blob: 8342e0c48a534d5554522a136cb46550e1a06461 [file] [log] [blame]
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -05001/*
2 * drivers/input/touchscreen/tsc2007.c
3 *
4 * Copyright (c) 2008 MtekVision Co., Ltd.
5 * Kwangwoo Lee <kwlee@mtekvision.com>
6 *
7 * Using code from:
8 * - ads7846.c
9 * Copyright (c) 2005 David Brownell
10 * Copyright (c) 2006 Nokia Corporation
11 * - corgi_ts.c
12 * Copyright (C) 2004-2005 Richard Purdie
13 * - omap_ts.[hc], ads7846.h, ts_osk.c
14 * Copyright (C) 2002 MontaVista Software
15 * Copyright (C) 2004 Texas Instruments
16 * Copyright (C) 2005 Dirk Behme
17 *
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License version 2 as
20 * published by the Free Software Foundation.
21 */
22
23#include <linux/module.h>
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -050024#include <linux/slab.h>
25#include <linux/input.h>
26#include <linux/interrupt.h>
27#include <linux/i2c.h>
Denis Carikli07f9e5c2013-11-19 11:56:04 -080028#include <linux/of_device.h>
Denis Carikli07f9e5c2013-11-19 11:56:04 -080029#include <linux/of_gpio.h>
Wolfram Sang8fd70812017-05-22 16:30:04 -070030#include <linux/platform_data/tsc2007.h>
H. Nikolaus Schallerf14434042017-02-17 12:53:32 -080031#include "tsc2007.h"
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -050032
H. Nikolaus Schallerf14434042017-02-17 12:53:32 -080033int tsc2007_xfer(struct tsc2007 *tsc, u8 cmd)
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -050034{
35 s32 data;
36 u16 val;
37
38 data = i2c_smbus_read_word_data(tsc->client, cmd);
39 if (data < 0) {
40 dev_err(&tsc->client->dev, "i2c io error: %d\n", data);
41 return data;
42 }
43
44 /* The protocol and raw data format from i2c interface:
45 * S Addr Wr [A] Comm [A] S Addr Rd [A] [DataLow] A [DataHigh] NA P
46 * Where DataLow has [D11-D4], DataHigh has [D3-D0 << 4 | Dummy 4bit].
47 */
48 val = swab16(data) >> 4;
49
50 dev_dbg(&tsc->client->dev, "data: 0x%x, val: 0x%x\n", data, val);
51
52 return val;
53}
54
Dmitry Torokhovd570e9e2009-08-04 22:07:26 -070055static void tsc2007_read_values(struct tsc2007 *tsc, struct ts_event *tc)
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -050056{
Dmitry Torokhovd570e9e2009-08-04 22:07:26 -070057 /* y- still on; turn on only y+ (and ADC) */
58 tc->y = tsc2007_xfer(tsc, READ_Y);
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -050059
Dmitry Torokhovd570e9e2009-08-04 22:07:26 -070060 /* turn y- off, x+ on, then leave in lowpower */
61 tc->x = tsc2007_xfer(tsc, READ_X);
62
63 /* turn y+ off, x- on; we'll use formula #1 */
64 tc->z1 = tsc2007_xfer(tsc, READ_Z1);
65 tc->z2 = tsc2007_xfer(tsc, READ_Z2);
66
67 /* Prepare for next touch reading - power down ADC, enable PENIRQ */
68 tsc2007_xfer(tsc, PWRDOWN);
69}
70
H. Nikolaus Schallerdeec5862017-02-22 23:49:02 -080071u32 tsc2007_calculate_resistance(struct tsc2007 *tsc, struct ts_event *tc)
Dmitry Torokhovd570e9e2009-08-04 22:07:26 -070072{
73 u32 rt = 0;
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -050074
75 /* range filtering */
Dmitry Torokhovd570e9e2009-08-04 22:07:26 -070076 if (tc->x == MAX_12BIT)
77 tc->x = 0;
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -050078
Dmitry Torokhovd570e9e2009-08-04 22:07:26 -070079 if (likely(tc->x && tc->z1)) {
H. Nikolaus Schallerdeec5862017-02-22 23:49:02 -080080 /* compute touch resistance using equation #1 */
Dmitry Torokhovd570e9e2009-08-04 22:07:26 -070081 rt = tc->z2 - tc->z1;
82 rt *= tc->x;
83 rt *= tsc->x_plate_ohms;
84 rt /= tc->z1;
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -050085 rt = (rt + 2047) >> 12;
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -050086 }
87
Dmitry Torokhovd570e9e2009-08-04 22:07:26 -070088 return rt;
89}
90
H. Nikolaus Schallerf14434042017-02-17 12:53:32 -080091bool tsc2007_is_pen_down(struct tsc2007 *ts)
Dmitry Torokhovd570e9e2009-08-04 22:07:26 -070092{
Dmitry Torokhov141586bc2009-07-24 23:14:16 -070093 /*
94 * NOTE: We can't rely on the pressure to determine the pen down
Dmitry Torokhovd570e9e2009-08-04 22:07:26 -070095 * state, even though this controller has a pressure sensor.
