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13#include <linux/module.h>
14#include <linux/platform_device.h>
15#include <linux/kernel.h>
16#include <linux/interrupt.h>
17#include <linux/slab.h>
18#include <linux/input.h>
19#include <linux/bitops.h>
20#include <linux/delay.h>
21#include <linux/mutex.h>
22
23#include <linux/mfd/pm8xxx/core.h>
24#include <linux/mfd/pm8xxx/gpio.h>
25#include <linux/input/pmic8xxx-keypad.h>
26
27#define PM8XXX_MAX_ROWS 18
28#define PM8XXX_MAX_COLS 8
29#define PM8XXX_ROW_SHIFT 3
30#define PM8XXX_MATRIX_MAX_SIZE (PM8XXX_MAX_ROWS * PM8XXX_MAX_COLS)
31
32#define PM8XXX_MIN_ROWS 5
33#define PM8XXX_MIN_COLS 5
34
35#define MAX_SCAN_DELAY 128
36#define MIN_SCAN_DELAY 1
37
38
39#define MAX_ROW_HOLD_DELAY 122000
40#define MIN_ROW_HOLD_DELAY 30500
41
42#define MAX_DEBOUNCE_TIME 20
43#define MIN_DEBOUNCE_TIME 5
44
45#define KEYP_CTRL 0x148
46
47#define KEYP_CTRL_EVNTS BIT(0)
48#define KEYP_CTRL_EVNTS_MASK 0x3
49
50#define KEYP_CTRL_SCAN_COLS_SHIFT 5
51#define KEYP_CTRL_SCAN_COLS_MIN 5
52#define KEYP_CTRL_SCAN_COLS_BITS 0x3
53
54#define KEYP_CTRL_SCAN_ROWS_SHIFT 2
55#define KEYP_CTRL_SCAN_ROWS_MIN 5
56#define KEYP_CTRL_SCAN_ROWS_BITS 0x7
57
58#define KEYP_CTRL_KEYP_EN BIT(7)
59
60#define KEYP_SCAN 0x149
61
62#define KEYP_SCAN_READ_STATE BIT(0)
63#define KEYP_SCAN_DBOUNCE_SHIFT 1
64#define KEYP_SCAN_PAUSE_SHIFT 3
65#define KEYP_SCAN_ROW_HOLD_SHIFT 6
66
67#define KEYP_TEST 0x14A
68
69#define KEYP_TEST_CLEAR_RECENT_SCAN BIT(6)
70#define KEYP_TEST_CLEAR_OLD_SCAN BIT(5)
71#define KEYP_TEST_READ_RESET BIT(4)
72#define KEYP_TEST_DTEST_EN BIT(3)
73#define KEYP_TEST_ABORT_READ BIT(0)
74
75#define KEYP_TEST_DBG_SELECT_SHIFT 1
76
77
78
79
80
81#define KEYP_RECENT_DATA 0x14B
82#define KEYP_OLD_DATA 0x14C
83
84#define KEYP_CLOCK_FREQ 32768
85
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96
97
98struct pmic8xxx_kp {
99 const struct pm8xxx_keypad_platform_data *pdata;
100 struct input_dev *input;
101 int key_sense_irq;
102 int key_stuck_irq;
103
104 unsigned short keycodes[PM8XXX_MATRIX_MAX_SIZE];
105
106 struct device *dev;
107 u16 keystate[PM8XXX_MAX_ROWS];
108 u16 stuckstate[PM8XXX_MAX_ROWS];
109
110 u8 ctrl_reg;
111};
112
113static int pmic8xxx_kp_write_u8(struct pmic8xxx_kp *kp,
114 u8 data, u16 reg)
115{
116 int rc;
117
118 rc = pm8xxx_writeb(kp->dev->parent, reg, data);
119 return rc;
120}
121
122static int pmic8xxx_kp_read(struct pmic8xxx_kp *kp,
123 u8 *data, u16 reg, unsigned num_bytes)
124{
125 int rc;
126
127 rc = pm8xxx_read_buf(kp->dev->parent, reg, data, num_bytes);
128 return rc;
129}
130
131static int pmic8xxx_kp_read_u8(struct pmic8xxx_kp *kp,
132 u8 *data, u16 reg)
133{
134 int rc;
135
136 rc = pmic8xxx_kp_read(kp, data, reg, 1);
137 return rc;
138}
139
140static u8 pmic8xxx_col_state(struct pmic8xxx_kp *kp, u8 col)
141{
142
143 if (col == 0x00)
144 return 1 << kp->pdata->num_cols;
145 else
