pxa27x_keypad.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * linux/drivers/input/keyboard/pxa27x_keypad.c
  4 *
  5 * Driver for the pxa27x matrix keyboard controller.
  6 *
  7 * Created:	Feb 22, 2007
  8 * Author:	Rodolfo Giometti <giometti@linux.it>
  9 *
 10 * Based on a previous implementations by Kevin O'Connor
 11 * <kevin_at_koconnor.net> and Alex Osborne <bobofdoom@gmail.com> and
 12 * on some suggestions by Nicolas Pitre <nico@fluxnic.net>.
 13 */
 14
 15#include <linux/bits.h>
 16#include <linux/bitfield.h>
 17#include <linux/kernel.h>
 18#include <linux/module.h>
 19#include <linux/interrupt.h>
 20#include <linux/input.h>
 21#include <linux/io.h>
 22#include <linux/device.h>
 23#include <linux/platform_device.h>
 24#include <linux/property.h>
 25#include <linux/clk.h>
 26#include <linux/err.h>
 27#include <linux/input/matrix_keypad.h>
 28#include <linux/slab.h>
 29#include <linux/of.h>
 30
 31/*
 32 * Keypad Controller registers
 33 */
 34#define KPC		0x0000 /* Keypad Control register */
 35#define KPDK		0x0008 /* Keypad Direct Key register */
 36#define KPREC		0x0010 /* Keypad Rotary Encoder register */
 37#define KPMK		0x0018 /* Keypad Matrix Key register */
 38#define KPAS		0x0020 /* Keypad Automatic Scan register */
 39
 40/* Keypad Automatic Scan Multiple Key Presser register 0-3 */
 41#define KPASMKP0	0x0028
 42#define KPASMKP1	0x0030
 43#define KPASMKP2	0x0038
 44#define KPASMKP3	0x0040
 45#define KPKDI		0x0048
 46
 47/* bit definitions */
 48#define KPC_MKRN_MASK	GENMASK(28, 26)
 49#define KPC_MKCN_MASK	GENMASK(25, 23)
 50#define KPC_DKN_MASK	GENMASK(8, 6)
 51#define KPC_MKRN(n)	FIELD_PREP(KPC_MKRN_MASK, (n) - 1)
 52#define KPC_MKCN(n)	FIELD_PREP(KPC_MKCN_MASK, (n) - 1)
 53#define KPC_DKN(n)	FIELD_PREP(KPC_DKN_MASK, (n) - 1)
 54
 55#define KPC_AS		BIT(30)  /* Automatic Scan bit */
 56#define KPC_ASACT	BIT(29)  /* Automatic Scan on Activity */
 57#define KPC_MI		BIT(22)  /* Matrix interrupt bit */
 58#define KPC_IMKP	BIT(21)  /* Ignore Multiple Key Press */
 59
 60#define KPC_MS(n)	BIT(13 + (n))	/* Matrix scan line 'n' */
 61#define KPC_MS_ALL	GENMASK(20, 13)
 62
 63#define KPC_ME		BIT(12)  /* Matrix Keypad Enable */
 64#define KPC_MIE		BIT(11)  /* Matrix Interrupt Enable */
 65#define KPC_DK_DEB_SEL	BIT(9)   /* Direct Keypad Debounce Select */
 66#define KPC_DI		BIT(5)   /* Direct key interrupt bit */
 67#define KPC_RE_ZERO_DEB	BIT(4)   /* Rotary Encoder Zero Debounce */
 68#define KPC_REE1	BIT(3)   /* Rotary Encoder1 Enable */
 69#define KPC_REE0	BIT(2)   /* Rotary Encoder0 Enable */
 70#define KPC_DE		BIT(1)   /* Direct Keypad Enable */
 71#define KPC_DIE		BIT(0)   /* Direct Keypad interrupt Enable */
 72
 73#define KPDK_DKP	BIT(31)
 74#define KPDK_DK_MASK	GENMASK(7, 0)
 75#define KPDK_DK(n)	FIELD_GET(KPDK_DK_MASK, n)
 76
 77#define KPREC_OF1	BIT(31)
 78#define KPREC_UF1	BIT(30)
 79#define KPREC_OF0	BIT(15)
 80#define KPREC_UF0	BIT(14)
 81
 82#define KPREC_RECOUNT0_MASK	GENMASK(7, 0)
 83#define KPREC_RECOUNT1_MASK	GENMASK(23, 16)