96 * The pressure value can fluctuate for quite a while after
97 * lifting the pen and in some cases may not even settle at the
98 * expected value.
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -050099 *
100 * The only safe way to check for the pen up condition is in the
Dmitry Torokhovd570e9e2009-08-04 22:07:26 -0700101 * work function by reading the pen signal state (it's a GPIO
102 * and IRQ). Unfortunately such callback is not always available,
Dmitry Torokhov377dc552011-08-25 00:25:12 -0700103 * in that case we assume that the pen is down and expect caller
104 * to fall back on the pressure reading.
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500105 */
Dmitry Torokhovd570e9e2009-08-04 22:07:26 -0700106
Dmitry Torokhov377dc552011-08-25 00:25:12 -0700107 if (!ts->get_pendown_state)
108 return true;
Dmitry Torokhovd570e9e2009-08-04 22:07:26 -0700109
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800110 return ts->get_pendown_state(&ts->client->dev);
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500111}
112
Dmitry Torokhov377dc552011-08-25 00:25:12 -0700113static irqreturn_t tsc2007_soft_irq(int irq, void *handle)
114{
115 struct tsc2007 *ts = handle;
116 struct input_dev *input = ts->input;
117 struct ts_event tc;
118 u32 rt;
119
120 while (!ts->stopped && tsc2007_is_pen_down(ts)) {
121
122 /* pen is down, continue with the measurement */
H. Nikolaus Schallerf14434042017-02-17 12:53:32 -0800123
124 mutex_lock(&ts->mlock);
Dmitry Torokhov377dc552011-08-25 00:25:12 -0700125 tsc2007_read_values(ts, &tc);
H. Nikolaus Schallerf14434042017-02-17 12:53:32 -0800126 mutex_unlock(&ts->mlock);
Dmitry Torokhov377dc552011-08-25 00:25:12 -0700127
H. Nikolaus Schallerdeec5862017-02-22 23:49:02 -0800128 rt = tsc2007_calculate_resistance(ts, &tc);
Dmitry Torokhov377dc552011-08-25 00:25:12 -0700129
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800130 if (!rt && !ts->get_pendown_state) {
Dmitry Torokhov377dc552011-08-25 00:25:12 -0700131 /*
132 * If pressure reported is 0 and we don't have
133 * callback to check pendown state, we have to
134 * assume that pen was lifted up.
135 */
136 break;
137 }
138
139 if (rt <= ts->max_rt) {
140 dev_dbg(&ts->client->dev,
H. Nikolaus Schallerdeec5862017-02-22 23:49:02 -0800141 "DOWN point(%4d,%4d), resistance (%4u)\n",
Dmitry Torokhov377dc552011-08-25 00:25:12 -0700142 tc.x, tc.y, rt);
143
H. Nikolaus Schallerdb4572f2017-02-22 23:53:02 -0800144 rt = ts->max_rt - rt;
145
Dmitry Torokhov377dc552011-08-25 00:25:12 -0700146 input_report_key(input, BTN_TOUCH, 1);
147 input_report_abs(input, ABS_X, tc.x);
148 input_report_abs(input, ABS_Y, tc.y);
149 input_report_abs(input, ABS_PRESSURE, rt);
150
151 input_sync(input);
152
153 } else {
154 /*
155 * Sample found inconsistent by debouncing or pressure is
156 * beyond the maximum. Don't report it to user space,
157 * repeat at least once more the measurement.
