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>
32 #include <asm/mach/arch.h>
33 #include <asm/mach/map.h>
35 #include <mach/hardware.h>
36 #include <linux/platform_data/keypad-pxa27x.h>
38 * Keypad Controller registers
40 #define KPC 0x0000 /* Keypad Control register */
41 #define KPDK 0x0008 /* Keypad Direct Key register */
42 #define KPREC 0x0010 /* Keypad Rotary Encoder register */
43 #define KPMK 0x0018 /* Keypad Matrix Key register */
44 #define KPAS 0x0020 /* Keypad Automatic Scan register */
46 /* Keypad Automatic Scan Multiple Key Presser register 0-3 */
47 #define KPASMKP0 0x0028
48 #define KPASMKP1 0x0030
49 #define KPASMKP2 0x0038
50 #define KPASMKP3 0x0040
54 #define KPC_MKRN(n) ((((n) - 1) & 0x7) << 26) /* matrix key row number */
55 #define KPC_MKCN(n) ((((n) - 1) & 0x7) << 23) /* matrix key column number */
56 #define KPC_DKN(n) ((((n) - 1) & 0x7) << 6) /* direct key number */
58 #define KPC_AS (0x1 << 30) /* Automatic Scan bit */
59 #define KPC_ASACT (0x1 << 29) /* Automatic Scan on Activity */
60 #define KPC_MI (0x1 << 22) /* Matrix interrupt bit */
61 #define KPC_IMKP (0x1 << 21) /* Ignore Multiple Key Press */
63 #define KPC_MS(n) (0x1 << (13 + (n))) /* Matrix scan line 'n' */
64 #define KPC_MS_ALL (0xff << 13)
66 #define KPC_ME (0x1 << 12) /* Matrix Keypad Enable */
67 #define KPC_MIE (0x1 << 11) /* Matrix Interrupt Enable */
68 #define KPC_DK_DEB_SEL (0x1 << 9) /* Direct Keypad Debounce Select */
69 #define KPC_DI (0x1 << 5) /* Direct key interrupt bit */
70 #define KPC_RE_ZERO_DEB (0x1 << 4) /* Rotary Encoder Zero Debounce */
71 #define KPC_REE1 (0x1 << 3) /* Rotary Encoder1 Enable */
72 #define KPC_REE0 (0x1 << 2) /* Rotary Encoder0 Enable */
73 #define KPC_DE (0x1 << 1) /* Direct Keypad Enable */
74 #define KPC_DIE (0x1 << 0) /* Direct Keypad interrupt Enable */
76 #define KPDK_DKP (0x1 << 31)
77 #define KPDK_DK(n) ((n) & 0xff)
79 #define KPREC_OF1 (0x1 << 31)
80 #define kPREC_UF1 (0x1 << 30)
81 #define KPREC_OF0 (0x1 << 15)
82 #define KPREC_UF0 (0x1 << 14)
84 #define KPREC_RECOUNT0(n) ((n) & 0xff)
85 #define KPREC_RECOUNT1(n) (((n) >> 16) & 0xff)
87 #define KPMK_MKP (0x1 << 31)
88 #define KPAS_SO (0x1 << 31)
89 #define KPASMKPx_SO (0x1 << 31)
91 #define KPAS_MUKP(n) (((n) >> 26) & 0x1f)
92 #define KPAS_RP(n) (((n) >> 4) & 0xf)
93 #define KPAS_CP(n) ((n) & 0xf)
95 #define KPASMKP_MKC_MASK (0xff)
97 #define keypad_readl(off) __raw_readl(keypad->mmio_base + (off))
98 #define keypad_writel(off, v) __raw_writel((v), keypad->mmio_base + (off))
100 #define MAX_MATRIX_KEY_NUM (MAX_MATRIX_KEY_ROWS * MAX_MATRIX_KEY_COLS)
101 #define MAX_KEYPAD_KEYS (MAX_MATRIX_KEY_NUM + MAX_DIRECT_KEY_NUM)
103 struct pxa27x_keypad {
104 const struct pxa27x_keypad_platform_data *pdata;
107 struct input_dev *input_dev;
108 void __iomem *mmio_base;
112 unsigned short keycodes[MAX_KEYPAD_KEYS];
113 int rotary_rel_code[2];
115 /* state row bits of each column scan */
116 uint32_t matrix_key_state[MAX_MATRIX_KEY_COLS];
117 uint32_t direct_key_state;
119 unsigned int direct_key_mask;