146 return col & ((1 << kp->pdata->num_cols) - 1);
147}
148
149
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153
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155
156
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158
159
160
161static int pmic8xxx_chk_sync_read(struct pmic8xxx_kp *kp)
162{
163 int rc;
164 u8 scan_val;
165
166 rc = pmic8xxx_kp_read_u8(kp, &scan_val, KEYP_SCAN);
167 if (rc < 0) {
168 dev_err(kp->dev, "Error reading KEYP_SCAN reg, rc=%d\n", rc);
169 return rc;
170 }
171
172 scan_val |= 0x1;
173
174 rc = pmic8xxx_kp_write_u8(kp, scan_val, KEYP_SCAN);
175 if (rc < 0) {
176 dev_err(kp->dev, "Error writing KEYP_SCAN reg, rc=%d\n", rc);
177 return rc;
178 }
179
180
181 udelay((2 * DIV_ROUND_UP(USEC_PER_SEC, KEYP_CLOCK_FREQ)) + 1);
182
183 return rc;
184}
185
186static int pmic8xxx_kp_read_data(struct pmic8xxx_kp *kp, u16 *state,
187 u16 data_reg, int read_rows)
188{
189 int rc, row;
190 u8 new_data[PM8XXX_MAX_ROWS];
191
192 rc = pmic8xxx_kp_read(kp, new_data, data_reg, read_rows);
193 if (rc)
194 return rc;
195
196 for (row = 0; row < kp->pdata->num_rows; row++) {
197 dev_dbg(kp->dev, "new_data[%d] = %d\n", row,
198 new_data[row]);
199 state[row] = pmic8xxx_col_state(kp, new_data[row]);
200 }
201
202 return rc;
203}
204
205static int pmic8xxx_kp_read_matrix(struct pmic8xxx_kp *kp, u16 *new_state,
206 u16 *old_state)
207{
208 int rc, read_rows;
209 u8 scan_val;
210
211 if (kp->pdata->num_rows < PM8XXX_MIN_ROWS)
212 read_rows = PM8XXX_MIN_ROWS;
213 else
214 read_rows = kp->pdata->num_rows;
215
216 pmic8xxx_chk_sync_read(kp);
217
218 if (old_state) {
219 rc = pmic8xxx_kp_read_data(kp, old_state, KEYP_OLD_DATA,
220 read_rows);
221 if (rc < 0) {
222 dev_err(kp->dev,
223 "Error reading KEYP_OLD_DATA, rc=%d\n", rc);
224 return rc;
225 }
226 }
227
228 rc = pmic8xxx_kp_read_data(kp, new_state, KEYP_RECENT_DATA,
229 read_rows);
230 if (rc < 0) {
231 dev_err(kp->dev,
232 "Error reading KEYP_RECENT_DATA, rc=%d\n", rc);
233 return rc;
234 }
235
236
237 udelay((4 * DIV_ROUND_UP(USEC_PER_SEC, KEYP_CLOCK_FREQ)) + 1);
238
239 rc = pmic8xxx_kp_read_u8(kp, &scan_val, KEYP_SCAN);
240 if (rc < 0) {
241 dev_err(kp->dev, "Error reading KEYP_SCAN reg, rc=%d\n", rc);
242 return rc;
243 }
244
245 scan_val &= 0xFE;
246 rc = pmic8xxx_kp_write_u8(kp, scan_val, KEYP_SCAN);
247 if (rc < 0)
248 dev_err(kp->dev, "Error writing KEYP_SCAN reg, rc=%d\n", rc);
249
250 return rc;
251}
252
253static void __pmic8xxx_kp_scan_matrix(struct pmic8xxx_kp *kp, u16 *new_state,
254 u16 *old_state)
255{
256 int row, col, code;
257
258 for (row = 0; row < kp->pdata->num_rows; row++) {
259 int bits_changed = new_state[row] ^ old_state[row];
260
261 if (!bits_changed)
262 continue;
263
264 for (col = 0; col < kp->pdata->num_cols; col++) {
265 if (!(bits_changed & (1 << col)))
266 continue;
267
268 dev_dbg(kp->dev, "key [%d:%d] %s\n", row, col,
269 !(new_state[row] & (1 << col)) ?