158 */
159 dev_dbg(&ts->client->dev, "ignored pressure %d\n", rt);
160 }
161
Aaron Sierrabbdb38a2015-03-31 14:35:36 -0700162 wait_event_timeout(ts->wait, ts->stopped, ts->poll_period);
Dmitry Torokhov377dc552011-08-25 00:25:12 -0700163 }
164
165 dev_dbg(&ts->client->dev, "UP\n");
166
167 input_report_key(input, BTN_TOUCH, 0);
168 input_report_abs(input, ABS_PRESSURE, 0);
169 input_sync(input);
170
171 if (ts->clear_penirq)
172 ts->clear_penirq();
173
174 return IRQ_HANDLED;
175}
176
177static irqreturn_t tsc2007_hard_irq(int irq, void *handle)
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500178{
179 struct tsc2007 *ts = handle;
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500180
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800181 if (tsc2007_is_pen_down(ts))
Dmitry Torokhov377dc552011-08-25 00:25:12 -0700182 return IRQ_WAKE_THREAD;
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500183
184 if (ts->clear_penirq)
185 ts->clear_penirq();
186
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500187 return IRQ_HANDLED;
188}
189
Dmitry Torokhovd3654d72011-08-25 01:05:46 -0700190static void tsc2007_stop(struct tsc2007 *ts)
Dmitry Torokhov141586bc2009-07-24 23:14:16 -0700191{
Dmitry Torokhov377dc552011-08-25 00:25:12 -0700192 ts->stopped = true;
193 mb();
194 wake_up(&ts->wait);
Dmitry Torokhovd3654d72011-08-25 01:05:46 -0700195
196 disable_irq(ts->irq);
197}
198
199static int tsc2007_open(struct input_dev *input_dev)
200{
201 struct tsc2007 *ts = input_get_drvdata(input_dev);
202 int err;
203
204 ts->stopped = false;
205 mb();
206
207 enable_irq(ts->irq);
208
209 /* Prepare for touch readings - power down ADC and enable PENIRQ */
210 err = tsc2007_xfer(ts, PWRDOWN);
211 if (err < 0) {
212 tsc2007_stop(ts);
213 return err;
214 }
215
216 return 0;
217}
218
219static void tsc2007_close(struct input_dev *input_dev)
220{
221 struct tsc2007 *ts = input_get_drvdata(input_dev);
222
223 tsc2007_stop(ts);
Dmitry Torokhov141586bc2009-07-24 23:14:16 -0700224}
225
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800226#ifdef CONFIG_OF
227static int tsc2007_get_pendown_state_gpio(struct device *dev)
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500228{
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800229 struct i2c_client *client = to_i2c_client(dev);
230 struct tsc2007 *ts = i2c_get_clientdata(client);
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500231
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800232 return !gpio_get_value(ts->gpio);
233}
234
235static int tsc2007_probe_dt(struct i2c_client *client, struct tsc2007 *ts)
236{
237 struct device_node *np = client->dev.of_node;
238 u32 val32;
239 u64 val64;
240
241 if (!np) {
242 dev_err(&client->dev, "missing device tree data\n");
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500243 return -EINVAL;
244 }
245
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800246 if (!of_property_read_u32(np, "ti,max-rt", &val32))
247 ts->max_rt = val32;
248 else
249 ts->max_rt = MAX_12BIT;
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500250
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800251 if (!of_property_read_u32(np, "ti,fuzzx", &val32))
252 ts->fuzzx = val32;
253
254 if (!of_property_read_u32(np, "ti,fuzzy", &val32))
255 ts->fuzzy = val32;
256
257 if (!of_property_read_u32(np, "ti,fuzzz", &val32))
258 ts->fuzzz = val32;
259
260 if (!of_property_read_u64(np, "ti,poll-period", &val64))
Aaron Sierrabbdb38a2015-03-31 14:35:36 -0700261 ts->poll_period = msecs_to_jiffies(val64);
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800262 else
Aaron Sierrabbdb38a2015-03-31 14:35:36 -0700263 ts->poll_period = msecs_to_jiffies(1);
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800264
265 if (!of_property_read_u32(np, "ti,x-plate-ohms", &val32)) {
266 ts->x_plate_ohms = val32;
267 } else {
