2 * linux/drivers/input/keyboard/pxa27x_keypad.c
4 * Driver for the pxa27x matrix keyboard controller.
6 * Created: Feb 22, 2007
7 * Author: Rodolfo Giometti <giometti@linux.it>
9 * Based on a previous implementations by Kevin O'Connor
10 * <kevin_at_koconnor.net> and Alex Osborne <bobofdoom@gmail.com> and
11 * on some suggestions by Nicolas Pitre <nico@fluxnic.net>.
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/init.h>
22 #include <linux/interrupt.h>
23 #include <linux/input.h>
24 #include <linux/device.h>
25 #include <linux/platform_device.h>
26 #include <linux/clk.h>
27 #include <linux/err.h>
28 #include <linux/input/matrix_keypad.h>
29 #include <linux/slab.h>
31 #include <asm/mach/arch.h>
32 #include <asm/mach/map.h>
34 #include <mach/hardware.h>
35 #include <linux/platform_data/keypad-pxa27x.h>
37 * Keypad Controller registers
39 #define KPC 0x0000 /* Keypad Control register */
40 #define KPDK 0x0008 /* Keypad Direct Key register */
41 #define KPREC 0x0010 /* Keypad Rotary Encoder register */
42 #define KPMK 0x0018 /* Keypad Matrix Key register */
43 #define KPAS 0x0020 /* Keypad Automatic Scan register */
45 /* Keypad Automatic Scan Multiple Key Presser register 0-3 */
46 #define KPASMKP0 0x0028
47 #define KPASMKP1 0x0030
48 #define KPASMKP2 0x0038
49 #define KPASMKP3 0x0040
53 #define KPC_MKRN(n) ((((n) - 1) & 0x7) << 26) /* matrix key row number */
54 #define KPC_MKCN(n) ((((n) - 1) & 0x7) << 23) /* matrix key column number */
55 #define KPC_DKN(n) ((((n) - 1) & 0x7) << 6) /* direct key number */
57 #define KPC_AS (0x1 << 30) /* Automatic Scan bit */
58 #define KPC_ASACT (0x1 << 29) /* Automatic Scan on Activity */
59 #define KPC_MI (0x1 << 22) /* Matrix interrupt bit */
60 #define KPC_IMKP (0x1 << 21) /* Ignore Multiple Key Press */
62 #define KPC_MS(n) (0x1 << (13 + (n))) /* Matrix scan line 'n' */
63 #define KPC_MS_ALL (0xff << 13)
65 #define KPC_ME (0x1 << 12) /* Matrix Keypad Enable */
66 #define KPC_MIE (0x1 << 11) /* Matrix Interrupt Enable */
67 #define KPC_DK_DEB_SEL (0x1 << 9) /* Direct Keypad Debounce Select */
68 #define KPC_DI (0x1 << 5) /* Direct key interrupt bit */
69 #define KPC_RE_ZERO_DEB (0x1 << 4) /* Rotary Encoder Zero Debounce */
70 #define KPC_REE1 (0x1 << 3) /* Rotary Encoder1 Enable */
71 #define KPC_REE0 (0x1 << 2) /* Rotary Encoder0 Enable */
72 #define KPC_DE (0x1 << 1) /* Direct Keypad Enable */
73 #define KPC_DIE (0x1 << 0) /* Direct Keypad interrupt Enable */
75 #define KPDK_DKP (0x1 << 31)
76 #define KPDK_DK(n) ((n) & 0xff)
78 #define KPREC_OF1 (0x1 << 31)
