Commit | Line | Data |
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78a56aab PB |
1 | /* |
2 | * Driver for keys on GPIO lines capable of generating interrupts. | |
3 | * | |
4 | * Copyright 2005 Phil Blundell | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <linux/module.h> | |
78a56aab PB |
12 | |
13 | #include <linux/init.h> | |
14 | #include <linux/fs.h> | |
15 | #include <linux/interrupt.h> | |
16 | #include <linux/irq.h> | |
17 | #include <linux/sched.h> | |
18 | #include <linux/pm.h> | |
19 | #include <linux/sysctl.h> | |
20 | #include <linux/proc_fs.h> | |
21 | #include <linux/delay.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/input.h> | |
49015bee | 24 | #include <linux/gpio_keys.h> |
da0d03fe | 25 | #include <linux/workqueue.h> |
111bc59c | 26 | #include <linux/gpio.h> |
78a56aab | 27 | |
a33466e3 DB |
28 | struct gpio_button_data { |
29 | struct gpio_keys_button *button; | |
30 | struct input_dev *input; | |
ca865a77 | 31 | struct timer_list timer; |
da0d03fe | 32 | struct work_struct work; |
9e3af04f | 33 | bool disabled; |
a33466e3 DB |
34 | }; |
35 | ||
36 | struct gpio_keys_drvdata { | |
37 | struct input_dev *input; | |
9e3af04f MW |
38 | struct mutex disable_lock; |
39 | unsigned int n_buttons; | |
a33466e3 DB |
40 | struct gpio_button_data data[0]; |
41 | }; | |
42 | ||
9e3af04f MW |
43 | /* |
44 | * SYSFS interface for enabling/disabling keys and switches: | |
45 | * | |
46 | * There are 4 attributes under /sys/devices/platform/gpio-keys/ | |
47 | * keys [ro] - bitmap of keys (EV_KEY) which can be | |
48 | * disabled | |
49 | * switches [ro] - bitmap of switches (EV_SW) which can be | |
50 | * disabled | |
51 | * disabled_keys [rw] - bitmap of keys currently disabled | |
52 | * disabled_switches [rw] - bitmap of switches currently disabled | |
53 | * | |
54 | * Userland can change these values and hence disable event generation | |
55 | * for each key (or switch). Disabling a key means its interrupt line | |
56 | * is disabled. | |
57 | * | |
58 | * For example, if we have following switches set up as gpio-keys: | |
59 | * SW_DOCK = 5 | |
60 | * SW_CAMERA_LENS_COVER = 9 | |
61 | * SW_KEYPAD_SLIDE = 10 | |
62 | * SW_FRONT_PROXIMITY = 11 | |
63 | * This is read from switches: | |
64 | * 11-9,5 | |
65 | * Next we want to disable proximity (11) and dock (5), we write: | |
66 | * 11,5 | |
67 | * to file disabled_switches. Now proximity and dock IRQs are disabled. | |
68 | * This can be verified by reading the file disabled_switches: | |
69 | * 11,5 | |
70 | * If we now want to enable proximity (11) switch we write: | |
71 | * 5 | |
72 | * to disabled_switches. | |
73 | * | |
74 | * We can disable only those keys which don't allow sharing the irq. | |
75 | */ | |
76 | ||
77 | /** | |
78 | * get_n_events_by_type() - returns maximum number of events per @type | |
79 | * @type: type of button (%EV_KEY, %EV_SW) | |
80 | * | |
81 | * Return value of this function can be used to allocate bitmap | |
82 | * large enough to hold all bits for given type. | |
83 | */ | |
84 | static inline int get_n_events_by_type(int type) | |
85 | { | |
86 | BUG_ON(type != EV_SW && type != EV_KEY); | |
87 | ||
