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) 2008-2010 Analog Devices Inc.
8  * Licensed under the GPL-2 or later.
9  */
10 
11 #include <linux/module.h>
12 #include <linux/interrupt.h>
13 #include <linux/irq.h>
14 #include <linux/workqueue.h>
15 #include <linux/errno.h>
16 #include <linux/pm.h>
17 #include <linux/platform_device.h>
18 #include <linux/input.h>
19 #include <linux/i2c.h>
20 #include <linux/gpio.h>
21 #include <linux/slab.h>
22 
23 #include <linux/platform_data/adp5588.h>
24 
25 /* Key Event Register xy */
26 #define KEY_EV_PRESSED		(1 << 7)
27 #define KEY_EV_MASK		(0x7F)
28 
29 #define KP_SEL(x)		(0xFFFF >> (16 - x))	/* 2^x-1 */
30 
31 #define KEYP_MAX_EVENT		10
32 
33 /*
34  * Early pre 4.0 Silicon required to delay readout by at least 25ms,
35  * since the Event Counter Register updated 25ms after the interrupt
36  * asserted.
37  */
38 #define WA_DELAYED_READOUT_REVID(rev)		((rev) < 4)
39 
40 struct adp5588_kpad {
41 	struct i2c_client *client;
42 	struct input_dev *input;
43 	struct delayed_work work;
44 	unsigned long delay;
45 	unsigned short keycode[ADP5588_KEYMAPSIZE];
46 	const struct adp5588_gpi_map *gpimap;
47 	unsigned short gpimapsize;
48 #ifdef CONFIG_GPIOLIB
49 	unsigned char gpiomap[ADP5588_MAXGPIO];
50 	bool export_gpio;
51 	struct gpio_chip gc;
52 	struct mutex gpio_lock;	/* Protect cached dir, dat_out */
53 	u8 dat_out[3];
54 	u8 dir[3];
55 #endif
56 };
57 
58 static int adp5588_read(struct i2c_client *client, u8 reg)
59 {
60 	int ret = i2c_smbus_read_byte_data(client, reg);
61 
62 	if (ret < 0)
63 		dev_err(&client->dev, "Read Error\n");
64 
65 	return ret;
66 }
67 
68 static int adp5588_write(struct i2c_client *client, u8 reg, u8 val)
69 {
70 	return i2c_smbus_write_byte_data(client, reg, val);
71 }
72 
73 #ifdef CONFIG_GPIOLIB
74 static int adp5588_gpio_get_value(struct gpio_chip *chip, unsigned off)
75 {
76 	struct adp5588_kpad *kpad = gpiochip_get_data(chip);
77 	unsigned int bank = ADP5588_BANK(kpad->gpiomap[off]);
78 	unsigned int bit = ADP5588_BIT(kpad->gpiomap[off]);
79 	int val;
80 
81 	mutex_lock(&kpad->gpio_lock);
82 
83 	if (kpad->dir[bank] & bit)
84 		val = kpad->dat_out[bank];
85 	else
86 		val = adp5588_read(kpad->client, GPIO_DAT_STAT1 + bank);
87 
88 	mutex_unlock(&kpad->gpio_lock);
89 
90 	return !!(val & bit);
91 }
92 
93 static void adp5588_gpio_set_value(struct gpio_chip *chip,
94 				   unsigned off, int val)
95 {
96 	struct adp5588_kpad *kpad = gpiochip_get_data(chip);
97 	unsigned int bank = ADP5588_BANK(kpad->gpiomap[off]);
98 	unsigned int bit = ADP5588_BIT(kpad->gpiomap[off]);
99 
100 	mutex_lock(&kpad->gpio_lock);
101 
102 	if (val)
103 		kpad->dat_out[bank] |= bit;
104 	else
105 		kpad->dat_out[bank] &= ~bit;
106 
107 	adp5588_write(kpad->client, GPIO_DAT_OUT1 + bank,
108 			   kpad->dat_out[bank]);
109 
110 	mutex_unlock(&kpad->gpio_lock);
111 }
112 
113 static int adp5588_gpio_direction_input(struct gpio_chip *chip, unsigned off)
114 {
115 	struct adp5588_kpad *kpad = gpiochip_get_data(chip);
116 	unsigned int bank = ADP5588_BANK(kpad->gpiomap[off]);
117 	unsigned int bit = ADP5588_BIT(kpad->gpiomap[off]);
