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1 | /* |
2 | * Samsung keypad driver |
3 | * |
4 | * Copyright (C) 2010 Samsung Electronics Co.Ltd |
5 | * Author: Joonyoung Shim <jy0922.shim@samsung.com> |
6 | * Author: Donghwa Lee <dh09.lee@samsung.com> |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify it |
9 | * under the terms of the GNU General Public License as published by the |
10 | * Free Software Foundation; either version 2 of the License, or (at your |
11 | * option) any later version. |
12 | */ |
13 | |
14 | #include <linux/clk.h> |
15 | #include <linux/delay.h> |
16 | #include <linux/err.h> |
17 | #include <linux/init.h> |
18 | #include <linux/input.h> |
19 | #include <linux/interrupt.h> |
20 | #include <linux/io.h> |
21 | #include <linux/module.h> |
22 | #include <linux/platform_device.h> |
23 | #include <linux/pm.h> |
24 | #include <linux/pm_runtime.h> |
25 | #include <linux/slab.h> |
26 | #include <linux/of.h> |
27 | #include <linux/of_gpio.h> |
28 | #include <linux/sched.h> |
29 | #include <linux/input/samsung-keypad.h> |
30 | |
31 | #define SAMSUNG_KEYIFCON 0x00 |
32 | #define SAMSUNG_KEYIFSTSCLR 0x04 |
33 | #define SAMSUNG_KEYIFCOL 0x08 |
34 | #define SAMSUNG_KEYIFROW 0x0c |
35 | #define SAMSUNG_KEYIFFC 0x10 |
36 | |
37 | /* SAMSUNG_KEYIFCON */ |
38 | #define SAMSUNG_KEYIFCON_INT_F_EN (1 << 0) |
39 | #define SAMSUNG_KEYIFCON_INT_R_EN (1 << 1) |
40 | #define SAMSUNG_KEYIFCON_DF_EN (1 << 2) |
41 | #define SAMSUNG_KEYIFCON_FC_EN (1 << 3) |
42 | #define SAMSUNG_KEYIFCON_WAKEUPEN (1 << 4) |
43 | |
44 | /* SAMSUNG_KEYIFSTSCLR */ |
45 | #define SAMSUNG_KEYIFSTSCLR_P_INT_MASK (0xff << 0) |
46 | #define SAMSUNG_KEYIFSTSCLR_R_INT_MASK (0xff << 8) |
47 | #define SAMSUNG_KEYIFSTSCLR_R_INT_OFFSET 8 |
48 | #define S5PV210_KEYIFSTSCLR_P_INT_MASK (0x3fff << 0) |
49 | #define S5PV210_KEYIFSTSCLR_R_INT_MASK (0x3fff << 16) |
50 | #define S5PV210_KEYIFSTSCLR_R_INT_OFFSET 16 |
51 | |
52 | /* SAMSUNG_KEYIFCOL */ |
53 | #define SAMSUNG_KEYIFCOL_MASK (0xff << 0) |
54 | #define S5PV210_KEYIFCOLEN_MASK (0xff << 8) |
55 | |
56 | /* SAMSUNG_KEYIFROW */ |
57 | #define SAMSUNG_KEYIFROW_MASK (0xff << 0) |
58 | #define S5PV210_KEYIFROW_MASK (0x3fff << 0) |
59 | |
60 | /* SAMSUNG_KEYIFFC */ |
61 | #define SAMSUNG_KEYIFFC_MASK (0x3ff << 0) |
62 | |
63 | enum samsung_keypad_type { |
64 | KEYPAD_TYPE_SAMSUNG, |
65 | KEYPAD_TYPE_S5PV210, |
66 | }; |
67 | |
68 | struct samsung_keypad { |
69 | struct input_dev *input_dev; |
70 | struct platform_device *pdev; |
71 | struct clk *clk; |
72 | void __iomem *base; |
73 | wait_queue_head_t wait; |
74 | bool stopped; |
75 | bool wake_enabled; |
76 | int irq; |
77 | enum samsung_keypad_type type; |
78 | unsigned int row_shift; |
79 | unsigned int rows; |
80 | unsigned int cols; |
81 | unsigned int row_state[SAMSUNG_MAX_COLS]; |
82 | #ifdef CONFIG_OF |
83 | int row_gpios[SAMSUNG_MAX_ROWS]; |
84 | int col_gpios[SAMSUNG_MAX_COLS]; |
85 | #endif |
86 | unsigned short keycodes[]; |
87 | }; |
88 | |
89 | static void samsung_keypad_scan(struct samsung_keypad *keypad, |
