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2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 kernel/drivers/input/touchscreen/edt-ft5x06.c
....@@ -1,20 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0
12 /*
23  * Copyright (C) 2012 Simon Budig, <simon.budig@kernelconcepts.de>
34  * Daniel Wagener <daniel.wagener@kernelconcepts.de> (M09 firmware support)
45  * Lothar Waßmann <LW@KARO-electronics.de> (DT support)
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
186  */
197 
208 /*
....@@ -25,20 +13,23 @@
2513  *    http://www.glyn.com/Products/Displays
2614  */
2715 
28
-#include <linux/module.h>
29
-#include <linux/ratelimit.h>
30
-#include <linux/irq.h>
16
+#include <linux/debugfs.h>
17
+#include <linux/delay.h>
18
+#include <linux/gpio/consumer.h>
19
+#include <linux/i2c.h>
3120 #include <linux/interrupt.h>
3221 #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>
3922 #include <linux/input/mt.h>
4023 #include <linux/input/touchscreen.h>
41
-#include <linux/of_device.h>
24
+#include <linux/irq.h>
25
+#include <linux/kernel.h>
26
+#include <linux/module.h>
27
+#include <linux/ratelimit.h>
28
+#include <linux/regulator/consumer.h>
29
+#include <linux/slab.h>
30
+#include <linux/uaccess.h>
31
+
32
+#include <asm/unaligned.h>
4233 
4334 #define WORK_REGISTER_THRESHOLD		0x00
4435 #define WORK_REGISTER_REPORT_RATE	0x08
....@@ -47,16 +38,25 @@
4738 #define WORK_REGISTER_NUM_X		0x33
4839 #define WORK_REGISTER_NUM_Y		0x34
4940 
41
+#define PMOD_REGISTER_ACTIVE		0x00
42
+#define PMOD_REGISTER_HIBERNATE		0x03
43
+
5044 #define M09_REGISTER_THRESHOLD		0x80
5145 #define M09_REGISTER_GAIN		0x92
5246 #define M09_REGISTER_OFFSET		0x93
5347 #define M09_REGISTER_NUM_X		0x94
5448 #define M09_REGISTER_NUM_Y		0x95
5549 
50
+#define EV_REGISTER_THRESHOLD		0x40
51
+#define EV_REGISTER_GAIN		0x41
52
+#define EV_REGISTER_OFFSET_Y		0x45
53
+#define EV_REGISTER_OFFSET_X		0x46
54
+
5655 #define NO_REGISTER			0xff
5756 
5857 #define WORK_REGISTER_OPMODE		0x3c
5958 #define FACTORY_REGISTER_OPMODE		0x01
59
+#define PMOD_REGISTER_OPMODE		0xa5
6060 
6161 #define TOUCH_EVENT_DOWN		0x00
6262 #define TOUCH_EVENT_UP			0x01
....@@ -69,10 +69,17 @@
6969 #define EDT_RAW_DATA_RETRIES		100
7070 #define EDT_RAW_DATA_DELAY		1000 /* usec */
7171 
72
+enum edt_pmode {
73
+	EDT_PMODE_NOT_SUPPORTED,
74
+	EDT_PMODE_HIBERNATE,
75
+	EDT_PMODE_POWEROFF,
76
+};
77
+
7278 enum edt_ver {
7379 	EDT_M06,
7480 	EDT_M09,
7581 	EDT_M12,
82
+	EV_FT,
7683 	GENERIC_FT,
7784 };
7885 
....@@ -81,6 +88,8 @@
8188 	int reg_report_rate;
8289 	int reg_gain;
8390 	int reg_offset;
91
+	int reg_offset_x;
92
+	int reg_offset_y;
8493 	int reg_num_x;
8594 	int reg_num_y;
8695 };
....@@ -91,6 +100,7 @@
91100 	struct touchscreen_properties prop;
92101 	u16 num_x;
93102 	u16 num_y;
103
+	struct regulator *vcc;
94104 
95105 	struct gpio_desc *reset_gpio;
96106 	struct gpio_desc *wake_gpio;
....@@ -103,9 +113,12 @@
103113 
104114 	struct mutex mutex;
105115 	bool factory_mode;
116
+	enum edt_pmode suspend_mode;
106117 	int threshold;
107118 	int gain;
108119 	int offset;
120
+	int offset_x;
121
+	int offset_y;
109122 	int report_rate;
110123 	int max_support_points;
111124 
....@@ -190,6 +203,7 @@
190203 
191204 	case EDT_M09:
192205 	case EDT_M12:
206
+	case EV_FT:
193207 	case GENERIC_FT:
194208 		cmd = 0x0;
195209 		offset = 3;
....@@ -229,7 +243,6 @@
229243 
230244 	for (i = 0; i < tsdata->max_support_points; i++) {
231245 		u8 *buf = &rdbuf[i * tplen + offset];