79 #define kPREC_UF1 (0x1 << 30)
80 #define KPREC_OF0 (0x1 << 15)
81 #define KPREC_UF0 (0x1 << 14)
83 #define KPREC_RECOUNT0(n) ((n) & 0xff)
84 #define KPREC_RECOUNT1(n) (((n) >> 16) & 0xff)
86 #define KPMK_MKP (0x1 << 31)
87 #define KPAS_SO (0x1 << 31)
88 #define KPASMKPx_SO (0x1 << 31)
90 #define KPAS_MUKP(n) (((n) >> 26) & 0x1f)
91 #define KPAS_RP(n) (((n) >> 4) & 0xf)
92 #define KPAS_CP(n) ((n) & 0xf)
94 #define KPASMKP_MKC_MASK (0xff)
96 #define keypad_readl(off) __raw_readl(keypad->mmio_base + (off))
97 #define keypad_writel(off, v) __raw_writel((v), keypad->mmio_base + (off))
99 #define MAX_MATRIX_KEY_NUM (MAX_MATRIX_KEY_ROWS * MAX_MATRIX_KEY_COLS)
100 #define MAX_KEYPAD_KEYS (MAX_MATRIX_KEY_NUM + MAX_DIRECT_KEY_NUM)
102 struct pxa27x_keypad {
103 struct pxa27x_keypad_platform_data *pdata;
106 struct input_dev *input_dev;
107 void __iomem *mmio_base;
111 unsigned short keycodes[MAX_KEYPAD_KEYS];
112 int rotary_rel_code[2];
114 /* state row bits of each column scan */
115 uint32_t matrix_key_state[MAX_MATRIX_KEY_COLS];
116 uint32_t direct_key_state;
118 unsigned int direct_key_mask;
122 static int pxa27x_keypad_matrix_key_parse_dt(struct pxa27x_keypad *keypad)
124 struct input_dev *input_dev = keypad->input_dev;
125 struct device *dev = input_dev->dev.parent;
126 struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
130 error = matrix_keypad_parse_of_params(dev, &rows, &cols);
134 if (rows > MAX_MATRIX_KEY_ROWS || cols > MAX_MATRIX_KEY_COLS) {
135 dev_err(dev, "rows or cols exceeds maximum value\n");
139 pdata->matrix_key_rows = rows;
140 pdata->matrix_key_cols = cols;
142 error = matrix_keypad_build_keymap(NULL, NULL,
143 pdata->matrix_key_rows,
144 pdata->matrix_key_cols,
145 keypad->keycodes, input_dev);
152 static int pxa27x_keypad_direct_key_parse_dt(struct pxa27x_keypad *keypad)
154 struct input_dev *input_dev = keypad->input_dev;
155 struct device *dev = input_dev->dev.parent;
156 struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
157 struct device_node *np = dev->of_node;
160 unsigned int proplen, size;
164 error = of_property_read_u32(np, "marvell,direct-key-count",
165 &pdata->direct_key_num);
168 * If do not have marvel,direct-key-count defined,
169 * it means direct key is not supported.
171 return error == -EINVAL ? 0 : error;
174 error = of_property_read_u32(np, "marvell,direct-key-mask",
175 &pdata->direct_key_mask);
177 if (error != -EINVAL)
181 * If marvell,direct-key-mask is not defined, driver will use
182 * default value. Default value is set when configure the keypad.
