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07b8481d JS |
1 | /* |
2 | * Copyright (C) 2012 Samsung Electronics Co.Ltd | |
3 | * Author: Joonyoung Shim <jy0922.shim@samsung.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | */ | |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/delay.h> | |
ad5396ee | 13 | #include <linux/of.h> |
07b8481d JS |
14 | #include <linux/i2c.h> |
15 | #include <linux/i2c/mms114.h> | |
16 | #include <linux/input/mt.h> | |
17 | #include <linux/interrupt.h> | |
18 | #include <linux/regulator/consumer.h> | |
19 | #include <linux/slab.h> | |
20 | ||
21 | /* Write only registers */ | |
22 | #define MMS114_MODE_CONTROL 0x01 | |
23 | #define MMS114_OPERATION_MODE_MASK 0xE | |
24 | #define MMS114_ACTIVE (1 << 1) | |
25 | ||
26 | #define MMS114_XY_RESOLUTION_H 0x02 | |
27 | #define MMS114_X_RESOLUTION 0x03 | |
28 | #define MMS114_Y_RESOLUTION 0x04 | |
29 | #define MMS114_CONTACT_THRESHOLD 0x05 | |
30 | #define MMS114_MOVING_THRESHOLD 0x06 | |
31 | ||
32 | /* Read only registers */ | |
33 | #define MMS114_PACKET_SIZE 0x0F | |
34 | #define MMS114_INFOMATION 0x10 | |
35 | #define MMS114_TSP_REV 0xF0 | |
36 | ||
37 | /* Minimum delay time is 50us between stop and start signal of i2c */ | |
38 | #define MMS114_I2C_DELAY 50 | |
39 | ||
40 | /* 200ms needs after power on */ | |
41 | #define MMS114_POWERON_DELAY 200 | |
42 | ||
43 | /* Touchscreen absolute values */ | |
44 | #define MMS114_MAX_AREA 0xff | |
45 | ||
46 | #define MMS114_MAX_TOUCH 10 | |
47 | #define MMS114_PACKET_NUM 8 | |
48 | ||
49 | /* Touch type */ | |
50 | #define MMS114_TYPE_NONE 0 | |
51 | #define MMS114_TYPE_TOUCHSCREEN 1 | |
52 | #define MMS114_TYPE_TOUCHKEY 2 | |
53 | ||
54 | struct mms114_data { | |
55 | struct i2c_client *client; | |
56 | struct input_dev *input_dev; | |
57 | struct regulator *core_reg; | |
58 | struct regulator *io_reg; | |
59 | const struct mms114_platform_data *pdata; | |
60 | ||
61 | /* Use cache data for mode control register(write only) */ | |
62 | u8 cache_mode_control; | |
63 | }; | |
64 | ||
65 | struct mms114_touch { | |
66 | u8 id:4, reserved_bit4:1, type:2, pressed:1; | |
67 | u8 x_hi:4, y_hi:4; | |
68 | u8 x_lo; | |
69 | u8 y_lo; | |
70 | u8 width; | |
71 | u8 strength; | |
72 | u8 reserved[2]; | |
73 | } __packed; | |
74 | ||
75 | static int __mms114_read_reg(struct mms114_data *data, unsigned int reg, | |
76 | unsigned int len, u8 *val) | |
77 | { | |
78 | struct i2c_client *client = data->client; | |
79 | struct i2c_msg xfer[2]; | |
80 | u8 buf = reg & 0xff; | |
81 | int error; | |
82 | ||
83 | if (reg <= MMS114_MODE_CONTROL && reg + len > MMS114_MODE_CONTROL) | |
84 | BUG(); | |
85 | ||
86 | /* Write register: use repeated start */ | |
87 | xfer[0].addr = client->addr; | |
88 | xfer[0].flags = I2C_M_TEN | I2C_M_NOSTART; | |
89 | xfer[0].len = 1; | |
90 | xfer[0].buf = &buf; | |
91 | ||
92 | /* Read data */ | |
93 | xfer[1].addr = client->addr; | |
94 | xfer[1].flags = I2C_M_RD; | |
95 | xfer[1].len = len; | |
96 | xfer[1].buf = val; | |
97 | ||
98 | error = i2c_transfer(client->adapter, xfer, 2); | |
99 | if (error != 2) { | |
100 | dev_err(&client->dev, | |
101 | "%s: i2c transfer failed (%d)\n", __func__, error); | |
102 | return error < 0 ? error : -EIO; | |