90 | unsigned int *row_state) |
91 | { |
92 | unsigned int col; |
93 | unsigned int val; |
94 | |
95 | for (col = 0; col < keypad->cols; col++) { |
96 | if (keypad->type == KEYPAD_TYPE_S5PV210) { |
97 | val = S5PV210_KEYIFCOLEN_MASK; |
98 | val &= ~(1 << col) << 8; |
99 | } else { |
100 | val = SAMSUNG_KEYIFCOL_MASK; |
101 | val &= ~(1 << col); |
102 | } |
103 | |
104 | writel(val, keypad->base + SAMSUNG_KEYIFCOL); |
105 | mdelay(1); |
106 | |
107 | val = readl(keypad->base + SAMSUNG_KEYIFROW); |
108 | row_state[col] = ~val & ((1 << keypad->rows) - 1); |
109 | } |
110 | |
111 | /* KEYIFCOL reg clear */ |
112 | writel(0, keypad->base + SAMSUNG_KEYIFCOL); |
113 | } |
114 | |
115 | static bool samsung_keypad_report(struct samsung_keypad *keypad, |
116 | unsigned int *row_state) |
117 | { |
118 | struct input_dev *input_dev = keypad->input_dev; |
119 | unsigned int changed; |
120 | unsigned int pressed; |
121 | unsigned int key_down = 0; |
122 | unsigned int val; |
123 | unsigned int col, row; |
124 | |
125 | for (col = 0; col < keypad->cols; col++) { |
126 | changed = row_state[col] ^ keypad->row_state[col]; |
127 | key_down |= row_state[col]; |
128 | if (!changed) |
129 | continue; |
130 | |
131 | for (row = 0; row < keypad->rows; row++) { |
132 | if (!(changed & (1 << row))) |
133 | continue; |
134 | |
135 | pressed = row_state[col] & (1 << row); |
136 | |
137 | dev_dbg(&keypad->input_dev->dev, |
138 | "key %s, row: %d, col: %d\n", |
139 | pressed ? "pressed" : "released", row, col); |
140 | |
141 | val = MATRIX_SCAN_CODE(row, col, keypad->row_shift); |
142 | |
143 | input_event(input_dev, EV_MSC, MSC_SCAN, val); |
144 | input_report_key(input_dev, |
145 | keypad->keycodes[val], pressed); |
146 | } |
147 | input_sync(keypad->input_dev); |
148 | } |
149 | |
150 | memcpy(keypad->row_state, row_state, sizeof(keypad->row_state)); |
151 | |
152 | return key_down; |
153 | } |
154 | |
155 | static irqreturn_t samsung_keypad_irq(int irq, void *dev_id) |
156 | { |
157 | struct samsung_keypad *keypad = dev_id; |
158 | unsigned int row_state[SAMSUNG_MAX_COLS]; |
159 | unsigned int val; |
160 | bool key_down; |
161 | |
162 | pm_runtime_get_sync(&keypad->pdev->dev); |
163 | |
164 | do { |
165 | val = readl(keypad->base + SAMSUNG_KEYIFSTSCLR); |
166 | /* Clear interrupt. */ |
167 | writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR); |
168 | |
169 | samsung_keypad_scan(keypad, row_state); |
170 | |
171 | key_down = samsung_keypad_report(keypad, row_state); |
172 | if (key_down) |
173 | wait_event_timeout(keypad->wait, keypad->stopped, |
174 | msecs_to_jiffies(50)); |
175 | |
176 | } while (key_down && !keypad->stopped); |
177 | |
178 | pm_runtime_put(&keypad->pdev->dev); |
179 | |
180 | return IRQ_HANDLED; |
181 | } |
182 | |
183 | static void samsung_keypad_start(struct samsung_keypad *keypad) |
184 | { |
185 | unsigned int val; |
186 | |
187 | pm_runtime_get_sync(&keypad->pdev->dev); |
188 | |
189 | /* Tell IRQ thread that it may poll the device. */ |
190 | keypad->stopped = false; |