184 pdata->direct_key_mask = 0;
187 pdata->direct_key_low_active = of_property_read_bool(np,
188 "marvell,direct-key-low-active");
190 prop = of_get_property(np, "marvell,direct-key-map", &proplen);
194 if (proplen % sizeof(u16))
197 size = proplen / sizeof(u16);
199 /* Only MAX_DIRECT_KEY_NUM is accepted.*/
200 if (size > MAX_DIRECT_KEY_NUM)
203 for (i = 0; i < size; i++) {
204 code = be16_to_cpup(prop + i);
205 keypad->keycodes[MAX_MATRIX_KEY_NUM + i] = code;
206 __set_bit(code, input_dev->keybit);
212 static int pxa27x_keypad_rotary_parse_dt(struct pxa27x_keypad *keypad)
216 unsigned int code, proplen;
217 const char *rotaryname[2] = {
218 "marvell,rotary0", "marvell,rotary1"};
219 const char relkeyname[] = {"marvell,rotary-rel-key"};
220 struct input_dev *input_dev = keypad->input_dev;
221 struct device *dev = input_dev->dev.parent;
222 struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
223 struct device_node *np = dev->of_node;
225 relkey_ret = of_property_read_u32(np, relkeyname, &code);
226 /* if can read correct rotary key-code, we do not need this. */
227 if (relkey_ret == 0) {
228 unsigned short relcode;
230 /* rotary0 taks lower half, rotary1 taks upper half. */
231 relcode = code & 0xffff;
232 pdata->rotary0_rel_code = (code & 0xffff);
233 __set_bit(relcode, input_dev->relbit);
235 relcode = code >> 16;
236 pdata->rotary1_rel_code = relcode;
237 __set_bit(relcode, input_dev->relbit);
240 for (i = 0; i < 2; i++) {
241 prop = of_get_property(np, rotaryname[i], &proplen);
243 * If the prop is not set, it means keypad does not need
244 * initialize the rotaryX.
249 code = be32_to_cpup(prop);
251 * Not all up/down key code are valid.
252 * Now we depends on direct-rel-code.
254 if ((!(code & 0xffff) || !(code >> 16)) && relkey_ret) {
257 unsigned int n = MAX_MATRIX_KEY_NUM + (i << 1);
258 unsigned short keycode;
260 keycode = code & 0xffff;
261 keypad->keycodes[n] = keycode;
262 __set_bit(keycode, input_dev->keybit);
264 keycode = code >> 16;
265 keypad->keycodes[n + 1] = keycode;
266 __set_bit(keycode, input_dev->keybit);
269 pdata->rotary0_rel_code = -1;
271 pdata->rotary1_rel_code = -1;
274 pdata->enable_rotary0 = 1;
276 pdata->enable_rotary1 = 1;
279 keypad->rotary_rel_code[0] = pdata->rotary0_rel_code;
280 keypad->rotary_rel_code[1] = pdata->rotary1_rel_code;
285 static int pxa27x_keypad_build_keycode_from_dt(struct pxa27x_keypad *keypad)
287 struct input_dev *input_dev = keypad->input_dev;
288 struct device *dev = input_dev->dev.parent;
289 struct device_node *np = dev->of_node;
292 keypad->pdata = devm_kzalloc(dev, sizeof(*keypad->pdata),
294 if (!keypad->pdata) {
295 dev_err(dev, "failed to allocate memory for pdata\n");
299 error = pxa27x_keypad_matrix_key_parse_dt(keypad);
301 dev_err(dev, "failed to parse matrix key\n");
305 error = pxa27x_keypad_direct_key_parse_dt(keypad);
307 dev_err(dev, "failed to parse direct key\n");
311 error = pxa27x_keypad_rotary_parse_dt(keypad);
313 dev_err(dev, "failed to parse rotary key\n");
317 error = of_property_read_u32(np, "marvell,debounce-interval",
318 &keypad->pdata->debounce_interval);
320 dev_err(dev, "failed to parse debpunce-interval\n");
325 * The keycodes may not only includes matrix key but also the direct
328 input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes);
335 static int pxa27x_keypad_build_keycode_from_dt(struct pxa27x_keypad *keypad)
337 dev_info(keypad->input_dev->dev.parent, "missing platform data\n");
344 static int pxa27x_keypad_build_keycode(struct pxa27x_keypad *keypad)
346 struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
