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9c92ab61 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
c7efd123 YY |
2 | /* |
3 | * ROHM BU21023/24 Dual touch support resistive touch screen driver | |
4 | * Copyright (C) 2012 ROHM CO.,LTD. | |
c7efd123 YY |
5 | */ |
6 | #include <linux/delay.h> | |
7 | #include <linux/firmware.h> | |
8 | #include <linux/i2c.h> | |
9 | #include <linux/input.h> | |
10 | #include <linux/input/mt.h> | |
11 | #include <linux/interrupt.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/slab.h> | |
14 | ||
15 | #define BU21023_NAME "bu21023_ts" | |
16 | #define BU21023_FIRMWARE_NAME "bu21023.bin" | |
17 | ||
18 | #define MAX_CONTACTS 2 | |
19 | ||
20 | #define AXIS_ADJUST 4 | |
21 | #define AXIS_OFFSET 8 | |
22 | ||
23 | #define FIRMWARE_BLOCK_SIZE 32U | |
24 | #define FIRMWARE_RETRY_MAX 4 | |
25 | ||
26 | #define SAMPLING_DELAY 12 /* msec */ | |
27 | ||
28 | #define CALIBRATION_RETRY_MAX 6 | |
29 | ||
30 | #define ROHM_TS_ABS_X_MIN 40 | |
31 | #define ROHM_TS_ABS_X_MAX 990 | |
32 | #define ROHM_TS_ABS_Y_MIN 160 | |
33 | #define ROHM_TS_ABS_Y_MAX 920 | |
34 | #define ROHM_TS_DISPLACEMENT_MAX 0 /* zero for infinite */ | |
35 | ||
36 | /* | |
37 | * BU21023GUL/BU21023MUV/BU21024FV-M registers map | |
38 | */ | |
39 | #define VADOUT_YP_H 0x00 | |
40 | #define VADOUT_YP_L 0x01 | |
41 | #define VADOUT_XP_H 0x02 | |
42 | #define VADOUT_XP_L 0x03 | |
43 | #define VADOUT_YN_H 0x04 | |
44 | #define VADOUT_YN_L 0x05 | |
45 | #define VADOUT_XN_H 0x06 | |
46 | #define VADOUT_XN_L 0x07 | |
47 | ||
48 | #define PRM1_X_H 0x08 | |
49 | #define PRM1_X_L 0x09 | |
50 | #define PRM1_Y_H 0x0a | |
51 | #define PRM1_Y_L 0x0b | |
52 | #define PRM2_X_H 0x0c | |
53 | #define PRM2_X_L 0x0d | |
54 | #define PRM2_Y_H 0x0e | |
55 | #define PRM2_Y_L 0x0f | |
56 | ||
57 | #define MLT_PRM_MONI_X 0x10 | |
58 | #define MLT_PRM_MONI_Y 0x11 | |
59 | ||
60 | #define DEBUG_MONI_1 0x12 | |
61 | #define DEBUG_MONI_2 0x13 | |
62 | ||
63 | #define VADOUT_ZX_H 0x14 | |
64 | #define VADOUT_ZX_L 0x15 | |
65 | #define VADOUT_ZY_H 0x16 | |
66 | #define VADOUT_ZY_L 0x17 | |
67 | ||
68 | #define Z_PARAM_H 0x18 | |
69 | #define Z_PARAM_L 0x19 | |
70 | ||
71 | /* | |
72 | * Value for VADOUT_*_L | |
73 | */ | |
74 | #define VADOUT_L_MASK 0x01 | |
75 | ||
76 | /* | |
77 | * Value for PRM*_*_L | |
78 | */ | |
79 | #define PRM_L_MASK 0x01 | |
80 | ||
81 | #define POS_X1_H 0x20 | |
82 | #define POS_X1_L 0x21 | |
83 | #define POS_Y1_H 0x22 | |
84 | #define POS_Y1_L 0x23 | |
85 | #define POS_X2_H 0x24 | |
86 | #define POS_X2_L 0x25 | |
87 | #define POS_Y2_H 0x26 | |
88 | #define POS_Y2_L 0x27 | |
89 | ||
90 | /* | |
91 | * Value for POS_*_L | |
92 | */ | |
93 | #define POS_L_MASK 0x01 | |
94 | ||
95 | #define TOUCH 0x28 | |
96 | #define TOUCH_DETECT 0x01 | |
97 | ||
98 | #define TOUCH_GESTURE 0x29 | |
99 | #define SINGLE_TOUCH 0x01 | |
100 | #define DUAL_TOUCH 0x03 | |
101 | #define TOUCH_MASK 0x03 | |
102 | #define CALIBRATION_REQUEST 0x04 | |
103 | #define CALIBRATION_STATUS 0x08 | |
104 | #define CALIBRATION_MASK 0x0c | |
105 | #define GESTURE_SPREAD 0x10 | |
106 | #define GESTURE_PINCH 0x20 | |
107 | #define GESTURE_ROTATE_R 0x40 | |
108 | #define GESTURE_ROTATE_L 0x80 | |
109 | ||
110 | #define INT_STATUS 0x2a | |
111 | #define INT_MASK 0x3d | |
112 | #define INT_CLEAR 0x3e | |
113 | ||
114 | /* | |
115 | * Values for INT_* | |
116 | */ | |
117 | #define COORD_UPDATE 0x01 | |
118 | #define CALIBRATION_DONE 0x02 | |
119 | #define SLEEP_IN 0x04 | |
120 | #define SLEEP_OUT 0x08 | |
121 | #define PROGRAM_LOAD_DONE 0x10 | |
122 | #define ERROR 0x80 | |
123 | #define INT_ALL 0x9f | |
124 | ||
125 | #define ERR_STATUS 0x2b | |
126 | #define ERR_MASK 0x3f | |
127 | ||
128 | /* | |
129 | * Values for ERR_* | |
130 | */ | |
131 | #define ADC_TIMEOUT 0x01 | |
132 | #define CPU_TIMEOUT 0x02 | |
133 | #define CALIBRATION_ERR 0x04 | |
134 | #define PROGRAM_LOAD_ERR 0x10 | |
135 | ||
136 | #define COMMON_SETUP1 0x30 | |
137 | #define PROGRAM_LOAD_HOST 0x02 | |
138 | #define PROGRAM_LOAD_EEPROM 0x03 | |
139 | #define CENSOR_4PORT 0x04 | |
140 | #define CENSOR_8PORT 0x00 /* Not supported by BU21023 */ | |
141 | #define CALIBRATION_TYPE_DEFAULT 0x08 | |
142 | #define CALIBRATION_TYPE_SPECIAL 0x00 | |
143 | #define INT_ACTIVE_HIGH 0x10 | |
144 | #define INT_ACTIVE_LOW 0x00 | |
145 | #define AUTO_CALIBRATION 0x40 | |
146 | #define MANUAL_CALIBRATION 0x00 | |
147 | #define COMMON_SETUP1_DEFAULT 0x4e | |
148 | ||
149 | #define COMMON_SETUP2 0x31 | |
150 | #define MAF_NONE 0x00 | |
151 | #define MAF_1SAMPLE 0x01 | |
152 | #define MAF_3SAMPLES 0x02 | |
153 | #define MAF_5SAMPLES 0x03 | |