270 "pressed" : "released");
271
272 code = MATRIX_SCAN_CODE(row, col, PM8XXX_ROW_SHIFT);
273
274 input_event(kp->input, EV_MSC, MSC_SCAN, code);
275 input_report_key(kp->input,
276 kp->keycodes[code],
277 !(new_state[row] & (1 << col)));
278
279 input_sync(kp->input);
280 }
281 }
282}
283
284static bool pmic8xxx_detect_ghost_keys(struct pmic8xxx_kp *kp, u16 *new_state)
285{
286 int row, found_first = -1;
287 u16 check, row_state;
288
289 check = 0;
290 for (row = 0; row < kp->pdata->num_rows; row++) {
291 row_state = (~new_state[row]) &
292 ((1 << kp->pdata->num_cols) - 1);
293
294 if (hweight16(row_state) > 1) {
295 if (found_first == -1)
296 found_first = row;
297 if (check & row_state) {
298 dev_dbg(kp->dev, "detected ghost key on row[%d]"
299 " and row[%d]\n", found_first, row);
300 return true;
301 }
302 }
303 check |= row_state;
304 }
305 return false;
306}
307
308static int pmic8xxx_kp_scan_matrix(struct pmic8xxx_kp *kp, unsigned int events)
309{
310 u16 new_state[PM8XXX_MAX_ROWS];
311 u16 old_state[PM8XXX_MAX_ROWS];
312 int rc;
313
314 switch (events) {
315 case 0x1:
316 rc = pmic8xxx_kp_read_matrix(kp, new_state, NULL);
317 if (rc < 0)
318 return rc;
319
320
321 if (pmic8xxx_detect_ghost_keys(kp, new_state))
322 return 0;
323 __pmic8xxx_kp_scan_matrix(kp, new_state, kp->keystate);
324 memcpy(kp->keystate, new_state, sizeof(new_state));
325 break;
326 case 0x3:
327 rc = pmic8xxx_kp_read_matrix(kp, new_state, old_state);
328 if (rc < 0)
329 return rc;
330
331 __pmic8xxx_kp_scan_matrix(kp, old_state, kp->keystate);
332 __pmic8xxx_kp_scan_matrix(kp, new_state, old_state);
333 memcpy(kp->keystate, new_state, sizeof(new_state));
334 break;
335 case 0x2:
336 dev_dbg(kp->dev, "Some key events were lost\n");
337 rc = pmic8xxx_kp_read_matrix(kp, new_state, old_state);
338 if (rc < 0)
339 return rc;
340 __pmic8xxx_kp_scan_matrix(kp, old_state, kp->keystate);
341 __pmic8xxx_kp_scan_matrix(kp, new_state, old_state);
342 memcpy(kp->keystate, new_state, sizeof(new_state));
343 break;
344 default:
345 rc = -EINVAL;
346 }
347 return rc;
348}
349
350
351
352
353
354
355
356
357
358
359
360
361static irqreturn_t pmic8xxx_kp_stuck_irq(int irq, void *data)
362{
363 u16 new_state[PM8XXX_MAX_ROWS];
364 u16 old_state[PM8XXX_MAX_ROWS];
365 int rc;
366 struct pmic8xxx_kp *kp = data;
367
368 rc = pmic8xxx_kp_read_matrix(kp, new_state, old_state);
369 if (rc < 0) {
370 dev_err(kp->dev, "failed to read keypad matrix\n");
371 return IRQ_HANDLED;
372 }
373
374 __pmic8xxx_kp_scan_matrix(kp, new_state, kp->stuckstate);
375
376 return IRQ_HANDLED;
377}
378
379static irqreturn_t pmic8xxx_kp_irq(int irq, void *data)
380{
