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Input: adp5588-keypad - fix NULL dereference in adp5588_gpio_add()
[deliverable/linux.git] / drivers / input / keyboard / adp5588-keys.c
1 /*
2 * File: drivers/input/keyboard/adp5588_keys.c
3 * Description: keypad driver for ADP5588 and ADP5587
4 * I2C QWERTY Keypad and IO Expander
5 * Bugs: Enter bugs at http://blackfin.uclinux.org/
6 *
7 * Copyright (C) 2008-2009 Analog Devices Inc.
8 * Licensed under the GPL-2 or later.
9 */
10
11 #include <linux/module.h>
12 #include <linux/version.h>
13 #include <linux/init.h>
14 #include <linux/interrupt.h>
15 #include <linux/irq.h>
16 #include <linux/workqueue.h>
17 #include <linux/errno.h>
18 #include <linux/pm.h>
19 #include <linux/platform_device.h>
20 #include <linux/input.h>
21 #include <linux/i2c.h>
22 #include <linux/gpio.h>
23 #include <linux/slab.h>
24
25 #include <linux/i2c/adp5588.h>
26
27 /* Configuration Register1 */
28 #define AUTO_INC (1 << 7)
29 #define GPIEM_CFG (1 << 6)
30 #define OVR_FLOW_M (1 << 5)
31 #define INT_CFG (1 << 4)
32 #define OVR_FLOW_IEN (1 << 3)
33 #define K_LCK_IM (1 << 2)
34 #define GPI_IEN (1 << 1)
35 #define KE_IEN (1 << 0)
36
37 /* Interrupt Status Register */
38 #define CMP2_INT (1 << 5)
39 #define CMP1_INT (1 << 4)
40 #define OVR_FLOW_INT (1 << 3)
41 #define K_LCK_INT (1 << 2)
42 #define GPI_INT (1 << 1)
43 #define KE_INT (1 << 0)
44
45 /* Key Lock and Event Counter Register */
46 #define K_LCK_EN (1 << 6)
47 #define LCK21 0x30
48 #define KEC 0xF
49
50 /* Key Event Register xy */
51 #define KEY_EV_PRESSED (1 << 7)
52 #define KEY_EV_MASK (0x7F)
53
54 #define KP_SEL(x) (0xFFFF >> (16 - x)) /* 2^x-1 */
55
56 #define KEYP_MAX_EVENT 10
57
58 #define MAXGPIO 18
59 #define ADP_BANK(offs) ((offs) >> 3)
60 #define ADP_BIT(offs) (1u << ((offs) & 0x7))
61
62 /*
63 * Early pre 4.0 Silicon required to delay readout by at least 25ms,
64 * since the Event Counter Register updated 25ms after the interrupt
65 * asserted.
66 */
67 #define WA_DELAYED_READOUT_REVID(rev) ((rev) < 4)
68
69 struct adp5588_kpad {
70 struct i2c_client *client;
71 struct input_dev *input;
72 struct delayed_work work;
73 unsigned long delay;
74 unsigned short keycode[ADP5588_KEYMAPSIZE];
75 const struct adp5588_gpi_map *gpimap;
76 unsigned short gpimapsize;
77 #ifdef CONFIG_GPIOLIB
78 unsigned char gpiomap[MAXGPIO];
79 bool export_gpio;
80 struct gpio_chip gc;
81 struct mutex gpio_lock; /* Protect cached dir, dat_out */
82 u8 dat_out[3];
83 u8 dir[3];
84 #endif
85 };
86
87 static int adp5588_read(struct i2c_client *client, u8 reg)
88 {
89 int ret = i2c_smbus_read_byte_data(client, reg);
90
91 if (ret < 0)
92 dev_err(&client->dev, "Read Error\n");
93
94 return ret;
95 }
96
97 static int adp5588_write(struct i2c_client *client, u8 reg, u8 val)
98 {
99 return i2c_smbus_write_byte_data(client, reg, val);
100 }
101
102 #ifdef CONFIG_GPIOLIB
103 static int adp5588_gpio_get_value(struct gpio_chip *chip, unsigned off)
104 {
105 struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
106 unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
107 unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
108