103 | } | |
104 | udelay(MMS114_I2C_DELAY); | |
105 | ||
106 | return 0; | |
107 | } | |
108 | ||
109 | static int mms114_read_reg(struct mms114_data *data, unsigned int reg) | |
110 | { | |
111 | u8 val; | |
112 | int error; | |
113 | ||
114 | if (reg == MMS114_MODE_CONTROL) | |
115 | return data->cache_mode_control; | |
116 | ||
117 | error = __mms114_read_reg(data, reg, 1, &val); | |
118 | return error < 0 ? error : val; | |
119 | } | |
120 | ||
121 | static int mms114_write_reg(struct mms114_data *data, unsigned int reg, | |
122 | unsigned int val) | |
123 | { | |
124 | struct i2c_client *client = data->client; | |
125 | u8 buf[2]; | |
126 | int error; | |
127 | ||
128 | buf[0] = reg & 0xff; | |
129 | buf[1] = val & 0xff; | |
130 | ||
131 | error = i2c_master_send(client, buf, 2); | |
132 | if (error != 2) { | |
133 | dev_err(&client->dev, | |
134 | "%s: i2c send failed (%d)\n", __func__, error); | |
135 | return error < 0 ? error : -EIO; | |
136 | } | |
137 | udelay(MMS114_I2C_DELAY); | |
138 | ||
139 | if (reg == MMS114_MODE_CONTROL) | |
140 | data->cache_mode_control = val; | |
141 | ||
142 | return 0; | |
143 | } | |
144 | ||
145 | static void mms114_process_mt(struct mms114_data *data, struct mms114_touch *touch) | |
146 | { | |
147 | const struct mms114_platform_data *pdata = data->pdata; | |
148 | struct i2c_client *client = data->client; | |
149 | struct input_dev *input_dev = data->input_dev; | |
150 | unsigned int id; | |
151 | unsigned int x; | |
152 | unsigned int y; | |
153 | ||
154 | if (touch->id > MMS114_MAX_TOUCH) { | |
155 | dev_err(&client->dev, "Wrong touch id (%d)\n", touch->id); | |
156 | return; | |
157 | } | |
158 | ||
159 | if (touch->type != MMS114_TYPE_TOUCHSCREEN) { | |
160 | dev_err(&client->dev, "Wrong touch type (%d)\n", touch->type); | |
161 | return; | |
162 | } | |
163 | ||
164 | id = touch->id - 1; | |
165 | x = touch->x_lo | touch->x_hi << 8; | |
166 | y = touch->y_lo | touch->y_hi << 8; | |
167 | if (x > pdata->x_size || y > pdata->y_size) { | |
168 | dev_dbg(&client->dev, | |
169 | "Wrong touch coordinates (%d, %d)\n", x, y); | |
170 | return; | |
171 | } | |
172 | ||
173 | if (pdata->x_invert) | |
174 | x = pdata->x_size - x; | |
175 | if (pdata->y_invert) | |
176 | y = pdata->y_size - y; | |
177 | ||
178 | dev_dbg(&client->dev, | |
179 | "id: %d, type: %d, pressed: %d, x: %d, y: %d, width: %d, strength: %d\n", | |
180 | id, touch->type, touch->pressed, | |
181 | x, y, touch->width, touch->strength); | |
182 | ||
183 | input_mt_slot(input_dev, id); | |
184 | input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, touch->pressed); | |
185 | ||
186 | if (touch->pressed) { | |
187 | input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, touch->width); | |
188 | input_report_abs(input_dev, ABS_MT_POSITION_X, x); | |
189 | input_report_abs(input_dev, ABS_MT_POSITION_Y, y); | |
190 | input_report_abs(input_dev, ABS_MT_PRESSURE, touch->strength); | |
191 | } | |
192 | } | |
193 | ||
194 | static irqreturn_t mms114_interrupt(int irq, void *dev_id) | |
195 | { | |
196 | struct mms114_data *data = dev_id; | |
197 | struct input_dev *input_dev = data->input_dev; | |
198 | struct mms114_touch touch[MMS114_MAX_TOUCH]; | |