 84#define KPREC_RECOUNT0(n)	FIELD_GET(KPREC_RECOUNT0_MASK, n)
 85#define KPREC_RECOUNT1(n)	FIELD_GET(KPREC_RECOUNT1_MASK, n)
 86
 87#define KPMK_MKP	BIT(31)
 88#define KPAS_SO		BIT(31)
 89#define KPASMKPx_SO	BIT(31)
 90
 91#define KPAS_MUKP_MASK	GENMASK(30, 26)
 92#define KPAS_RP_MASK	GENMASK(7, 4)
 93#define KPAS_CP_MASK	GENMASK(3, 0)
 94#define KPAS_MUKP(n)	FIELD_GET(KPAS_MUKP_MASK, n)
 95#define KPAS_RP(n)	FIELD_GET(KPAS_RP_MASK, n)
 96#define KPAS_CP(n)	FIELD_GET(KPAS_CP_MASK, n)
 97
 98#define KPASMKP_MKC_MASK	GENMASK(7, 0)
 99
100#define keypad_readl(off)	__raw_readl(keypad->mmio_base + (off))
101#define keypad_writel(off, v)	__raw_writel((v), keypad->mmio_base + (off))
102
103#define MAX_MATRIX_KEY_ROWS	8
104#define MAX_MATRIX_KEY_COLS	8
105#define MAX_DIRECT_KEY_NUM	8
106#define MAX_ROTARY_ENCODERS	2
107
108#define MAX_MATRIX_KEY_NUM	(MAX_MATRIX_KEY_ROWS * MAX_MATRIX_KEY_COLS)
109#define MAX_KEYPAD_KEYS		(MAX_MATRIX_KEY_NUM + MAX_DIRECT_KEY_NUM)
110
111struct pxa27x_keypad_rotary {
112	unsigned short *key_codes;
113	int rel_code;
114	bool enabled;
115};
116
117struct pxa27x_keypad {
118	struct clk *clk;
119	struct input_dev *input_dev;
120	void __iomem *mmio_base;
121
122	int irq;
123
124	unsigned int matrix_key_rows;
125	unsigned int matrix_key_cols;
126	unsigned int row_shift;
127
128	unsigned int direct_key_num;
129	unsigned int direct_key_mask;
130	bool direct_key_low_active;
131
132	/* key debounce interval */
133	unsigned int debounce_interval;
134
135	unsigned short keycodes[MAX_KEYPAD_KEYS];
136
137	/* state row bits of each column scan */
138	u32 matrix_key_state[MAX_MATRIX_KEY_COLS];
139	u32 direct_key_state;
140
141	struct pxa27x_keypad_rotary rotary[MAX_ROTARY_ENCODERS];
142};
143
144static int pxa27x_keypad_matrix_key_parse(struct pxa27x_keypad *keypad)
145{
146	struct input_dev *input_dev = keypad->input_dev;
147	struct device *dev = input_dev->dev.parent;
148	int error;
149
150	error = matrix_keypad_parse_properties(dev, &keypad->matrix_key_rows,
151					       &keypad->matrix_key_cols);
152	if (error)
153		return error;
154
155	if (keypad->matrix_key_rows > MAX_MATRIX_KEY_ROWS ||
156	    keypad->matrix_key_cols > MAX_MATRIX_KEY_COLS) {
157		dev_err(dev, "rows or cols exceeds maximum value\n");
158		return -EINVAL;
159	}
160
161	keypad->row_shift = get_count_order(keypad->matrix_key_cols);
162
163	error = matrix_keypad_build_keymap(NULL, NULL,
164					   keypad->matrix_key_rows,
165					   keypad->matrix_key_cols,
166					   keypad->keycodes, input_dev);
167	if (error)
168		return error;
169
170	return 0;
171}
172
173static int pxa27x_keypad_direct_key_parse(struct pxa27x_keypad *keypad)
174{
175	struct input_dev *input_dev = keypad->input_dev;
176	struct device *dev = input_dev->dev.parent;
177	unsigned short code;
178	int count;
179	int i;
180	int error;
181
182	error = device_property_read_u32(dev, "marvell,direct-key-count",
183					 &keypad->direct_key_num);
184	if (error) {
185		/*
186		 * If do not have marvel,direct-key-count defined,
187		 * it means direct key is not supported.