109 return !!(adp5588_read(kpad->client, GPIO_DAT_STAT1 + bank) & bit);
110 }
111
112 static void adp5588_gpio_set_value(struct gpio_chip *chip,
113 unsigned off, int val)
114 {
115 struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
116 unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
117 unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
118
119 mutex_lock(&kpad->gpio_lock);
120
121 if (val)
122 kpad->dat_out[bank] |= bit;
123 else
124 kpad->dat_out[bank] &= ~bit;
125
126 adp5588_write(kpad->client, GPIO_DAT_OUT1 + bank,
127 kpad->dat_out[bank]);
128
129 mutex_unlock(&kpad->gpio_lock);
130 }
131
132 static int adp5588_gpio_direction_input(struct gpio_chip *chip, unsigned off)
133 {
134 struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
135 unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
136 unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
137 int ret;
138
139 mutex_lock(&kpad->gpio_lock);
140
141 kpad->dir[bank] &= ~bit;
142 ret = adp5588_write(kpad->client, GPIO_DIR1 + bank, kpad->dir[bank]);
143
144 mutex_unlock(&kpad->gpio_lock);
145
146 return ret;
147 }
148
149 static int adp5588_gpio_direction_output(struct gpio_chip *chip,
150 unsigned off, int val)
151 {
152 struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
153 unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
154 unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
155 int ret;
156
157 mutex_lock(&kpad->gpio_lock);
158
159 kpad->dir[bank] |= bit;
160
161 if (val)
162 kpad->dat_out[bank] |= bit;
163 else
164 kpad->dat_out[bank] &= ~bit;
165
166 ret = adp5588_write(kpad->client, GPIO_DAT_OUT1 + bank,
167 kpad->dat_out[bank]);
168 ret |= adp5588_write(kpad->client, GPIO_DIR1 + bank,
169 kpad->dir[bank]);
170
171 mutex_unlock(&kpad->gpio_lock);
172
173 return ret;
174 }
175
176 static int __devinit adp5588_build_gpiomap(struct adp5588_kpad *kpad,
177 const struct adp5588_kpad_platform_data *pdata)
178 {
179 bool pin_used[MAXGPIO];
180 int n_unused = 0;
181 int i;
182
183 memset(pin_used, 0, sizeof(pin_used));
184
185 for (i = 0; i < pdata->rows; i++)
186 pin_used[i] = true;
187
188 for (i = 0; i < pdata->cols; i++)
189 pin_used[i + GPI_PIN_COL_BASE - GPI_PIN_BASE] = true;
190
191 for (i = 0; i < kpad->gpimapsize; i++)
192 pin_used[kpad->gpimap[i].pin - GPI_PIN_BASE] = true;
193
194 for (i = 0; i < MAXGPIO; i++)
195 if (!pin_used[i])
196 kpad->gpiomap[n_unused++] = i;
197
198 return n_unused;
199 }
200
201 static int __devinit adp5588_gpio_add(struct adp5588_kpad *kpad)
202 {
203 struct device *dev = &kpad->client->dev;
204 const struct adp5588_kpad_platform_data *pdata = dev->platform_data;
205 const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
206 int i, error;
207
208 if (!gpio_data)
209 return 0;
210
211 kpad->gc.ngpio = adp5588_build_gpiomap(kpad, pdata);
212 if (kpad->gc.ngpio == 0) {
213 dev_info(dev, "No unused gpios left to export\n");
214 return 0;
215 }
216
217 kpad->export_gpio = true;
218
219 kpad->gc.direction_input = adp5588_gpio_direction_input;
220 kpad->gc.direction_output = adp5588_gpio_direction_output;
221 kpad->gc.get = adp5588_gpio_get_value;
222 kpad->gc.set = adp5588_gpio_set_value;