199 | int packet_size; | |
200 | int touch_size; | |
201 | int index; | |
202 | int error; | |
203 | ||
204 | mutex_lock(&input_dev->mutex); | |
205 | if (!input_dev->users) { | |
206 | mutex_unlock(&input_dev->mutex); | |
207 | goto out; | |
208 | } | |
209 | mutex_unlock(&input_dev->mutex); | |
210 | ||
211 | packet_size = mms114_read_reg(data, MMS114_PACKET_SIZE); | |
212 | if (packet_size <= 0) | |
213 | goto out; | |
214 | ||
215 | touch_size = packet_size / MMS114_PACKET_NUM; | |
216 | ||
217 | error = __mms114_read_reg(data, MMS114_INFOMATION, packet_size, | |
218 | (u8 *)touch); | |
219 | if (error < 0) | |
220 | goto out; | |
221 | ||
222 | for (index = 0; index < touch_size; index++) | |
223 | mms114_process_mt(data, touch + index); | |
224 | ||
225 | input_mt_report_pointer_emulation(data->input_dev, true); | |
226 | input_sync(data->input_dev); | |
227 | ||
228 | out: | |
229 | return IRQ_HANDLED; | |
230 | } | |
231 | ||
232 | static int mms114_set_active(struct mms114_data *data, bool active) | |
233 | { | |
234 | int val; | |
235 | ||
236 | val = mms114_read_reg(data, MMS114_MODE_CONTROL); | |
237 | if (val < 0) | |
238 | return val; | |
239 | ||
240 | val &= ~MMS114_OPERATION_MODE_MASK; | |
241 | ||
242 | /* If active is false, sleep mode */ | |
243 | if (active) | |
244 | val |= MMS114_ACTIVE; | |
245 | ||
246 | return mms114_write_reg(data, MMS114_MODE_CONTROL, val); | |
247 | } | |
248 | ||
249 | static int mms114_get_version(struct mms114_data *data) | |
250 | { | |
251 | struct device *dev = &data->client->dev; | |
252 | u8 buf[6]; | |
253 | int error; | |
254 | ||
255 | error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf); | |
256 | if (error < 0) | |
257 | return error; | |
258 | ||
259 | dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n", | |
260 | buf[0], buf[1], buf[3]); | |
261 | ||
262 | return 0; | |
263 | } | |
264 | ||
265 | static int mms114_setup_regs(struct mms114_data *data) | |
266 | { | |
267 | const struct mms114_platform_data *pdata = data->pdata; | |
268 | int val; | |
269 | int error; | |
270 | ||
271 | error = mms114_get_version(data); | |
272 | if (error < 0) | |
273 | return error; | |
274 | ||
275 | error = mms114_set_active(data, true); | |
276 | if (error < 0) | |
277 | return error; | |
278 | ||
279 | val = (pdata->x_size >> 8) & 0xf; | |
280 | val |= ((pdata->y_size >> 8) & 0xf) << 4; | |
281 | error = mms114_write_reg(data, MMS114_XY_RESOLUTION_H, val); | |
282 | if (error < 0) | |
283 | return error; | |
284 | ||
285 | val = pdata->x_size & 0xff; | |
286 | error = mms114_write_reg(data, MMS114_X_RESOLUTION, val); | |
287 | if (error < 0) | |
288 | return error; | |
289 | ||
290 | val = pdata->y_size & 0xff; | |
291 | error = mms114_write_reg(data, MMS114_Y_RESOLUTION, val); | |
292 | if (error < 0) | |
293 | return error; | |
294 | ||
295 | if (pdata->contact_threshold) { | |
296 | error = mms114_write_reg(data, MMS114_CONTACT_THRESHOLD, | |
297 | pdata->contact_threshold); | |
298 | if (error < 0) | |
299 | return error; | |
300 | } | |
301 | ||
302 | if (pdata->moving_threshold) { | |
303 | error = mms114_write_reg(data, MMS114_MOVING_THRESHOLD, | |
304 | pdata->moving_threshold); | |
305 | if (error < 0) | |
306 | return error; | |