154 | #define INV_Y 0x04 | |
155 | #define INV_X 0x08 | |
156 | #define SWAP_XY 0x10 | |
157 | ||
158 | #define COMMON_SETUP3 0x32 | |
159 | #define EN_SLEEP 0x01 | |
160 | #define EN_MULTI 0x02 | |
161 | #define EN_GESTURE 0x04 | |
162 | #define EN_INTVL 0x08 | |
163 | #define SEL_STEP 0x10 | |
164 | #define SEL_MULTI 0x20 | |
165 | #define SEL_TBL_DEFAULT 0x40 | |
166 | ||
167 | #define INTERVAL_TIME 0x33 | |
168 | #define INTERVAL_TIME_DEFAULT 0x10 | |
169 | ||
170 | #define STEP_X 0x34 | |
171 | #define STEP_X_DEFAULT 0x41 | |
172 | ||
173 | #define STEP_Y 0x35 | |
174 | #define STEP_Y_DEFAULT 0x8d | |
175 | ||
176 | #define OFFSET_X 0x38 | |
177 | #define OFFSET_X_DEFAULT 0x0c | |
178 | ||
179 | #define OFFSET_Y 0x39 | |
180 | #define OFFSET_Y_DEFAULT 0x0c | |
181 | ||
182 | #define THRESHOLD_TOUCH 0x3a | |
183 | #define THRESHOLD_TOUCH_DEFAULT 0xa0 | |
184 | ||
185 | #define THRESHOLD_GESTURE 0x3b | |
186 | #define THRESHOLD_GESTURE_DEFAULT 0x17 | |
187 | ||
188 | #define SYSTEM 0x40 | |
189 | #define ANALOG_POWER_ON 0x01 | |
190 | #define ANALOG_POWER_OFF 0x00 | |
191 | #define CPU_POWER_ON 0x02 | |
192 | #define CPU_POWER_OFF 0x00 | |
193 | ||
194 | #define FORCE_CALIBRATION 0x42 | |
195 | #define FORCE_CALIBRATION_ON 0x01 | |
196 | #define FORCE_CALIBRATION_OFF 0x00 | |
197 | ||
198 | #define CPU_FREQ 0x50 /* 10 / (reg + 1) MHz */ | |
199 | #define CPU_FREQ_10MHZ 0x00 | |
200 | #define CPU_FREQ_5MHZ 0x01 | |
201 | #define CPU_FREQ_1MHZ 0x09 | |
202 | ||
203 | #define EEPROM_ADDR 0x51 | |
204 | ||
205 | #define CALIBRATION_ADJUST 0x52 | |
206 | #define CALIBRATION_ADJUST_DEFAULT 0x00 | |
207 | ||
208 | #define THRESHOLD_SLEEP_IN 0x53 | |
209 | ||
210 | #define EVR_XY 0x56 | |
211 | #define EVR_XY_DEFAULT 0x10 | |
212 | ||
213 | #define PRM_SWOFF_TIME 0x57 | |
214 | #define PRM_SWOFF_TIME_DEFAULT 0x04 | |
215 | ||
216 | #define PROGRAM_VERSION 0x5f | |
217 | ||
218 | #define ADC_CTRL 0x60 | |
219 | #define ADC_DIV_MASK 0x1f /* The minimum value is 4 */ | |
220 | #define ADC_DIV_DEFAULT 0x08 | |
221 | ||
222 | #define ADC_WAIT 0x61 | |
223 | #define ADC_WAIT_DEFAULT 0x0a | |
224 | ||
225 | #define SWCONT 0x62 | |
226 | #define SWCONT_DEFAULT 0x0f | |
227 | ||
228 | #define EVR_X 0x63 | |
229 | #define EVR_X_DEFAULT 0x86 | |
230 | ||
231 | #define EVR_Y 0x64 | |
232 | #define EVR_Y_DEFAULT 0x64 | |
233 | ||
234 | #define TEST1 0x65 | |
235 | #define DUALTOUCH_STABILIZE_ON 0x01 | |
236 | #define DUALTOUCH_STABILIZE_OFF 0x00 | |
237 | #define DUALTOUCH_REG_ON 0x20 | |
238 | #define DUALTOUCH_REG_OFF 0x00 | |
239 | ||
240 | #define CALIBRATION_REG1 0x68 | |
241 | #define CALIBRATION_REG1_DEFAULT 0xd9 | |
242 | ||
243 | #define CALIBRATION_REG2 0x69 | |
244 | #define CALIBRATION_REG2_DEFAULT 0x36 | |
245 | ||
246 | #define CALIBRATION_REG3 0x6a | |
247 | #define CALIBRATION_REG3_DEFAULT 0x32 | |
248 | ||
249 | #define EX_ADDR_H 0x70 | |
250 | #define EX_ADDR_L 0x71 | |
251 | #define EX_WDAT 0x72 | |
252 | #define EX_RDAT 0x73 | |
253 | #define EX_CHK_SUM1 0x74 | |
254 | #define EX_CHK_SUM2 0x75 | |
255 | #define EX_CHK_SUM3 0x76 | |
256 | ||
257 | struct rohm_ts_data { | |
258 | struct i2c_client *client; | |
259 | struct input_dev *input; | |
260 | ||
261 | bool initialized; | |
262 | ||
263 | unsigned int contact_count[MAX_CONTACTS + 1]; | |
264 | int finger_count; | |
265 | ||
266 | u8 setup2; | |
267 | }; | |
268 | ||
269 | /* | |
270 | * rohm_i2c_burst_read - execute combined I2C message for ROHM BU21023/24 | |
271 | * @client: Handle to ROHM BU21023/24 | |
272 | * @start: Where to start read address from ROHM BU21023/24 | |
273 | * @buf: Where to store read data from ROHM BU21023/24 | |
274 | * @len: How many bytes to read | |
275 | * | |
276 | * Returns negative errno, else zero on success. | |
277 | * | |
278 | * Note | |
279 | * In BU21023/24 burst read, stop condition is needed after "address write". | |
280 | * Therefore, transmission is performed in 2 steps. | |
281 | */ | |
282 | static int rohm_i2c_burst_read(struct i2c_client *client, u8 start, void *buf, | |
283 | size_t len) | |
284 | { | |
285 | struct i2c_adapter *adap = client->adapter; | |
286 | struct i2c_msg msg[2]; | |
287 | int i, ret = 0; | |
288 | ||
289 | msg[0].addr = client->addr; | |
290 | msg[0].flags = 0; | |
291 | msg[0].len = 1; | |
292 | msg[0].buf = &start; | |
293 | ||
294 | msg[1].addr = client->addr; | |
295 | msg[1].flags = I2C_M_RD; | |
296 | msg[1].len = len; | |
297 | msg[1].buf = buf; | |
298 | ||
193c2a07 | 299 | i2c_lock_bus(adap, I2C_LOCK_SEGMENT); |
c7efd123 YY |
300 | |
301 | for (i = 0; i < 2; i++) { | |
302 | if (__i2c_transfer(adap, &msg[i], 1) < 0) { | |