188		 */
189		return error == -EINVAL ? 0 : error;
190	}
191
192	error = device_property_read_u32(dev, "marvell,direct-key-mask",
193					 &keypad->direct_key_mask);
194	if (error) {
195		if (error != -EINVAL)
196			return error;
197
198		/*
199		 * If marvell,direct-key-mask is not defined, driver will use
200		 * a default value based on number of direct keys set up.
201		 * The default value is calculated in pxa27x_keypad_config().
202		 */
203		keypad->direct_key_mask = 0;
204	}
205
206	keypad->direct_key_low_active =
207		device_property_read_bool(dev, "marvell,direct-key-low-active");
208
209	count = device_property_count_u16(dev, "marvell,direct-key-map");
210	if (count <= 0 || count > MAX_DIRECT_KEY_NUM)
211		return -EINVAL;
212
213	error = device_property_read_u16_array(dev, "marvell,direct-key-map",
214					       &keypad->keycodes[MAX_MATRIX_KEY_NUM],
215					       count);
216
217	for (i = 0; i < count; i++) {
218		code = keypad->keycodes[MAX_MATRIX_KEY_NUM + i];
219		__set_bit(code, input_dev->keybit);
220	}
221
222	return 0;
223}
224
225static int pxa27x_keypad_rotary_parse(struct pxa27x_keypad *keypad)
226{
227	static const char * const rotaryname[] = { "marvell,rotary0", "marvell,rotary1" };
228	struct input_dev *input_dev = keypad->input_dev;
229	struct device *dev = input_dev->dev.parent;
230	struct pxa27x_keypad_rotary *encoder;
231	unsigned int code;
232	int i;
233	int error;
234
235	error = device_property_read_u32(dev, "marvell,rotary-rel-key", &code);
236	if (!error) {
237		for (i = 0; i < MAX_ROTARY_ENCODERS; i++, code >>= 16) {
238			encoder = &keypad->rotary[i];
239			encoder->enabled = true;
240			encoder->rel_code = code & 0xffff;
241			input_set_capability(input_dev, EV_REL, encoder->rel_code);
242		}
243
244		return 0;
245	}
246
247	for (i = 0; i < MAX_ROTARY_ENCODERS; i++) {
248		encoder = &keypad->rotary[i];
249
250		/*
251		 * If the prop is not set, it means keypad does not need
252		 * initialize the rotaryX.
253		 */
254		if (!device_property_present(dev, rotaryname[i]))
255			continue;
256
257		error = device_property_read_u32(dev, rotaryname[i], &code);
258		if (error)
259			return error;
260
261		/*
262		 * Not all up/down key code are valid.
263		 * Now we depends on direct-rel-code.