123 static int pxa27x_keypad_matrix_key_parse_dt(struct pxa27x_keypad *keypad,
124 struct pxa27x_keypad_platform_data *pdata)
126 struct input_dev *input_dev = keypad->input_dev;
127 struct device *dev = input_dev->dev.parent;
131 error = matrix_keypad_parse_of_params(dev, &rows, &cols);
135 if (rows > MAX_MATRIX_KEY_ROWS || cols > MAX_MATRIX_KEY_COLS) {
136 dev_err(dev, "rows or cols exceeds maximum value\n");
140 pdata->matrix_key_rows = rows;
141 pdata->matrix_key_cols = cols;
143 error = matrix_keypad_build_keymap(NULL, NULL,
144 pdata->matrix_key_rows,
145 pdata->matrix_key_cols,
146 keypad->keycodes, input_dev);
153 static int pxa27x_keypad_direct_key_parse_dt(struct pxa27x_keypad *keypad,
154 struct pxa27x_keypad_platform_data *pdata)
156 struct input_dev *input_dev = keypad->input_dev;
157 struct device *dev = input_dev->dev.parent;
158 struct device_node *np = dev->of_node;
161 unsigned int proplen, size;
165 error = of_property_read_u32(np, "marvell,direct-key-count",
166 &pdata->direct_key_num);
169 * If do not have marvel,direct-key-count defined,
170 * it means direct key is not supported.
172 return error == -EINVAL ? 0 : error;
175 error = of_property_read_u32(np, "marvell,direct-key-mask",
176 &pdata->direct_key_mask);
178 if (error != -EINVAL)
182 * If marvell,direct-key-mask is not defined, driver will use
183 * default value. Default value is set when configure the keypad.
185 pdata->direct_key_mask = 0;
188 pdata->direct_key_low_active = of_property_read_bool(np,
189 "marvell,direct-key-low-active");
191 prop = of_get_property(np, "marvell,direct-key-map", &proplen);
195 if (proplen % sizeof(u16))
198 size = proplen / sizeof(u16);
200 /* Only MAX_DIRECT_KEY_NUM is accepted.*/
201 if (size > MAX_DIRECT_KEY_NUM)
204 for (i = 0; i < size; i++) {
205 code = be16_to_cpup(prop + i);
206 keypad->keycodes[MAX_MATRIX_KEY_NUM + i] = code;
207 __set_bit(code, input_dev->keybit);
213 static int pxa27x_keypad_rotary_parse_dt(struct pxa27x_keypad *keypad,
214 struct pxa27x_keypad_platform_data *pdata)
218 unsigned int code, proplen;
219 const char *rotaryname[2] = {
220 "marvell,rotary0", "marvell,rotary1"};
221 const char relkeyname[] = {"marvell,rotary-rel-key"};
222 struct input_dev *input_dev = keypad->input_dev;
223 struct device *dev = input_dev->dev.parent;
224 struct device_node *np = dev->of_node;
226 relkey_ret = of_property_read_u32(np, relkeyname, &code);
227 /* if can read correct rotary key-code, we do not need this. */
228 if (relkey_ret == 0) {
229 unsigned short relcode;
231 /* rotary0 taks lower half, rotary1 taks upper half. */
232 relcode = code & 0xffff;
233 pdata->rotary0_rel_code = (code & 0xffff);
234 __set_bit(relcode, input_dev->relbit);
236 relcode = code >> 16;
237 pdata->rotary1_rel_code = relcode;
238 __set_bit(relcode, input_dev->relbit);
241 for (i = 0; i < 2; i++) {
242 prop = of_get_property(np, rotaryname[i], &proplen);
244 * If the prop is not set, it means keypad does not need
245 * initialize the rotaryX.
250 code = be32_to_cpup(prop);
252 * Not all up/down key code are valid.
253 * Now we depends on direct-rel-code.