118 	int ret;
119 
120 	mutex_lock(&kpad->gpio_lock);
121 
122 	kpad->dir[bank] &= ~bit;
123 	ret = adp5588_write(kpad->client, GPIO_DIR1 + bank, kpad->dir[bank]);
124 
125 	mutex_unlock(&kpad->gpio_lock);
126 
127 	return ret;
128 }
129 
130 static int adp5588_gpio_direction_output(struct gpio_chip *chip,
131 					 unsigned off, int val)
132 {
133 	struct adp5588_kpad *kpad = gpiochip_get_data(chip);
134 	unsigned int bank = ADP5588_BANK(kpad->gpiomap[off]);
135 	unsigned int bit = ADP5588_BIT(kpad->gpiomap[off]);
136 	int ret;
137 
138 	mutex_lock(&kpad->gpio_lock);
139 
140 	kpad->dir[bank] |= bit;
141 
142 	if (val)
143 		kpad->dat_out[bank] |= bit;
144 	else
145 		kpad->dat_out[bank] &= ~bit;
146 
147 	ret = adp5588_write(kpad->client, GPIO_DAT_OUT1 + bank,
148 				 kpad->dat_out[bank]);
149 	ret |= adp5588_write(kpad->client, GPIO_DIR1 + bank,
150 				 kpad->dir[bank]);
151 
152 	mutex_unlock(&kpad->gpio_lock);
153 
154 	return ret;
155 }
156 
157 static int adp5588_build_gpiomap(struct adp5588_kpad *kpad,
158 				const struct adp5588_kpad_platform_data *pdata)
159 {
160 	bool pin_used[ADP5588_MAXGPIO];
161 	int n_unused = 0;
162 	int i;
163 
164 	memset(pin_used, 0, sizeof(pin_used));
165 
166 	for (i = 0; i < pdata->rows; i++)
167 		pin_used[i] = true;
168 
169 	for (i = 0; i < pdata->cols; i++)
170 		pin_used[i + GPI_PIN_COL_BASE - GPI_PIN_BASE] = true;
171 
172 	for (i = 0; i < kpad->gpimapsize; i++)
173 		pin_used[kpad->gpimap[i].pin - GPI_PIN_BASE] = true;
174 
175 	for (i = 0; i < ADP5588_MAXGPIO; i++)
176 		if (!pin_used[i])
177 			kpad->gpiomap[n_unused++] = i;
178 
179 	return n_unused;
180 }
181 
182 static int adp5588_gpio_add(struct adp5588_kpad *kpad)
183 {
184 	struct device *dev = &kpad->client->dev;
185 	const struct adp5588_kpad_platform_data *pdata = dev_get_platdata(dev);
186 	const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
187 	int i, error;
188 
189 	if (!gpio_data)
190 		return 0;
191 
192 	kpad->gc.ngpio = adp5588_build_gpiomap(kpad, pdata);
193 	if (kpad->gc.ngpio == 0) {
194 		dev_info(dev, "No unused gpios left to export\n");
195 		return 0;
196 	}
197 
198 	kpad->export_gpio = true;
199 
200 	kpad->gc.direction_input = adp5588_gpio_direction_input;
201 	kpad->gc.direction_output = adp5588_gpio_direction_output;
202 	kpad->gc.get = adp5588_gpio_get_value;
203 	kpad->gc.set = adp5588_gpio_set_value;
204 	kpad->gc.can_sleep = 1;
205 
206 	kpad->gc.base = gpio_data->gpio_start;
207 	kpad->gc.label = kpad->client->name;
208 	kpad->gc.owner = THIS_MODULE;
209 	kpad->gc.names = gpio_data->names;
210 
211 	mutex_init(&kpad->gpio_lock);
212 
213 	error = gpiochip_add_data(&kpad->gc, kpad);
214 	if (error) {
215 		dev_err(dev, "gpiochip_add failed, err: %d\n", error);
216 		return error;
217 	}
218 
219 	for (i = 0; i <= ADP5588_BANK(ADP5588_MAXGPIO); i++) {
220 		kpad->dat_out[i] = adp5588_read(kpad->client,
221 						GPIO_DAT_OUT1 + i);
222 		kpad->dir[i] = adp5588_read(kpad->client, GPIO_DIR1 + i);
223 	}
224 
225 	if (gpio_data->setup) {
226 		error = gpio_data->setup(kpad->client,