264		 */
265		if (!(code & 0xffff) || !(code >> 16))
266			return -EINVAL;
267
268		encoder->enabled = true;
269		encoder->rel_code = -1;
270		encoder->key_codes = &keypad->keycodes[MAX_MATRIX_KEY_NUM + i * 2];
271		encoder->key_codes[0] = code & 0xffff;
272		encoder->key_codes[1] = code >> 16;
273
274		input_set_capability(input_dev, EV_KEY, encoder->key_codes[0]);
275		input_set_capability(input_dev, EV_KEY, encoder->key_codes[1]);
276	}
277
278	return 0;
279}
280
281static int pxa27x_keypad_parse_properties(struct pxa27x_keypad *keypad)
282{
283	struct input_dev *input_dev = keypad->input_dev;
284	struct device *dev = input_dev->dev.parent;
285	int error;
286
287	error = pxa27x_keypad_matrix_key_parse(keypad);
288	if (error) {
289		dev_err(dev, "failed to parse matrix key\n");
290		return error;
291	}
292
293	error = pxa27x_keypad_direct_key_parse(keypad);
294	if (error) {
295		dev_err(dev, "failed to parse direct key\n");
296		return error;
297	}
298
299	error = pxa27x_keypad_rotary_parse(keypad);
300	if (error) {
301		dev_err(dev, "failed to parse rotary key\n");
302		return error;
303	}
304
305	error = device_property_read_u32(dev, "marvell,debounce-interval",
306					 &keypad->debounce_interval);
307	if (error) {
308		dev_err(dev, "failed to parse debounce-interval\n");
309		return error;
310	}
311
312	/*
313	 * The keycodes may not only includes matrix key but also the direct
314	 * key or rotary key.
315	 */
316	input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes);
317
318	return 0;
319}
320
321static void pxa27x_keypad_scan_matrix(struct pxa27x_keypad *keypad)
322{
323	struct input_dev *input_dev = keypad->input_dev;
324	int row, col, num_keys_pressed = 0;
325	u32 new_state[MAX_MATRIX_KEY_COLS];
326	u32 kpas = keypad_readl(KPAS);
327
328	num_keys_pressed = KPAS_MUKP(kpas);
329
330	memset(new_state, 0, sizeof(new_state));
331
332	if (num_keys_pressed == 0)
333		goto scan;
334
335	if (num_keys_pressed == 1) {
336		col = KPAS_CP(kpas);
337		row = KPAS_RP(kpas);
338
339		/* if invalid row/col, treat as no key pressed */
340		if (col >= keypad->matrix_key_cols ||
341		    row >= keypad->matrix_key_rows)
342			goto scan;
343
344		new_state[col] = BIT(row);
345		goto scan;
346	}
347
348	if (num_keys_pressed > 1) {
349		u32 kpasmkp0 = keypad_readl(KPASMKP0);
350		u32 kpasmkp1 = keypad_readl(KPASMKP1);
351		u32 kpasmkp2 = keypad_readl(KPASMKP2);
352		u32 kpasmkp3 = keypad_readl(KPASMKP3);
353
354		new_state[0] = kpasmkp0 & KPASMKP_MKC_MASK;
355		new_state[1] = (kpasmkp0 >> 16) & KPASMKP_MKC_MASK;
356		new_state[2] = kpasmkp1 & KPASMKP_MKC_MASK;
357		new_state[3] = (kpasmkp1 >> 16) & KPASMKP_MKC_MASK;
358		new_state[4] = kpasmkp2 & KPASMKP_MKC_MASK;