232
-		bool down;
233246 
234247 		type = buf[0] >> 6;
235248 		/* ignore Reserved events */
....@@ -240,19 +253,19 @@
240253 		if (tsdata->version == EDT_M06 && type == TOUCH_EVENT_DOWN)
241254 			continue;
242255 
243
-		x = ((buf[0] << 8) | buf[1]) & 0x0fff;
244
-		y = ((buf[2] << 8) | buf[3]) & 0x0fff;
256
+		x = get_unaligned_be16(buf) & 0x0fff;
257
+		y = get_unaligned_be16(buf + 2) & 0x0fff;
258
+		/* The FT5x26 send the y coordinate first */
259
+		if (tsdata->version == EV_FT)
260
+			swap(x, y);
261
+
245262 		id = (buf[2] >> 4) & 0x0f;
246
-		down = type != TOUCH_EVENT_UP;
247263 
248264 		input_mt_slot(tsdata->input, id);
249
-		input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, down);
250
-
251
-		if (!down)
252
-			continue;
253
-
254
-		touchscreen_report_pos(tsdata->input, &tsdata->prop, x, y,
255
-				       true);
265
+		if (input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER,
266
+					       type != TOUCH_EVENT_UP))
267
+			touchscreen_report_pos(tsdata->input, &tsdata->prop,
268
+					       x, y, true);
256269 	}
257270 
258271 	input_mt_report_pointer_emulation(tsdata->input, true);
....@@ -275,8 +288,10 @@
275288 		wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2];
276289 		return edt_ft5x06_ts_readwrite(tsdata->client, 4,
277290 					wrbuf, 0, NULL);
291
+
278292 	case EDT_M09:
279293 	case EDT_M12:
294
+	case EV_FT:
280295 	case GENERIC_FT:
281296 		wrbuf[0] = addr;
282297 		wrbuf[1] = value;
....@@ -317,6 +332,7 @@
317332 
318333 	case EDT_M09:
319334 	case EDT_M12:
335
+	case EV_FT:
320336 	case GENERIC_FT:
321337 		wrbuf[0] = addr;
322338 		error = edt_ft5x06_ts_readwrite(tsdata->client, 1,
....@@ -339,9 +355,10 @@
339355 	u8 limit_high;
340356 	u8 addr_m06;
341357 	u8 addr_m09;
358
+	u8 addr_ev;
342359 };
343360 
344
-#define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09,			\
361
+#define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09, _addr_ev,		\
345362 		_limit_low, _limit_high)				\
346363 	struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = {	\
347364 		.dattr = __ATTR(_field, _mode,				\
....@@ -350,6 +367,7 @@
350367 		.field_offset = offsetof(struct edt_ft5x06_ts_data, _field), \
351368 		.addr_m06 = _addr_m06,					\
352369 		.addr_m09 = _addr_m09,					\
370
+		.addr_ev  = _addr_ev,					\
353371 		.limit_low = _limit_low,				\
354372 		.limit_high = _limit_high,				\
355373 	}
....@@ -384,6 +402,10 @@
384402 	case EDT_M12:
385403 	case GENERIC_FT:
386404 		addr = attr->addr_m09;
405
+		break;
406
+
407
+	case EV_FT:
408
+		addr = attr->addr_ev;
387409 		break;
388410 
389411 	default:
....@@ -457,6 +479,10 @@
457479 		addr = attr->addr_m09;
458480 		break;
459481 
482
+	case EV_FT:
483
+		addr = attr->addr_ev;
484
+		break;
485
+
460486 	default:
461487 		error = -ENODEV;
462488 		goto out;
....@@ -480,20 +506,28 @@
480506 
481507 /* m06, m09: range 0-31, m12: range 0-5 */
482508 static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN,
483
-		M09_REGISTER_GAIN, 0, 31);
509
+		M09_REGISTER_GAIN, EV_REGISTER_GAIN, 0, 31);
484510 /* m06, m09: range 0-31, m12: range 0-16 */
485511 static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET,
486
-		M09_REGISTER_OFFSET, 0, 31);
512
+		M09_REGISTER_OFFSET, NO_REGISTER, 0, 31);
513
+/* m06, m09, m12: no supported, ev_ft: range 0-80 */
514
+static EDT_ATTR(offset_x, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER,
515
+		EV_REGISTER_OFFSET_X, 0, 80);
516