227 					 kpad->gc.base, kpad->gc.ngpio,
228 					 gpio_data->context);
229 		if (error)
230 			dev_warn(dev, "setup failed, %d\n", error);
231 	}
232 
233 	return 0;
234 }
235 
236 static void adp5588_gpio_remove(struct adp5588_kpad *kpad)
237 {
238 	struct device *dev = &kpad->client->dev;
239 	const struct adp5588_kpad_platform_data *pdata = dev_get_platdata(dev);
240 	const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
241 	int error;
242 
243 	if (!kpad->export_gpio)
244 		return;
245 
246 	if (gpio_data->teardown) {
247 		error = gpio_data->teardown(kpad->client,
248 					    kpad->gc.base, kpad->gc.ngpio,
249 					    gpio_data->context);
250 		if (error)
251 			dev_warn(dev, "teardown failed %d\n", error);
252 	}
253 
254 	gpiochip_remove(&kpad->gc);
255 }
256 #else
257 static inline int adp5588_gpio_add(struct adp5588_kpad *kpad)
258 {
259 	return 0;
260 }
261 
262 static inline void adp5588_gpio_remove(struct adp5588_kpad *kpad)
263 {
264 }
265 #endif
266 
267 static void adp5588_report_events(struct adp5588_kpad *kpad, int ev_cnt)
268 {
269 	int i, j;
270 
271 	for (i = 0; i < ev_cnt; i++) {
272 		int key = adp5588_read(kpad->client, Key_EVENTA + i);
273 		int key_val = key & KEY_EV_MASK;
274 
275 		if (key_val >= GPI_PIN_BASE && key_val <= GPI_PIN_END) {
276 			for (j = 0; j < kpad->gpimapsize; j++) {
277 				if (key_val == kpad->gpimap[j].pin) {
278 					input_report_switch(kpad->input,
279 							kpad->gpimap[j].sw_evt,
280 							key & KEY_EV_PRESSED);
281 					break;
282 				}
283 			}
284 		} else {
285 			input_report_key(kpad->input,
286 					 kpad->keycode[key_val - 1],
287 					 key & KEY_EV_PRESSED);
288 		}
289 	}
290 }
291 
292 static void adp5588_work(struct work_struct *work)
293 {
294 	struct adp5588_kpad *kpad = container_of(work,
295 						struct adp5588_kpad, work.work);
296 	struct i2c_client *client = kpad->client;
297 	int status, ev_cnt;
298 
299 	status = adp5588_read(client, INT_STAT);
300 
301 	if (status & ADP5588_OVR_FLOW_INT)	/* Unlikely and should never happen */
302 		dev_err(&client->dev, "Event Overflow Error\n");
303 
304 	if (status & ADP5588_KE_INT) {
305 		ev_cnt = adp5588_read(client, KEY_LCK_EC_STAT) & ADP5588_KEC;
306 		if (ev_cnt) {
307 			adp5588_report_events(kpad, ev_cnt);
308 			input_sync(kpad->input);
309 		}
310 	}
311 	adp5588_write(client, INT_STAT, status); /* Status is W1C */
312 }
313 
314 static irqreturn_t adp5588_irq(int irq, void *handle)
315 {
316 	struct adp5588_kpad *kpad = handle;
317 
318 	/*
319 	 * use keventd context to read the event fifo registers
320 	 * Schedule readout at least 25ms after notification for
321 	 * REVID < 4
322 	 */
323 
324 	schedule_delayed_work(&kpad->work, kpad->delay);
325 
326 	return IRQ_HANDLED;
327 }
328 
329 static int adp5588_setup(struct i2c_client *client)
330 {
331 	const struct adp5588_kpad_platform_data *pdata =
332 			dev_get_platdata(&client->dev);
333 	const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
334 	int i, ret;
335 	unsigned char evt_mode1 = 0, evt_mode2 = 0, evt_mode3 = 0;
336 
337 	ret = adp5588_write(client, KP_GPIO1, KP_SEL(pdata->rows));
