2 * Copyright (C) 2012 Simon Budig, <simon.budig@kernelconcepts.de>
3 * Daniel Wagener <daniel.wagener@kernelconcepts.de> (M09 firmware support)
4 * Lothar Waßmann <LW@KARO-electronics.de> (DT support)
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.
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.
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
21 * This is a driver for the EDT "Polytouch" family of touch controllers
22 * based on the FocalTech FT5x06 line of chips.
24 * Development of this driver has been sponsored by Glyn:
25 * http://www.glyn.com/Products/Displays
28 #include <linux/module.h>
29 #include <linux/ratelimit.h>
30 #include <linux/irq.h>
31 #include <linux/interrupt.h>
32 #include <linux/input.h>
33 #include <linux/i2c.h>
34 #include <linux/uaccess.h>
35 #include <linux/delay.h>
36 #include <linux/debugfs.h>
37 #include <linux/slab.h>
38 #include <linux/gpio/consumer.h>
39 #include <linux/input/mt.h>
40 #include <linux/input/touchscreen.h>
42 #define MAX_SUPPORT_POINTS 5
44 #define WORK_REGISTER_THRESHOLD 0x00
45 #define WORK_REGISTER_REPORT_RATE 0x08
46 #define WORK_REGISTER_GAIN 0x30
47 #define WORK_REGISTER_OFFSET 0x31
48 #define WORK_REGISTER_NUM_X 0x33
49 #define WORK_REGISTER_NUM_Y 0x34
51 #define M09_REGISTER_THRESHOLD 0x80
52 #define M09_REGISTER_GAIN 0x92
53 #define M09_REGISTER_OFFSET 0x93
54 #define M09_REGISTER_NUM_X 0x94
55 #define M09_REGISTER_NUM_Y 0x95
57 #define NO_REGISTER 0xff
59 #define WORK_REGISTER_OPMODE 0x3c
60 #define FACTORY_REGISTER_OPMODE 0x01
62 #define TOUCH_EVENT_DOWN 0x00
63 #define TOUCH_EVENT_UP 0x01
64 #define TOUCH_EVENT_ON 0x02
65 #define TOUCH_EVENT_RESERVED 0x03
67 #define EDT_NAME_LEN 23
68 #define EDT_SWITCH_MODE_RETRIES 10
69 #define EDT_SWITCH_MODE_DELAY 5 /* msec */
70 #define EDT_RAW_DATA_RETRIES 100
71 #define EDT_RAW_DATA_DELAY 1 /* msec */
87 struct edt_ft5x06_ts_data {
88 struct i2c_client *client;
89 struct input_dev *input;
93 struct gpio_desc *reset_gpio;
94 struct gpio_desc *wake_gpio;
96 #if defined(CONFIG_DEBUG_FS)
97 struct dentry *debug_dir;
109 char name[EDT_NAME_LEN];
111 struct edt_reg_addr reg_addr;
112 enum edt_ver version;
115 static int edt_ft5x06_ts_readwrite(struct i2c_client *client,
116 u16 wr_len, u8 *wr_buf,
117 u16 rd_len, u8 *rd_buf)
119 struct i2c_msg wrmsg[2];
124 wrmsg[i].addr = client->addr;
126 wrmsg[i].len = wr_len;
127 wrmsg[i].buf = wr_buf;
131 wrmsg[i].addr = client->addr;
132 wrmsg[i].flags = I2C_M_RD;
133 wrmsg[i].len = rd_len;
134 wrmsg[i].buf = rd_buf;
138 ret = i2c_transfer(client->adapter, wrmsg, i);
147 static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata,
153 for (i = 0; i < buflen - 1; i++)
156 if (crc != buf[buflen-1]) {
157 dev_err_ratelimited(&tsdata->client->dev,
158 "crc error: 0x%02x expected, got 0x%02x\n",
166 static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
168 struct edt_ft5x06_ts_data *tsdata = dev_id;
169 struct device *dev = &tsdata->client->dev;
172 int i, type, x, y, id;
173 int offset, tplen, datalen;
176 switch (tsdata->version) {
178 cmd = 0xf9; /* tell the controller to send touch data */
179 offset = 5; /* where the actual touch data starts */
180 tplen = 4; /* data comes in so called frames */
181 datalen = 26; /* how much bytes to listen for */
195 memset(rdbuf, 0, sizeof(rdbuf));
197 error = edt_ft5x06_ts_readwrite(tsdata->client,
201 dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n",
206 /* M09 does not send header or CRC */
207 if (tsdata->version == M06) {
208 if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa ||
209 rdbuf[2] != datalen) {