223 kpad->gc.can_sleep = 1;
224
225 kpad->gc.base = gpio_data->gpio_start;
226 kpad->gc.label = kpad->client->name;
227 kpad->gc.owner = THIS_MODULE;
228
229 mutex_init(&kpad->gpio_lock);
230
231 error = gpiochip_add(&kpad->gc);
232 if (error) {
233 dev_err(dev, "gpiochip_add failed, err: %d\n", error);
234 return error;
235 }
236
237 for (i = 0; i <= ADP_BANK(MAXGPIO); i++) {
238 kpad->dat_out[i] = adp5588_read(kpad->client,
239 GPIO_DAT_OUT1 + i);
240 kpad->dir[i] = adp5588_read(kpad->client, GPIO_DIR1 + i);
241 }
242
243 if (gpio_data->setup) {
244 error = gpio_data->setup(kpad->client,
245 kpad->gc.base, kpad->gc.ngpio,
246 gpio_data->context);
247 if (error)
248 dev_warn(dev, "setup failed, %d\n", error);
249 }
250
251 return 0;
252 }
253
254 static void __devexit adp5588_gpio_remove(struct adp5588_kpad *kpad)
255 {
256 struct device *dev = &kpad->client->dev;
257 const struct adp5588_kpad_platform_data *pdata = dev->platform_data;
258 const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
259 int error;
260
261 if (!kpad->export_gpio)
262 return;
263
264 if (gpio_data->teardown) {
265 error = gpio_data->teardown(kpad->client,
266 kpad->gc.base, kpad->gc.ngpio,
267 gpio_data->context);
268 if (error)
269 dev_warn(dev, "teardown failed %d\n", error);
270 }
271
272 error = gpiochip_remove(&kpad->gc);
273 if (error)
274 dev_warn(dev, "gpiochip_remove failed %d\n", error);
275 }
276 #else
277 static inline int adp5588_gpio_add(struct adp5588_kpad *kpad)
278 {
279 return 0;
280 }
281
282 static inline void adp5588_gpio_remove(struct adp5588_kpad *kpad)
283 {
284 }
285 #endif
286
287 static void adp5588_report_events(struct adp5588_kpad *kpad, int ev_cnt)
288 {
289 int i, j;
290
291 for (i = 0; i < ev_cnt; i++) {
292 int key = adp5588_read(kpad->client, Key_EVENTA + i);
293 int key_val = key & KEY_EV_MASK;
294
295 if (key_val >= GPI_PIN_BASE && key_val <= GPI_PIN_END) {
296 for (j = 0; j < kpad->gpimapsize; j++) {
297 if (key_val == kpad->gpimap[j].pin) {
298 input_report_switch(kpad->input,
299 kpad->gpimap[j].sw_evt,
300 key & KEY_EV_PRESSED);
301 break;
302 }
303 }
304 } else {
305 input_report_key(kpad->input,
306 kpad->keycode[key_val - 1],
307 key & KEY_EV_PRESSED);
308 }
309 }
310 }
311
312 static void adp5588_work(struct work_struct *work)
313 {
314 struct adp5588_kpad *kpad = container_of(work,
315 struct adp5588_kpad, work.work);
316 struct i2c_client *client = kpad->client;
317 int status, ev_cnt;
318
319 status = adp5588_read(client, INT_STAT);
320
321 if (status & OVR_FLOW_INT) /* Unlikely and should never happen */
322 dev_err(&client->dev, "Event Overflow Error\n");
323
324 if (status & KE_INT) {
325 ev_cnt = adp5588_read(client, KEY_LCK_EC_STAT) & KEC;
326 if (ev_cnt) {
327 adp5588_report_events(kpad, ev_cnt);
328 input_sync(kpad->input);
329 }
330 }
331 adp5588_write(client, INT_STAT, status); /* Status is W1C */
332 }
333
334 static irqreturn_t adp5588_irq(int irq, void *handle)
335 {
336 struct adp5588_kpad *kpad = handle;
337
338 /*
339 * use keventd context to read the event fifo registers
340 * Schedule readout at least 25ms after notification for
341 * REVID < 4
342 */
343