338 	ret |= adp5588_write(client, KP_GPIO2, KP_SEL(pdata->cols) & 0xFF);
339 	ret |= adp5588_write(client, KP_GPIO3, KP_SEL(pdata->cols) >> 8);
340 
341 	if (pdata->en_keylock) {
342 		ret |= adp5588_write(client, UNLOCK1, pdata->unlock_key1);
343 		ret |= adp5588_write(client, UNLOCK2, pdata->unlock_key2);
344 		ret |= adp5588_write(client, KEY_LCK_EC_STAT, ADP5588_K_LCK_EN);
345 	}
346 
347 	for (i = 0; i < KEYP_MAX_EVENT; i++)
348 		ret |= adp5588_read(client, Key_EVENTA);
349 
350 	for (i = 0; i < pdata->gpimapsize; i++) {
351 		unsigned short pin = pdata->gpimap[i].pin;
352 
353 		if (pin <= GPI_PIN_ROW_END) {
354 			evt_mode1 |= (1 << (pin - GPI_PIN_ROW_BASE));
355 		} else {
356 			evt_mode2 |= ((1 << (pin - GPI_PIN_COL_BASE)) & 0xFF);
357 			evt_mode3 |= ((1 << (pin - GPI_PIN_COL_BASE)) >> 8);
358 		}
359 	}
360 
361 	if (pdata->gpimapsize) {
362 		ret |= adp5588_write(client, GPI_EM1, evt_mode1);
363 		ret |= adp5588_write(client, GPI_EM2, evt_mode2);
364 		ret |= adp5588_write(client, GPI_EM3, evt_mode3);
365 	}
366 
367 	if (gpio_data) {
368 		for (i = 0; i <= ADP5588_BANK(ADP5588_MAXGPIO); i++) {
369 			int pull_mask = gpio_data->pullup_dis_mask;
370 
371 			ret |= adp5588_write(client, GPIO_PULL1 + i,
372 				(pull_mask >> (8 * i)) & 0xFF);
373 		}
374 	}
375 
376 	ret |= adp5588_write(client, INT_STAT,
377 				ADP5588_CMP2_INT | ADP5588_CMP1_INT |
378 				ADP5588_OVR_FLOW_INT | ADP5588_K_LCK_INT |
379 				ADP5588_GPI_INT | ADP5588_KE_INT); /* Status is W1C */
380 
381 	ret |= adp5588_write(client, CFG, ADP5588_INT_CFG |
382 					  ADP5588_OVR_FLOW_IEN |
383 					  ADP5588_KE_IEN);
384 
385 	if (ret < 0) {
386 		dev_err(&client->dev, "Write Error\n");
387 		return ret;
388 	}
389 
390 	return 0;
391 }
392 
393 static void adp5588_report_switch_state(struct adp5588_kpad *kpad)
394 {
395 	int gpi_stat1 = adp5588_read(kpad->client, GPIO_DAT_STAT1);
396 	int gpi_stat2 = adp5588_read(kpad->client, GPIO_DAT_STAT2);
397 	int gpi_stat3 = adp5588_read(kpad->client, GPIO_DAT_STAT3);
398 	int gpi_stat_tmp, pin_loc;
399 	int i;
400 
401 	for (i = 0; i < kpad->gpimapsize; i++) {
402 		unsigned short pin = kpad->gpimap[i].pin;
403 
404 		if (pin <= GPI_PIN_ROW_END) {
405 			gpi_stat_tmp = gpi_stat1;
406 			pin_loc = pin - GPI_PIN_ROW_BASE;
407 		} else if ((pin - GPI_PIN_COL_BASE) < 8) {
408 			gpi_stat_tmp = gpi_stat2;
409 			pin_loc = pin - GPI_PIN_COL_BASE;
410 		} else {
411 			gpi_stat_tmp = gpi_stat3;
412 			pin_loc = pin - GPI_PIN_COL_BASE - 8;
413 		}
414 
415 		if (gpi_stat_tmp < 0) {
416 			dev_err(&kpad->client->dev,
417 				"Can't read GPIO_DAT_STAT switch %d default to OFF\n",
418 				pin);
419 			gpi_stat_tmp = 0;
420 		}
421 
422 		input_report_switch(kpad->input,
423 				    kpad->gpimap[i].sw_evt,
424 				    !(gpi_stat_tmp & (1 << pin_loc)));
425 	}
426 
427 	input_sync(kpad->input);
428 }
429 
430 
431 static int adp5588_probe(struct i2c_client *client,
432 			 const struct i2c_device_id *id)
433 {
434 	struct adp5588_kpad *kpad;
435 	const struct adp5588_kpad_platform_data *pdata =
436 			dev_get_platdata(&client->dev);
437 	struct input_dev *input;