347 struct input_dev *input_dev = keypad->input_dev;
348 const struct matrix_keymap_data *keymap_data =
349 pdata ? pdata->matrix_keymap_data : NULL;
350 unsigned short keycode;
354 error = matrix_keypad_build_keymap(keymap_data, NULL,
355 pdata->matrix_key_rows,
356 pdata->matrix_key_cols,
357 keypad->keycodes, input_dev);
362 * The keycodes may not only include matrix keys but also the direct
365 input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes);
367 /* For direct keys. */
368 for (i = 0; i < pdata->direct_key_num; i++) {
369 keycode = pdata->direct_key_map[i];
370 keypad->keycodes[MAX_MATRIX_KEY_NUM + i] = keycode;
371 __set_bit(keycode, input_dev->keybit);
374 if (pdata->enable_rotary0) {
375 if (pdata->rotary0_up_key && pdata->rotary0_down_key) {
376 keycode = pdata->rotary0_up_key;
377 keypad->keycodes[MAX_MATRIX_KEY_NUM + 0] = keycode;
378 __set_bit(keycode, input_dev->keybit);
380 keycode = pdata->rotary0_down_key;
381 keypad->keycodes[MAX_MATRIX_KEY_NUM + 1] = keycode;
382 __set_bit(keycode, input_dev->keybit);
384 keypad->rotary_rel_code[0] = -1;
386 keypad->rotary_rel_code[0] = pdata->rotary0_rel_code;
387 __set_bit(pdata->rotary0_rel_code, input_dev->relbit);
391 if (pdata->enable_rotary1) {
392 if (pdata->rotary1_up_key && pdata->rotary1_down_key) {
393 keycode = pdata->rotary1_up_key;
394 keypad->keycodes[MAX_MATRIX_KEY_NUM + 2] = keycode;
395 __set_bit(keycode, input_dev->keybit);
397 keycode = pdata->rotary1_down_key;
398 keypad->keycodes[MAX_MATRIX_KEY_NUM + 3] = keycode;
399 __set_bit(keycode, input_dev->keybit);
401 keypad->rotary_rel_code[1] = -1;
403 keypad->rotary_rel_code[1] = pdata->rotary1_rel_code;
404 __set_bit(pdata->rotary1_rel_code, input_dev->relbit);
408 __clear_bit(KEY_RESERVED, input_dev->keybit);
413 static void pxa27x_keypad_scan_matrix(struct pxa27x_keypad *keypad)
415 struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
416 struct input_dev *input_dev = keypad->input_dev;
417 int row, col, num_keys_pressed = 0;
418 uint32_t new_state[MAX_MATRIX_KEY_COLS];
419 uint32_t kpas = keypad_readl(KPAS);
421 num_keys_pressed = KPAS_MUKP(kpas);
423 memset(new_state, 0, sizeof(new_state));
425 if (num_keys_pressed == 0)
428 if (num_keys_pressed == 1) {
432 /* if invalid row/col, treat as no key pressed */
433 if (col >= pdata->matrix_key_cols ||
434 row >= pdata->matrix_key_rows)
437 new_state[col] = (1 << row);
441 if (num_keys_pressed > 1) {
442 uint32_t kpasmkp0 = keypad_readl(KPASMKP0);
443 uint32_t kpasmkp1 = keypad_readl(KPASMKP1);
444 uint32_t kpasmkp2 = keypad_readl(KPASMKP2);
445 uint32_t kpasmkp3 = keypad_readl(KPASMKP3);
447 new_state[0] = kpasmkp0 & KPASMKP_MKC_MASK;
448 new_state[1] = (kpasmkp0 >> 16) & KPASMKP_MKC_MASK;
449 new_state[2] = kpasmkp1 & KPASMKP_MKC_MASK;
450 new_state[3] = (kpasmkp1 >> 16) & KPASMKP_MKC_MASK;
451 new_state[4] = kpasmkp2 & KPASMKP_MKC_MASK;
452 new_state[5] = (kpasmkp2 >> 16) & KPASMKP_MKC_MASK;
453 new_state[6] = kpasmkp3 & KPASMKP_MKC_MASK;
454 new_state[7] = (kpasmkp3 >> 16) & KPASMKP_MKC_MASK;
457 for (col = 0; col < pdata->matrix_key_cols; col++) {
458 uint32_t bits_changed;
461 bits_changed = keypad->matrix_key_state[col] ^ new_state[col];
462 if (bits_changed == 0)
465 for (row = 0; row < pdata->matrix_key_rows; row++) {
466 if ((bits_changed & (1 << row)) == 0)
469 code = MATRIX_SCAN_CODE(row, col, MATRIX_ROW_SHIFT);
470 input_event(input_dev, EV_MSC, MSC_SCAN, code);
471 input_report_key(input_dev, keypad->keycodes[code],
472 new_state[col] & (1 << row));
475 input_sync(input_dev);
476 memcpy(keypad->matrix_key_state, new_state, sizeof(new_state));