210 dev_err_ratelimited(dev,
211 "Unexpected header: %02x%02x%02x!\n",
212 rdbuf[0], rdbuf[1], rdbuf[2]);
216 if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, datalen))
220 for (i = 0; i < MAX_SUPPORT_POINTS; i++) {
221 u8 *buf = &rdbuf[i * tplen + offset];
225 /* ignore Reserved events */
226 if (type == TOUCH_EVENT_RESERVED)
229 /* M06 sometimes sends bogus coordinates in TOUCH_DOWN */
230 if (tsdata->version == M06 && type == TOUCH_EVENT_DOWN)
233 x = ((buf[0] << 8) | buf[1]) & 0x0fff;
234 y = ((buf[2] << 8) | buf[3]) & 0x0fff;
235 id = (buf[2] >> 4) & 0x0f;
236 down = type != TOUCH_EVENT_UP;
238 input_mt_slot(tsdata->input, id);
239 input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, down);
244 input_report_abs(tsdata->input, ABS_MT_POSITION_X, x);
245 input_report_abs(tsdata->input, ABS_MT_POSITION_Y, y);
248 input_mt_report_pointer_emulation(tsdata->input, true);
249 input_sync(tsdata->input);
255 static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata,
260 switch (tsdata->version) {
262 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
263 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
265 wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2];
266 return edt_ft5x06_ts_readwrite(tsdata->client, 4,
272 return edt_ft5x06_ts_readwrite(tsdata->client, 2,
280 static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata,
283 u8 wrbuf[2], rdbuf[2];
286 switch (tsdata->version) {
288 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
289 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
290 wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
292 error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2,
297 if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) {
298 dev_err(&tsdata->client->dev,
299 "crc error: 0x%02x expected, got 0x%02x\n",
300 wrbuf[0] ^ wrbuf[1] ^ rdbuf[0],
308 error = edt_ft5x06_ts_readwrite(tsdata->client, 1,
321 struct edt_ft5x06_attribute {
322 struct device_attribute dattr;
330 #define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09, \
331 _limit_low, _limit_high) \
332 struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \
333 .dattr = __ATTR(_field, _mode, \
334 edt_ft5x06_setting_show, \
335 edt_ft5x06_setting_store), \
336 .field_offset = offsetof(struct edt_ft5x06_ts_data, _field), \
337 .addr_m06 = _addr_m06, \
338 .addr_m09 = _addr_m09, \
339 .limit_low = _limit_low, \
340 .limit_high = _limit_high, \
343 static ssize_t edt_ft5x06_setting_show(struct device *dev,
344 struct device_attribute *dattr,
347 struct i2c_client *client = to_i2c_client(dev);
348 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
349 struct edt_ft5x06_attribute *attr =
350 container_of(dattr, struct edt_ft5x06_attribute, dattr);
351 u8 *field = (u8 *)tsdata + attr->field_offset;
357 mutex_lock(&tsdata->mutex);
359 if (tsdata->factory_mode) {
364 switch (tsdata->version) {
366 addr = attr->addr_m06;
370 addr = attr->addr_m09;
378 if (addr != NO_REGISTER) {
379 val = edt_ft5x06_register_read(tsdata, addr);
382 dev_err(&tsdata->client->dev,
383 "Failed to fetch attribute %s, error %d\n",
384 dattr->attr.name, error);
392 dev_warn(&tsdata->client->dev,
393 "%s: read (%d) and stored value (%d) differ\n",
394 dattr->attr.name, val, *field);
398 count = scnprintf(buf, PAGE_SIZE, "%d\n", val);
400 mutex_unlock(&tsdata->mutex);
401 return error ?: count;
404 static ssize_t edt_ft5x06_setting_store(struct device *dev,
405 struct device_attribute *dattr,
406 const char *buf, size_t count)
408 struct i2c_client *client = to_i2c_client(dev);
409 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