438 	unsigned int revid;
439 	int ret, i;
440 	int error;
441 
442 	if (!i2c_check_functionality(client->adapter,
443 					I2C_FUNC_SMBUS_BYTE_DATA)) {
444 		dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
445 		return -EIO;
446 	}
447 
448 	if (!pdata) {
449 		dev_err(&client->dev, "no platform data?\n");
450 		return -EINVAL;
451 	}
452 
453 	if (!pdata->rows || !pdata->cols || !pdata->keymap) {
454 		dev_err(&client->dev, "no rows, cols or keymap from pdata\n");
455 		return -EINVAL;
456 	}
457 
458 	if (pdata->keymapsize != ADP5588_KEYMAPSIZE) {
459 		dev_err(&client->dev, "invalid keymapsize\n");
460 		return -EINVAL;
461 	}
462 
463 	if (!pdata->gpimap && pdata->gpimapsize) {
464 		dev_err(&client->dev, "invalid gpimap from pdata\n");
465 		return -EINVAL;
466 	}
467 
468 	if (pdata->gpimapsize > ADP5588_GPIMAPSIZE_MAX) {
469 		dev_err(&client->dev, "invalid gpimapsize\n");
470 		return -EINVAL;
471 	}
472 
473 	for (i = 0; i < pdata->gpimapsize; i++) {
474 		unsigned short pin = pdata->gpimap[i].pin;
475 
476 		if (pin < GPI_PIN_BASE || pin > GPI_PIN_END) {
477 			dev_err(&client->dev, "invalid gpi pin data\n");
478 			return -EINVAL;
479 		}
480 
481 		if (pin <= GPI_PIN_ROW_END) {
482 			if (pin - GPI_PIN_ROW_BASE + 1 <= pdata->rows) {
483 				dev_err(&client->dev, "invalid gpi row data\n");
484 				return -EINVAL;
485 			}
486 		} else {
487 			if (pin - GPI_PIN_COL_BASE + 1 <= pdata->cols) {
488 				dev_err(&client->dev, "invalid gpi col data\n");
489 				return -EINVAL;
490 			}
491 		}
492 	}
493 
494 	if (!client->irq) {
495 		dev_err(&client->dev, "no IRQ?\n");
496 		return -EINVAL;
497 	}
498 
499 	kpad = kzalloc(sizeof(*kpad), GFP_KERNEL);
500 	input = input_allocate_device();
501 	if (!kpad || !input) {
502 		error = -ENOMEM;
503 		goto err_free_mem;
504 	}
505 
506 	kpad->client = client;
507 	kpad->input = input;
508 	INIT_DELAYED_WORK(&kpad->work, adp5588_work);
509 
510 	ret = adp5588_read(client, DEV_ID);
511 	if (ret < 0) {
512 		error = ret;
513 		goto err_free_mem;
514 	}
515 
516 	revid = (u8) ret & ADP5588_DEVICE_ID_MASK;
517 	if (WA_DELAYED_READOUT_REVID(revid))
518 		kpad->delay = msecs_to_jiffies(30);
519 
520 	input->name = client->name;
521 	input->phys = "adp5588-keys/input0";
522 	input->dev.parent = &client->dev;
523 
524 	input_set_drvdata(input, kpad);
525 
526 	input->id.bustype = BUS_I2C;
527 	input->id.vendor = 0x0001;
528 	input->id.product = 0x0001;
529 	input->id.version = revid;
530 
531 	input->keycodesize = sizeof(kpad->keycode[0]);
532 	input->keycodemax = pdata->keymapsize;
533 	input->keycode = kpad->keycode;
534 
535 	memcpy(kpad->keycode, pdata->keymap,
536 		pdata->keymapsize * input->keycodesize);
537 
538 	kpad->gpimap = pdata->gpimap;
539 	kpad->gpimapsize = pdata->gpimapsize;
540 
541 	/* setup input device */
542 	__set_bit(EV_KEY, input->evbit);
543 
544 	if (pdata->repeat)
545 		__set_bit(EV_REP, input->evbit);
546 
547 	for (i = 0; i < input->keycodemax; i++)
548 		if (kpad->keycode[i] <= KEY_MAX)
549 			__set_bit(kpad->keycode[i], input->keybit);
550 	__clear_bit(KEY_RESERVED, input->keybit);