+/* m06, m09, m12: no supported, ev_ft: range 0-80 */
517
+static EDT_ATTR(offset_y, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER,
518
+		EV_REGISTER_OFFSET_Y, 0, 80);
487519 /* m06: range 20 to 80, m09: range 0 to 30, m12: range 1 to 255... */
488520 static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD,
489
-		M09_REGISTER_THRESHOLD, 0, 255);
521
+		M09_REGISTER_THRESHOLD, EV_REGISTER_THRESHOLD, 0, 255);
490522 /* m06: range 3 to 14, m12: (0x64: 100Hz) */
491523 static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE,
492
-		NO_REGISTER, 0, 255);
524
+		NO_REGISTER, NO_REGISTER, 0, 255);
493525 
494526 static struct attribute *edt_ft5x06_attrs[] = {
495527 	&edt_ft5x06_attr_gain.dattr.attr,
496528 	&edt_ft5x06_attr_offset.dattr.attr,
529
+	&edt_ft5x06_attr_offset_x.dattr.attr,
530
+	&edt_ft5x06_attr_offset_y.dattr.attr,
497531 	&edt_ft5x06_attr_threshold.dattr.attr,
498532 	&edt_ft5x06_attr_report_rate.dattr.attr,
499533 	NULL
....@@ -502,6 +536,29 @@
502536 static const struct attribute_group edt_ft5x06_attr_group = {
503537 	.attrs = edt_ft5x06_attrs,
504538 };
539
+
540
+static void edt_ft5x06_restore_reg_parameters(struct edt_ft5x06_ts_data *tsdata)
541
+{
542
+	struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
543
+
544
+	edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold,
545
+				  tsdata->threshold);
546
+	edt_ft5x06_register_write(tsdata, reg_addr->reg_gain,
547
+				  tsdata->gain);
548
+	if (reg_addr->reg_offset != NO_REGISTER)
549
+		edt_ft5x06_register_write(tsdata, reg_addr->reg_offset,
550
+					  tsdata->offset);
551
+	if (reg_addr->reg_offset_x != NO_REGISTER)
552
+		edt_ft5x06_register_write(tsdata, reg_addr->reg_offset_x,
553
+					  tsdata->offset_x);
554
+	if (reg_addr->reg_offset_y != NO_REGISTER)
555
+		edt_ft5x06_register_write(tsdata, reg_addr->reg_offset_y,
556
+					  tsdata->offset_y);
557
+	if (reg_addr->reg_report_rate != NO_REGISTER)
558
+		edt_ft5x06_register_write(tsdata, reg_addr->reg_report_rate,
559
+				  tsdata->report_rate);
560
+
561
+}
505562 
506563 #ifdef CONFIG_DEBUG_FS
507564 static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
....@@ -568,7 +625,6 @@
568625 {
569626 	struct i2c_client *client = tsdata->client;
570627 	int retries = EDT_SWITCH_MODE_RETRIES;
571
-	struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
572628 	int ret;
573629 	int error;
574630 
....@@ -600,17 +656,7 @@
600656 	kfree(tsdata->raw_buffer);
601657 	tsdata->raw_buffer = NULL;
602658 
603
-	/* restore parameters */
604
-	edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold,
605
-				  tsdata->threshold);
606
-	edt_ft5x06_register_write(tsdata, reg_addr->reg_gain,
607
-				  tsdata->gain);
608
-	edt_ft5x06_register_write(tsdata, reg_addr->reg_offset,
609
-				  tsdata->offset);
610
-	if (reg_addr->reg_report_rate != NO_REGISTER)
611
-		edt_ft5x06_register_write(tsdata, reg_addr->reg_report_rate,
612
-				  tsdata->report_rate);
613
-
659
+	edt_ft5x06_restore_reg_parameters(tsdata);
614660 	enable_irq(client->irq);
615661 
616662 	return 0;
....@@ -731,13 +777,10 @@
731777 	.read = edt_ft5x06_debugfs_raw_data_read,
732778 };
733779 
734
-static void
735
-edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
736
-			      const char *debugfs_name)
780
+static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
781
+					  const char *debugfs_name)
737782 {
738783 	tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL);
739
-	if (!tsdata->debug_dir)