88 | return (type == EV_KEY) ? KEY_CNT : SW_CNT; | |
89 | } | |
90 | ||
91 | /** | |
92 | * gpio_keys_disable_button() - disables given GPIO button | |
93 | * @bdata: button data for button to be disabled | |
94 | * | |
95 | * Disables button pointed by @bdata. This is done by masking | |
96 | * IRQ line. After this function is called, button won't generate | |
97 | * input events anymore. Note that one can only disable buttons | |
98 | * that don't share IRQs. | |
99 | * | |
100 | * Make sure that @bdata->disable_lock is locked when entering | |
101 | * this function to avoid races when concurrent threads are | |
102 | * disabling buttons at the same time. | |
103 | */ | |
104 | static void gpio_keys_disable_button(struct gpio_button_data *bdata) | |
105 | { | |
106 | if (!bdata->disabled) { | |
107 | /* | |
108 | * Disable IRQ and possible debouncing timer. | |
109 | */ | |
110 | disable_irq(gpio_to_irq(bdata->button->gpio)); | |
111 | if (bdata->button->debounce_interval) | |
112 | del_timer_sync(&bdata->timer); | |
113 | ||
114 | bdata->disabled = true; | |
115 | } | |
116 | } | |
117 | ||
118 | /** | |
119 | * gpio_keys_enable_button() - enables given GPIO button | |
120 | * @bdata: button data for button to be disabled | |
121 | * | |
122 | * Enables given button pointed by @bdata. | |
123 | * | |
124 | * Make sure that @bdata->disable_lock is locked when entering | |
125 | * this function to avoid races with concurrent threads trying | |
126 | * to enable the same button at the same time. | |
127 | */ | |
128 | static void gpio_keys_enable_button(struct gpio_button_data *bdata) | |
129 | { | |
130 | if (bdata->disabled) { | |
131 | enable_irq(gpio_to_irq(bdata->button->gpio)); | |
132 | bdata->disabled = false; | |
133 | } | |
134 | } | |
135 | ||
136 | /** | |
137 | * gpio_keys_attr_show_helper() - fill in stringified bitmap of buttons | |
138 | * @ddata: pointer to drvdata | |
139 | * @buf: buffer where stringified bitmap is written | |
140 | * @type: button type (%EV_KEY, %EV_SW) | |
141 | * @only_disabled: does caller want only those buttons that are | |
142 | * currently disabled or all buttons that can be | |
143 | * disabled | |
144 | * | |
145 | * This function writes buttons that can be disabled to @buf. If | |
146 | * @only_disabled is true, then @buf contains only those buttons | |
147 | * that are currently disabled. Returns 0 on success or negative | |
148 | * errno on failure. | |
149 | */ | |
150 | static ssize_t gpio_keys_attr_show_helper(struct gpio_keys_drvdata *ddata, | |
151 | char *buf, unsigned int type, | |
152 | bool only_disabled) | |
153 | { | |
154 | int n_events = get_n_events_by_type(type); | |
155 | unsigned long *bits; | |
156 | ssize_t ret; | |
157 | int i; | |
158 | ||
159 | bits = kcalloc(BITS_TO_LONGS(n_events), sizeof(*bits), GFP_KERNEL); | |
160 | if (!bits) | |
161 | return -ENOMEM; | |
162 | ||
163 | for (i = 0; i < ddata->n_buttons; i++) { | |
164 | struct gpio_button_data *bdata = &ddata->data[i]; | |
165 | ||
166 | if (bdata->button->type != type) | |
167 | continue; | |
168 | ||
169 | if (only_disabled && !bdata->disabled) | |
170 | continue; | |
171 | ||
172 | __set_bit(bdata->button->code, bits); | |