344 schedule_delayed_work(&kpad->work, kpad->delay);
345
346 return IRQ_HANDLED;
347 }
348
349 static int __devinit adp5588_setup(struct i2c_client *client)
350 {
351 const struct adp5588_kpad_platform_data *pdata = client->dev.platform_data;
352 const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
353 int i, ret;
354 unsigned char evt_mode1 = 0, evt_mode2 = 0, evt_mode3 = 0;
355
356 ret = adp5588_write(client, KP_GPIO1, KP_SEL(pdata->rows));
357 ret |= adp5588_write(client, KP_GPIO2, KP_SEL(pdata->cols) & 0xFF);
358 ret |= adp5588_write(client, KP_GPIO3, KP_SEL(pdata->cols) >> 8);
359
360 if (pdata->en_keylock) {
361 ret |= adp5588_write(client, UNLOCK1, pdata->unlock_key1);
362 ret |= adp5588_write(client, UNLOCK2, pdata->unlock_key2);
363 ret |= adp5588_write(client, KEY_LCK_EC_STAT, K_LCK_EN);
364 }
365
366 for (i = 0; i < KEYP_MAX_EVENT; i++)
367 ret |= adp5588_read(client, Key_EVENTA);
368
369 for (i = 0; i < pdata->gpimapsize; i++) {
370 unsigned short pin = pdata->gpimap[i].pin;
371
372 if (pin <= GPI_PIN_ROW_END) {
373 evt_mode1 |= (1 << (pin - GPI_PIN_ROW_BASE));
374 } else {
375 evt_mode2 |= ((1 << (pin - GPI_PIN_COL_BASE)) & 0xFF);
376 evt_mode3 |= ((1 << (pin - GPI_PIN_COL_BASE)) >> 8);
377 }
378 }
379
380 if (pdata->gpimapsize) {
381 ret |= adp5588_write(client, GPI_EM1, evt_mode1);
382 ret |= adp5588_write(client, GPI_EM2, evt_mode2);
383 ret |= adp5588_write(client, GPI_EM3, evt_mode3);
384 }
385
386 if (gpio_data) {
387 for (i = 0; i <= ADP_BANK(MAXGPIO); i++) {
388 int pull_mask = gpio_data->pullup_dis_mask;
389
390 ret |= adp5588_write(client, GPIO_PULL1 + i,
391 (pull_mask >> (8 * i)) & 0xFF);
392 }
393 }
394
395 ret |= adp5588_write(client, INT_STAT, CMP2_INT | CMP1_INT |
396 OVR_FLOW_INT | K_LCK_INT |
397 GPI_INT | KE_INT); /* Status is W1C */
398
399 ret |= adp5588_write(client, CFG, INT_CFG | OVR_FLOW_IEN | KE_IEN);
400
401 if (ret < 0) {
402 dev_err(&client->dev, "Write Error\n");
403 return ret;
404 }
405
406 return 0;
407 }
408
409 static void __devinit adp5588_report_switch_state(struct adp5588_kpad *kpad)
410 {
411 int gpi_stat1 = adp5588_read(kpad->client, GPIO_DAT_STAT1);
412 int gpi_stat2 = adp5588_read(kpad->client, GPIO_DAT_STAT2);
413 int gpi_stat3 = adp5588_read(kpad->client, GPIO_DAT_STAT3);
414 int gpi_stat_tmp, pin_loc;
415 int i;
416
417 for (i = 0; i < kpad->gpimapsize; i++) {
418 unsigned short pin = kpad->gpimap[i].pin;
419
420 if (pin <= GPI_PIN_ROW_END) {
421 gpi_stat_tmp = gpi_stat1;
422 pin_loc = pin - GPI_PIN_ROW_BASE;
423 } else if ((pin - GPI_PIN_COL_BASE) < 8) {
424 gpi_stat_tmp = gpi_stat2;
425 pin_loc = pin - GPI_PIN_COL_BASE;
426 } else {
427 gpi_stat_tmp = gpi_stat3;
428 pin_loc = pin - GPI_PIN_COL_BASE - 8;
429 }
430
431 if (gpi_stat_tmp < 0) {
432 dev_err(&kpad->client->dev,
433 "Can't read GPIO_DAT_STAT switch %d default to OFF\n",
434 pin);
435 gpi_stat_tmp = 0;
436 }
437
438 input_report_switch(kpad->input,
439 kpad->gpimap[i].sw_evt,
440 !(gpi_stat_tmp & (1 << pin_loc)));
441 }
442
443 input_sync(kpad->input);
444 }
445
446
447 static int __devinit adp5588_probe(struct i2c_client *client,
448 const struct i2c_device_id *id)
449 {
450 struct adp5588_kpad *kpad;