307 | } | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
312 | static int mms114_start(struct mms114_data *data) | |
313 | { | |
314 | struct i2c_client *client = data->client; | |
315 | int error; | |
316 | ||
317 | if (data->core_reg) | |
318 | regulator_enable(data->core_reg); | |
319 | if (data->io_reg) | |
320 | regulator_enable(data->io_reg); | |
321 | mdelay(MMS114_POWERON_DELAY); | |
322 | ||
323 | error = mms114_setup_regs(data); | |
324 | if (error < 0) | |
325 | return error; | |
326 | ||
327 | if (data->pdata->cfg_pin) | |
328 | data->pdata->cfg_pin(true); | |
329 | ||
330 | enable_irq(client->irq); | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
335 | static void mms114_stop(struct mms114_data *data) | |
336 | { | |
337 | struct i2c_client *client = data->client; | |
338 | ||
339 | disable_irq(client->irq); | |
340 | ||
341 | if (data->pdata->cfg_pin) | |
342 | data->pdata->cfg_pin(false); | |
343 | ||
344 | if (data->io_reg) | |
345 | regulator_disable(data->io_reg); | |
346 | if (data->core_reg) | |
347 | regulator_disable(data->core_reg); | |
348 | } | |
349 | ||
350 | static int mms114_input_open(struct input_dev *dev) | |
351 | { | |
352 | struct mms114_data *data = input_get_drvdata(dev); | |
353 | ||
354 | return mms114_start(data); | |
355 | } | |
356 | ||
357 | static void mms114_input_close(struct input_dev *dev) | |
358 | { | |
359 | struct mms114_data *data = input_get_drvdata(dev); | |
360 | ||
361 | mms114_stop(data); | |
362 | } | |
363 | ||
ad5396ee | 364 | #ifdef CONFIG_OF |
5298cc4c | 365 | static struct mms114_platform_data *mms114_parse_dt(struct device *dev) |
ad5396ee TF |
366 | { |
367 | struct mms114_platform_data *pdata; | |
368 | struct device_node *np = dev->of_node; | |
369 | ||
370 | if (!np) | |
371 | return NULL; | |
372 | ||
373 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
374 | if (!pdata) { | |
375 | dev_err(dev, "failed to allocate platform data\n"); | |
376 | return NULL; | |
377 | } | |
378 | ||
379 | if (of_property_read_u32(np, "x-size", &pdata->x_size)) { | |
380 | dev_err(dev, "failed to get x-size property\n"); | |
381 | return NULL; | |
382 | }; | |
383 | ||
384 | if (of_property_read_u32(np, "y-size", &pdata->y_size)) { | |
385 | dev_err(dev, "failed to get y-size property\n"); | |
386 | return NULL; | |
387 | }; | |
388 | ||
389 | of_property_read_u32(np, "contact-threshold", | |
390 | &pdata->contact_threshold); | |
391 | of_property_read_u32(np, "moving-threshold", | |
392 | &pdata->moving_threshold); | |
393 | ||
394 | if (of_find_property(np, "x-invert", NULL)) | |
395 | pdata->x_invert = true; | |
396 | if (of_find_property(np, "y-invert", NULL)) | |
397 | pdata->y_invert = true; | |
398 | ||
399 | return pdata; | |
400 | } | |
401 | #else | |
402 | static inline struct mms114_platform_data *mms114_parse_dt(struct device *dev) | |
403 | { | |
404 | return NULL; | |
405 | } | |
406 | #endif | |
407 | ||
5298cc4c | 408 | static int mms114_probe(struct i2c_client *client, |
07b8481d JS |
409 | const struct i2c_device_id *id) |
410 | { | |
ad5396ee | 411 | const struct mms114_platform_data *pdata; |
07b8481d JS |
412 | struct mms114_data *data; |
413 | struct input_dev *input_dev; | |
414 | int error; | |