173 | } | |
174 | ||
175 | ret = bitmap_scnlistprintf(buf, PAGE_SIZE - 2, bits, n_events); | |
176 | buf[ret++] = '\n'; | |
177 | buf[ret] = '\0'; | |
178 | ||
179 | kfree(bits); | |
180 | ||
181 | return ret; | |
182 | } | |
183 | ||
184 | /** | |
185 | * gpio_keys_attr_store_helper() - enable/disable buttons based on given bitmap | |
186 | * @ddata: pointer to drvdata | |
187 | * @buf: buffer from userspace that contains stringified bitmap | |
188 | * @type: button type (%EV_KEY, %EV_SW) | |
189 | * | |
190 | * This function parses stringified bitmap from @buf and disables/enables | |
191 | * GPIO buttons accordinly. Returns 0 on success and negative error | |
192 | * on failure. | |
193 | */ | |
194 | static ssize_t gpio_keys_attr_store_helper(struct gpio_keys_drvdata *ddata, | |
195 | const char *buf, unsigned int type) | |
196 | { | |
197 | int n_events = get_n_events_by_type(type); | |
198 | unsigned long *bits; | |
199 | ssize_t error; | |
200 | int i; | |
201 | ||
202 | bits = kcalloc(BITS_TO_LONGS(n_events), sizeof(*bits), GFP_KERNEL); | |
203 | if (!bits) | |
204 | return -ENOMEM; | |
205 | ||
206 | error = bitmap_parselist(buf, bits, n_events); | |
207 | if (error) | |
208 | goto out; | |
209 | ||
210 | /* First validate */ | |
211 | for (i = 0; i < ddata->n_buttons; i++) { | |
212 | struct gpio_button_data *bdata = &ddata->data[i]; | |
213 | ||
214 | if (bdata->button->type != type) | |
215 | continue; | |
216 | ||
217 | if (test_bit(bdata->button->code, bits) && | |
218 | !bdata->button->can_disable) { | |
219 | error = -EINVAL; | |
220 | goto out; | |
221 | } | |
222 | } | |
223 | ||
224 | mutex_lock(&ddata->disable_lock); | |
225 | ||
226 | for (i = 0; i < ddata->n_buttons; i++) { | |
227 | struct gpio_button_data *bdata = &ddata->data[i]; | |
228 | ||
229 | if (bdata->button->type != type) | |
230 | continue; | |
231 | ||
232 | if (test_bit(bdata->button->code, bits)) | |
233 | gpio_keys_disable_button(bdata); | |
234 | else | |
235 | gpio_keys_enable_button(bdata); | |
236 | } | |
237 | ||
238 | mutex_unlock(&ddata->disable_lock); | |
239 | ||
240 | out: | |
241 | kfree(bits); | |
242 | return error; | |
243 | } | |
244 | ||
245 | #define ATTR_SHOW_FN(name, type, only_disabled) \ | |
246 | static ssize_t gpio_keys_show_##name(struct device *dev, \ | |
247 | struct device_attribute *attr, \ | |
248 | char *buf) \ | |
249 | { \ | |
250 | struct platform_device *pdev = to_platform_device(dev); \ | |
251 | struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev); \ | |
252 | \ | |
253 | return gpio_keys_attr_show_helper(ddata, buf, \ | |
254 | type, only_disabled); \ | |
255 | } | |
256 | ||
257 | ATTR_SHOW_FN(keys, EV_KEY, false); | |
258 | ATTR_SHOW_FN(switches, EV_SW, false); | |
259 | ATTR_SHOW_FN(disabled_keys, EV_KEY, true); | |
260 | ATTR_SHOW_FN(disabled_switches, EV_SW, true); | |
261 | ||
262 | /* | |
263 | * ATTRIBUTES: | |
264 | * | |
265 | * /sys/devices/platform/gpio-keys/keys [ro] | |
266 | * /sys/devices/platform/gpio-keys/switches [ro] | |
267 | */ | |
268 | static DEVICE_ATTR(keys, S_IRUGO, gpio_keys_show_keys, NULL); | |
269 | static DEVICE_ATTR(switches, S_IRUGO, gpio_keys_show_switches, NULL); | |