303 | ret = -EIO; | |
304 | break; | |
305 | } | |
306 | } | |
307 | ||
193c2a07 | 308 | i2c_unlock_bus(adap, I2C_LOCK_SEGMENT); |
c7efd123 YY |
309 | |
310 | return ret; | |
311 | } | |
312 | ||
313 | static int rohm_ts_manual_calibration(struct rohm_ts_data *ts) | |
314 | { | |
315 | struct i2c_client *client = ts->client; | |
316 | struct device *dev = &client->dev; | |
317 | u8 buf[33]; /* for PRM1_X_H(0x08)-TOUCH(0x28) */ | |
318 | ||
319 | int retry; | |
320 | bool success = false; | |
321 | bool first_time = true; | |
322 | bool calibration_done; | |
323 | ||
324 | u8 reg1, reg2, reg3; | |
325 | s32 reg1_orig, reg2_orig, reg3_orig; | |
326 | s32 val; | |
327 | ||
328 | int calib_x = 0, calib_y = 0; | |
329 | int reg_x, reg_y; | |
330 | int err_x, err_y; | |
331 | ||
332 | int error, error2; | |
333 | int i; | |
334 | ||
335 | reg1_orig = i2c_smbus_read_byte_data(client, CALIBRATION_REG1); | |
336 | if (reg1_orig < 0) | |
337 | return reg1_orig; | |
338 | ||
339 | reg2_orig = i2c_smbus_read_byte_data(client, CALIBRATION_REG2); | |
340 | if (reg2_orig < 0) | |
341 | return reg2_orig; | |
342 | ||
343 | reg3_orig = i2c_smbus_read_byte_data(client, CALIBRATION_REG3); | |
344 | if (reg3_orig < 0) | |
345 | return reg3_orig; | |
346 | ||
347 | error = i2c_smbus_write_byte_data(client, INT_MASK, | |
348 | COORD_UPDATE | SLEEP_IN | SLEEP_OUT | | |
349 | PROGRAM_LOAD_DONE); | |
350 | if (error) | |
351 | goto out; | |
352 | ||
353 | error = i2c_smbus_write_byte_data(client, TEST1, | |
354 | DUALTOUCH_STABILIZE_ON); | |
355 | if (error) | |
356 | goto out; | |
357 | ||
358 | for (retry = 0; retry < CALIBRATION_RETRY_MAX; retry++) { | |
359 | /* wait 2 sampling for update */ | |
360 | mdelay(2 * SAMPLING_DELAY); | |
361 | ||
362 | #define READ_CALIB_BUF(reg) buf[((reg) - PRM1_X_H)] | |
363 | ||
364 | error = rohm_i2c_burst_read(client, PRM1_X_H, buf, sizeof(buf)); | |
365 | if (error) | |
366 | goto out; | |
367 | ||
368 | if (READ_CALIB_BUF(TOUCH) & TOUCH_DETECT) | |
369 | continue; | |
370 | ||
371 | if (first_time) { | |
372 | /* generate calibration parameter */ | |
373 | calib_x = ((int)READ_CALIB_BUF(PRM1_X_H) << 2 | | |
374 | READ_CALIB_BUF(PRM1_X_L)) - AXIS_OFFSET; | |
375 | calib_y = ((int)READ_CALIB_BUF(PRM1_Y_H) << 2 | | |
376 | READ_CALIB_BUF(PRM1_Y_L)) - AXIS_OFFSET; | |
377 | ||
378 | error = i2c_smbus_write_byte_data(client, TEST1, | |
379 | DUALTOUCH_STABILIZE_ON | DUALTOUCH_REG_ON); | |
380 | if (error) | |
381 | goto out; | |
382 | ||
383 | first_time = false; | |
384 | } else { | |
385 | /* generate adjustment parameter */ | |
386 | err_x = (int)READ_CALIB_BUF(PRM1_X_H) << 2 | | |
387 | READ_CALIB_BUF(PRM1_X_L); | |
388 | err_y = (int)READ_CALIB_BUF(PRM1_Y_H) << 2 | | |
389 | READ_CALIB_BUF(PRM1_Y_L); | |
390 | ||
391 | /* X axis ajust */ | |
392 | if (err_x <= 4) | |
393 | calib_x -= AXIS_ADJUST; | |
394 | else if (err_x >= 60) | |
395 | calib_x += AXIS_ADJUST; | |
396 | ||
397 | /* Y axis ajust */ | |
398 | if (err_y <= 4) | |
399 | calib_y -= AXIS_ADJUST; | |
400 | else if (err_y >= 60) | |
401 | calib_y += AXIS_ADJUST; | |
402 | } | |
403 | ||
404 | /* generate calibration setting value */ | |
405 | reg_x = calib_x + ((calib_x & 0x200) << 1); | |
406 | reg_y = calib_y + ((calib_y & 0x200) << 1); | |
407 | ||
408 | /* convert for register format */ | |
409 | reg1 = reg_x >> 3; | |
410 | reg2 = (reg_y & 0x7) << 4 | (reg_x & 0x7); | |
411 | reg3 = reg_y >> 3; | |
412 | ||
413 | error = i2c_smbus_write_byte_data(client, | |
414 | CALIBRATION_REG1, reg1); | |
415 | if (error) | |
416 | goto out; | |
417 | ||
418 | error = i2c_smbus_write_byte_data(client, | |
419 | CALIBRATION_REG2, reg2); | |
420 | if (error) | |
421 | goto out; | |
422 | ||
423 | error = i2c_smbus_write_byte_data(client, | |
424 | CALIBRATION_REG3, reg3); | |
425 | if (error) | |
426 | goto out; | |
427 | ||
428 | /* | |
429 | * force calibration sequcence | |
430 | */ | |
431 | error = i2c_smbus_write_byte_data(client, FORCE_CALIBRATION, | |
432 | FORCE_CALIBRATION_OFF); | |
433 | if (error) | |
434 | goto out; | |
435 | ||
436 | error = i2c_smbus_write_byte_data(client, FORCE_CALIBRATION, | |
437 | FORCE_CALIBRATION_ON); | |
438 | if (error) | |
439 | goto out; | |
440 | ||
441 | /* clear all interrupts */ | |
442 | error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff); | |
443 | if (error) | |
444 | goto out; | |
445 | ||
446 | /* | |
447 | * Wait for the status change of calibration, max 10 sampling | |
448 | */ | |
449 | calibration_done = false; | |
450 | ||
451 | for (i = 0; i < 10; i++) { | |
452 | mdelay(SAMPLING_DELAY); | |
