(client->irq, NULL, edt_ft5x06_ts_isr,
869 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
870 client->name, tsdata);
872 dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
876 error = sysfs_create_group(&client->dev.kobj, &edt_ft5x06_attr_group);
880 error = input_register_device(input);
882 goto err_remove_attrs;
884 edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
885 device_init_wakeup(&client->dev, 1);
887 dev_dbg(&client->dev,
888 "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n",
889 client->irq, tsdata->wake_pin, tsdata->reset_pin);
894 sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
896 free_irq(client->irq, tsdata);
898 input_free_device(input);
899 if (gpio_is_valid(tsdata->irq_pin))
900 gpio_free(tsdata->irq_pin);
901 if (gpio_is_valid(tsdata->reset_pin))
902 gpio_free(tsdata->reset_pin);
903 if (gpio_is_valid(tsdata->wake_pin))
904 gpio_free(tsdata->wake_pin);
909 static int edt_ft5x06_ts_remove(struct i2c_client *client)
911 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
913 edt_ft5x06_ts_teardown_debugfs(tsdata);
914 sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
916 free_irq(client->irq, tsdata);
917 input_unregister_device(tsdata->input);
919 if (gpio_is_valid(tsdata->irq_pin))
920 gpio_free(tsdata->irq_pin);
921 if (gpio_is_valid(tsdata->reset_pin))
922 gpio_free(tsdata->reset_pin);
923 if (gpio_is_valid(tsdata->wake_pin))
924 gpio_free(tsdata->wake_pin);
929 #ifdef CONFIG_PM_SLEEP
930 static int edt_ft5x06_ts_suspend(struct device *dev)
932 struct i2c_client *client = to_i2c_client(dev);
934 if (device_may_wakeup(dev))
935 enable_irq_wake(client->irq);
940 static int edt_ft5x06_ts_resume(struct device *dev)
942 struct i2c_client *client = to_i2c_client(dev);
944 if (device_may_wakeup(dev))
945 disable_irq_wake(client->irq);
951 static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops,
952 edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume);
954 static const struct i2c_device_id edt_ft5x06_ts_id[] = {
955 { "edt-ft5x06", 0, },
958 MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id);
960 static const struct of_device_id edt_ft5x06_of_match[] = {
961 { .compatible = "edt,edt-ft5x06", },
964 MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match);
966 static struct i2c_driver edt_ft5x06_ts_driver = {
968 .owner = THIS_MODULE,
969 .name = "edt_ft5x06",
970 .of_match_table = edt_ft5x06_of_match,
971 .pm = &edt_ft5x06_ts_pm_ops,
973 .id_table = edt_ft5x06_ts_id,
974 .probe = edt_ft5x06_ts_probe,
975 .remove = edt_ft5x06_ts_remove,
978 module_i2c_driver(edt_ft5x06_ts_driver);
980 MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>");
981 MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver");
982 MODULE_LICENSE("GPL");
983 MODULE_ALIAS("platform:edt-ft5x06");