415 | ||
ad5396ee TF |
416 | pdata = dev_get_platdata(&client->dev); |
417 | if (!pdata) | |
418 | pdata = mms114_parse_dt(&client->dev); | |
419 | ||
420 | if (!pdata) { | |
07b8481d JS |
421 | dev_err(&client->dev, "Need platform data\n"); |
422 | return -EINVAL; | |
423 | } | |
424 | ||
425 | if (!i2c_check_functionality(client->adapter, | |
426 | I2C_FUNC_PROTOCOL_MANGLING)) { | |
427 | dev_err(&client->dev, | |
428 | "Need i2c bus that supports protocol mangling\n"); | |
429 | return -ENODEV; | |
430 | } | |
431 | ||
432 | data = kzalloc(sizeof(struct mms114_data), GFP_KERNEL); | |
433 | input_dev = input_allocate_device(); | |
434 | if (!data || !input_dev) { | |
435 | dev_err(&client->dev, "Failed to allocate memory\n"); | |
436 | error = -ENOMEM; | |
437 | goto err_free_mem; | |
438 | } | |
439 | ||
440 | data->client = client; | |
441 | data->input_dev = input_dev; | |
ad5396ee | 442 | data->pdata = pdata; |
07b8481d JS |
443 | |
444 | input_dev->name = "MELPAS MMS114 Touchscreen"; | |
445 | input_dev->id.bustype = BUS_I2C; | |
446 | input_dev->dev.parent = &client->dev; | |
447 | input_dev->open = mms114_input_open; | |
448 | input_dev->close = mms114_input_close; | |
449 | ||
450 | __set_bit(EV_ABS, input_dev->evbit); | |
451 | __set_bit(EV_KEY, input_dev->evbit); | |
452 | __set_bit(BTN_TOUCH, input_dev->keybit); | |
453 | input_set_abs_params(input_dev, ABS_X, 0, data->pdata->x_size, 0, 0); | |
454 | input_set_abs_params(input_dev, ABS_Y, 0, data->pdata->y_size, 0, 0); | |
455 | ||
456 | /* For multi touch */ | |
b4adbbef | 457 | input_mt_init_slots(input_dev, MMS114_MAX_TOUCH, 0); |
07b8481d JS |
458 | input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, |
459 | 0, MMS114_MAX_AREA, 0, 0); | |
460 | input_set_abs_params(input_dev, ABS_MT_POSITION_X, | |
461 | 0, data->pdata->x_size, 0, 0); | |
462 | input_set_abs_params(input_dev, ABS_MT_POSITION_Y, | |
463 | 0, data->pdata->y_size, 0, 0); | |
464 | input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0); | |
465 | ||
466 | input_set_drvdata(input_dev, data); | |
467 | i2c_set_clientdata(client, data); | |
468 | ||
469 | data->core_reg = regulator_get(&client->dev, "avdd"); | |
470 | if (IS_ERR(data->core_reg)) { | |
471 | error = PTR_ERR(data->core_reg); | |
472 | dev_err(&client->dev, | |
473 | "Unable to get the Core regulator (%d)\n", error); | |
474 | goto err_free_mem; | |
475 | } | |
476 | ||
477 | data->io_reg = regulator_get(&client->dev, "vdd"); | |
478 | if (IS_ERR(data->io_reg)) { | |
479 | error = PTR_ERR(data->io_reg); | |
480 | dev_err(&client->dev, | |
481 | "Unable to get the IO regulator (%d)\n", error); | |
482 | goto err_core_reg; | |
483 | } | |
484 | ||
485 | error = request_threaded_irq(client->irq, NULL, mms114_interrupt, | |
486 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, "mms114", data); | |
487 | if (error) { | |
488 | dev_err(&client->dev, "Failed to register interrupt\n"); | |
489 | goto err_io_reg; | |
490 | } | |
491 | disable_irq(client->irq); | |
492 | ||
493 | error = input_register_device(data->input_dev); | |
494 | if (error) | |
495 | goto err_free_irq; | |
496 | ||
497 | return 0; | |
498 | ||
499 | err_free_irq: | |
500 | free_irq(client->irq, data); | |