410 struct edt_ft5x06_attribute *attr =
411 container_of(dattr, struct edt_ft5x06_attribute, dattr);
412 u8 *field = (u8 *)tsdata + attr->field_offset;
417 mutex_lock(&tsdata->mutex);
419 if (tsdata->factory_mode) {
424 error = kstrtouint(buf, 0, &val);
428 if (val < attr->limit_low || val > attr->limit_high) {
433 switch (tsdata->version) {
435 addr = attr->addr_m06;
439 addr = attr->addr_m09;
447 if (addr != NO_REGISTER) {
448 error = edt_ft5x06_register_write(tsdata, addr, val);
450 dev_err(&tsdata->client->dev,
451 "Failed to update attribute %s, error: %d\n",
452 dattr->attr.name, error);
459 mutex_unlock(&tsdata->mutex);
460 return error ?: count;
463 static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN,
464 M09_REGISTER_GAIN, 0, 31);
465 static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET,
466 M09_REGISTER_OFFSET, 0, 31);
467 static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD,
468 M09_REGISTER_THRESHOLD, 20, 80);
469 static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE,
472 static struct attribute *edt_ft5x06_attrs[] = {
473 &edt_ft5x06_attr_gain.dattr.attr,
474 &edt_ft5x06_attr_offset.dattr.attr,
475 &edt_ft5x06_attr_threshold.dattr.attr,
476 &edt_ft5x06_attr_report_rate.dattr.attr,
480 static const struct attribute_group edt_ft5x06_attr_group = {
481 .attrs = edt_ft5x06_attrs,
484 #ifdef CONFIG_DEBUG_FS
485 static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
487 struct i2c_client *client = tsdata->client;
488 int retries = EDT_SWITCH_MODE_RETRIES;
492 disable_irq(client->irq);
494 if (!tsdata->raw_buffer) {
495 tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y *
497 tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL);
498 if (!tsdata->raw_buffer) {
504 /* mode register is 0x3c when in the work mode */
505 if (tsdata->version == M09)
508 error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03);
510 dev_err(&client->dev,
511 "failed to switch to factory mode, error %d\n", error);
515 tsdata->factory_mode = true;
517 mdelay(EDT_SWITCH_MODE_DELAY);
518 /* mode register is 0x01 when in factory mode */
519 ret = edt_ft5x06_register_read(tsdata, FACTORY_REGISTER_OPMODE);
522 } while (--retries > 0);
525 dev_err(&client->dev, "not in factory mode after %dms.\n",
526 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
534 kfree(tsdata->raw_buffer);
535 tsdata->raw_buffer = NULL;
536 tsdata->factory_mode = false;
537 enable_irq(client->irq);
542 dev_err(&client->dev, "No factory mode support for M09\n");
547 static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata)
549 struct i2c_client *client = tsdata->client;
550 int retries = EDT_SWITCH_MODE_RETRIES;
551 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
555 /* mode register is 0x01 when in the factory mode */
556 error = edt_ft5x06_register_write(tsdata, FACTORY_REGISTER_OPMODE, 0x1);
558 dev_err(&client->dev,
559 "failed to switch to work mode, error: %d\n", error);
563 tsdata->factory_mode = false;
566 mdelay(EDT_SWITCH_MODE_DELAY);
567 /* mode register is 0x01 when in factory mode */
568 ret = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OPMODE);
571 } while (--retries > 0);
574 dev_err(&client->dev, "not in work mode after %dms.\n",
575 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
576 tsdata->factory_mode = true;
580 kfree(tsdata->raw_buffer);
581 tsdata->raw_buffer = NULL;
583 /* restore parameters */
584 edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold,
586 edt_ft5x06_register_write(tsdata, reg_addr->reg_gain,
588 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset,