381 struct pmic8xxx_kp *kp = data;
382 u8 ctrl_val, events;
383 int rc;
384
385 rc = pmic8xxx_kp_read(kp, &ctrl_val, KEYP_CTRL, 1);
386 if (rc < 0) {
387 dev_err(kp->dev, "failed to read keyp_ctrl register\n");
388 return IRQ_HANDLED;
389 }
390
391 events = ctrl_val & KEYP_CTRL_EVNTS_MASK;
392
393 rc = pmic8xxx_kp_scan_matrix(kp, events);
394 if (rc < 0)
395 dev_err(kp->dev, "failed to scan matrix\n");
396
397 return IRQ_HANDLED;
398}
399
400static int pmic8xxx_kpd_init(struct pmic8xxx_kp *kp)
401{
402 int bits, rc, cycles;
403 u8 scan_val = 0, ctrl_val = 0;
404 static const u8 row_bits[] = {
405 0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 7, 7, 7,
406 };
407
408
409 if (kp->pdata->num_cols < KEYP_CTRL_SCAN_COLS_MIN)
410 bits = 0;
411 else
412 bits = kp->pdata->num_cols - KEYP_CTRL_SCAN_COLS_MIN;
413 ctrl_val = (bits & KEYP_CTRL_SCAN_COLS_BITS) <<
414 KEYP_CTRL_SCAN_COLS_SHIFT;
415
416
417 if (kp->pdata->num_rows < KEYP_CTRL_SCAN_ROWS_MIN)
418 bits = 0;
419 else
420 bits = row_bits[kp->pdata->num_rows - KEYP_CTRL_SCAN_ROWS_MIN];
421
422 ctrl_val |= (bits << KEYP_CTRL_SCAN_ROWS_SHIFT);
423
424 rc = pmic8xxx_kp_write_u8(kp, ctrl_val, KEYP_CTRL);
425 if (rc < 0) {
426 dev_err(kp->dev, "Error writing KEYP_CTRL reg, rc=%d\n", rc);
427 return rc;
428 }
429
430 bits = (kp->pdata->debounce_ms / 5) - 1;
431
432 scan_val |= (bits << KEYP_SCAN_DBOUNCE_SHIFT);
433
434 bits = fls(kp->pdata->scan_delay_ms) - 1;
435 scan_val |= (bits << KEYP_SCAN_PAUSE_SHIFT);
436
437
438 cycles = (kp->pdata->row_hold_ns * KEYP_CLOCK_FREQ) / NSEC_PER_SEC;
439
440 scan_val |= (cycles << KEYP_SCAN_ROW_HOLD_SHIFT);
441
442 rc = pmic8xxx_kp_write_u8(kp, scan_val, KEYP_SCAN);
443 if (rc)
444 dev_err(kp->dev, "Error writing KEYP_SCAN reg, rc=%d\n", rc);
445
446 return rc;
447
448}
449
450static int pmic8xxx_kp_config_gpio(int gpio_start, int num_gpios,
451 struct pmic8xxx_kp *kp, struct pm_gpio *gpio_config)
452{
453 int rc, i;
454
455 if (gpio_start < 0 || num_gpios < 0)
456 return -EINVAL;
457
458 for (i = 0; i < num_gpios; i++) {
459 rc = pm8xxx_gpio_config(gpio_start + i, gpio_config);
460 if (rc) {
461 dev_err(kp->dev, "%s: FAIL pm8xxx_gpio_config():"
462 "for PM GPIO [%d] rc=%d.\n",
463 __func__, gpio_start + i, rc);
464 return rc;
465 }
466 }
467
468 return 0;
469}
470
471static int pmic8xxx_kp_enable(struct pmic8xxx_kp *kp)
472{
473 int rc;
474
475 kp->ctrl_reg |= KEYP_CTRL_KEYP_EN;
476
477 rc = pmic8xxx_kp_write_u8(kp, kp->ctrl_reg, KEYP_CTRL);
478 if (rc < 0)
479 dev_err(kp->dev, "Error writing KEYP_CTRL reg, rc=%d\n", rc);
480
481 return rc;
482}
483
484static int pmic8xxx_kp_disable(struct pmic8xxx_kp *kp)
485{
486 int rc;
487