268 dev_err(&client->dev, "missing ti,x-plate-ohms devicetree property.");
269 return -EINVAL;
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500270 }
271
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800272 ts->gpio = of_get_gpio(np, 0);
273 if (gpio_is_valid(ts->gpio))
274 ts->get_pendown_state = tsc2007_get_pendown_state_gpio;
275 else
276 dev_warn(&client->dev,
277 "GPIO not specified in DT (of_get_gpio returned %d)\n",
278 ts->gpio);
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500279
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800280 return 0;
281}
282#else
283static int tsc2007_probe_dt(struct i2c_client *client, struct tsc2007 *ts)
284{
285 dev_err(&client->dev, "platform data is required!\n");
286 return -EINVAL;
287}
288#endif
289
290static int tsc2007_probe_pdev(struct i2c_client *client, struct tsc2007 *ts,
291 const struct tsc2007_platform_data *pdata,
292 const struct i2c_device_id *id)
293{
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500294 ts->model = pdata->model;
295 ts->x_plate_ohms = pdata->x_plate_ohms;
Thierry Reding84005eb2011-05-17 09:31:01 -0700296 ts->max_rt = pdata->max_rt ? : MAX_12BIT;
Aaron Sierrabbdb38a2015-03-31 14:35:36 -0700297 ts->poll_period = msecs_to_jiffies(pdata->poll_period ? : 1);
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500298 ts->get_pendown_state = pdata->get_pendown_state;
299 ts->clear_penirq = pdata->clear_penirq;
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800300 ts->fuzzx = pdata->fuzzx;
301 ts->fuzzy = pdata->fuzzy;
302 ts->fuzzz = pdata->fuzzz;
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500303
Philip Rakity341deef2011-10-11 20:54:55 -0700304 if (pdata->x_plate_ohms == 0) {
305 dev_err(&client->dev, "x_plate_ohms is not set up in platform data");
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800306 return -EINVAL;
Philip Rakity341deef2011-10-11 20:54:55 -0700307 }
308
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800309 return 0;
310}
311
Dmitry Torokhovfd91a5f2013-11-19 12:52:29 -0800312static void tsc2007_call_exit_platform_hw(void *data)
313{
314 struct device *dev = data;
315 const struct tsc2007_platform_data *pdata = dev_get_platdata(dev);
316
317 pdata->exit_platform_hw();
318}
319
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800320static int tsc2007_probe(struct i2c_client *client,
321 const struct i2c_device_id *id)
322{
H. Nikolaus Schallerf14434042017-02-17 12:53:32 -0800323 const struct tsc2007_platform_data *pdata =
324 dev_get_platdata(&client->dev);
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800325 struct tsc2007 *ts;
326 struct input_dev *input_dev;
327 int err;
328
329 if (!i2c_check_functionality(client->adapter,
330 I2C_FUNC_SMBUS_READ_WORD_DATA))
331 return -EIO;
332
333 ts = devm_kzalloc(&client->dev, sizeof(struct tsc2007), GFP_KERNEL);
334 if (!ts)
335 return -ENOMEM;
336
337 if (pdata)
338 err = tsc2007_probe_pdev(client, ts, pdata, id);
339 else
340 err = tsc2007_probe_dt(client, ts);
341 if (err)
342 return err;
343
Dmitry Torokhovfd91a5f2013-11-19 12:52:29 -0800344 input_dev = devm_input_allocate_device(&client->dev);
345 if (!input_dev)
346 return -ENOMEM;
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800347
348 i2c_set_clientdata(client, ts);
349
350 ts->client = client;
351 ts->irq = client->irq;
352 ts->input = input_dev;
H. Nikolaus Schallerf14434042017-02-17 12:53:32 -0800353
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800354 init_waitqueue_head(&ts->wait);
H. Nikolaus Schallerf14434042017-02-17 12:53:32 -0800355 mutex_init(&ts->mlock);
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800356
Kay Sievers4e8718a2009-01-29 22:56:08 -0800357 snprintf(ts->phys, sizeof(ts->phys),
358 "%s/input0", dev_name(&client->dev));
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500359
360 input_dev->name = "TSC2007 Touchscreen";
361 input_dev->phys = ts->phys;