453 | ||
454 | val = i2c_smbus_read_byte_data(client, TOUCH_GESTURE); | |
455 | if (!(val & CALIBRATION_MASK)) { | |
456 | calibration_done = true; | |
457 | break; | |
458 | } else if (val < 0) { | |
459 | error = val; | |
460 | goto out; | |
461 | } | |
462 | } | |
463 | ||
464 | if (calibration_done) { | |
465 | val = i2c_smbus_read_byte_data(client, INT_STATUS); | |
466 | if (val == CALIBRATION_DONE) { | |
467 | success = true; | |
468 | break; | |
469 | } else if (val < 0) { | |
470 | error = val; | |
471 | goto out; | |
472 | } | |
473 | } else { | |
474 | dev_warn(dev, "calibration timeout\n"); | |
475 | } | |
476 | } | |
477 | ||
478 | if (!success) { | |
479 | error = i2c_smbus_write_byte_data(client, CALIBRATION_REG1, | |
480 | reg1_orig); | |
481 | if (error) | |
482 | goto out; | |
483 | ||
484 | error = i2c_smbus_write_byte_data(client, CALIBRATION_REG2, | |
485 | reg2_orig); | |
486 | if (error) | |
487 | goto out; | |
488 | ||
489 | error = i2c_smbus_write_byte_data(client, CALIBRATION_REG3, | |
490 | reg3_orig); | |
491 | if (error) | |
492 | goto out; | |
493 | ||
494 | /* calibration data enable */ | |
495 | error = i2c_smbus_write_byte_data(client, TEST1, | |
496 | DUALTOUCH_STABILIZE_ON | | |
497 | DUALTOUCH_REG_ON); | |
498 | if (error) | |
499 | goto out; | |
500 | ||
501 | /* wait 10 sampling */ | |
502 | mdelay(10 * SAMPLING_DELAY); | |
503 | ||
504 | error = -EBUSY; | |
505 | } | |
506 | ||
507 | out: | |
508 | error2 = i2c_smbus_write_byte_data(client, INT_MASK, INT_ALL); | |
509 | if (!error2) | |
510 | /* Clear all interrupts */ | |
511 | error2 = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff); | |
512 | ||
513 | return error ? error : error2; | |
514 | } | |
515 | ||
516 | static const unsigned int untouch_threshold[3] = { 0, 1, 5 }; | |
517 | static const unsigned int single_touch_threshold[3] = { 0, 0, 4 }; | |
518 | static const unsigned int dual_touch_threshold[3] = { 10, 8, 0 }; | |
519 | ||
520 | static irqreturn_t rohm_ts_soft_irq(int irq, void *dev_id) | |
521 | { | |
522 | struct rohm_ts_data *ts = dev_id; | |
523 | struct i2c_client *client = ts->client; | |
524 | struct input_dev *input_dev = ts->input; | |
525 | struct device *dev = &client->dev; | |
526 | ||
527 | u8 buf[10]; /* for POS_X1_H(0x20)-TOUCH_GESTURE(0x29) */ | |
528 | ||
529 | struct input_mt_pos pos[MAX_CONTACTS]; | |
530 | int slots[MAX_CONTACTS]; | |
531 | u8 touch_flags; | |
532 | unsigned int threshold; | |
533 | int finger_count = -1; | |
534 | int prev_finger_count = ts->finger_count; | |
535 | int count; | |
536 | int error; | |
537 | int i; | |
538 | ||
539 | error = i2c_smbus_write_byte_data(client, INT_MASK, INT_ALL); | |
540 | if (error) | |
541 | return IRQ_HANDLED; | |
542 | ||
543 | /* Clear all interrupts */ | |
544 | error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff); | |
545 | if (error) | |
546 | return IRQ_HANDLED; | |
547 | ||
548 | #define READ_POS_BUF(reg) buf[((reg) - POS_X1_H)] | |
549 | ||
550 | error = rohm_i2c_burst_read(client, POS_X1_H, buf, sizeof(buf)); | |
551 | if (error) | |
552 | return IRQ_HANDLED; | |
553 | ||
554 | touch_flags = READ_POS_BUF(TOUCH_GESTURE) & TOUCH_MASK; | |
555 | if (touch_flags) { | |
556 | /* generate coordinates */ | |
557 | pos[0].x = ((s16)READ_POS_BUF(POS_X1_H) << 2) | | |
558 | READ_POS_BUF(POS_X1_L); | |
559 | pos[0].y = ((s16)READ_POS_BUF(POS_Y1_H) << 2) | | |
560 | READ_POS_BUF(POS_Y1_L); | |
561 | pos[1].x = ((s16)READ_POS_BUF(POS_X2_H) << 2) | | |
562 | READ_POS_BUF(POS_X2_L); | |
563 | pos[1].y = ((s16)READ_POS_BUF(POS_Y2_H) << 2) | | |
564 | READ_POS_BUF(POS_Y2_L); | |
565 | } | |
566 | ||
567 | switch (touch_flags) { | |
568 | case 0: | |
569 | threshold = untouch_threshold[prev_finger_count]; | |
570 | if (++ts->contact_count[0] >= threshold) | |
571 | finger_count = 0; | |
572 | break; | |
573 | ||
574 | case SINGLE_TOUCH: | |
575 | threshold = single_touch_threshold[prev_finger_count]; | |
576 | if (++ts->contact_count[1] >= threshold) | |
577 | finger_count = 1; | |
578 | ||
579 | if (finger_count == 1) { | |
580 | if (pos[1].x != 0 && pos[1].y != 0) { | |
581 | pos[0].x = pos[1].x; | |
582 | pos[0].y = pos[1].y; | |
583 | pos[1].x = 0; | |
584 | pos[1].y = 0; | |
585 | } | |
586 | } | |
587 | break; | |
588 | ||
589 | case DUAL_TOUCH: | |
590 | threshold = dual_touch_threshold[prev_finger_count]; | |
591 | if (++ts->contact_count[2] >= threshold) | |
592 | finger_count = 2; | |
593 | break; | |
594 | ||
595 | default: | |
596 | dev_dbg(dev, | |
597 | "Three or more touches are not supported\n"); | |
598 | return IRQ_HANDLED; | |
599 | } | |
600 | ||