590 if (reg_addr->reg_report_rate)
591 edt_ft5x06_register_write(tsdata, reg_addr->reg_report_rate,
592 tsdata->report_rate);
594 enable_irq(client->irq);
599 static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode)
601 struct edt_ft5x06_ts_data *tsdata = data;
603 *mode = tsdata->factory_mode;
608 static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode)
610 struct edt_ft5x06_ts_data *tsdata = data;
616 mutex_lock(&tsdata->mutex);
618 if (mode != tsdata->factory_mode) {
619 retval = mode ? edt_ft5x06_factory_mode(tsdata) :
620 edt_ft5x06_work_mode(tsdata);
623 mutex_unlock(&tsdata->mutex);
628 DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get,
629 edt_ft5x06_debugfs_mode_set, "%llu\n");
631 static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file,
632 char __user *buf, size_t count, loff_t *off)
634 struct edt_ft5x06_ts_data *tsdata = file->private_data;
635 struct i2c_client *client = tsdata->client;
636 int retries = EDT_RAW_DATA_RETRIES;
643 if (*off < 0 || *off >= tsdata->raw_bufsize)
646 mutex_lock(&tsdata->mutex);
648 if (!tsdata->factory_mode || !tsdata->raw_buffer) {
653 error = edt_ft5x06_register_write(tsdata, 0x08, 0x01);
655 dev_dbg(&client->dev,
656 "failed to write 0x08 register, error %d\n", error);
661 msleep(EDT_RAW_DATA_DELAY);
662 val = edt_ft5x06_register_read(tsdata, 0x08);
665 } while (--retries > 0);
669 dev_dbg(&client->dev,
670 "failed to read 0x08 register, error %d\n", error);
675 dev_dbg(&client->dev,
676 "timed out waiting for register to settle\n");
681 rdbuf = tsdata->raw_buffer;
682 colbytes = tsdata->num_y * sizeof(u16);
686 for (i = 0; i < tsdata->num_x; i++) {
687 wrbuf[2] = i; /* column index */
688 error = edt_ft5x06_ts_readwrite(tsdata->client,
689 sizeof(wrbuf), wrbuf,
697 read = min_t(size_t, count, tsdata->raw_bufsize - *off);
698 if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) {
705 mutex_unlock(&tsdata->mutex);
706 return error ?: read;
709 static const struct file_operations debugfs_raw_data_fops = {
711 .read = edt_ft5x06_debugfs_raw_data_read,
715 edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
716 const char *debugfs_name)
718 tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL);
719 if (!tsdata->debug_dir)
722 debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x);
723 debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y);
725 debugfs_create_file("mode", S_IRUSR | S_IWUSR,
726 tsdata->debug_dir, tsdata, &debugfs_mode_fops);
727 debugfs_create_file("raw_data", S_IRUSR,
728 tsdata->debug_dir, tsdata, &debugfs_raw_data_fops);
732 edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
734 debugfs_remove_recursive(tsdata->debug_dir);
735 kfree(tsdata->raw_buffer);
741 edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
742 const char *debugfs_name)
747 edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
751 #endif /* CONFIG_DEBUGFS */
753 static int edt_ft5x06_ts_identify(struct i2c_client *client,
754 struct edt_ft5x06_ts_data *tsdata,
757 u8 rdbuf[EDT_NAME_LEN];
760 char *model_name = tsdata->name;
762 /* see what we find if we assume it is a M06 *
763 * if we get less than EDT_NAME_LEN, we don't want
764 * to have garbage in there
766 memset(rdbuf, 0, sizeof(rdbuf));
767 error = edt_ft5x06_ts_readwrite(client, 1, "\xbb",
768 EDT_NAME_LEN - 1, rdbuf);
772 /* if we find something consistent, stay with that assumption
773 * at least M09 won't send 3 bytes here
775 if (!(strncasecmp(rdbuf + 1, "EP0", 3))) {
776 tsdata->version = M06;
778 /* remove last '$' end marker */
779 rdbuf[EDT_NAME_LEN - 1] = '\0';