191 | |
192 | clk_enable(keypad->clk); |
193 | |
194 | /* Enable interrupt bits. */ |
195 | val = readl(keypad->base + SAMSUNG_KEYIFCON); |
196 | val |= SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN; |
197 | writel(val, keypad->base + SAMSUNG_KEYIFCON); |
198 | |
199 | /* KEYIFCOL reg clear. */ |
200 | writel(0, keypad->base + SAMSUNG_KEYIFCOL); |
201 | |
202 | pm_runtime_put(&keypad->pdev->dev); |
203 | } |
204 | |
205 | static void samsung_keypad_stop(struct samsung_keypad *keypad) |
206 | { |
207 | unsigned int val; |
208 | |
209 | pm_runtime_get_sync(&keypad->pdev->dev); |
210 | |
211 | /* Signal IRQ thread to stop polling and disable the handler. */ |
212 | keypad->stopped = true; |
213 | wake_up(&keypad->wait); |
214 | disable_irq(keypad->irq); |
215 | |
216 | /* Clear interrupt. */ |
217 | writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR); |
218 | |
219 | /* Disable interrupt bits. */ |
220 | val = readl(keypad->base + SAMSUNG_KEYIFCON); |
221 | val &= ~(SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN); |
222 | writel(val, keypad->base + SAMSUNG_KEYIFCON); |
223 | |
224 | clk_disable(keypad->clk); |
225 | |
226 | /* |
227 | * Now that chip should not generate interrupts we can safely |
228 | * re-enable the handler. |
229 | */ |
230 | enable_irq(keypad->irq); |
231 | |
232 | pm_runtime_put(&keypad->pdev->dev); |
233 | } |
234 | |
235 | static int samsung_keypad_open(struct input_dev *input_dev) |
236 | { |
237 | struct samsung_keypad *keypad = input_get_drvdata(input_dev); |
238 | |
239 | samsung_keypad_start(keypad); |
240 | |
241 | return 0; |
242 | } |
243 | |
244 | static void samsung_keypad_close(struct input_dev *input_dev) |
245 | { |
246 | struct samsung_keypad *keypad = input_get_drvdata(input_dev); |
247 | |
248 | samsung_keypad_stop(keypad); |
249 | } |
250 | |
251 | #ifdef CONFIG_OF |
252 | static struct samsung_keypad_platdata *samsung_keypad_parse_dt( |
253 | struct device *dev) |
254 | { |
255 | struct samsung_keypad_platdata *pdata; |
256 | struct matrix_keymap_data *keymap_data; |
257 | uint32_t *keymap, num_rows = 0, num_cols = 0; |
258 | struct device_node *np = dev->of_node, *key_np; |
259 | unsigned int key_count; |
260 | |
261 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); |
262 | if (!pdata) { |
263 | dev_err(dev, "could not allocate memory for platform data\n"); |
264 | return NULL; |
265 | } |
266 | |
267 | of_property_read_u32(np, "samsung,keypad-num-rows", &num_rows); |
268 | of_property_read_u32(np, "samsung,keypad-num-columns", &num_cols); |
269 | if (!num_rows || !num_cols) { |
270 | dev_err(dev, "number of keypad rows/columns not specified\n"); |
271 | return NULL; |
272 | } |
273 | pdata->rows = num_rows; |
274 | pdata->cols = num_cols; |
275 | |
276 | keymap_data = devm_kzalloc(dev, sizeof(*keymap_data), GFP_KERNEL); |
277 | if (!keymap_data) { |
278 | dev_err(dev, "could not allocate memory for keymap data\n"); |
279 | return NULL; |
280 | } |
281 | pdata->keymap_data = keymap_data; |
282 | |