359		new_state[5] = (kpasmkp2 >> 16) & KPASMKP_MKC_MASK;
360		new_state[6] = kpasmkp3 & KPASMKP_MKC_MASK;
361		new_state[7] = (kpasmkp3 >> 16) & KPASMKP_MKC_MASK;
362	}
363scan:
364	for (col = 0; col < keypad->matrix_key_cols; col++) {
365		u32 bits_changed;
366		int code;
367
368		bits_changed = keypad->matrix_key_state[col] ^ new_state[col];
369		if (bits_changed == 0)
370			continue;
371
372		for (row = 0; row < keypad->matrix_key_rows; row++) {
373			if ((bits_changed & BIT(row)) == 0)
374				continue;
375
376			code = MATRIX_SCAN_CODE(row, col, keypad->row_shift);
377
378			input_event(input_dev, EV_MSC, MSC_SCAN, code);
379			input_report_key(input_dev, keypad->keycodes[code],
380					 new_state[col] & BIT(row));
381		}
382	}
383	input_sync(input_dev);
384	memcpy(keypad->matrix_key_state, new_state, sizeof(new_state));
385}
386
387#define DEFAULT_KPREC	(0x007f007f)
388
389static inline int rotary_delta(u32 kprec)
390{
391	if (kprec & KPREC_OF0)
392		return (kprec & 0xff) + 0x7f;
393	else if (kprec & KPREC_UF0)
394		return (kprec & 0xff) - 0x7f - 0xff;
395	else
396		return (kprec & 0xff) - 0x7f;
397}
398
399static void report_rotary_event(struct pxa27x_keypad *keypad, int r, int delta)
400{
401	struct pxa27x_keypad_rotary *encoder = &keypad->rotary[r];
402	struct input_dev *dev = keypad->input_dev;
403
404	if (!encoder->enabled || delta == 0)
405		return;
406
407	if (encoder->rel_code == -1) {
408		int idx = delta > 0 ? 0 : 1;
409		int code = MAX_MATRIX_KEY_NUM + 2 * r + idx;
410		unsigned char keycode = encoder->key_codes[idx];
411
412		/* simulate a press-n-release */
413		input_event(dev, EV_MSC, MSC_SCAN, code);
414		input_report_key(dev, keycode, 1);
415		input_sync(dev);
416		input_event(dev, EV_MSC, MSC_SCAN, code);
417		input_report_key(dev, keycode, 0);
418		input_sync(dev);
419	} else {
420		input_report_rel(dev, encoder->rel_code, delta);
421		input_sync(dev);
422	}
423}
424
425static void pxa27x_keypad_scan_rotary(struct pxa27x_keypad *keypad)
426{
427	u32 kprec;
428	int i;
429
430	/* read and reset to default count value */
431	kprec = keypad_readl(KPREC);
432	keypad_writel(KPREC, DEFAULT_KPREC);
433
434	for (i = 0; i < MAX_ROTARY_ENCODERS; i++) {
435		report_rotary_event(keypad, 0, rotary_delta(kprec));
436		kprec >>= 16;
437	}
438}
439
440static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad)
441{
442	struct input_dev *input_dev = keypad->input_dev;
443	unsigned int new_state;
444	u32 kpdk, bits_changed;
445	int i;
446
447	kpdk = keypad_readl(KPDK);
448
449	if (keypad->rotary[0].enabled || keypad->rotary[1].enabled)
450		pxa27x_keypad_scan_rotary(keypad);
451
452	/*
453	 * The KPDR_DK only output the key pin level, so it relates to board,
454	 * and low level may be active.