255 if ((!(code & 0xffff) || !(code >> 16)) && relkey_ret) {
258 unsigned int n = MAX_MATRIX_KEY_NUM + (i << 1);
259 unsigned short keycode;
261 keycode = code & 0xffff;
262 keypad->keycodes[n] = keycode;
263 __set_bit(keycode, input_dev->keybit);
265 keycode = code >> 16;
266 keypad->keycodes[n + 1] = keycode;
267 __set_bit(keycode, input_dev->keybit);
270 pdata->rotary0_rel_code = -1;
272 pdata->rotary1_rel_code = -1;
275 pdata->enable_rotary0 = 1;
277 pdata->enable_rotary1 = 1;
280 keypad->rotary_rel_code[0] = pdata->rotary0_rel_code;
281 keypad->rotary_rel_code[1] = pdata->rotary1_rel_code;
286 static int pxa27x_keypad_build_keycode_from_dt(struct pxa27x_keypad *keypad)
288 struct input_dev *input_dev = keypad->input_dev;
289 struct device *dev = input_dev->dev.parent;
290 struct device_node *np = dev->of_node;
291 struct pxa27x_keypad_platform_data *pdata;
294 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
296 dev_err(dev, "failed to allocate memory for pdata\n");
300 error = pxa27x_keypad_matrix_key_parse_dt(keypad, pdata);
302 dev_err(dev, "failed to parse matrix key\n");
306 error = pxa27x_keypad_direct_key_parse_dt(keypad, pdata);
308 dev_err(dev, "failed to parse direct key\n");
312 error = pxa27x_keypad_rotary_parse_dt(keypad, pdata);
314 dev_err(dev, "failed to parse rotary key\n");
318 error = of_property_read_u32(np, "marvell,debounce-interval",
319 &pdata->debounce_interval);
321 dev_err(dev, "failed to parse debpunce-interval\n");
326 * The keycodes may not only includes matrix key but also the direct
329 input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes);
331 keypad->pdata = pdata;
337 static int pxa27x_keypad_build_keycode_from_dt(struct pxa27x_keypad *keypad)
339 dev_info(keypad->input_dev->dev.parent, "missing platform data\n");
346 static int pxa27x_keypad_build_keycode(struct pxa27x_keypad *keypad)
348 const struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
349 struct input_dev *input_dev = keypad->input_dev;
350 const struct matrix_keymap_data *keymap_data =
351 pdata ? pdata->matrix_keymap_data : NULL;
352 unsigned short keycode;
356 error = matrix_keypad_build_keymap(keymap_data, NULL,
357 pdata->matrix_key_rows,
358 pdata->matrix_key_cols,
359 keypad->keycodes, input_dev);
364 * The keycodes may not only include matrix keys but also the direct
367 input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes);
369 /* For direct keys. */
370 for (i = 0; i < pdata->direct_key_num; i++) {
371 keycode = pdata->direct_key_map[i];
372 keypad->keycodes[MAX_MATRIX_KEY_NUM + i] = keycode;
373 __set_bit(keycode, input_dev->keybit);
376 if (pdata->enable_rotary0) {
377 if (pdata->rotary0_up_key && pdata->rotary0_down_key) {
378 keycode = pdata->rotary0_up_key;
379 keypad->keycodes[MAX_MATRIX_KEY_NUM + 0] = keycode;
380 __set_bit(keycode, input_dev->keybit);
382 keycode = pdata->rotary0_down_key;
383 keypad->keycodes[MAX_MATRIX_KEY_NUM + 1] = keycode;
384 __set_bit(keycode, input_dev->keybit);
386 keypad->rotary_rel_code[0] = -1;
388 keypad->rotary_rel_code[0] = pdata->rotary0_rel_code;
389 __set_bit(pdata->rotary0_rel_code, input_dev->relbit);
393 if (pdata->enable_rotary1) {
394 if (pdata->rotary1_up_key && pdata->rotary1_down_key) {
395 keycode = pdata->rotary1_up_key;
396 keypad->keycodes[MAX_MATRIX_KEY_NUM + 2] = keycode;
397 __set_bit(keycode, input_dev->keybit);
399 keycode = pdata->rotary1_down_key;
400 keypad->keycodes[MAX_MATRIX_KEY_NUM + 3] = keycode;
401 __set_bit(keycode, input_dev->keybit);
403 keypad->rotary_rel_code[1] = -1;
405 keypad->rotary_rel_code[1] = pdata->rotary1_rel_code;
406 __set_bit(pdata->rotary1_rel_code, input_dev->relbit);