283 | key_count = of_get_child_count(np); |
284 | keymap_data->keymap_size = key_count; |
285 | keymap = devm_kzalloc(dev, sizeof(uint32_t) * key_count, GFP_KERNEL); |
286 | if (!keymap) { |
287 | dev_err(dev, "could not allocate memory for keymap\n"); |
288 | return NULL; |
289 | } |
290 | keymap_data->keymap = keymap; |
291 | |
292 | for_each_child_of_node(np, key_np) { |
293 | u32 row, col, key_code; |
294 | of_property_read_u32(key_np, "keypad,row", &row); |
295 | of_property_read_u32(key_np, "keypad,column", &col); |
296 | of_property_read_u32(key_np, "linux,code", &key_code); |
297 | *keymap++ = KEY(row, col, key_code); |
298 | } |
299 | |
300 | if (of_get_property(np, "linux,input-no-autorepeat", NULL)) |
301 | pdata->no_autorepeat = true; |
302 | if (of_get_property(np, "linux,input-wakeup", NULL)) |
303 | pdata->wakeup = true; |
304 | |
305 | return pdata; |
306 | } |
307 | |
308 | static void samsung_keypad_parse_dt_gpio(struct device *dev, |
309 | struct samsung_keypad *keypad) |
310 | { |
311 | struct device_node *np = dev->of_node; |
312 | int gpio, error, row, col; |
313 | |
314 | for (row = 0; row < keypad->rows; row++) { |
315 | gpio = of_get_named_gpio(np, "row-gpios", row); |
316 | keypad->row_gpios[row] = gpio; |
317 | if (!gpio_is_valid(gpio)) { |
318 | dev_err(dev, "keypad row[%d]: invalid gpio %d\n", |
319 | row, gpio); |
320 | continue; |
321 | } |
322 | |
323 | error = devm_gpio_request(dev, gpio, "keypad-row"); |
324 | if (error) |
325 | dev_err(dev, |
326 | "keypad row[%d] gpio request failed: %d\n", |
327 | row, error); |
328 | } |
329 | |
330 | for (col = 0; col < keypad->cols; col++) { |
331 | gpio = of_get_named_gpio(np, "col-gpios", col); |
332 | keypad->col_gpios[col] = gpio; |
333 | if (!gpio_is_valid(gpio)) { |
334 | dev_err(dev, "keypad column[%d]: invalid gpio %d\n", |
335 | col, gpio); |
336 | continue; |
337 | } |
338 | |
339 | error = devm_gpio_request(dev, gpio, "keypad-col"); |
340 | if (error) |
341 | dev_err(dev, |
342 | "keypad column[%d] gpio request failed: %d\n", |
343 | col, error); |
344 | } |
345 | } |
346 | #else |
347 | static |
348 | struct samsung_keypad_platdata *samsung_keypad_parse_dt(struct device *dev) |
349 | { |
350 | return NULL; |
351 | } |
352 | #endif |
353 | |
354 | static int samsung_keypad_probe(struct platform_device *pdev) |
355 | { |
356 | const struct samsung_keypad_platdata *pdata; |
357 | const struct matrix_keymap_data *keymap_data; |
358 | struct samsung_keypad *keypad; |
359 | struct resource *res; |
360 | struct input_dev *input_dev; |
361 | unsigned int row_shift; |
362 | unsigned int keymap_size; |
363 | int error; |
364 | |
365 | if (pdev->dev.of_node) |
366 | pdata = samsung_keypad_parse_dt(&pdev->dev); |
367 | else |
368 | pdata = pdev->dev.platform_data; |
369 | if (!pdata) { |
370 | dev_err(&pdev->dev, "no platform data defined\n"); |
371 | return -EINVAL; |
372 | } |
373 | |
374 | keymap_data = pdata->keymap_data; |
375 | if (!keymap_data) { |
376 | dev_err(&pdev->dev, "no keymap data defined\n"); |
377 | return -EINVAL; |