488 kp->ctrl_reg &= ~KEYP_CTRL_KEYP_EN;
489
490 rc = pmic8xxx_kp_write_u8(kp, kp->ctrl_reg, KEYP_CTRL);
491 if (rc < 0)
492 return rc;
493
494 return rc;
495}
496
497static int pmic8xxx_kp_open(struct input_dev *dev)
498{
499 struct pmic8xxx_kp *kp = input_get_drvdata(dev);
500
501 return pmic8xxx_kp_enable(kp);
502}
503
504static void pmic8xxx_kp_close(struct input_dev *dev)
505{
506 struct pmic8xxx_kp *kp = input_get_drvdata(dev);
507
508 pmic8xxx_kp_disable(kp);
509}
510
511
512
513
514
515
516
517
518
519
520
521static int pmic8xxx_kp_probe(struct platform_device *pdev)
522{
523 const struct pm8xxx_keypad_platform_data *pdata =
524 dev_get_platdata(&pdev->dev);
525 const struct matrix_keymap_data *keymap_data;
526 struct pmic8xxx_kp *kp;
527 int rc;
528 u8 ctrl_val;
529
530 struct pm_gpio kypd_drv = {
531 .direction = PM_GPIO_DIR_OUT,
532 .output_buffer = PM_GPIO_OUT_BUF_OPEN_DRAIN,
533 .output_value = 0,
534 .pull = PM_GPIO_PULL_NO,
535 .vin_sel = PM_GPIO_VIN_S3,
536 .out_strength = PM_GPIO_STRENGTH_LOW,
537 .function = PM_GPIO_FUNC_1,
538 .inv_int_pol = 1,
539 };
540
541 struct pm_gpio kypd_sns = {
542 .direction = PM_GPIO_DIR_IN,
543 .pull = PM_GPIO_PULL_UP_31P5,
544 .vin_sel = PM_GPIO_VIN_S3,
545 .out_strength = PM_GPIO_STRENGTH_NO,
546 .function = PM_GPIO_FUNC_NORMAL,
547 .inv_int_pol = 1,
548 };
549
550
551 if (!pdata || !pdata->num_cols || !pdata->num_rows ||
552 pdata->num_cols > PM8XXX_MAX_COLS ||
553 pdata->num_rows > PM8XXX_MAX_ROWS ||
554 pdata->num_cols < PM8XXX_MIN_COLS) {
555 dev_err(&pdev->dev, "invalid platform data\n");
556 return -EINVAL;
557 }
558
559 if (!pdata->scan_delay_ms ||
560 pdata->scan_delay_ms > MAX_SCAN_DELAY ||
561 pdata->scan_delay_ms < MIN_SCAN_DELAY ||
562 !is_power_of_2(pdata->scan_delay_ms)) {
563 dev_err(&pdev->dev, "invalid keypad scan time supplied\n");
564 return -EINVAL;
565 }
566
567 if (!pdata->row_hold_ns ||
568 pdata->row_hold_ns > MAX_ROW_HOLD_DELAY ||
569 pdata->row_hold_ns < MIN_ROW_HOLD_DELAY ||
570 ((pdata->row_hold_ns % MIN_ROW_HOLD_DELAY) != 0)) {
571 dev_err(&pdev->dev, "invalid keypad row hold time supplied\n");
572 return -EINVAL;
573 }
574
575 if (!pdata->debounce_ms ||
576 ((pdata->debounce_ms % 5) != 0) ||
577 pdata->debounce_ms > MAX_DEBOUNCE_TIME ||
578 pdata->debounce_ms < MIN_DEBOUNCE_TIME) {
579 dev_err(&pdev->dev, "invalid debounce time supplied\n");
580 return -EINVAL;
581 }
582
583 keymap_data = pdata->keymap_data;
584 if (!keymap_data) {
585 dev_err(&pdev->dev, "no keymap data supplied\n");
586 return -EINVAL;
587 }
588
589 kp = kzalloc(sizeof(*kp), GFP_KERNEL);
590 if (!kp)
591 return -ENOMEM;
592
593 platform_set_drvdata(pdev, kp);