479 #define DEFAULT_KPREC (0x007f007f)
481 static inline int rotary_delta(uint32_t kprec)
483 if (kprec & KPREC_OF0)
484 return (kprec & 0xff) + 0x7f;
485 else if (kprec & KPREC_UF0)
486 return (kprec & 0xff) - 0x7f - 0xff;
488 return (kprec & 0xff) - 0x7f;
491 static void report_rotary_event(struct pxa27x_keypad *keypad, int r, int delta)
493 struct input_dev *dev = keypad->input_dev;
498 if (keypad->rotary_rel_code[r] == -1) {
499 int code = MAX_MATRIX_KEY_NUM + 2 * r + (delta > 0 ? 0 : 1);
500 unsigned char keycode = keypad->keycodes[code];
502 /* simulate a press-n-release */
503 input_event(dev, EV_MSC, MSC_SCAN, code);
504 input_report_key(dev, keycode, 1);
506 input_event(dev, EV_MSC, MSC_SCAN, code);
507 input_report_key(dev, keycode, 0);
510 input_report_rel(dev, keypad->rotary_rel_code[r], delta);
515 static void pxa27x_keypad_scan_rotary(struct pxa27x_keypad *keypad)
517 struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
520 /* read and reset to default count value */
521 kprec = keypad_readl(KPREC);
522 keypad_writel(KPREC, DEFAULT_KPREC);
524 if (pdata->enable_rotary0)
525 report_rotary_event(keypad, 0, rotary_delta(kprec));
527 if (pdata->enable_rotary1)
528 report_rotary_event(keypad, 1, rotary_delta(kprec >> 16));
531 static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad)
533 struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
534 struct input_dev *input_dev = keypad->input_dev;
535 unsigned int new_state;
536 uint32_t kpdk, bits_changed;
539 kpdk = keypad_readl(KPDK);
541 if (pdata->enable_rotary0 || pdata->enable_rotary1)
542 pxa27x_keypad_scan_rotary(keypad);
545 * The KPDR_DK only output the key pin level, so it relates to board,
546 * and low level may be active.
548 if (pdata->direct_key_low_active)
549 new_state = ~KPDK_DK(kpdk) & keypad->direct_key_mask;
551 new_state = KPDK_DK(kpdk) & keypad->direct_key_mask;
553 bits_changed = keypad->direct_key_state ^ new_state;
555 if (bits_changed == 0)
558 for (i = 0; i < pdata->direct_key_num; i++) {
559 if (bits_changed & (1 << i)) {
560 int code = MAX_MATRIX_KEY_NUM + i;
562 input_event(input_dev, EV_MSC, MSC_SCAN, code);
563 input_report_key(input_dev, keypad->keycodes[code],
564 new_state & (1 << i));
567 input_sync(input_dev);
568 keypad->direct_key_state = new_state;
571 static void clear_wakeup_event(struct pxa27x_keypad *keypad)
573 struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
575 if (pdata->clear_wakeup_event)
576 (pdata->clear_wakeup_event)();
579 static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id)
581 struct pxa27x_keypad *keypad = dev_id;
582 unsigned long kpc = keypad_readl(KPC);
584 clear_wakeup_event(keypad);
587 pxa27x_keypad_scan_direct(keypad);
590 pxa27x_keypad_scan_matrix(keypad);
595 static void pxa27x_keypad_config(struct pxa27x_keypad *keypad)
597 struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
598 unsigned int mask = 0, direct_key_num = 0;
599 unsigned long kpc = 0;
601 /* clear pending interrupt bit */
604 /* enable matrix keys with automatic scan */
605 if (pdata->matrix_key_rows && pdata->matrix_key_cols) {
606 kpc |= KPC_ASACT | KPC_MIE | KPC_ME | KPC_MS_ALL;
607 kpc |= KPC_MKRN(pdata->matrix_key_rows) |
608 KPC_MKCN(pdata->matrix_key_cols);
611 /* enable rotary key, debounce interval same as direct keys */
612 if (pdata->enable_rotary0) {
618 if (pdata->enable_rotary1) {
624 if (pdata->direct_key_num > direct_key_num)
625 direct_key_num = pdata->direct_key_num;
628 * Direct keys usage may not start from KP_DKIN0, check the platfrom
629 * mask data to config the specific.