378 | } |
379 | |
380 | if (!pdata->rows || pdata->rows > SAMSUNG_MAX_ROWS) |
381 | return -EINVAL; |
382 | |
383 | if (!pdata->cols || pdata->cols > SAMSUNG_MAX_COLS) |
384 | return -EINVAL; |
385 | |
386 | /* initialize the gpio */ |
387 | if (pdata->cfg_gpio) |
388 | pdata->cfg_gpio(pdata->rows, pdata->cols); |
389 | |
390 | row_shift = get_count_order(pdata->cols); |
391 | keymap_size = (pdata->rows << row_shift) * sizeof(keypad->keycodes[0]); |
392 | |
393 | keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad) + keymap_size, |
394 | GFP_KERNEL); |
395 | input_dev = devm_input_allocate_device(&pdev->dev); |
396 | if (!keypad || !input_dev) |
397 | return -ENOMEM; |
398 | |
399 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
400 | if (!res) |
401 | return -ENODEV; |
402 | |
403 | keypad->base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); |
404 | if (!keypad->base) |
405 | return -EBUSY; |
406 | |
407 | keypad->clk = devm_clk_get(&pdev->dev, "keypad"); |
408 | if (IS_ERR(keypad->clk)) { |
409 | dev_err(&pdev->dev, "failed to get keypad clk\n"); |
410 | return PTR_ERR(keypad->clk); |
411 | } |
412 | |
413 | error = clk_prepare(keypad->clk); |
414 | if (error) { |
415 | dev_err(&pdev->dev, "keypad clock prepare failed\n"); |
416 | return error; |
417 | } |
418 | |
419 | keypad->input_dev = input_dev; |
420 | keypad->pdev = pdev; |
421 | keypad->row_shift = row_shift; |
422 | keypad->rows = pdata->rows; |
423 | keypad->cols = pdata->cols; |
424 | keypad->stopped = true; |
425 | init_waitqueue_head(&keypad->wait); |
426 | |
427 | if (pdev->dev.of_node) { |
428 | #ifdef CONFIG_OF |
429 | samsung_keypad_parse_dt_gpio(&pdev->dev, keypad); |
430 | keypad->type = of_device_is_compatible(pdev->dev.of_node, |
431 | "samsung,s5pv210-keypad"); |
432 | #endif |
433 | } else { |
434 | keypad->type = platform_get_device_id(pdev)->driver_data; |
435 | } |
436 | |
437 | input_dev->name = pdev->name; |
438 | input_dev->id.bustype = BUS_HOST; |
439 | input_dev->dev.parent = &pdev->dev; |
440 | |
441 | input_dev->open = samsung_keypad_open; |
442 | input_dev->close = samsung_keypad_close; |
443 | |
444 | error = matrix_keypad_build_keymap(keymap_data, NULL, |
445 | pdata->rows, pdata->cols, |
446 | keypad->keycodes, input_dev); |
447 | if (error) { |
448 | dev_err(&pdev->dev, "failed to build keymap\n"); |
449 | goto err_unprepare_clk; |
450 | } |
451 | |
452 | input_set_capability(input_dev, EV_MSC, MSC_SCAN); |
453 | if (!pdata->no_autorepeat) |
454 | __set_bit(EV_REP, input_dev->evbit); |
455 | |
456 | input_set_drvdata(input_dev, keypad); |
457 | |
458 | keypad->irq = platform_get_irq(pdev, 0); |
459 | if (keypad->irq < 0) { |
460 | error = keypad->irq; |
461 | goto err_unprepare_clk; |
462 | } |
463 | |
464 | error = devm_request_threaded_irq(&pdev->dev, keypad->irq, NULL, |
465 | samsung_keypad_irq, IRQF_ONESHOT, |
466 | dev_name(&pdev->dev), keypad); |
467 | if (error) { |
468 | dev_err(&pdev->dev, "failed to register keypad interrupt\n"); |
469 | goto err_unprepare_clk; |