270 | ||
271 | #define ATTR_STORE_FN(name, type) \ | |
272 | static ssize_t gpio_keys_store_##name(struct device *dev, \ | |
273 | struct device_attribute *attr, \ | |
274 | const char *buf, \ | |
275 | size_t count) \ | |
276 | { \ | |
277 | struct platform_device *pdev = to_platform_device(dev); \ | |
278 | struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev); \ | |
279 | ssize_t error; \ | |
280 | \ | |
281 | error = gpio_keys_attr_store_helper(ddata, buf, type); \ | |
282 | if (error) \ | |
283 | return error; \ | |
284 | \ | |
285 | return count; \ | |
286 | } | |
287 | ||
288 | ATTR_STORE_FN(disabled_keys, EV_KEY); | |
289 | ATTR_STORE_FN(disabled_switches, EV_SW); | |
290 | ||
291 | /* | |
292 | * ATTRIBUTES: | |
293 | * | |
294 | * /sys/devices/platform/gpio-keys/disabled_keys [rw] | |
295 | * /sys/devices/platform/gpio-keys/disables_switches [rw] | |
296 | */ | |
297 | static DEVICE_ATTR(disabled_keys, S_IWUSR | S_IRUGO, | |
298 | gpio_keys_show_disabled_keys, | |
299 | gpio_keys_store_disabled_keys); | |
300 | static DEVICE_ATTR(disabled_switches, S_IWUSR | S_IRUGO, | |
301 | gpio_keys_show_disabled_switches, | |
302 | gpio_keys_store_disabled_switches); | |
303 | ||
304 | static struct attribute *gpio_keys_attrs[] = { | |
305 | &dev_attr_keys.attr, | |
306 | &dev_attr_switches.attr, | |
307 | &dev_attr_disabled_keys.attr, | |
308 | &dev_attr_disabled_switches.attr, | |
309 | NULL, | |
310 | }; | |
311 | ||
312 | static struct attribute_group gpio_keys_attr_group = { | |
313 | .attrs = gpio_keys_attrs, | |
314 | }; | |
315 | ||
6ee88d71 | 316 | static void gpio_keys_report_event(struct gpio_button_data *bdata) |
a33466e3 | 317 | { |
ce25d7e9 UKK |
318 | struct gpio_keys_button *button = bdata->button; |
319 | struct input_dev *input = bdata->input; | |
a33466e3 DB |
320 | unsigned int type = button->type ?: EV_KEY; |
321 | int state = (gpio_get_value(button->gpio) ? 1 : 0) ^ button->active_low; | |
322 | ||
323 | input_event(input, type, button->code, !!state); | |
324 | input_sync(input); | |
325 | } | |
326 | ||
6ee88d71 DM |
327 | static void gpio_keys_work_func(struct work_struct *work) |
328 | { | |
329 | struct gpio_button_data *bdata = | |
330 | container_of(work, struct gpio_button_data, work); | |
331 | ||
332 | gpio_keys_report_event(bdata); | |
333 | } | |
334 | ||
da0d03fe | 335 | static void gpio_keys_timer(unsigned long _data) |
ca865a77 JN |
336 | { |
337 | struct gpio_button_data *data = (struct gpio_button_data *)_data; | |
338 | ||
da0d03fe | 339 | schedule_work(&data->work); |
ca865a77 JN |
340 | } |
341 | ||
78a56aab PB |
342 | static irqreturn_t gpio_keys_isr(int irq, void *dev_id) |
343 | { | |
57ffe9d5 UKK |
344 | struct gpio_button_data *bdata = dev_id; |
345 | struct gpio_keys_button *button = bdata->button; | |
78a56aab | 346 | |
57ffe9d5 | 347 | BUG_ON(irq != gpio_to_irq(button->gpio)); |
84767d00 | 348 | |
ca865a77 JN |
349 | if (button->debounce_interval) |
350 | mod_timer(&bdata->timer, | |
351 | jiffies + msecs_to_jiffies(button->debounce_interval)); | |
352 | else | |
da0d03fe | 353 | schedule_work(&bdata->work); |
78a56aab | 354 | |