740
-		return;
741784 
742785 	debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x);
743786 	debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y);
....@@ -748,8 +791,7 @@
748791 			    tsdata->debug_dir, tsdata, &debugfs_raw_data_fops);
749792 }
750793 
751
-static void
752
-edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
794
+static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
753795 {
754796 	debugfs_remove_recursive(tsdata->debug_dir);
755797 	kfree(tsdata->raw_buffer);
....@@ -757,14 +799,17 @@
757799 
758800 #else
759801 
760
-static inline void
761
-edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
762
-			      const char *debugfs_name)
802
+static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
803
+{
804
+	return -ENOSYS;
805
+}
806
+
807
+static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
808
+					  const char *debugfs_name)
763809 {
764810 }
765811 
766
-static inline void
767
-edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
812
+static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
768813 {
769814 }
770815 
....@@ -867,6 +912,16 @@
867912 		case 0x5a:   /* Solomon Goldentek Display */
868913 			snprintf(model_name, EDT_NAME_LEN, "GKTW50SCED1R0");
869914 			break;
915
+		case 0x59:  /* Evervision Display with FT5xx6 TS */
916
+			tsdata->version = EV_FT;
917
+			error = edt_ft5x06_ts_readwrite(client, 1, "\x53",
918
+							1, rdbuf);
919
+			if (error)
920
+				return error;
921
+			strlcpy(fw_version, rdbuf, 1);
922
+			snprintf(model_name, EDT_NAME_LEN,
923
+				 "EVERVISION-FT5726NEi");
924
+			break;
870925 		default:
871926 			snprintf(model_name, EDT_NAME_LEN,
872927 				 "generic ft5x06 (%02x)",
....@@ -899,8 +954,26 @@
899954 
900955 	error = device_property_read_u32(dev, "offset", &val);
901956 	if (!error) {
902
-		edt_ft5x06_register_write(tsdata, reg_addr->reg_offset, val);
957
+		if (reg_addr->reg_offset != NO_REGISTER)
958
+			edt_ft5x06_register_write(tsdata,
959
+						  reg_addr->reg_offset, val);
903960 		tsdata->offset = val;
961
+	}
962
+
963
+	error = device_property_read_u32(dev, "offset-x", &val);
964
+	if (!error) {
965
+		if (reg_addr->reg_offset_x != NO_REGISTER)
966
+			edt_ft5x06_register_write(tsdata,
967
+						  reg_addr->reg_offset_x, val);
968
+		tsdata->offset_x = val;
969
+	}
970
+
971
+	error = device_property_read_u32(dev, "offset-y", &val);
972
+	if (!error) {
973
+		if (reg_addr->reg_offset_y != NO_REGISTER)
974
+			edt_ft5x06_register_write(tsdata,
975
+						  reg_addr->reg_offset_y, val);
976
+		tsdata->offset_y = val;
904977 	}
905978 }
906979 
....@@ -912,7 +985,15 @@
912985 	tsdata->threshold = edt_ft5x06_register_read(tsdata,
913986 						     reg_addr->reg_threshold);
914987 	tsdata->gain = edt_ft5x06_register_read(tsdata, reg_addr->reg_gain);
915
-	tsdata->offset = edt_ft5x06_register_read(tsdata, reg_addr->reg_offset);
988
+	if (reg_addr->reg_offset != NO_REGISTER)
989
+		tsdata->offset =
990
+			edt_ft5x06_register_read(tsdata, reg_addr->reg_offset);
991
+	if (reg_addr->reg_offset_x != NO_REGISTER)
992
+		tsdata->offset_x = edt_ft5x06_register_read(tsdata,
993
+						reg_addr->reg_offset_x);
994
+	if (reg_addr->reg_offset_y != NO_REGISTER)
995
+		tsdata->offset_y = edt_ft5x06_register_read(tsdata,
996
+						reg_addr->reg_offset_y);
916997 	if (reg_addr->reg_report_rate != NO_REGISTER)
917998 		tsdata->report_rate = edt_ft5x06_register_read(tsdata,
918999 						reg_addr->reg_report_rate);