631 if (pdata->direct_key_mask)
632 keypad->direct_key_mask = pdata->direct_key_mask;
634 keypad->direct_key_mask = ((1 << direct_key_num) - 1) & ~mask;
636 /* enable direct key */
638 kpc |= KPC_DE | KPC_DIE | KPC_DKN(direct_key_num);
640 keypad_writel(KPC, kpc | KPC_RE_ZERO_DEB);
641 keypad_writel(KPREC, DEFAULT_KPREC);
642 keypad_writel(KPKDI, pdata->debounce_interval);
645 static int pxa27x_keypad_open(struct input_dev *dev)
647 struct pxa27x_keypad *keypad = input_get_drvdata(dev);
649 /* Enable unit clock */
650 clk_prepare_enable(keypad->clk);
651 pxa27x_keypad_config(keypad);
656 static void pxa27x_keypad_close(struct input_dev *dev)
658 struct pxa27x_keypad *keypad = input_get_drvdata(dev);
660 /* Disable clock unit */
661 clk_disable_unprepare(keypad->clk);
664 #ifdef CONFIG_PM_SLEEP
665 static int pxa27x_keypad_suspend(struct device *dev)
667 struct platform_device *pdev = to_platform_device(dev);
668 struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
671 * If the keypad is used a wake up source, clock can not be disabled.
672 * Or it can not detect the key pressing.
674 if (device_may_wakeup(&pdev->dev))
675 enable_irq_wake(keypad->irq);
677 clk_disable_unprepare(keypad->clk);
682 static int pxa27x_keypad_resume(struct device *dev)
684 struct platform_device *pdev = to_platform_device(dev);
685 struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
686 struct input_dev *input_dev = keypad->input_dev;
689 * If the keypad is used as wake up source, the clock is not turned
690 * off. So do not need configure it again.
692 if (device_may_wakeup(&pdev->dev)) {
693 disable_irq_wake(keypad->irq);
695 mutex_lock(&input_dev->mutex);
697 if (input_dev->users) {
698 /* Enable unit clock */
699 clk_prepare_enable(keypad->clk);
700 pxa27x_keypad_config(keypad);
703 mutex_unlock(&input_dev->mutex);
710 static SIMPLE_DEV_PM_OPS(pxa27x_keypad_pm_ops,
711 pxa27x_keypad_suspend, pxa27x_keypad_resume);
714 static int pxa27x_keypad_probe(struct platform_device *pdev)
716 struct pxa27x_keypad_platform_data *pdata = pdev->dev.platform_data;
717 struct device_node *np = pdev->dev.of_node;
718 struct pxa27x_keypad *keypad;
719 struct input_dev *input_dev;
720 struct resource *res;
723 /* Driver need build keycode from device tree or pdata */
727 irq = platform_get_irq(pdev, 0);
729 dev_err(&pdev->dev, "failed to get keypad irq\n");
733 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
735 dev_err(&pdev->dev, "failed to get I/O memory\n");
739 keypad = kzalloc(sizeof(struct pxa27x_keypad), GFP_KERNEL);
740 input_dev = input_allocate_device();
741 if (!keypad || !input_dev) {
742 dev_err(&pdev->dev, "failed to allocate memory\n");
747 keypad->pdata = pdata;
748 keypad->input_dev = input_dev;
751 res = request_mem_region(res->start, resource_size(res), pdev->name);
753 dev_err(&pdev->dev, "failed to request I/O memory\n");