57ffe9d5 | 355 | return IRQ_HANDLED; |
78a56aab PB |
356 | } |
357 | ||
9e3af04f | 358 | static int __devinit gpio_keys_setup_key(struct platform_device *pdev, |
bc8f1eaf BD |
359 | struct gpio_button_data *bdata, |
360 | struct gpio_keys_button *button) | |
361 | { | |
362 | char *desc = button->desc ? button->desc : "gpio_keys"; | |
9e3af04f MW |
363 | struct device *dev = &pdev->dev; |
364 | unsigned long irqflags; | |
bc8f1eaf BD |
365 | int irq, error; |
366 | ||
367 | setup_timer(&bdata->timer, gpio_keys_timer, (unsigned long)bdata); | |
6ee88d71 | 368 | INIT_WORK(&bdata->work, gpio_keys_work_func); |
bc8f1eaf BD |
369 | |
370 | error = gpio_request(button->gpio, desc); | |
371 | if (error < 0) { | |
372 | dev_err(dev, "failed to request GPIO %d, error %d\n", | |
373 | button->gpio, error); | |
374 | goto fail2; | |
375 | } | |
376 | ||
377 | error = gpio_direction_input(button->gpio); | |
378 | if (error < 0) { | |
379 | dev_err(dev, "failed to configure" | |
380 | " direction for GPIO %d, error %d\n", | |
381 | button->gpio, error); | |
382 | goto fail3; | |
383 | } | |
384 | ||
385 | irq = gpio_to_irq(button->gpio); | |
386 | if (irq < 0) { | |
387 | error = irq; | |
388 | dev_err(dev, "Unable to get irq number for GPIO %d, error %d\n", | |
389 | button->gpio, error); | |
390 | goto fail3; | |
391 | } | |
392 | ||
9e3af04f MW |
393 | irqflags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING; |
394 | /* | |
395 | * If platform has specified that the button can be disabled, | |
396 | * we don't want it to share the interrupt line. | |
397 | */ | |
398 | if (!button->can_disable) | |
399 | irqflags |= IRQF_SHARED; | |
400 | ||
401 | error = request_irq(irq, gpio_keys_isr, irqflags, desc, bdata); | |
bc8f1eaf BD |
402 | if (error) { |
403 | dev_err(dev, "Unable to claim irq %d; error %d\n", | |
404 | irq, error); | |
405 | goto fail3; | |
406 | } | |
407 | ||
408 | return 0; | |
409 | ||
410 | fail3: | |
411 | gpio_free(button->gpio); | |
412 | fail2: | |
413 | return error; | |
414 | } | |
415 | ||
78a56aab PB |
416 | static int __devinit gpio_keys_probe(struct platform_device *pdev) |
417 | { | |
418 | struct gpio_keys_platform_data *pdata = pdev->dev.platform_data; | |
a33466e3 | 419 | struct gpio_keys_drvdata *ddata; |
db19fd8b | 420 | struct device *dev = &pdev->dev; |
78a56aab PB |
421 | struct input_dev *input; |
422 | int i, error; | |
e15b0213 | 423 | int wakeup = 0; |
78a56aab | 424 | |
a33466e3 DB |
425 | ddata = kzalloc(sizeof(struct gpio_keys_drvdata) + |
426 | pdata->nbuttons * sizeof(struct gpio_button_data), | |
427 | GFP_KERNEL); | |
78a56aab | 428 | input = input_allocate_device(); |
a33466e3 | 429 | if (!ddata || !input) { |
db19fd8b | 430 | dev_err(dev, "failed to allocate state\n"); |
a33466e3 DB |
431 | error = -ENOMEM; |
432 | goto fail1; | |
433 | } | |
78a56aab | 434 | |
9e3af04f MW |
435 | ddata->input = input; |
436 | ddata->n_buttons = pdata->nbuttons; | |
437 | mutex_init(&ddata->disable_lock); | |
438 | ||
a33466e3 | 439 | platform_set_drvdata(pdev, ddata); |
78a56aab PB |
440 | |
441 | input->name = pdev->name; | |
442 | input->phys = "gpio-keys/input0"; | |
469ba4df | 443 | input->dev.parent = &pdev->dev; |