594
595 kp->pdata = pdata;
596 kp->dev = &pdev->dev;
597
598 kp->input = input_allocate_device();
599 if (!kp->input) {
600 dev_err(&pdev->dev, "unable to allocate input device\n");
601 rc = -ENOMEM;
602 goto err_alloc_device;
603 }
604
605 kp->key_sense_irq = platform_get_irq(pdev, 0);
606 if (kp->key_sense_irq < 0) {
607 dev_err(&pdev->dev, "unable to get keypad sense irq\n");
608 rc = -ENXIO;
609 goto err_get_irq;
610 }
611
612 kp->key_stuck_irq = platform_get_irq(pdev, 1);
613 if (kp->key_stuck_irq < 0) {
614 dev_err(&pdev->dev, "unable to get keypad stuck irq\n");
615 rc = -ENXIO;
616 goto err_get_irq;
617 }
618
619 kp->input->name = pdata->input_name ? : "PMIC8XXX keypad";
620 kp->input->phys = pdata->input_phys_device ? : "pmic8xxx_keypad/input0";
621
622 kp->input->dev.parent = &pdev->dev;
623
624 kp->input->id.bustype = BUS_I2C;
625 kp->input->id.version = 0x0001;
626 kp->input->id.product = 0x0001;
627 kp->input->id.vendor = 0x0001;
628
629 kp->input->open = pmic8xxx_kp_open;
630 kp->input->close = pmic8xxx_kp_close;
631
632 rc = matrix_keypad_build_keymap(keymap_data, NULL,
633 PM8XXX_MAX_ROWS, PM8XXX_MAX_COLS,
634 kp->keycodes, kp->input);
635 if (rc) {
636 dev_err(&pdev->dev, "failed to build keymap\n");
637 goto err_get_irq;
638 }
639
640 if (pdata->rep)
641 __set_bit(EV_REP, kp->input->evbit);
642 input_set_capability(kp->input, EV_MSC, MSC_SCAN);
643
644 input_set_drvdata(kp->input, kp);
645
646
647 memset(kp->keystate, 0xff, sizeof(kp->keystate));
648 memset(kp->stuckstate, 0xff, sizeof(kp->stuckstate));
649
650 rc = pmic8xxx_kpd_init(kp);
651 if (rc < 0) {
652 dev_err(&pdev->dev, "unable to initialize keypad controller\n");
653 goto err_get_irq;
654 }
655
656 rc = pmic8xxx_kp_config_gpio(pdata->cols_gpio_start,
657 pdata->num_cols, kp, &kypd_sns);
658 if (rc < 0) {
659 dev_err(&pdev->dev, "unable to configure keypad sense lines\n");
660 goto err_gpio_config;
661 }
662
663 rc = pmic8xxx_kp_config_gpio(pdata->rows_gpio_start,
664 pdata->num_rows, kp, &kypd_drv);
665 if (rc < 0) {
666 dev_err(&pdev->dev, "unable to configure keypad drive lines\n");
667 goto err_gpio_config;
668 }
669
670 rc = request_any_context_irq(kp->key_sense_irq, pmic8xxx_kp_irq,
671 IRQF_TRIGGER_RISING, "pmic-keypad", kp);
672 if (rc < 0) {
673 dev_err(&pdev->dev, "failed to request keypad sense irq\n");
674 goto err_get_irq;
675 }
676
677 rc = request_any_context_irq(kp->key_stuck_irq, pmic8xxx_kp_stuck_irq,
678 IRQF_TRIGGER_RISING, "pmic-keypad-stuck", kp);
679 if (rc < 0) {
680 dev_err(&pdev->dev, "failed to request keypad stuck irq\n");
681 goto err_req_stuck_irq;
682 }
683
684 rc = pmic8xxx_kp_read_u8(kp, &ctrl_val, KEYP_CTRL);