758 keypad->mmio_base = ioremap(res->start, resource_size(res));
759 if (keypad->mmio_base == NULL) {
760 dev_err(&pdev->dev, "failed to remap I/O memory\n");
762 goto failed_free_mem;
765 keypad->clk = clk_get(&pdev->dev, NULL);
766 if (IS_ERR(keypad->clk)) {
767 dev_err(&pdev->dev, "failed to get keypad clock\n");
768 error = PTR_ERR(keypad->clk);
772 input_dev->name = pdev->name;
773 input_dev->id.bustype = BUS_HOST;
774 input_dev->open = pxa27x_keypad_open;
775 input_dev->close = pxa27x_keypad_close;
776 input_dev->dev.parent = &pdev->dev;
778 input_dev->keycode = keypad->keycodes;
779 input_dev->keycodesize = sizeof(keypad->keycodes[0]);
780 input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes);
782 input_set_drvdata(input_dev, keypad);
784 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
785 input_set_capability(input_dev, EV_MSC, MSC_SCAN);
788 error = pxa27x_keypad_build_keycode(keypad);
790 error = pxa27x_keypad_build_keycode_from_dt(keypad);
792 dev_err(&pdev->dev, "failed to build keycode\n");
796 /* If device tree is supported, pdata will be allocated. */
797 pdata = keypad->pdata;
799 if ((pdata->enable_rotary0 && keypad->rotary_rel_code[0] != -1) ||
800 (pdata->enable_rotary1 && keypad->rotary_rel_code[1] != -1)) {
801 input_dev->evbit[0] |= BIT_MASK(EV_REL);
804 error = request_irq(irq, pxa27x_keypad_irq_handler, 0,
807 dev_err(&pdev->dev, "failed to request IRQ\n");
811 /* Register the input device */
812 error = input_register_device(input_dev);
814 dev_err(&pdev->dev, "failed to register input device\n");
815 goto failed_free_irq;
818 platform_set_drvdata(pdev, keypad);
819 device_init_wakeup(&pdev->dev, 1);
824 free_irq(irq, keypad);
826 clk_put(keypad->clk);
828 iounmap(keypad->mmio_base);
830 release_mem_region(res->start, resource_size(res));
832 input_free_device(input_dev);
837 static int pxa27x_keypad_remove(struct platform_device *pdev)
839 struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
840 struct resource *res;
842 free_irq(keypad->irq, keypad);
843 clk_put(keypad->clk);
845 input_unregister_device(keypad->input_dev);
846 iounmap(keypad->mmio_base);
848 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
849 release_mem_region(res->start, resource_size(res));
856 /* work with hotplug and coldplug */
857 MODULE_ALIAS("platform:pxa27x-keypad");
860 static const struct of_device_id pxa27x_keypad_dt_match[] = {
861 { .compatible = "marvell,pxa27x-keypad" },
864 MODULE_DEVICE_TABLE(of, pxa27x_keypad_dt_match);
867 static struct platform_driver pxa27x_keypad_driver = {
868 .probe = pxa27x_keypad_probe,
869 .remove = pxa27x_keypad_remove,
871 .name = "pxa27x-keypad",
872 .of_match_table = of_match_ptr(pxa27x_keypad_dt_match),
873 .owner = THIS_MODULE,
874 .pm = &pxa27x_keypad_pm_ops,
877 module_platform_driver(pxa27x_keypad_driver);
879 MODULE_DESCRIPTION("PXA27x Keypad Controller Driver");
880 MODULE_LICENSE("GPL");