551 
552 	if (kpad->gpimapsize)
553 		__set_bit(EV_SW, input->evbit);
554 	for (i = 0; i < kpad->gpimapsize; i++)
555 		__set_bit(kpad->gpimap[i].sw_evt, input->swbit);
556 
557 	error = input_register_device(input);
558 	if (error) {
559 		dev_err(&client->dev, "unable to register input device\n");
560 		goto err_free_mem;
561 	}
562 
563 	error = request_irq(client->irq, adp5588_irq,
564 			    IRQF_TRIGGER_FALLING,
565 			    client->dev.driver->name, kpad);
566 	if (error) {
567 		dev_err(&client->dev, "irq %d busy?\n", client->irq);
568 		goto err_unreg_dev;
569 	}
570 
571 	error = adp5588_setup(client);
572 	if (error)
573 		goto err_free_irq;
574 
575 	if (kpad->gpimapsize)
576 		adp5588_report_switch_state(kpad);
577 
578 	error = adp5588_gpio_add(kpad);
579 	if (error)
580 		goto err_free_irq;
581 
582 	device_init_wakeup(&client->dev, 1);
583 	i2c_set_clientdata(client, kpad);
584 
585 	dev_info(&client->dev, "Rev.%d keypad, irq %d\n", revid, client->irq);
586 	return 0;
587 
588  err_free_irq:
589 	free_irq(client->irq, kpad);
590 	cancel_delayed_work_sync(&kpad->work);
591  err_unreg_dev:
592 	input_unregister_device(input);
593 	input = NULL;
594  err_free_mem:
595 	input_free_device(input);
596 	kfree(kpad);
597 
598 	return error;
599 }
600 
601 static int adp5588_remove(struct i2c_client *client)
602 {
603 	struct adp5588_kpad *kpad = i2c_get_clientdata(client);
604 
605 	adp5588_write(client, CFG, 0);
606 	free_irq(client->irq, kpad);
607 	cancel_delayed_work_sync(&kpad->work);
608 	input_unregister_device(kpad->input);
609 	adp5588_gpio_remove(kpad);
610 	kfree(kpad);
611 
612 	return 0;
613 }
614 
615 #ifdef CONFIG_PM
616 static int adp5588_suspend(struct device *dev)
617 {
618 	struct adp5588_kpad *kpad = dev_get_drvdata(dev);
619 	struct i2c_client *client = kpad->client;
620 
621 	disable_irq(client->irq);
622 	cancel_delayed_work_sync(&kpad->work);
623 
624 	if (device_may_wakeup(&client->dev))
625 		enable_irq_wake(client->irq);
626 
627 	return 0;
628 }
629 
630 static int adp5588_resume(struct device *dev)
631 {
632 	struct adp5588_kpad *kpad = dev_get_drvdata(dev);
633 	struct i2c_client *client = kpad->client;
634 
635 	if (device_may_wakeup(&client->dev))
636 		disable_irq_wake(client->irq);
637 
638 	enable_irq(client->irq);
639 
640 	return 0;
641 }
642 
643 static const struct dev_pm_ops adp5588_dev_pm_ops = {
644 	.suspend = adp5588_suspend,
645 	.resume  = adp5588_resume,
646 };
647 #endif
648 
649 static const struct i2c_device_id adp5588_id[] = {
650 	{ "adp5588-keys", 0 },
651 	{ "adp5587-keys", 0 },
652 	{ }
653 };
654 MODULE_DEVICE_TABLE(i2c, adp5588_id);
655 
656 static struct i2c_driver adp5588_driver = {
657 	.driver = {
658 		.name = KBUILD_MODNAME,
659 #ifdef CONFIG_PM
660 		.pm   = &adp5588_dev_pm_ops,
661 #endif
662 	},
663 	.probe    = adp5588_probe,
664 	.remove   = adp5588_remove,
665 	.id_table = adp5588_id,
666 };
667 
668 module_i2c_driver(adp5588_driver);
669 
670 MODULE_LICENSE("GPL");
671 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
672 MODULE_DESCRIPTION("ADP5588/87 Keypad driver");
673