601 | if (finger_count >= 0) { | |
602 | if (prev_finger_count != finger_count) { | |
603 | count = ts->contact_count[finger_count]; | |
604 | memset(ts->contact_count, 0, sizeof(ts->contact_count)); | |
605 | ts->contact_count[finger_count] = count; | |
606 | } | |
607 | ||
608 | input_mt_assign_slots(input_dev, slots, pos, | |
609 | finger_count, ROHM_TS_DISPLACEMENT_MAX); | |
610 | ||
611 | for (i = 0; i < finger_count; i++) { | |
612 | input_mt_slot(input_dev, slots[i]); | |
613 | input_mt_report_slot_state(input_dev, | |
614 | MT_TOOL_FINGER, true); | |
615 | input_report_abs(input_dev, | |
616 | ABS_MT_POSITION_X, pos[i].x); | |
617 | input_report_abs(input_dev, | |
618 | ABS_MT_POSITION_Y, pos[i].y); | |
619 | } | |
620 | ||
621 | input_mt_sync_frame(input_dev); | |
622 | input_mt_report_pointer_emulation(input_dev, true); | |
623 | input_sync(input_dev); | |
624 | ||
625 | ts->finger_count = finger_count; | |
626 | } | |
627 | ||
628 | if (READ_POS_BUF(TOUCH_GESTURE) & CALIBRATION_REQUEST) { | |
629 | error = rohm_ts_manual_calibration(ts); | |
630 | if (error) | |
631 | dev_warn(dev, "manual calibration failed: %d\n", | |
632 | error); | |
633 | } | |
634 | ||
635 | i2c_smbus_write_byte_data(client, INT_MASK, | |
636 | CALIBRATION_DONE | SLEEP_OUT | SLEEP_IN | | |
637 | PROGRAM_LOAD_DONE); | |
638 | ||
639 | return IRQ_HANDLED; | |
640 | } | |
641 | ||
642 | static int rohm_ts_load_firmware(struct i2c_client *client, | |
643 | const char *firmware_name) | |
644 | { | |
645 | struct device *dev = &client->dev; | |
c7efd123 YY |
646 | s32 status; |
647 | unsigned int offset, len, xfer_len; | |
648 | unsigned int retry = 0; | |
649 | int error, error2; | |
650 | ||
f2845b4f | 651 | const struct firmware *fw __free(firmware) = NULL; |
c7efd123 YY |
652 | error = request_firmware(&fw, firmware_name, dev); |
653 | if (error) { | |
654 | dev_err(dev, "unable to retrieve firmware %s: %d\n", | |
655 | firmware_name, error); | |
656 | return error; | |
657 | } | |
658 | ||
659 | error = i2c_smbus_write_byte_data(client, INT_MASK, | |
660 | COORD_UPDATE | CALIBRATION_DONE | | |
661 | SLEEP_IN | SLEEP_OUT); | |
662 | if (error) | |
663 | goto out; | |
664 | ||
665 | do { | |
666 | if (retry) { | |
667 | dev_warn(dev, "retrying firmware load\n"); | |
668 | ||
669 | /* settings for retry */ | |
670 | error = i2c_smbus_write_byte_data(client, EX_WDAT, 0); | |
671 | if (error) | |
672 | goto out; | |
673 | } | |
674 | ||
675 | error = i2c_smbus_write_byte_data(client, EX_ADDR_H, 0); | |
676 | if (error) | |
677 | goto out; | |
678 | ||
679 | error = i2c_smbus_write_byte_data(client, EX_ADDR_L, 0); | |
680 | if (error) | |
681 | goto out; | |
682 | ||
683 | error = i2c_smbus_write_byte_data(client, COMMON_SETUP1, | |
684 | COMMON_SETUP1_DEFAULT); | |
685 | if (error) | |
686 | goto out; | |
687 | ||
688 | /* firmware load to the device */ | |
689 | offset = 0; | |
690 | len = fw->size; | |
691 | ||
692 | while (len) { | |
693 | xfer_len = min(FIRMWARE_BLOCK_SIZE, len); | |
694 | ||
695 | error = i2c_smbus_write_i2c_block_data(client, EX_WDAT, | |
696 | xfer_len, &fw->data[offset]); | |
697 | if (error) | |
698 | goto out; | |
699 | ||
700 | len -= xfer_len; | |
701 | offset += xfer_len; | |
702 | } | |
703 | ||
704 | /* check firmware load result */ | |
705 | status = i2c_smbus_read_byte_data(client, INT_STATUS); | |
706 | if (status < 0) { | |
707 | error = status; | |
708 | goto out; | |
709 | } | |
710 | ||
711 | /* clear all interrupts */ | |
712 | error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff); | |
713 | if (error) | |
714 | goto out; | |
715 | ||
716 | if (status == PROGRAM_LOAD_DONE) | |
717 | break; | |
718 | ||
719 | error = -EIO; | |
415a249f | 720 | } while (++retry <= FIRMWARE_RETRY_MAX); |
c7efd123 YY |
721 | |
722 | out: | |
723 | error2 = i2c_smbus_write_byte_data(client, INT_MASK, INT_ALL); | |
724 | ||
c7efd123 YY |
725 | return error ? error : error2; |
726 | } | |
727 | ||
4a56aea5 DT |
728 | static int rohm_ts_update_setting(struct rohm_ts_data *ts, |
729 | unsigned int setting_bit, bool on) | |
730 | { | |
731 | int error; | |
732 | ||
f2845b4f DT |
733 | scoped_cond_guard(mutex_intr, return -EINTR, &ts->input->mutex) { |
734 | if (on) | |
735 | ts->setup2 |= setting_bit; | |
736 | else | |
737 | ts->setup2 &= ~setting_bit; | |
4a56aea5 | 738 | |
f2845b4f DT |
739 | if (ts->initialized) { |
740 | error = i2c_smbus_write_byte_data(ts->client, | |
741 | COMMON_SETUP2, | |
742 | ts->setup2); | |
743 | if (error) | |
744 | return error; | |
745 | } | |
746 | } | |
4a56aea5 | 747 | |
f2845b4f | 748 | return 0; |
4a56aea5 DT |