455	 */
456	if (keypad->direct_key_low_active)
457		new_state = ~KPDK_DK(kpdk) & keypad->direct_key_mask;
458	else
459		new_state = KPDK_DK(kpdk) & keypad->direct_key_mask;
460
461	bits_changed = keypad->direct_key_state ^ new_state;
462
463	if (bits_changed == 0)
464		return;
465
466	for (i = 0; i < keypad->direct_key_num; i++) {
467		if (bits_changed & BIT(i)) {
468			int code = MAX_MATRIX_KEY_NUM + i;
469
470			input_event(input_dev, EV_MSC, MSC_SCAN, code);
471			input_report_key(input_dev, keypad->keycodes[code],
472					 new_state & BIT(i));
473		}
474	}
475	input_sync(input_dev);
476	keypad->direct_key_state = new_state;
477}
478
479static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id)
480{
481	struct pxa27x_keypad *keypad = dev_id;
482	unsigned long kpc = keypad_readl(KPC);
483
484	if (kpc & KPC_DI)
485		pxa27x_keypad_scan_direct(keypad);
486
487	if (kpc & KPC_MI)
488		pxa27x_keypad_scan_matrix(keypad);
489
490	return IRQ_HANDLED;
491}
492
493static void pxa27x_keypad_config(struct pxa27x_keypad *keypad)
494{
495	unsigned int mask = 0, direct_key_num = 0;
496	unsigned long kpc = 0;
497
498	/* clear pending interrupt bit */
499	keypad_readl(KPC);
500
501	/* enable matrix keys with automatic scan */
502	if (keypad->matrix_key_rows && keypad->matrix_key_cols) {
503		kpc |= KPC_ASACT | KPC_MIE | KPC_ME | KPC_MS_ALL;
504		kpc |= KPC_MKRN(keypad->matrix_key_rows) |
505		       KPC_MKCN(keypad->matrix_key_cols);
506	}
507
508	/* enable rotary key, debounce interval same as direct keys */
509	if (keypad->rotary[0].enabled) {
510		mask |= 0x03;
511		direct_key_num = 2;
512		kpc |= KPC_REE0;
513	}
514
515	if (keypad->rotary[1].enabled) {
516		mask |= 0x0c;
517		direct_key_num = 4;
518		kpc |= KPC_REE1;
519	}
520
521	if (keypad->direct_key_num > direct_key_num)
522		direct_key_num = keypad->direct_key_num;
523
524	/*
525	 * Direct keys usage may not start from KP_DKIN0, check the platfrom
526	 * mask data to config the specific.
527	 */
528	if (!keypad->direct_key_mask)
529		keypad->direct_key_mask = GENMASK(direct_key_num - 1, 0) & ~mask;
530
531	/* enable direct key */
532	if (direct_key_num)
533		kpc |= KPC_DE | KPC_DIE | KPC_DKN(direct_key_num);
534
535	keypad_writel(KPC, kpc | KPC_RE_ZERO_DEB);
536	keypad_writel(KPREC, DEFAULT_KPREC);
537	keypad_writel(KPKDI, keypad->debounce_interval);
538}
539
540static int pxa27x_keypad_open(struct input_dev *dev)
541{
542	struct pxa27x_keypad *keypad = input_get_drvdata(dev);
543	int ret;
544	/* Enable unit clock */
545	ret = clk_prepare_enable(keypad->clk);
546	if (ret)
547		return ret;
548
549	pxa27x_keypad_config(keypad);
550
551	return 0;
552}
553
554static void pxa27x_keypad_close(struct input_dev *dev)
555{
556	struct pxa27x_keypad *keypad = input_get_drvdata(dev);
557
558	/* Disable clock unit */
559	clk_disable_unprepare(keypad->clk);
560}
561
562static int pxa27x_keypad_suspend(struct device *dev)
563{
564	struct platform_device *pdev = to_platform_device(dev);
565	struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
566
567	/*
568	 * If the keypad is used a wake up source, clock can not be disabled.
569	 * Or it can not detect the key pressing.
570	 */
571	if (device_may_wakeup(&pdev->dev))
572		enable_irq_wake(keypad->irq);
573	else
574		clk_disable_unprepare(keypad->clk);
575
576	return 0;
577}
578
579static int pxa27x_keypad_resume(struct device *dev)
580{
581	struct platform_device *pdev = to_platform_device(dev);
582	struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
583	struct input_dev *input_dev = keypad->input_dev;
584	int error;
585
586	/*
587	 * If the keypad is used as wake up source, the clock is not turned
588	 * off. So do not need configure it again.