410 __clear_bit(KEY_RESERVED, input_dev->keybit);
415 static void pxa27x_keypad_scan_matrix(struct pxa27x_keypad *keypad)
417 const struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
418 struct input_dev *input_dev = keypad->input_dev;
419 int row, col, num_keys_pressed = 0;
420 uint32_t new_state[MAX_MATRIX_KEY_COLS];
421 uint32_t kpas = keypad_readl(KPAS);
423 num_keys_pressed = KPAS_MUKP(kpas);
425 memset(new_state, 0, sizeof(new_state));
427 if (num_keys_pressed == 0)
430 if (num_keys_pressed == 1) {
434 /* if invalid row/col, treat as no key pressed */
435 if (col >= pdata->matrix_key_cols ||
436 row >= pdata->matrix_key_rows)
439 new_state[col] = (1 << row);
443 if (num_keys_pressed > 1) {
444 uint32_t kpasmkp0 = keypad_readl(KPASMKP0);
445 uint32_t kpasmkp1 = keypad_readl(KPASMKP1);
446 uint32_t kpasmkp2 = keypad_readl(KPASMKP2);
447 uint32_t kpasmkp3 = keypad_readl(KPASMKP3);
449 new_state[0] = kpasmkp0 & KPASMKP_MKC_MASK;
450 new_state[1] = (kpasmkp0 >> 16) & KPASMKP_MKC_MASK;
451 new_state[2] = kpasmkp1 & KPASMKP_MKC_MASK;
452 new_state[3] = (kpasmkp1 >> 16) & KPASMKP_MKC_MASK;
453 new_state[4] = kpasmkp2 & KPASMKP_MKC_MASK;
454 new_state[5] = (kpasmkp2 >> 16) & KPASMKP_MKC_MASK;
455 new_state[6] = kpasmkp3 & KPASMKP_MKC_MASK;
456 new_state[7] = (kpasmkp3 >> 16) & KPASMKP_MKC_MASK;
459 for (col = 0; col < pdata->matrix_key_cols; col++) {
460 uint32_t bits_changed;
463 bits_changed = keypad->matrix_key_state[col] ^ new_state[col];
464 if (bits_changed == 0)
467 for (row = 0; row < pdata->matrix_key_rows; row++) {
468 if ((bits_changed & (1 << row)) == 0)
471 code = MATRIX_SCAN_CODE(row, col, MATRIX_ROW_SHIFT);
472 input_event(input_dev, EV_MSC, MSC_SCAN, code);
473 input_report_key(input_dev, keypad->keycodes[code],
474 new_state[col] & (1 << row));
477 input_sync(input_dev);
478 memcpy(keypad->matrix_key_state, new_state, sizeof(new_state));
481 #define DEFAULT_KPREC (0x007f007f)
483 static inline int rotary_delta(uint32_t kprec)
485 if (kprec & KPREC_OF0)
486 return (kprec & 0xff) + 0x7f;
487 else if (kprec & KPREC_UF0)
488 return (kprec & 0xff) - 0x7f - 0xff;
490 return (kprec & 0xff) - 0x7f;
493 static void report_rotary_event(struct pxa27x_keypad *keypad, int r, int delta)
495 struct input_dev *dev = keypad->input_dev;
500 if (keypad->rotary_rel_code[r] == -1) {
501 int code = MAX_MATRIX_KEY_NUM + 2 * r + (delta > 0 ? 0 : 1);
502 unsigned char keycode = keypad->keycodes[code];
504 /* simulate a press-n-release */
505 input_event(dev, EV_MSC, MSC_SCAN, code);
506 input_report_key(dev, keycode, 1);
508 input_event(dev, EV_MSC, MSC_SCAN, code);
509 input_report_key(dev, keycode, 0);
512 input_report_rel(dev, keypad->rotary_rel_code[r], delta);
517 static void pxa27x_keypad_scan_rotary(struct pxa27x_keypad *keypad)
519 const struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
522 /* read and reset to default count value */
523 kprec = keypad_readl(KPREC);
524 keypad_writel(KPREC, DEFAULT_KPREC);
526 if (pdata->enable_rotary0)
527 report_rotary_event(keypad, 0, rotary_delta(kprec));
529 if (pdata->enable_rotary1)
530 report_rotary_event(keypad, 1, rotary_delta(kprec >> 16));
533 static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad)
535 const struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
536 struct input_dev *input_dev = keypad->input_dev;
537 unsigned int new_state;
538 uint32_t kpdk, bits_changed;
541 kpdk = keypad_readl(KPDK);
543 if (pdata->enable_rotary0 || pdata->enable_rotary1)
544 pxa27x_keypad_scan_rotary(keypad);
547 * The KPDR_DK only output the key pin level, so it relates to board,
548 * and low level may be active.