780 if (rdbuf[EDT_NAME_LEN - 2] == '$')
781 rdbuf[EDT_NAME_LEN - 2] = '\0';
783 /* look for Model/Version separator */
784 p = strchr(rdbuf, '*');
787 strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN);
788 strlcpy(fw_version, p ? p : "", EDT_NAME_LEN);
790 /* since there are only two versions around (M06, M09) */
791 tsdata->version = M09;
793 error = edt_ft5x06_ts_readwrite(client, 1, "\xA6",
798 strlcpy(fw_version, rdbuf, 2);
800 error = edt_ft5x06_ts_readwrite(client, 1, "\xA8",
805 snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09",
806 rdbuf[0] >> 4, rdbuf[0] & 0x0F);
812 static void edt_ft5x06_ts_get_defaults(struct device *dev,
813 struct edt_ft5x06_ts_data *tsdata)
815 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
819 error = device_property_read_u32(dev, "threshold", &val);
821 reg_addr->reg_threshold = val;
823 error = device_property_read_u32(dev, "gain", &val);
825 reg_addr->reg_gain = val;
827 error = device_property_read_u32(dev, "offset", &val);
829 reg_addr->reg_offset = val;
833 edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata)
835 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
837 tsdata->threshold = edt_ft5x06_register_read(tsdata,
838 reg_addr->reg_threshold);
839 tsdata->gain = edt_ft5x06_register_read(tsdata, reg_addr->reg_gain);
840 tsdata->offset = edt_ft5x06_register_read(tsdata, reg_addr->reg_offset);
841 if (reg_addr->reg_report_rate != NO_REGISTER)
842 tsdata->report_rate = edt_ft5x06_register_read(tsdata,
843 reg_addr->reg_report_rate);
844 tsdata->num_x = edt_ft5x06_register_read(tsdata, reg_addr->reg_num_x);
845 tsdata->num_y = edt_ft5x06_register_read(tsdata, reg_addr->reg_num_y);
849 edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
851 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
853 switch (tsdata->version) {
855 reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD;
856 reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE;
857 reg_addr->reg_gain = WORK_REGISTER_GAIN;
858 reg_addr->reg_offset = WORK_REGISTER_OFFSET;
859 reg_addr->reg_num_x = WORK_REGISTER_NUM_X;
860 reg_addr->reg_num_y = WORK_REGISTER_NUM_Y;
864 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
865 reg_addr->reg_gain = M09_REGISTER_GAIN;
866 reg_addr->reg_offset = M09_REGISTER_OFFSET;
867 reg_addr->reg_num_x = M09_REGISTER_NUM_X;
868 reg_addr->reg_num_y = M09_REGISTER_NUM_Y;
873 static int edt_ft5x06_ts_probe(struct i2c_client *client,
874 const struct i2c_device_id *id)
876 struct edt_ft5x06_ts_data *tsdata;
877 struct input_dev *input;
878 unsigned long irq_flags;
880 char fw_version[EDT_NAME_LEN];
882 dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
884 tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
886 dev_err(&client->dev, "failed to allocate driver data.\n");
890 tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev,
891 "reset", GPIOD_OUT_HIGH);
892 if (IS_ERR(tsdata->reset_gpio)) {
893 error = PTR_ERR(tsdata->reset_gpio);
894 dev_err(&client->dev,
895 "Failed to request GPIO reset pin, error %d\n", error);
899 tsdata->wake_gpio = devm_gpiod_get_optional(&client->dev,
900 "wake", GPIOD_OUT_LOW);
901 if (IS_ERR(tsdata->wake_gpio)) {
902 error = PTR_ERR(tsdata->wake_gpio);
903 dev_err(&client->dev,
904 "Failed to request GPIO wake pin, error %d\n", error);
908 if (tsdata->wake_gpio) {
909 usleep_range(5000, 6000);
910 gpiod_set_value_cansleep(tsdata->wake_gpio, 1);
913 if (tsdata->reset_gpio) {
914 usleep_range(5000, 6000);
915 gpiod_set_value_cansleep(tsdata->reset_gpio, 0);
919 input = devm_input_allocate_device(&client->dev);