589	 */
590	if (device_may_wakeup(&pdev->dev)) {
591		disable_irq_wake(keypad->irq);
592	} else {
593		guard(mutex)(&input_dev->mutex);
594
595		if (input_device_enabled(input_dev)) {
596			/* Enable unit clock */
597			error = clk_prepare_enable(keypad->clk);
598			if (error)
599				return error;
600
601			pxa27x_keypad_config(keypad);
602		}
603	}
604
605	return 0;
606}
607
608static DEFINE_SIMPLE_DEV_PM_OPS(pxa27x_keypad_pm_ops,
609				pxa27x_keypad_suspend, pxa27x_keypad_resume);
610
611static int pxa27x_keypad_probe(struct platform_device *pdev)
612{
613	struct pxa27x_keypad *keypad;
614	struct input_dev *input_dev;
615	int irq;
616	int error;
617
618	irq = platform_get_irq(pdev, 0);
619	if (irq < 0)
620		return -ENXIO;
621
622	keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad),
623			      GFP_KERNEL);
624	if (!keypad)
625		return -ENOMEM;
626
627	input_dev = devm_input_allocate_device(&pdev->dev);
628	if (!input_dev)
629		return -ENOMEM;
630
631	keypad->input_dev = input_dev;
632	keypad->irq = irq;
633
634	keypad->mmio_base = devm_platform_ioremap_resource(pdev, 0);
635	if (IS_ERR(keypad->mmio_base))
636		return PTR_ERR(keypad->mmio_base);
637
638	keypad->clk = devm_clk_get(&pdev->dev, NULL);
639	if (IS_ERR(keypad->clk)) {
640		dev_err(&pdev->dev, "failed to get keypad clock\n");
641		return PTR_ERR(keypad->clk);
642	}
643
644	input_dev->name = pdev->name;
645	input_dev->id.bustype = BUS_HOST;
646	input_dev->open = pxa27x_keypad_open;
647	input_dev->close = pxa27x_keypad_close;
648	input_dev->dev.parent = &pdev->dev;
649
650	input_dev->keycode = keypad->keycodes;
651	input_dev->keycodesize = sizeof(keypad->keycodes[0]);
652	input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes);
653
654	input_set_drvdata(input_dev, keypad);
655
656	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
657	input_set_capability(input_dev, EV_MSC, MSC_SCAN);
658
659	error = pxa27x_keypad_parse_properties(keypad);
660	if (error) {
661		dev_err(&pdev->dev, "failed to parse keypad properties\n");
662		return error;
663	}
664
665	error = devm_request_irq(&pdev->dev, irq, pxa27x_keypad_irq_handler,
666				 0, pdev->name, keypad);
667	if (error) {
668		dev_err(&pdev->dev, "failed to request IRQ\n");
669		return error;
670	}
671
672	/* Register the input device */
673	error = input_register_device(input_dev);
674	if (error) {
675		dev_err(&pdev->dev, "failed to register input device\n");
676		return error;
677	}
678
679	platform_set_drvdata(pdev, keypad);
680	device_init_wakeup(&pdev->dev, 1);
681
682	return 0;
683}
684
685#ifdef CONFIG_OF
686static const struct of_device_id pxa27x_keypad_dt_match[] = {
687	{ .compatible = "marvell,pxa27x-keypad" },
688	{},
689};
690MODULE_DEVICE_TABLE(of, pxa27x_keypad_dt_match);
691#endif
692
693static struct platform_driver pxa27x_keypad_driver = {
694	.probe		= pxa27x_keypad_probe,
695	.driver		= {
696		.name	= "pxa27x-keypad",
697		.of_match_table = of_match_ptr(pxa27x_keypad_dt_match),
698		.pm	= pm_sleep_ptr(&pxa27x_keypad_pm_ops),
699	},
700};
701module_platform_driver(pxa27x_keypad_driver);
702
703MODULE_DESCRIPTION("PXA27x Keypad Controller Driver");
704MODULE_LICENSE("GPL");
705/* work with hotplug and coldplug */
706MODULE_ALIAS("platform:pxa27x-keypad");