550 if (pdata->direct_key_low_active)
551 new_state = ~KPDK_DK(kpdk) & keypad->direct_key_mask;
553 new_state = KPDK_DK(kpdk) & keypad->direct_key_mask;
555 bits_changed = keypad->direct_key_state ^ new_state;
557 if (bits_changed == 0)
560 for (i = 0; i < pdata->direct_key_num; i++) {
561 if (bits_changed & (1 << i)) {
562 int code = MAX_MATRIX_KEY_NUM + i;
564 input_event(input_dev, EV_MSC, MSC_SCAN, code);
565 input_report_key(input_dev, keypad->keycodes[code],
566 new_state & (1 << i));
569 input_sync(input_dev);
570 keypad->direct_key_state = new_state;
573 static void clear_wakeup_event(struct pxa27x_keypad *keypad)
575 const struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
577 if (pdata->clear_wakeup_event)
578 (pdata->clear_wakeup_event)();
581 static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id)
583 struct pxa27x_keypad *keypad = dev_id;
584 unsigned long kpc = keypad_readl(KPC);
586 clear_wakeup_event(keypad);
589 pxa27x_keypad_scan_direct(keypad);
592 pxa27x_keypad_scan_matrix(keypad);
597 static void pxa27x_keypad_config(struct pxa27x_keypad *keypad)
599 const struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
600 unsigned int mask = 0, direct_key_num = 0;
601 unsigned long kpc = 0;
603 /* clear pending interrupt bit */
606 /* enable matrix keys with automatic scan */
607 if (pdata->matrix_key_rows && pdata->matrix_key_cols) {
608 kpc |= KPC_ASACT | KPC_MIE | KPC_ME | KPC_MS_ALL;
609 kpc |= KPC_MKRN(pdata->matrix_key_rows) |
610 KPC_MKCN(pdata->matrix_key_cols);
613 /* enable rotary key, debounce interval same as direct keys */
614 if (pdata->enable_rotary0) {
620 if (pdata->enable_rotary1) {
626 if (pdata->direct_key_num > direct_key_num)
627 direct_key_num = pdata->direct_key_num;
630 * Direct keys usage may not start from KP_DKIN0, check the platfrom
631 * mask data to config the specific.
633 if (pdata->direct_key_mask)
634 keypad->direct_key_mask = pdata->direct_key_mask;
636 keypad->direct_key_mask = ((1 << direct_key_num) - 1) & ~mask;
638 /* enable direct key */
640 kpc |= KPC_DE | KPC_DIE | KPC_DKN(direct_key_num);
642 keypad_writel(KPC, kpc | KPC_RE_ZERO_DEB);
643 keypad_writel(KPREC, DEFAULT_KPREC);
644 keypad_writel(KPKDI, pdata->debounce_interval);
647 static int pxa27x_keypad_open(struct input_dev *dev)
649 struct pxa27x_keypad *keypad = input_get_drvdata(dev);
651 /* Enable unit clock */
652 clk_prepare_enable(keypad->clk);
653 pxa27x_keypad_config(keypad);
658 static void pxa27x_keypad_close(struct input_dev *dev)
660 struct pxa27x_keypad *keypad = input_get_drvdata(dev);
662 /* Disable clock unit */
663 clk_disable_unprepare(keypad->clk);
666 #ifdef CONFIG_PM_SLEEP
667 static int pxa27x_keypad_suspend(struct device *dev)
669 struct platform_device *pdev = to_platform_device(dev);
670 struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
673 * If the keypad is used a wake up source, clock can not be disabled.
674 * Or it can not detect the key pressing.
676 if (device_may_wakeup(&pdev->dev))
677 enable_irq_wake(keypad->irq);
679 clk_disable_unprepare(keypad->clk);
684 static int pxa27x_keypad_resume(struct device *dev)
686 struct platform_device *pdev = to_platform_device(dev);
687 struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
688 struct input_dev *input_dev = keypad->input_dev;
691 * If the keypad is used as wake up source, the clock is not turned
692 * off. So do not need configure it again.