78a56aab PB |
444 | |
445 | input->id.bustype = BUS_HOST; | |
446 | input->id.vendor = 0x0001; | |
447 | input->id.product = 0x0001; | |
448 | input->id.version = 0x0100; | |
449 | ||
b67b4b11 DC |
450 | /* Enable auto repeat feature of Linux input subsystem */ |
451 | if (pdata->rep) | |
452 | __set_bit(EV_REP, input->evbit); | |
453 | ||
78a56aab | 454 | for (i = 0; i < pdata->nbuttons; i++) { |
84767d00 | 455 | struct gpio_keys_button *button = &pdata->buttons[i]; |
a33466e3 | 456 | struct gpio_button_data *bdata = &ddata->data[i]; |
84767d00 | 457 | unsigned int type = button->type ?: EV_KEY; |
78a56aab | 458 | |
a33466e3 | 459 | bdata->input = input; |
74dd4393 | 460 | bdata->button = button; |
bc8f1eaf | 461 | |
9e3af04f | 462 | error = gpio_keys_setup_key(pdev, bdata, button); |
bc8f1eaf | 463 | if (error) |
a33466e3 | 464 | goto fail2; |
84767d00 | 465 | |
e15b0213 AS |
466 | if (button->wakeup) |
467 | wakeup = 1; | |
468 | ||
84767d00 | 469 | input_set_capability(input, type, button->code); |
78a56aab PB |
470 | } |
471 | ||
9e3af04f | 472 | error = sysfs_create_group(&pdev->dev.kobj, &gpio_keys_attr_group); |
78a56aab | 473 | if (error) { |
9e3af04f MW |
474 | dev_err(dev, "Unable to export keys/switches, error: %d\n", |
475 | error); | |
a33466e3 | 476 | goto fail2; |
78a56aab PB |
477 | } |
478 | ||
9e3af04f MW |
479 | error = input_register_device(input); |
480 | if (error) { | |
481 | dev_err(dev, "Unable to register input device, error: %d\n", | |
482 | error); | |
483 | goto fail3; | |
484 | } | |
485 | ||
6ee88d71 DM |
486 | /* get current state of buttons */ |
487 | for (i = 0; i < pdata->nbuttons; i++) | |
488 | gpio_keys_report_event(&ddata->data[i]); | |
489 | input_sync(input); | |
490 | ||
e15b0213 AS |
491 | device_init_wakeup(&pdev->dev, wakeup); |
492 | ||
78a56aab PB |
493 | return 0; |
494 | ||
9e3af04f MW |
495 | fail3: |
496 | sysfs_remove_group(&pdev->dev.kobj, &gpio_keys_attr_group); | |
a33466e3 | 497 | fail2: |
6a2e3911 | 498 | while (--i >= 0) { |
57ffe9d5 | 499 | free_irq(gpio_to_irq(pdata->buttons[i].gpio), &ddata->data[i]); |
ca865a77 JN |
500 | if (pdata->buttons[i].debounce_interval) |
501 | del_timer_sync(&ddata->data[i].timer); | |
da0d03fe | 502 | cancel_work_sync(&ddata->data[i].work); |
6a2e3911 HVR |
503 | gpio_free(pdata->buttons[i].gpio); |
504 | } | |
78a56aab | 505 | |
006df302 | 506 | platform_set_drvdata(pdev, NULL); |
a33466e3 | 507 | fail1: |
78a56aab | 508 | input_free_device(input); |
a33466e3 | 509 | kfree(ddata); |
78a56aab PB |
510 | |
511 | return error; | |
512 | } | |
513 | ||
514 | static int __devexit gpio_keys_remove(struct platform_device *pdev) | |
515 | { | |
516 | struct gpio_keys_platform_data *pdata = pdev->dev.platform_data; | |
a33466e3 DB |
517 | struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev); |
518 | struct input_dev *input = ddata->input; | |
78a56aab PB |
519 | int i; |
520 | ||
9e3af04f MW |
521 | sysfs_remove_group(&pdev->dev.kobj, &gpio_keys_attr_group); |
522 | ||
e15b0213 AS |
523 | device_init_wakeup(&pdev->dev, 0); |
524 | ||
78a56aab | 525 | for (i = 0; i < pdata->nbuttons; i++) { |
0d98f6bb | 526 | int irq = gpio_to_irq(pdata->buttons[i].gpio); |