501 | err_io_reg: | |
502 | regulator_put(data->io_reg); | |
503 | err_core_reg: | |
504 | regulator_put(data->core_reg); | |
505 | err_free_mem: | |
506 | input_free_device(input_dev); | |
507 | kfree(data); | |
508 | return error; | |
509 | } | |
510 | ||
511 | static int __devexit mms114_remove(struct i2c_client *client) | |
512 | { | |
513 | struct mms114_data *data = i2c_get_clientdata(client); | |
514 | ||
515 | free_irq(client->irq, data); | |
516 | regulator_put(data->io_reg); | |
517 | regulator_put(data->core_reg); | |
518 | input_unregister_device(data->input_dev); | |
519 | kfree(data); | |
520 | ||
521 | return 0; | |
522 | } | |
523 | ||
524 | #ifdef CONFIG_PM_SLEEP | |
525 | static int mms114_suspend(struct device *dev) | |
526 | { | |
527 | struct i2c_client *client = to_i2c_client(dev); | |
528 | struct mms114_data *data = i2c_get_clientdata(client); | |
529 | struct input_dev *input_dev = data->input_dev; | |
530 | int id; | |
531 | ||
532 | /* Release all touch */ | |
533 | for (id = 0; id < MMS114_MAX_TOUCH; id++) { | |
534 | input_mt_slot(input_dev, id); | |
535 | input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, false); | |
536 | } | |
537 | ||
538 | input_mt_report_pointer_emulation(input_dev, true); | |
539 | input_sync(input_dev); | |
540 | ||
541 | mutex_lock(&input_dev->mutex); | |
542 | if (input_dev->users) | |
543 | mms114_stop(data); | |
544 | mutex_unlock(&input_dev->mutex); | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | static int mms114_resume(struct device *dev) | |
550 | { | |
551 | struct i2c_client *client = to_i2c_client(dev); | |
552 | struct mms114_data *data = i2c_get_clientdata(client); | |
553 | struct input_dev *input_dev = data->input_dev; | |
554 | int error; | |
555 | ||
556 | mutex_lock(&input_dev->mutex); | |
557 | if (input_dev->users) { | |
558 | error = mms114_start(data); | |
559 | if (error < 0) { | |
560 | mutex_unlock(&input_dev->mutex); | |
561 | return error; | |
562 | } | |
563 | } | |
564 | mutex_unlock(&input_dev->mutex); | |
565 | ||
566 | return 0; | |
567 | } | |
568 | #endif | |
569 | ||
570 | static SIMPLE_DEV_PM_OPS(mms114_pm_ops, mms114_suspend, mms114_resume); | |
571 | ||
572 | static const struct i2c_device_id mms114_id[] = { | |
573 | { "mms114", 0 }, | |
574 | { } | |
575 | }; | |
576 | MODULE_DEVICE_TABLE(i2c, mms114_id); | |
577 | ||
ad5396ee | 578 | #ifdef CONFIG_OF |
d6f6dfd9 | 579 | static struct of_device_id mms114_dt_match[] = { |
ad5396ee TF |
580 | { .compatible = "melfas,mms114" }, |
581 | { } | |
582 | }; | |
583 | #endif | |
584 | ||
07b8481d JS |
585 | static struct i2c_driver mms114_driver = { |
586 | .driver = { | |
587 | .name = "mms114", | |
588 | .owner = THIS_MODULE, | |
589 | .pm = &mms114_pm_ops, | |
ad5396ee | 590 | .of_match_table = of_match_ptr(mms114_dt_match), |
07b8481d JS |
591 | }, |
592 | .probe = mms114_probe, | |
1cb0aa88 | 593 | .remove = mms114_remove, |
07b8481d JS |
594 | .id_table = mms114_id, |
595 | }; | |
596 | ||
597 | module_i2c_driver(mms114_driver); | |
598 | ||
599 | /* Module information */ | |
600 | MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); | |
601 | MODULE_DESCRIPTION("MELFAS mms114 Touchscreen driver"); | |
602 | MODULE_LICENSE("GPL"); |