....@@ -940,6 +1021,8 @@
9401021 		reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE;
9411022 		reg_addr->reg_gain = WORK_REGISTER_GAIN;
9421023 		reg_addr->reg_offset = WORK_REGISTER_OFFSET;
1024
+		reg_addr->reg_offset_x = NO_REGISTER;
1025
+		reg_addr->reg_offset_y = NO_REGISTER;
9431026 		reg_addr->reg_num_x = WORK_REGISTER_NUM_X;
9441027 		reg_addr->reg_num_y = WORK_REGISTER_NUM_Y;
9451028 		break;
....@@ -950,8 +1033,21 @@
9501033 		reg_addr->reg_report_rate = NO_REGISTER;
9511034 		reg_addr->reg_gain = M09_REGISTER_GAIN;
9521035 		reg_addr->reg_offset = M09_REGISTER_OFFSET;
1036
+		reg_addr->reg_offset_x = NO_REGISTER;
1037
+		reg_addr->reg_offset_y = NO_REGISTER;
9531038 		reg_addr->reg_num_x = M09_REGISTER_NUM_X;
9541039 		reg_addr->reg_num_y = M09_REGISTER_NUM_Y;
1040
+		break;
1041
+
1042
+	case EV_FT:
1043
+		reg_addr->reg_threshold = EV_REGISTER_THRESHOLD;
1044
+		reg_addr->reg_gain = EV_REGISTER_GAIN;
1045
+		reg_addr->reg_offset = NO_REGISTER;
1046
+		reg_addr->reg_offset_x = EV_REGISTER_OFFSET_X;
1047
+		reg_addr->reg_offset_y = EV_REGISTER_OFFSET_Y;
1048
+		reg_addr->reg_num_x = NO_REGISTER;
1049
+		reg_addr->reg_num_y = NO_REGISTER;
1050
+		reg_addr->reg_report_rate = NO_REGISTER;
9551051 		break;
9561052 
9571053 	case GENERIC_FT:
....@@ -959,8 +1055,17 @@
9591055 		reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
9601056 		reg_addr->reg_gain = M09_REGISTER_GAIN;
9611057 		reg_addr->reg_offset = M09_REGISTER_OFFSET;
1058
+		reg_addr->reg_offset_x = NO_REGISTER;
1059
+		reg_addr->reg_offset_y = NO_REGISTER;
9621060 		break;
9631061 	}
1062
+}
1063
+
1064
+static void edt_ft5x06_disable_regulator(void *arg)
1065
+{
1066
+	struct edt_ft5x06_ts_data *data = arg;
1067
+
1068
+	regulator_disable(data->vcc);
9641069 }
9651070 
9661071 static int edt_ft5x06_ts_probe(struct i2c_client *client,
....@@ -982,7 +1087,7 @@
9821087 		return -ENOMEM;
9831088 	}
9841089 
985
-	chip_data = of_device_get_match_data(&client->dev);
1090
+	chip_data = device_get_match_data(&client->dev);
9861091 	if (!chip_data)
9871092 		chip_data = (const struct edt_i2c_chip_data *)id->driver_data;
9881093 	if (!chip_data || !chip_data->max_support_points) {
....@@ -991,6 +1096,27 @@
9911096 	}
9921097 
9931098 	tsdata->max_support_points = chip_data->max_support_points;
1099
+
1100
+	tsdata->vcc = devm_regulator_get(&client->dev, "vcc");
1101
+	if (IS_ERR(tsdata->vcc)) {
1102
+		error = PTR_ERR(tsdata->vcc);
1103
+		if (error != -EPROBE_DEFER)
1104
+			dev_err(&client->dev,
1105
+				"failed to request regulator: %d\n", error);
1106
+		return error;
1107
+	}
1108
+
1109
+	error = regulator_enable(tsdata->vcc);
1110
+	if (error < 0) {
1111
+		dev_err(&client->dev, "failed to enable vcc: %d\n", error);
1112
+		return error;
1113
+	}
1114
+
1115
+	error = devm_add_action_or_reset(&client->dev,
1116
+					 edt_ft5x06_disable_regulator,
1117
+					 tsdata);
1118
+	if (error)
1119
+		return error;
9941120 
9951121 	tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev,
9961122 						     "reset", GPIOD_OUT_HIGH);
....@@ -1009,6 +1135,19 @@
10091135 			"Failed to request GPIO wake pin, error %d\n", error);
10101136 		return error;
10111137 	}
1138
+
1139
+	/*
1140
+	 * Check which sleep modes we can support. Power-off requieres the
1141
+	 * reset-pin to ensure correct power-down/power-up behaviour. Start with
1142
+	 * the EDT_PMODE_POWEROFF test since this is the deepest possible sleep
1143
+	 * mode.