57ffe9d5 | 527 | free_irq(irq, &ddata->data[i]); |
ca865a77 JN |
528 | if (pdata->buttons[i].debounce_interval) |
529 | del_timer_sync(&ddata->data[i].timer); | |
da0d03fe | 530 | cancel_work_sync(&ddata->data[i].work); |
6a2e3911 | 531 | gpio_free(pdata->buttons[i].gpio); |
78a56aab PB |
532 | } |
533 | ||
534 | input_unregister_device(input); | |
535 | ||
536 | return 0; | |
537 | } | |
538 | ||
e15b0213 AS |
539 | |
540 | #ifdef CONFIG_PM | |
ae78e0e0 | 541 | static int gpio_keys_suspend(struct device *dev) |
e15b0213 | 542 | { |
ae78e0e0 | 543 | struct platform_device *pdev = to_platform_device(dev); |
e15b0213 AS |
544 | struct gpio_keys_platform_data *pdata = pdev->dev.platform_data; |
545 | int i; | |
546 | ||
547 | if (device_may_wakeup(&pdev->dev)) { | |
548 | for (i = 0; i < pdata->nbuttons; i++) { | |
549 | struct gpio_keys_button *button = &pdata->buttons[i]; | |
550 | if (button->wakeup) { | |
551 | int irq = gpio_to_irq(button->gpio); | |
552 | enable_irq_wake(irq); | |
553 | } | |
554 | } | |
555 | } | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
ae78e0e0 | 560 | static int gpio_keys_resume(struct device *dev) |
e15b0213 | 561 | { |
ae78e0e0 | 562 | struct platform_device *pdev = to_platform_device(dev); |
6ee88d71 | 563 | struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev); |
e15b0213 AS |
564 | struct gpio_keys_platform_data *pdata = pdev->dev.platform_data; |
565 | int i; | |
566 | ||
6ee88d71 DM |
567 | for (i = 0; i < pdata->nbuttons; i++) { |
568 | ||
569 | struct gpio_keys_button *button = &pdata->buttons[i]; | |
570 | if (button->wakeup && device_may_wakeup(&pdev->dev)) { | |
571 | int irq = gpio_to_irq(button->gpio); | |
572 | disable_irq_wake(irq); | |
e15b0213 | 573 | } |
6ee88d71 DM |
574 | |
575 | gpio_keys_report_event(&ddata->data[i]); | |
e15b0213 | 576 | } |
6ee88d71 | 577 | input_sync(ddata->input); |
e15b0213 AS |
578 | |
579 | return 0; | |
580 | } | |
ae78e0e0 MR |
581 | |
582 | static const struct dev_pm_ops gpio_keys_pm_ops = { | |
583 | .suspend = gpio_keys_suspend, | |
584 | .resume = gpio_keys_resume, | |
585 | }; | |
e15b0213 AS |
586 | #endif |
587 | ||
9b07044c | 588 | static struct platform_driver gpio_keys_device_driver = { |
78a56aab PB |
589 | .probe = gpio_keys_probe, |
590 | .remove = __devexit_p(gpio_keys_remove), | |
591 | .driver = { | |
592 | .name = "gpio-keys", | |
d7b5247b | 593 | .owner = THIS_MODULE, |
ae78e0e0 MR |
594 | #ifdef CONFIG_PM |
595 | .pm = &gpio_keys_pm_ops, | |
596 | #endif | |
78a56aab PB |
597 | } |
598 | }; | |
599 | ||
600 | static int __init gpio_keys_init(void) | |
601 | { | |
602 | return platform_driver_register(&gpio_keys_device_driver); | |
603 | } | |
604 | ||
605 | static void __exit gpio_keys_exit(void) | |
606 | { | |
607 | platform_driver_unregister(&gpio_keys_device_driver); | |
608 | } | |
609 | ||
610 | module_init(gpio_keys_init); | |
611 | module_exit(gpio_keys_exit); | |
612 | ||
613 | MODULE_LICENSE("GPL"); | |
614 | MODULE_AUTHOR("Phil Blundell <pb@handhelds.org>"); | |
615 | MODULE_DESCRIPTION("Keyboard driver for CPU GPIOs"); | |
d7b5247b | 616 | MODULE_ALIAS("platform:gpio-keys"); |