451 const struct adp5588_kpad_platform_data *pdata = client->dev.platform_data;
452 struct input_dev *input;
453 unsigned int revid;
454 int ret, i;
455 int error;
456
457 if (!i2c_check_functionality(client->adapter,
458 I2C_FUNC_SMBUS_BYTE_DATA)) {
459 dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
460 return -EIO;
461 }
462
463 if (!pdata) {
464 dev_err(&client->dev, "no platform data?\n");
465 return -EINVAL;
466 }
467
468 if (!pdata->rows || !pdata->cols || !pdata->keymap) {
469 dev_err(&client->dev, "no rows, cols or keymap from pdata\n");
470 return -EINVAL;
471 }
472
473 if (pdata->keymapsize != ADP5588_KEYMAPSIZE) {
474 dev_err(&client->dev, "invalid keymapsize\n");
475 return -EINVAL;
476 }
477
478 if (!pdata->gpimap && pdata->gpimapsize) {
479 dev_err(&client->dev, "invalid gpimap from pdata\n");
480 return -EINVAL;
481 }
482
483 if (pdata->gpimapsize > ADP5588_GPIMAPSIZE_MAX) {
484 dev_err(&client->dev, "invalid gpimapsize\n");
485 return -EINVAL;
486 }
487
488 for (i = 0; i < pdata->gpimapsize; i++) {
489 unsigned short pin = pdata->gpimap[i].pin;
490
491 if (pin < GPI_PIN_BASE || pin > GPI_PIN_END) {
492 dev_err(&client->dev, "invalid gpi pin data\n");
493 return -EINVAL;
494 }
495
496 if (pin <= GPI_PIN_ROW_END) {
497 if (pin - GPI_PIN_ROW_BASE + 1 <= pdata->rows) {
498 dev_err(&client->dev, "invalid gpi row data\n");
499 return -EINVAL;
500 }
501 } else {
502 if (pin - GPI_PIN_COL_BASE + 1 <= pdata->cols) {
503 dev_err(&client->dev, "invalid gpi col data\n");
504 return -EINVAL;
505 }
506 }
507 }
508
509 if (!client->irq) {
510 dev_err(&client->dev, "no IRQ?\n");
511 return -EINVAL;
512 }
513
514 kpad = kzalloc(sizeof(*kpad), GFP_KERNEL);
515 input = input_allocate_device();
516 if (!kpad || !input) {
517 error = -ENOMEM;
518 goto err_free_mem;
519 }
520
521 kpad->client = client;
522 kpad->input = input;
523 INIT_DELAYED_WORK(&kpad->work, adp5588_work);
524
525 ret = adp5588_read(client, DEV_ID);
526 if (ret < 0) {
527 error = ret;
528 goto err_free_mem;
529 }
530
531 revid = (u8) ret & ADP5588_DEVICE_ID_MASK;
532 if (WA_DELAYED_READOUT_REVID(revid))
533 kpad->delay = msecs_to_jiffies(30);
534
535 input->name = client->name;
536 input->phys = "adp5588-keys/input0";
537 input->dev.parent = &client->dev;
538
539 input_set_drvdata(input, kpad);
540
541 input->id.bustype = BUS_I2C;
542 input->id.vendor = 0x0001;
543 input->id.product = 0x0001;
544 input->id.version = revid;
545
546 input->keycodesize = sizeof(kpad->keycode[0]);
547 input->keycodemax = pdata->keymapsize;
548 input->keycode = kpad->keycode;
549
550 memcpy(kpad->keycode, pdata->keymap,
551 pdata->keymapsize * input->keycodesize);
552
553 kpad->gpimap = pdata->gpimap;
554 kpad->gpimapsize = pdata->gpimapsize;
555
556 /* setup input device */
557 __set_bit(EV_KEY, input->evbit);
558
559 if (pdata->repeat)
560 __set_bit(EV_REP, input->evbit);
561
562 for (i = 0; i < input->keycodemax; i++)
563 __set_bit(kpad->keycode[i] & KEY_MAX, input->keybit);
564 __clear_bit(KEY_RESERVED, input->keybit);
565
566 if (kpad->gpimapsize)
567 __set_bit(EV_SW, input->evbit);
568 for (i = 0; i < kpad->gpimapsize; i++)
569 __set_bit(kpad->gpimap[i].sw_evt, input->swbit);