1144
+	 */
1145
+	if (tsdata->reset_gpio)
1146
+		tsdata->suspend_mode = EDT_PMODE_POWEROFF;
1147
+	else if (tsdata->wake_gpio)
1148
+		tsdata->suspend_mode = EDT_PMODE_HIBERNATE;
1149
+	else
1150
+		tsdata->suspend_mode = EDT_PMODE_NOT_SUPPORTED;
10121151 
10131152 	if (tsdata->wake_gpio) {
10141153 		usleep_range(5000, 6000);
....@@ -1104,7 +1243,6 @@
11041243 		return error;
11051244 
11061245 	edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
1107
-	device_init_wakeup(&client->dev, 1);
11081246 
11091247 	dev_dbg(&client->dev,
11101248 		"EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n",
....@@ -1127,9 +1265,39 @@
11271265 static int __maybe_unused edt_ft5x06_ts_suspend(struct device *dev)
11281266 {
11291267 	struct i2c_client *client = to_i2c_client(dev);
1268
+	struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
1269
+	struct gpio_desc *reset_gpio = tsdata->reset_gpio;
1270
+	int ret;
11301271 
11311272 	if (device_may_wakeup(dev))
1132
-		enable_irq_wake(client->irq);
1273
+		return 0;
1274
+
1275
+	if (tsdata->suspend_mode == EDT_PMODE_NOT_SUPPORTED)
1276
+		return 0;
1277
+
1278
+	/* Enter hibernate mode. */
1279
+	ret = edt_ft5x06_register_write(tsdata, PMOD_REGISTER_OPMODE,
1280
+					PMOD_REGISTER_HIBERNATE);
1281
+	if (ret)
1282
+		dev_warn(dev, "Failed to set hibernate mode\n");
1283
+
1284
+	if (tsdata->suspend_mode == EDT_PMODE_HIBERNATE)
1285
+		return 0;
1286
+
1287
+	/*
1288
+	 * Power-off according the datasheet. Cut the power may leaf the irq
1289
+	 * line in an undefined state depending on the host pull resistor
1290
+	 * settings. Disable the irq to avoid adjusting each host till the
1291
+	 * device is back in a full functional state.
1292
+	 */
1293
+	disable_irq(tsdata->client->irq);
1294
+
1295
+	gpiod_set_value_cansleep(reset_gpio, 1);
1296
+	usleep_range(1000, 2000);
1297
+
1298
+	ret = regulator_disable(tsdata->vcc);
1299
+	if (ret)
1300
+		dev_warn(dev, "Failed to disable vcc\n");
11331301 
11341302 	return 0;
11351303 }
....@@ -1137,11 +1305,54 @@
11371305 static int __maybe_unused edt_ft5x06_ts_resume(struct device *dev)
11381306 {
11391307 	struct i2c_client *client = to_i2c_client(dev);
1308
+	struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
1309
+	int ret = 0;
11401310 
11411311 	if (device_may_wakeup(dev))
1142
-		disable_irq_wake(client->irq);
1312
+		return 0;
11431313 
1144
-	return 0;
1314
+	if (tsdata->suspend_mode == EDT_PMODE_NOT_SUPPORTED)
1315
+		return 0;
1316
+
1317
+	if (tsdata->suspend_mode == EDT_PMODE_POWEROFF) {
1318
+		struct gpio_desc *reset_gpio = tsdata->reset_gpio;
1319
+
1320
+		/*
1321
+		 * We can't check if the regulator is a dummy or a real
1322
+		 * regulator. So we need to specify the 5ms reset time (T_rst)
1323
+		 * here instead of the 100us T_rtp time. We also need to wait
1324
+		 * 300ms in case it was a real supply and the power was cutted
1325
+		 * of. Toggle the reset pin is also a way to exit the hibernate
1326
+		 * mode.