749 | } |
750 | ||
c7efd123 YY |
751 | static ssize_t swap_xy_show(struct device *dev, struct device_attribute *attr, |
752 | char *buf) | |
753 | { | |
754 | struct i2c_client *client = to_i2c_client(dev); | |
755 | struct rohm_ts_data *ts = i2c_get_clientdata(client); | |
756 | ||
bf5cba8c | 757 | return sysfs_emit(buf, "%d\n", !!(ts->setup2 & SWAP_XY)); |
c7efd123 YY |
758 | } |
759 | ||
760 | static ssize_t swap_xy_store(struct device *dev, struct device_attribute *attr, | |
761 | const char *buf, size_t count) | |
762 | { | |
763 | struct i2c_client *client = to_i2c_client(dev); | |
764 | struct rohm_ts_data *ts = i2c_get_clientdata(client); | |
765 | unsigned int val; | |
766 | int error; | |
767 | ||
768 | error = kstrtouint(buf, 0, &val); | |
769 | if (error) | |
770 | return error; | |
771 | ||
4a56aea5 DT |
772 | error = rohm_ts_update_setting(ts, SWAP_XY, val); |
773 | return error ?: count; | |
c7efd123 YY |
774 | } |
775 | ||
776 | static ssize_t inv_x_show(struct device *dev, struct device_attribute *attr, | |
777 | char *buf) | |
778 | { | |
779 | struct i2c_client *client = to_i2c_client(dev); | |
780 | struct rohm_ts_data *ts = i2c_get_clientdata(client); | |
781 | ||
bf5cba8c | 782 | return sysfs_emit(buf, "%d\n", !!(ts->setup2 & INV_X)); |
c7efd123 YY |
783 | } |
784 | ||
785 | static ssize_t inv_x_store(struct device *dev, struct device_attribute *attr, | |
786 | const char *buf, size_t count) | |
787 | { | |
788 | struct i2c_client *client = to_i2c_client(dev); | |
789 | struct rohm_ts_data *ts = i2c_get_clientdata(client); | |
790 | unsigned int val; | |
791 | int error; | |
792 | ||
793 | error = kstrtouint(buf, 0, &val); | |
794 | if (error) | |
795 | return error; | |
796 | ||
4a56aea5 DT |
797 | error = rohm_ts_update_setting(ts, INV_X, val); |
798 | return error ?: count; | |
c7efd123 YY |
799 | } |
800 | ||
801 | static ssize_t inv_y_show(struct device *dev, struct device_attribute *attr, | |
802 | char *buf) | |
803 | { | |
804 | struct i2c_client *client = to_i2c_client(dev); | |
805 | struct rohm_ts_data *ts = i2c_get_clientdata(client); | |
806 | ||
bf5cba8c | 807 | return sysfs_emit(buf, "%d\n", !!(ts->setup2 & INV_Y)); |
c7efd123 YY |
808 | } |
809 | ||
810 | static ssize_t inv_y_store(struct device *dev, struct device_attribute *attr, | |
811 | const char *buf, size_t count) | |
812 | { | |
813 | struct i2c_client *client = to_i2c_client(dev); | |
814 | struct rohm_ts_data *ts = i2c_get_clientdata(client); | |
815 | unsigned int val; | |
816 | int error; | |
817 | ||
818 | error = kstrtouint(buf, 0, &val); | |
819 | if (error) | |
820 | return error; | |
821 | ||
4a56aea5 DT |
822 | error = rohm_ts_update_setting(ts, INV_Y, val); |
823 | return error ?: count; | |
c7efd123 YY |
824 | } |
825 | ||
826 | static DEVICE_ATTR_RW(swap_xy); | |
827 | static DEVICE_ATTR_RW(inv_x); | |
828 | static DEVICE_ATTR_RW(inv_y); | |
829 | ||
830 | static struct attribute *rohm_ts_attrs[] = { | |
831 | &dev_attr_swap_xy.attr, | |
832 | &dev_attr_inv_x.attr, | |
833 | &dev_attr_inv_y.attr, | |
834 | NULL, | |
835 | }; | |
3837a4b9 | 836 | ATTRIBUTE_GROUPS(rohm_ts); |
c7efd123 YY |
837 | |
838 | static int rohm_ts_device_init(struct i2c_client *client, u8 setup2) | |
839 | { | |
840 | struct device *dev = &client->dev; | |
841 | int error; | |
842 | ||
f2845b4f | 843 | guard(disable_irq)(&client->irq); |
c7efd123 YY |
844 | |
845 | /* | |
846 | * Wait 200usec for reset | |
847 | */ | |
848 | udelay(200); | |
849 | ||
850 | /* Release analog reset */ | |
851 | error = i2c_smbus_write_byte_data(client, SYSTEM, | |
852 | ANALOG_POWER_ON | CPU_POWER_OFF); | |
853 | if (error) | |
854 | return error; | |
855 | ||
856 | /* Waiting for the analog warm-up, max. 200usec */ | |
857 | udelay(200); | |
858 | ||
859 | /* clear all interrupts */ | |
860 | error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff); | |
861 | if (error) | |
862 | return error; | |
863 | ||
864 | error = i2c_smbus_write_byte_data(client, EX_WDAT, 0); | |
865 | if (error) | |
866 | return error; | |
867 | ||
868 | error = i2c_smbus_write_byte_data(client, COMMON_SETUP1, 0); | |
869 | if (error) | |
870 | return error; | |
871 | ||
872 | error = i2c_smbus_write_byte_data(client, COMMON_SETUP2, setup2); | |
873 | if (error) | |
874 | return error; | |
875 | ||
876 | error = i2c_smbus_write_byte_data(client, COMMON_SETUP3, | |
877 | SEL_TBL_DEFAULT | EN_MULTI); | |
878 | if (error) | |
879 | return error; | |
880 | ||
881 | error = i2c_smbus_write_byte_data(client, THRESHOLD_GESTURE, | |
882 | THRESHOLD_GESTURE_DEFAULT); | |
883 | if (error) | |
884 | return error; | |