694 if (device_may_wakeup(&pdev->dev)) {
695 disable_irq_wake(keypad->irq);
697 mutex_lock(&input_dev->mutex);
699 if (input_dev->users) {
700 /* Enable unit clock */
701 clk_prepare_enable(keypad->clk);
702 pxa27x_keypad_config(keypad);
705 mutex_unlock(&input_dev->mutex);
712 static SIMPLE_DEV_PM_OPS(pxa27x_keypad_pm_ops,
713 pxa27x_keypad_suspend, pxa27x_keypad_resume);
716 static int pxa27x_keypad_probe(struct platform_device *pdev)
718 const struct pxa27x_keypad_platform_data *pdata =
719 dev_get_platdata(&pdev->dev);
720 struct device_node *np = pdev->dev.of_node;
721 struct pxa27x_keypad *keypad;
722 struct input_dev *input_dev;
723 struct resource *res;
726 /* Driver need build keycode from device tree or pdata */
730 irq = platform_get_irq(pdev, 0);
732 dev_err(&pdev->dev, "failed to get keypad irq\n");
736 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
738 dev_err(&pdev->dev, "failed to get I/O memory\n");
742 keypad = kzalloc(sizeof(struct pxa27x_keypad), GFP_KERNEL);
743 input_dev = input_allocate_device();
744 if (!keypad || !input_dev) {
745 dev_err(&pdev->dev, "failed to allocate memory\n");
750 keypad->pdata = pdata;
751 keypad->input_dev = input_dev;
754 res = request_mem_region(res->start, resource_size(res), pdev->name);
756 dev_err(&pdev->dev, "failed to request I/O memory\n");
761 keypad->mmio_base = ioremap(res->start, resource_size(res));
762 if (keypad->mmio_base == NULL) {
763 dev_err(&pdev->dev, "failed to remap I/O memory\n");
765 goto failed_free_mem;
768 keypad->clk = clk_get(&pdev->dev, NULL);
769 if (IS_ERR(keypad->clk)) {
770 dev_err(&pdev->dev, "failed to get keypad clock\n");
771 error = PTR_ERR(keypad->clk);
775 input_dev->name = pdev->name;
776 input_dev->id.bustype = BUS_HOST;
777 input_dev->open = pxa27x_keypad_open;
778 input_dev->close = pxa27x_keypad_close;
779 input_dev->dev.parent = &pdev->dev;
781 input_dev->keycode = keypad->keycodes;
782 input_dev->keycodesize = sizeof(keypad->keycodes[0]);
783 input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes);
785 input_set_drvdata(input_dev, keypad);
787 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
788 input_set_capability(input_dev, EV_MSC, MSC_SCAN);
791 error = pxa27x_keypad_build_keycode(keypad);
793 error = pxa27x_keypad_build_keycode_from_dt(keypad);
795 * Data that we get from DT resides in dynamically
796 * allocated memory so we need to update our pdata
799 pdata = keypad->pdata;
802 dev_err(&pdev->dev, "failed to build keycode\n");
806 if ((pdata->enable_rotary0 && keypad->rotary_rel_code[0] != -1) ||
807 (pdata->enable_rotary1 && keypad->rotary_rel_code[1] != -1)) {
808 input_dev->evbit[0] |= BIT_MASK(EV_REL);
811 error = request_irq(irq, pxa27x_keypad_irq_handler, 0,
814 dev_err(&pdev->dev, "failed to request IRQ\n");
818 /* Register the input device */
819 error = input_register_device(input_dev);
821 dev_err(&pdev->dev, "failed to register input device\n");
822 goto failed_free_irq;
825 platform_set_drvdata(pdev, keypad);
826 device_init_wakeup(&pdev->dev, 1);
831 free_irq(irq, keypad);
833 clk_put(keypad->clk);
835 iounmap(keypad->mmio_base);
837 release_mem_region(res->start, resource_size(res));
839 input_free_device(input_dev);
844 static int pxa27x_keypad_remove(struct platform_device *pdev)
846 struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
847 struct resource *res;
849 free_irq(keypad->irq, keypad);
850 clk_put(keypad->clk);
852 input_unregister_device(keypad->input_dev);
853 iounmap(keypad->mmio_base);
855 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
856 release_mem_region(res->start, resource_size(res));
863 /* work with hotplug and coldplug */
864 MODULE_ALIAS("platform:pxa27x-keypad");
867 static const struct of_device_id pxa27x_keypad_dt_match[] = {
868 { .compatible = "marvell,pxa27x-keypad" },
871 MODULE_DEVICE_TABLE(of, pxa27x_keypad_dt_match);
874 static struct platform_driver pxa27x_keypad_driver = {
875 .probe = pxa27x_keypad_probe,
876 .remove = pxa27x_keypad_remove,
878 .name = "pxa27x-keypad",
879 .of_match_table = of_match_ptr(pxa27x_keypad_dt_match),
880 .owner = THIS_MODULE,
881 .pm = &pxa27x_keypad_pm_ops,
884 module_platform_driver(pxa27x_keypad_driver);
886 MODULE_DESCRIPTION("PXA27x Keypad Controller Driver");
887 MODULE_LICENSE("GPL");