362 input_dev->id.bustype = BUS_I2C;
363
Dmitry Torokhovd3654d72011-08-25 01:05:46 -0700364 input_dev->open = tsc2007_open;
365 input_dev->close = tsc2007_close;
366
367 input_set_drvdata(input_dev, ts);
368
Dmitry Torokhovc61ebe82017-02-17 14:51:13 -0800369 input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500370
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800371 input_set_abs_params(input_dev, ABS_X, 0, MAX_12BIT, ts->fuzzx, 0);
372 input_set_abs_params(input_dev, ABS_Y, 0, MAX_12BIT, ts->fuzzy, 0);
Thierry Reding891e3762011-05-17 09:32:29 -0700373 input_set_abs_params(input_dev, ABS_PRESSURE, 0, MAX_12BIT,
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800374 ts->fuzzz, 0);
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500375
Dmitry Torokhovfd91a5f2013-11-19 12:52:29 -0800376 if (pdata) {
377 if (pdata->exit_platform_hw) {
378 err = devm_add_action(&client->dev,
379 tsc2007_call_exit_platform_hw,
380 &client->dev);
381 if (err) {
382 dev_err(&client->dev,
383 "Failed to register exit_platform_hw action, %d\n",
384 err);
385 return err;
386 }
387 }
Richard Röjfors75fba3b2009-07-24 22:01:39 -0700388
Dmitry Torokhovfd91a5f2013-11-19 12:52:29 -0800389 if (pdata->init_platform_hw)
390 pdata->init_platform_hw();
391 }
392
393 err = devm_request_threaded_irq(&client->dev, ts->irq,
394 tsc2007_hard_irq, tsc2007_soft_irq,
395 IRQF_ONESHOT,
396 client->dev.driver->name, ts);
397 if (err) {
398 dev_err(&client->dev, "Failed to request irq %d: %d\n",
399 ts->irq, err);
400 return err;
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500401 }
402
Dmitry Torokhovd3654d72011-08-25 01:05:46 -0700403 tsc2007_stop(ts);
Richard Röjforscf5f439b2009-08-04 22:34:10 -0700404
H. Nikolaus Schaller934df232017-02-17 12:51:19 -0800405 /* power down the chip (TSC2007_SETUP does not ACK on I2C) */
406 err = tsc2007_xfer(ts, PWRDOWN);
407 if (err < 0) {
408 dev_err(&client->dev,
409 "Failed to setup chip: %d\n", err);
H. Nikolaus Schallerf14434042017-02-17 12:53:32 -0800410 return err; /* chip does not respond */
H. Nikolaus Schaller934df232017-02-17 12:51:19 -0800411 }
412
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500413 err = input_register_device(input_dev);
Dmitry Torokhovfd91a5f2013-11-19 12:52:29 -0800414 if (err) {
415 dev_err(&client->dev,
416 "Failed to register input device: %d\n", err);
417 return err;
418 }
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500419
H. Nikolaus Schallerf14434042017-02-17 12:53:32 -0800420 err = tsc2007_iio_configure(ts);
421 if (err) {
422 dev_err(&client->dev,
423 "Failed to register with IIO: %d\n", err);
424 return err;
425 }
426
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500427 return 0;
428}
429
Márton Némethce7b39a2010-01-09 23:23:02 -0800430static const struct i2c_device_id tsc2007_idtable[] = {
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500431 { "tsc2007", 0 },
432 { }
433};
434
435MODULE_DEVICE_TABLE(i2c, tsc2007_idtable);
436
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800437#ifdef CONFIG_OF
438static const struct of_device_id tsc2007_of_match[] = {
439 { .compatible = "ti,tsc2007" },
440 { /* sentinel */ }
441};
442MODULE_DEVICE_TABLE(of, tsc2007_of_match);
443#endif
444
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500445static struct i2c_driver tsc2007_driver = {
446 .driver = {
Denis Carikli07f9e5c2013-11-19 11:56:04 -0800447 .name = "tsc2007",
448 .of_match_table = of_match_ptr(tsc2007_of_match),
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500449 },
450 .id_table = tsc2007_idtable,
451 .probe = tsc2007_probe,
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500452};
453
Axel Lin1b92c1c2012-03-16 23:05:41 -0700454module_i2c_driver(tsc2007_driver);
Kwangwoo Lee50b6f1f2008-12-20 04:26:01 -0500455
456MODULE_AUTHOR("Kwangwoo Lee <kwlee@mtekvision.com>");
457MODULE_DESCRIPTION("TSC2007 TouchScreen Driver");
458MODULE_LICENSE("GPL");