685 if (rc < 0) {
686 dev_err(&pdev->dev, "failed to read KEYP_CTRL register\n");
687 goto err_pmic_reg_read;
688 }
689
690 kp->ctrl_reg = ctrl_val;
691
692 rc = input_register_device(kp->input);
693 if (rc < 0) {
694 dev_err(&pdev->dev, "unable to register keypad input device\n");
695 goto err_pmic_reg_read;
696 }
697
698 device_init_wakeup(&pdev->dev, pdata->wakeup);
699
700 return 0;
701
702err_pmic_reg_read:
703 free_irq(kp->key_stuck_irq, kp);
704err_req_stuck_irq:
705 free_irq(kp->key_sense_irq, kp);
706err_gpio_config:
707err_get_irq:
708 input_free_device(kp->input);
709err_alloc_device:
710 platform_set_drvdata(pdev, NULL);
711 kfree(kp);
712 return rc;
713}
714
715static int pmic8xxx_kp_remove(struct platform_device *pdev)
716{
717 struct pmic8xxx_kp *kp = platform_get_drvdata(pdev);
718
719 device_init_wakeup(&pdev->dev, 0);
720 free_irq(kp->key_stuck_irq, kp);
721 free_irq(kp->key_sense_irq, kp);
722 input_unregister_device(kp->input);
723 kfree(kp);
724
725 platform_set_drvdata(pdev, NULL);
726 return 0;
727}
728
729#ifdef CONFIG_PM_SLEEP
730static int pmic8xxx_kp_suspend(struct device *dev)
731{
732 struct platform_device *pdev = to_platform_device(dev);
733 struct pmic8xxx_kp *kp = platform_get_drvdata(pdev);
734 struct input_dev *input_dev = kp->input;
735
736 if (device_may_wakeup(dev)) {
737 enable_irq_wake(kp->key_sense_irq);
738 } else {
739 mutex_lock(&input_dev->mutex);
740
741 if (input_dev->users)
742 pmic8xxx_kp_disable(kp);
743
744 mutex_unlock(&input_dev->mutex);
745 }
746
747 return 0;
748}
749
750static int pmic8xxx_kp_resume(struct device *dev)
751{
752 struct platform_device *pdev = to_platform_device(dev);
753 struct pmic8xxx_kp *kp = platform_get_drvdata(pdev);
754 struct input_dev *input_dev = kp->input;
755
756 if (device_may_wakeup(dev)) {
757 disable_irq_wake(kp->key_sense_irq);
758 } else {
759 mutex_lock(&input_dev->mutex);
760
761 if (input_dev->users)
762 pmic8xxx_kp_enable(kp);
763
764 mutex_unlock(&input_dev->mutex);
765 }
766
767 return 0;
768}
769#endif
770
771static SIMPLE_DEV_PM_OPS(pm8xxx_kp_pm_ops,
772 pmic8xxx_kp_suspend, pmic8xxx_kp_resume);
773
774static struct platform_driver pmic8xxx_kp_driver = {
775 .probe = pmic8xxx_kp_probe,
776 .remove = pmic8xxx_kp_remove,
777 .driver = {
778 .name = PM8XXX_KEYPAD_DEV_NAME,
779 .owner = THIS_MODULE,
780 .pm = &pm8xxx_kp_pm_ops,
781 },
782};
783module_platform_driver(pmic8xxx_kp_driver);
784
785MODULE_LICENSE("GPL v2");
786MODULE_DESCRIPTION("PMIC8XXX keypad driver");
787MODULE_VERSION("1.0");
788MODULE_ALIAS("platform:pmic8xxx_keypad");
789MODULE_AUTHOR("Trilok Soni <tsoni@codeaurora.org>");
790