470 | } |
471 | |
472 | device_init_wakeup(&pdev->dev, pdata->wakeup); |
473 | platform_set_drvdata(pdev, keypad); |
474 | pm_runtime_enable(&pdev->dev); |
475 | |
476 | error = input_register_device(keypad->input_dev); |
477 | if (error) |
478 | goto err_disable_runtime_pm; |
479 | |
480 | if (pdev->dev.of_node) { |
481 | devm_kfree(&pdev->dev, (void *)pdata->keymap_data->keymap); |
482 | devm_kfree(&pdev->dev, (void *)pdata->keymap_data); |
483 | devm_kfree(&pdev->dev, (void *)pdata); |
484 | } |
485 | return 0; |
486 | |
487 | err_disable_runtime_pm: |
488 | pm_runtime_disable(&pdev->dev); |
489 | device_init_wakeup(&pdev->dev, 0); |
490 | platform_set_drvdata(pdev, NULL); |
491 | err_unprepare_clk: |
492 | clk_unprepare(keypad->clk); |
493 | return error; |
494 | } |
495 | |
496 | static int samsung_keypad_remove(struct platform_device *pdev) |
497 | { |
498 | struct samsung_keypad *keypad = platform_get_drvdata(pdev); |
499 | |
500 | pm_runtime_disable(&pdev->dev); |
501 | device_init_wakeup(&pdev->dev, 0); |
502 | platform_set_drvdata(pdev, NULL); |
503 | |
504 | input_unregister_device(keypad->input_dev); |
505 | |
506 | clk_unprepare(keypad->clk); |
507 | |
508 | return 0; |
509 | } |
510 | |
511 | #ifdef CONFIG_PM_RUNTIME |
512 | static int samsung_keypad_runtime_suspend(struct device *dev) |
513 | { |
514 | struct platform_device *pdev = to_platform_device(dev); |
515 | struct samsung_keypad *keypad = platform_get_drvdata(pdev); |
516 | unsigned int val; |
517 | int error; |
518 | |
519 | if (keypad->stopped) |
520 | return 0; |
521 | |
522 | /* This may fail on some SoCs due to lack of controller support */ |
523 | error = enable_irq_wake(keypad->irq); |
524 | if (!error) |
525 | keypad->wake_enabled = true; |
526 | |
527 | val = readl(keypad->base + SAMSUNG_KEYIFCON); |
528 | val |= SAMSUNG_KEYIFCON_WAKEUPEN; |
529 | writel(val, keypad->base + SAMSUNG_KEYIFCON); |
530 | |
531 | clk_disable(keypad->clk); |
532 | |
533 | return 0; |
534 | } |
535 | |
536 | static int samsung_keypad_runtime_resume(struct device *dev) |
537 | { |
538 | struct platform_device *pdev = to_platform_device(dev); |
539 | struct samsung_keypad *keypad = platform_get_drvdata(pdev); |
540 | unsigned int val; |
541 | |
542 | if (keypad->stopped) |
543 | return 0; |
544 | |
545 | clk_enable(keypad->clk); |
546 | |
547 | val = readl(keypad->base + SAMSUNG_KEYIFCON); |
548 | val &= ~SAMSUNG_KEYIFCON_WAKEUPEN; |
549 | writel(val, keypad->base + SAMSUNG_KEYIFCON); |
550 | |
551 | if (keypad->wake_enabled) |
552 | disable_irq_wake(keypad->irq); |
553 | |
554 | return 0; |
555 | } |
556 | #endif |
557 | |
558 | #ifdef CONFIG_PM_SLEEP |
559 | static void samsung_keypad_toggle_wakeup(struct samsung_keypad *keypad, |
560 | bool enable) |
561 | { |
562 | unsigned int val; |
563 | |
564 | clk_enable(keypad->clk); |
565 | |
566 | val = readl(keypad->base + SAMSUNG_KEYIFCON); |
567 | if (enable) { |
568 | val |= SAMSUNG_KEYIFCON_WAKEUPEN; |
569 | if (device_may_wakeup(&keypad->pdev->dev)) |
570 | enable_irq_wake(keypad->irq); |