570
571 error = input_register_device(input);
572 if (error) {
573 dev_err(&client->dev, "unable to register input device\n");
574 goto err_free_mem;
575 }
576
577 error = request_irq(client->irq, adp5588_irq,
578 IRQF_TRIGGER_FALLING | IRQF_DISABLED,
579 client->dev.driver->name, kpad);
580 if (error) {
581 dev_err(&client->dev, "irq %d busy?\n", client->irq);
582 goto err_unreg_dev;
583 }
584
585 error = adp5588_setup(client);
586 if (error)
587 goto err_free_irq;
588
589 if (kpad->gpimapsize)
590 adp5588_report_switch_state(kpad);
591
592 error = adp5588_gpio_add(kpad);
593 if (error)
594 goto err_free_irq;
595
596 device_init_wakeup(&client->dev, 1);
597 i2c_set_clientdata(client, kpad);
598
599 dev_info(&client->dev, "Rev.%d keypad, irq %d\n", revid, client->irq);
600 return 0;
601
602 err_free_irq:
603 free_irq(client->irq, kpad);
604 err_unreg_dev:
605 input_unregister_device(input);
606 input = NULL;
607 err_free_mem:
608 input_free_device(input);
609 kfree(kpad);
610
611 return error;
612 }
613
614 static int __devexit adp5588_remove(struct i2c_client *client)
615 {
616 struct adp5588_kpad *kpad = i2c_get_clientdata(client);
617
618 adp5588_write(client, CFG, 0);
619 free_irq(client->irq, kpad);
620 cancel_delayed_work_sync(&kpad->work);
621 input_unregister_device(kpad->input);
622 adp5588_gpio_remove(kpad);
623 kfree(kpad);
624
625 return 0;
626 }
627
628 #ifdef CONFIG_PM
629 static int adp5588_suspend(struct device *dev)
630 {
631 struct adp5588_kpad *kpad = dev_get_drvdata(dev);
632 struct i2c_client *client = kpad->client;
633
634 disable_irq(client->irq);
635 cancel_delayed_work_sync(&kpad->work);
636
637 if (device_may_wakeup(&client->dev))
638 enable_irq_wake(client->irq);
639
640 return 0;
641 }
642
643 static int adp5588_resume(struct device *dev)
644 {
645 struct adp5588_kpad *kpad = dev_get_drvdata(dev);
646 struct i2c_client *client = kpad->client;
647
648 if (device_may_wakeup(&client->dev))
649 disable_irq_wake(client->irq);
650
651 enable_irq(client->irq);
652
653 return 0;
654 }
655
656 static const struct dev_pm_ops adp5588_dev_pm_ops = {
657 .suspend = adp5588_suspend,
658 .resume = adp5588_resume,
659 };
660 #endif
661
662 static const struct i2c_device_id adp5588_id[] = {
663 { KBUILD_MODNAME, 0 },
664 { "adp5587-keys", 0 },
665 { }
666 };
667 MODULE_DEVICE_TABLE(i2c, adp5588_id);
668
669 static struct i2c_driver adp5588_driver = {
670 .driver = {
671 .name = KBUILD_MODNAME,
672 #ifdef CONFIG_PM
673 .pm = &adp5588_dev_pm_ops,
674 #endif
675 },
676 .probe = adp5588_probe,
677 .remove = __devexit_p(adp5588_remove),
678 .id_table = adp5588_id,
679 };
680
681 static int __init adp5588_init(void)
682 {
683 return i2c_add_driver(&adp5588_driver);
684 }
685 module_init(adp5588_init);
686
687 static void __exit adp5588_exit(void)
688 {
689 i2c_del_driver(&adp5588_driver);
690 }
691 module_exit(adp5588_exit);
692
693 MODULE_LICENSE("GPL");
694 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
695 MODULE_DESCRIPTION("ADP5588/87 Keypad driver");
696 MODULE_ALIAS("platform:adp5588-keys");
Linux kernel - Deliverables
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