921 dev_err(&client->dev, "failed to allocate input device.\n");
925 mutex_init(&tsdata->mutex);
926 tsdata->client = client;
927 tsdata->input = input;
928 tsdata->factory_mode = false;
930 error = edt_ft5x06_ts_identify(client, tsdata, fw_version);
932 dev_err(&client->dev, "touchscreen probe failed\n");
936 edt_ft5x06_ts_set_regs(tsdata);
937 edt_ft5x06_ts_get_defaults(&client->dev, tsdata);
938 edt_ft5x06_ts_get_parameters(tsdata);
940 dev_dbg(&client->dev,
941 "Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
942 tsdata->name, fw_version, tsdata->num_x, tsdata->num_y);
944 input->name = tsdata->name;
945 input->id.bustype = BUS_I2C;
946 input->dev.parent = &client->dev;
948 input_set_abs_params(input, ABS_MT_POSITION_X,
949 0, tsdata->num_x * 64 - 1, 0, 0);
950 input_set_abs_params(input, ABS_MT_POSITION_Y,
951 0, tsdata->num_y * 64 - 1, 0, 0);
953 touchscreen_parse_properties(input, true);
955 error = input_mt_init_slots(input, MAX_SUPPORT_POINTS, INPUT_MT_DIRECT);
957 dev_err(&client->dev, "Unable to init MT slots.\n");
961 input_set_drvdata(input, tsdata);
962 i2c_set_clientdata(client, tsdata);
964 irq_flags = irq_get_trigger_type(client->irq);
965 if (irq_flags == IRQF_TRIGGER_NONE)
966 irq_flags = IRQF_TRIGGER_FALLING;
967 irq_flags |= IRQF_ONESHOT;
969 error = devm_request_threaded_irq(&client->dev, client->irq,
970 NULL, edt_ft5x06_ts_isr, irq_flags,
971 client->name, tsdata);
973 dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
977 error = sysfs_create_group(&client->dev.kobj, &edt_ft5x06_attr_group);
981 error = input_register_device(input);
983 goto err_remove_attrs;
985 edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
986 device_init_wakeup(&client->dev, 1);
988 dev_dbg(&client->dev,
989 "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n",
990 client->irq, desc_to_gpio(tsdata->wake_gpio),
991 desc_to_gpio(tsdata->reset_gpio));
996 sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
1000 static int edt_ft5x06_ts_remove(struct i2c_client *client)
1002 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
1004 edt_ft5x06_ts_teardown_debugfs(tsdata);
1005 sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
1010 static int __maybe_unused edt_ft5x06_ts_suspend(struct device *dev)
1012 struct i2c_client *client = to_i2c_client(dev);
1014 if (device_may_wakeup(dev))
1015 enable_irq_wake(client->irq);
1020 static int __maybe_unused edt_ft5x06_ts_resume(struct device *dev)
1022 struct i2c_client *client = to_i2c_client(dev);
1024 if (device_may_wakeup(dev))
1025 disable_irq_wake(client->irq);
1030 static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops,
1031 edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume);
1033 static const struct i2c_device_id edt_ft5x06_ts_id[] = {
1034 { "edt-ft5x06", 0, },
1037 MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id);
1040 static const struct of_device_id edt_ft5x06_of_match[] = {
1041 { .compatible = "edt,edt-ft5206", },
1042 { .compatible = "edt,edt-ft5306", },
1043 { .compatible = "edt,edt-ft5406", },
1046 MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match);
1049 static struct i2c_driver edt_ft5x06_ts_driver = {
1051 .name = "edt_ft5x06",
1052 .of_match_table = of_match_ptr(edt_ft5x06_of_match),
1053 .pm = &edt_ft5x06_ts_pm_ops,
1055 .id_table = edt_ft5x06_ts_id,
1056 .probe = edt_ft5x06_ts_probe,
1057 .remove = edt_ft5x06_ts_remove,
1060 module_i2c_driver(edt_ft5x06_ts_driver);
1062 MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>");
1063 MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver");
1064 MODULE_LICENSE("GPL");