571 | } else { |
572 | val &= ~SAMSUNG_KEYIFCON_WAKEUPEN; |
573 | if (device_may_wakeup(&keypad->pdev->dev)) |
574 | disable_irq_wake(keypad->irq); |
575 | } |
576 | writel(val, keypad->base + SAMSUNG_KEYIFCON); |
577 | |
578 | clk_disable(keypad->clk); |
579 | } |
580 | |
581 | static int samsung_keypad_suspend(struct device *dev) |
582 | { |
583 | struct platform_device *pdev = to_platform_device(dev); |
584 | struct samsung_keypad *keypad = platform_get_drvdata(pdev); |
585 | struct input_dev *input_dev = keypad->input_dev; |
586 | |
587 | mutex_lock(&input_dev->mutex); |
588 | |
589 | if (input_dev->users) |
590 | samsung_keypad_stop(keypad); |
591 | |
592 | samsung_keypad_toggle_wakeup(keypad, true); |
593 | |
594 | mutex_unlock(&input_dev->mutex); |
595 | |
596 | return 0; |
597 | } |
598 | |
599 | static int samsung_keypad_resume(struct device *dev) |
600 | { |
601 | struct platform_device *pdev = to_platform_device(dev); |
602 | struct samsung_keypad *keypad = platform_get_drvdata(pdev); |
603 | struct input_dev *input_dev = keypad->input_dev; |
604 | |
605 | mutex_lock(&input_dev->mutex); |
606 | |
607 | samsung_keypad_toggle_wakeup(keypad, false); |
608 | |
609 | if (input_dev->users) |
610 | samsung_keypad_start(keypad); |
611 | |
612 | mutex_unlock(&input_dev->mutex); |
613 | |
614 | return 0; |
615 | } |
616 | #endif |
617 | |
618 | static const struct dev_pm_ops samsung_keypad_pm_ops = { |
619 | SET_SYSTEM_SLEEP_PM_OPS(samsung_keypad_suspend, samsung_keypad_resume) |
620 | SET_RUNTIME_PM_OPS(samsung_keypad_runtime_suspend, |
621 | samsung_keypad_runtime_resume, NULL) |
622 | }; |
623 | |
624 | #ifdef CONFIG_OF |
625 | static const struct of_device_id samsung_keypad_dt_match[] = { |
626 | { .compatible = "samsung,s3c6410-keypad" }, |
627 | { .compatible = "samsung,s5pv210-keypad" }, |
628 | {}, |
629 | }; |
630 | MODULE_DEVICE_TABLE(of, samsung_keypad_dt_match); |
631 | #endif |
632 | |
633 | static struct platform_device_id samsung_keypad_driver_ids[] = { |
634 | { |
635 | .name = "samsung-keypad", |
636 | .driver_data = KEYPAD_TYPE_SAMSUNG, |
637 | }, { |
638 | .name = "s5pv210-keypad", |
639 | .driver_data = KEYPAD_TYPE_S5PV210, |
640 | }, |
641 | { }, |
642 | }; |
643 | MODULE_DEVICE_TABLE(platform, samsung_keypad_driver_ids); |
644 | |
645 | static struct platform_driver samsung_keypad_driver = { |
646 | .probe = samsung_keypad_probe, |
647 | .remove = samsung_keypad_remove, |
648 | .driver = { |
649 | .name = "samsung-keypad", |
650 | .owner = THIS_MODULE, |
651 | .of_match_table = of_match_ptr(samsung_keypad_dt_match), |
652 | .pm = &samsung_keypad_pm_ops, |
653 | }, |
654 | .id_table = samsung_keypad_driver_ids, |
655 | }; |
656 | module_platform_driver(samsung_keypad_driver); |
657 | |
658 | MODULE_DESCRIPTION("Samsung keypad driver"); |
659 | MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); |
660 | MODULE_AUTHOR("Donghwa Lee <dh09.lee@samsung.com>"); |
661 | MODULE_LICENSE("GPL"); |
662 |
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