1327
+		 */
1328
+		gpiod_set_value_cansleep(reset_gpio, 1);
1329
+		usleep_range(5000, 6000);
1330
+
1331
+		ret = regulator_enable(tsdata->vcc);
1332
+		if (ret) {
1333
+			dev_err(dev, "Failed to enable vcc\n");
1334
+			return ret;
1335
+		}
1336
+
1337
+		usleep_range(1000, 2000);
1338
+		gpiod_set_value_cansleep(reset_gpio, 0);
1339
+		msleep(300);
1340
+
1341
+		edt_ft5x06_restore_reg_parameters(tsdata);
1342
+		enable_irq(tsdata->client->irq);
1343
+
1344
+		if (tsdata->factory_mode)
1345
+			ret = edt_ft5x06_factory_mode(tsdata);
1346
+	} else {
1347
+		struct gpio_desc *wake_gpio = tsdata->wake_gpio;
1348
+
1349
+		gpiod_set_value_cansleep(wake_gpio, 0);
1350
+		usleep_range(5000, 6000);
1351
+		gpiod_set_value_cansleep(wake_gpio, 1);
1352
+	}
1353
+
1354
+
1355
+	return ret;
11451356 }
11461357 
11471358 static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops,
....@@ -1162,30 +1373,31 @@
11621373 static const struct i2c_device_id edt_ft5x06_ts_id[] = {
11631374 	{ .name = "edt-ft5x06", .driver_data = (long)&edt_ft5x06_data },
11641375 	{ .name = "edt-ft5506", .driver_data = (long)&edt_ft5506_data },
1376
+	{ .name = "ev-ft5726", .driver_data = (long)&edt_ft5506_data },
11651377 	/* Note no edt- prefix for compatibility with the ft6236.c driver */
11661378 	{ .name = "ft6236", .driver_data = (long)&edt_ft6236_data },
11671379 	{ /* sentinel */ }
11681380 };
11691381 MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id);
11701382 
1171
-#ifdef CONFIG_OF
11721383 static const struct of_device_id edt_ft5x06_of_match[] = {
11731384 	{ .compatible = "edt,edt-ft5206", .data = &edt_ft5x06_data },
11741385 	{ .compatible = "edt,edt-ft5306", .data = &edt_ft5x06_data },
11751386 	{ .compatible = "edt,edt-ft5406", .data = &edt_ft5x06_data },
11761387 	{ .compatible = "edt,edt-ft5506", .data = &edt_ft5506_data },
1388
+	{ .compatible = "evervision,ev-ft5726", .data = &edt_ft5506_data },
11771389 	/* Note focaltech vendor prefix for compatibility with ft6236.c */
11781390 	{ .compatible = "focaltech,ft6236", .data = &edt_ft6236_data },
11791391 	{ /* sentinel */ }
11801392 };
11811393 MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match);
1182
-#endif
11831394 
11841395 static struct i2c_driver edt_ft5x06_ts_driver = {
11851396 	.driver = {
11861397 		.name = "edt_ft5x06",
1187
-		.of_match_table = of_match_ptr(edt_ft5x06_of_match),
1398
+		.of_match_table = edt_ft5x06_of_match,
11881399 		.pm = &edt_ft5x06_ts_pm_ops,
1400
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
11891401 	},
11901402 	.id_table = edt_ft5x06_ts_id,
11911403 	.probe    = edt_ft5x06_ts_probe,
....@@ -1196,4 +1408,4 @@
11961408 
11971409 MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>");
11981410 MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver");
1199
-MODULE_LICENSE("GPL");
1411
+MODULE_LICENSE("GPL v2");