885 | ||
886 | error = i2c_smbus_write_byte_data(client, INTERVAL_TIME, | |
887 | INTERVAL_TIME_DEFAULT); | |
888 | if (error) | |
889 | return error; | |
890 | ||
891 | error = i2c_smbus_write_byte_data(client, CPU_FREQ, CPU_FREQ_10MHZ); | |
892 | if (error) | |
893 | return error; | |
894 | ||
895 | error = i2c_smbus_write_byte_data(client, PRM_SWOFF_TIME, | |
896 | PRM_SWOFF_TIME_DEFAULT); | |
897 | if (error) | |
898 | return error; | |
899 | ||
900 | error = i2c_smbus_write_byte_data(client, ADC_CTRL, ADC_DIV_DEFAULT); | |
901 | if (error) | |
902 | return error; | |
903 | ||
904 | error = i2c_smbus_write_byte_data(client, ADC_WAIT, ADC_WAIT_DEFAULT); | |
905 | if (error) | |
906 | return error; | |
907 | ||
908 | /* | |
909 | * Panel setup, these values change with the panel. | |
910 | */ | |
911 | error = i2c_smbus_write_byte_data(client, STEP_X, STEP_X_DEFAULT); | |
912 | if (error) | |
913 | return error; | |
914 | ||
915 | error = i2c_smbus_write_byte_data(client, STEP_Y, STEP_Y_DEFAULT); | |
916 | if (error) | |
917 | return error; | |
918 | ||
919 | error = i2c_smbus_write_byte_data(client, OFFSET_X, OFFSET_X_DEFAULT); | |
920 | if (error) | |
921 | return error; | |
922 | ||
923 | error = i2c_smbus_write_byte_data(client, OFFSET_Y, OFFSET_Y_DEFAULT); | |
924 | if (error) | |
925 | return error; | |
926 | ||
927 | error = i2c_smbus_write_byte_data(client, THRESHOLD_TOUCH, | |
928 | THRESHOLD_TOUCH_DEFAULT); | |
929 | if (error) | |
930 | return error; | |
931 | ||
932 | error = i2c_smbus_write_byte_data(client, EVR_XY, EVR_XY_DEFAULT); | |
933 | if (error) | |
934 | return error; | |
935 | ||
936 | error = i2c_smbus_write_byte_data(client, EVR_X, EVR_X_DEFAULT); | |
937 | if (error) | |
938 | return error; | |
939 | ||
940 | error = i2c_smbus_write_byte_data(client, EVR_Y, EVR_Y_DEFAULT); | |
941 | if (error) | |
942 | return error; | |
943 | ||
944 | /* Fixed value settings */ | |
945 | error = i2c_smbus_write_byte_data(client, CALIBRATION_ADJUST, | |
946 | CALIBRATION_ADJUST_DEFAULT); | |
947 | if (error) | |
948 | return error; | |
949 | ||
950 | error = i2c_smbus_write_byte_data(client, SWCONT, SWCONT_DEFAULT); | |
951 | if (error) | |
952 | return error; | |
953 | ||
954 | error = i2c_smbus_write_byte_data(client, TEST1, | |
955 | DUALTOUCH_STABILIZE_ON | | |
956 | DUALTOUCH_REG_ON); | |
957 | if (error) | |
958 | return error; | |
959 | ||
960 | error = rohm_ts_load_firmware(client, BU21023_FIRMWARE_NAME); | |
961 | if (error) { | |
962 | dev_err(dev, "failed to load firmware: %d\n", error); | |
963 | return error; | |
964 | } | |
965 | ||
966 | /* | |
967 | * Manual calibration results are not changed in same environment. | |
968 | * If the force calibration is performed, | |
969 | * the controller will not require calibration request interrupt | |
970 | * when the typical values are set to the calibration registers. | |
971 | */ | |
972 | error = i2c_smbus_write_byte_data(client, CALIBRATION_REG1, | |
973 | CALIBRATION_REG1_DEFAULT); | |
974 | if (error) | |
975 | return error; | |
976 | ||
977 | error = i2c_smbus_write_byte_data(client, CALIBRATION_REG2, | |
978 | CALIBRATION_REG2_DEFAULT); | |
979 | if (error) | |
980 | return error; | |
981 | ||
982 | error = i2c_smbus_write_byte_data(client, CALIBRATION_REG3, | |
983 | CALIBRATION_REG3_DEFAULT); | |
984 | if (error) | |
985 | return error; | |
986 | ||
987 | error = i2c_smbus_write_byte_data(client, FORCE_CALIBRATION, | |
988 | FORCE_CALIBRATION_OFF); | |
989 | if (error) | |
990 | return error; | |
991 | ||
992 | error = i2c_smbus_write_byte_data(client, FORCE_CALIBRATION, | |
993 | FORCE_CALIBRATION_ON); | |
994 | if (error) | |
995 | return error; | |
996 | ||
997 | /* Clear all interrupts */ | |
998 | error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff); | |
999 | if (error) | |
1000 | return error; | |
1001 | ||
1002 | /* Enable coordinates update interrupt */ | |
1003 | error = i2c_smbus_write_byte_data(client, INT_MASK, | |
1004 | CALIBRATION_DONE | SLEEP_OUT | | |
1005 | SLEEP_IN | PROGRAM_LOAD_DONE); | |
1006 | if (error) | |
1007 | return error; | |
1008 | ||
1009 | error = i2c_smbus_write_byte_data(client, ERR_MASK, | |
1010 | PROGRAM_LOAD_ERR | CPU_TIMEOUT | | |
1011 | ADC_TIMEOUT); | |
1012 | if (error) | |
1013 | return error; | |
1014 | ||
1015 | /* controller CPU power on */ | |
1016 | error = i2c_smbus_write_byte_data(client, SYSTEM, | |
1017 | ANALOG_POWER_ON | CPU_POWER_ON); | |
f2845b4f DT |
1018 | if (error) |
1019 | return error; | |
c7efd123 | 1020 | |
f2845b4f | 1021 | return 0; |
c7efd123 YY |
1022 | } |
1023 | ||
1024 | static int rohm_ts_power_off(struct i2c_client *client) | |
1025 | { | |
1026 | int error; | |
1027 | ||
1028 | error = i2c_smbus_write_byte_data(client, SYSTEM, | |
1029 | ANALOG_POWER_ON | CPU_POWER_OFF); | |
1030 | if (error) { | |
1031 | dev_err(&client->dev, | |
1032 | "failed to power off device CPU: %d\n", error); | |
1033 | return error; | |
1034 | } | |
1035 | ||
1036 | error = i2c_smbus_write_byte_data(client, SYSTEM, | |
1037 | ANALOG_POWER_OFF | CPU_POWER_OFF); | |
1038 | if (error) | |
1039 | dev_err(&client->dev, | |
1040 | "failed to power off the device: %d\n", error); | |
1041 | ||
1042 | return error; | |
1043 | } | |
1044 | ||
1045 | static int rohm_ts_open(struct input_dev *input_dev) | |
1046 | { | |
1047 | struct rohm_ts_data *ts = input_get_drvdata(input_dev); | |
1048 | struct i2c_client *client = ts->client; | |
1049 | int error; | |
1050 | ||
1051 | if (!ts->initialized) { | |
1052 | error = rohm_ts_device_init(client, ts->setup2); | |
1053 | if (error) { | |
1054 | dev_err(&client->dev, | |
1055 | "device initialization failed: %d\n", error); | |
1056 | return error; | |
1057 | } | |
1058 | ||
1059 | ts->initialized = true; | |
1060 | } | |
1061 | ||
1062 | return 0; | |
1063 | } | |
1064 | ||
1065 | static void rohm_ts_close(struct input_dev *input_dev) | |
1066 | { | |
1067 | struct rohm_ts_data *ts = input_get_drvdata(input_dev); | |
1068 | ||
1069 | rohm_ts_power_off(ts->client); | |
1070 | ||
1071 | ts->initialized = false; | |
1072 | } | |
1073 | ||
57e72dd7 | 1074 | static int rohm_bu21023_i2c_probe(struct i2c_client *client) |
c7efd123 YY |
1075 | { |
1076 | struct device *dev = &client->dev; | |
1077 | struct rohm_ts_data *ts; | |
1078 | struct input_dev *input; | |
1079 | int error; | |
1080 | ||
1081 | if (!client->irq) { | |
1082 | dev_err(dev, "IRQ is not assigned\n"); | |
1083 | return -EINVAL; | |
1084 | } | |
1085 | ||
1086 | if (!client->adapter->algo->master_xfer) { | |
1087 | dev_err(dev, "I2C level transfers not supported\n"); | |
1088 | return -EOPNOTSUPP; | |
1089 | } | |
1090 | ||
1091 | /* Turn off CPU just in case */ | |
1092 | error = rohm_ts_power_off(client); | |
1093 | if (error) | |
1094 | return error; | |
1095 | ||
1096 | ts = devm_kzalloc(dev, sizeof(struct rohm_ts_data), GFP_KERNEL); | |
1097 | if (!ts) | |
1098 | return -ENOMEM; | |
1099 | ||
1100 | ts->client = client; | |
1101 | ts->setup2 = MAF_1SAMPLE; | |
1102 | i2c_set_clientdata(client, ts); | |
1103 | ||
1104 | input = devm_input_allocate_device(dev); | |
1105 | if (!input) | |
1106 | return -ENOMEM; | |
1107 | ||
1108 | input->name = BU21023_NAME; | |
1109 | input->id.bustype = BUS_I2C; | |
1110 | input->open = rohm_ts_open; | |
1111 | input->close = rohm_ts_close; | |
1112 | ||
1113 | ts->input = input; | |
1114 | input_set_drvdata(input, ts); | |
1115 | ||
1116 | input_set_abs_params(input, ABS_MT_POSITION_X, | |
1117 | ROHM_TS_ABS_X_MIN, ROHM_TS_ABS_X_MAX, 0, 0); | |
1118 | input_set_abs_params(input, ABS_MT_POSITION_Y, | |
1119 | ROHM_TS_ABS_Y_MIN, ROHM_TS_ABS_Y_MAX, 0, 0); | |
1120 | ||
1121 | error = input_mt_init_slots(input, MAX_CONTACTS, | |
1122 | INPUT_MT_DIRECT | INPUT_MT_TRACK | | |
1123 | INPUT_MT_DROP_UNUSED); | |
1124 | if (error) { | |
1125 | dev_err(dev, "failed to multi touch slots initialization\n"); | |
1126 | return error; | |
1127 | } | |
1128 | ||
1129 | error = devm_request_threaded_irq(dev, client->irq, | |
1130 | NULL, rohm_ts_soft_irq, | |
1131 | IRQF_ONESHOT, client->name, ts); | |
1132 | if (error) { | |
1133 | dev_err(dev, "failed to request IRQ: %d\n", error); | |
1134 | return error; | |
1135 | } | |
1136 | ||
1137 | error = input_register_device(input); | |
1138 | if (error) { | |
1139 | dev_err(dev, "failed to register input device: %d\n", error); | |
1140 | return error; | |
1141 | } | |
1142 | ||
c7efd123 YY |
1143 | return error; |
1144 | } | |
1145 | ||
1146 | static const struct i2c_device_id rohm_bu21023_i2c_id[] = { | |
5852f2af | 1147 | { BU21023_NAME }, |
c7efd123 YY |
1148 | { /* sentinel */ } |
1149 | }; | |
1150 | MODULE_DEVICE_TABLE(i2c, rohm_bu21023_i2c_id); | |
1151 | ||
1152 | static struct i2c_driver rohm_bu21023_i2c_driver = { | |
1153 | .driver = { | |
1154 | .name = BU21023_NAME, | |
3837a4b9 | 1155 | .dev_groups = rohm_ts_groups, |
c7efd123 | 1156 | }, |
d8bde56d | 1157 | .probe = rohm_bu21023_i2c_probe, |
c7efd123 YY |
1158 | .id_table = rohm_bu21023_i2c_id, |
1159 | }; | |
1160 | module_i2c_driver(rohm_bu21023_i2c_driver); | |
1161 | ||
1162 | MODULE_DESCRIPTION("ROHM BU21023/24 Touchscreen driver"); | |
1163 | MODULE_LICENSE("GPL v2"); | |
1164 | MODULE_AUTHOR("ROHM Co., Ltd."); |