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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> | |
5a0e3ad6 | 19 | #include <linux/slab.h> |
78a56aab PB |
20 | #include <linux/sysctl.h> |
21 | #include <linux/proc_fs.h> | |
22 | #include <linux/delay.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <linux/input.h> | |
49015bee | 25 | #include <linux/gpio_keys.h> |
da0d03fe | 26 | #include <linux/workqueue.h> |
111bc59c | 27 | #include <linux/gpio.h> |
78a56aab | 28 | |
a33466e3 DES |
29 | struct gpio_button_data { |
30 | struct gpio_keys_button *button; | |
31 | struct input_dev *input; | |
ca865a77 | 32 | struct timer_list timer; |
da0d03fe | 33 | struct work_struct work; |
9e3af04f | 34 | bool disabled; |
a33466e3 DES |
35 | }; |
36 | ||
37 | struct gpio_keys_drvdata { | |
38 | struct input_dev *input; | |
9e3af04f MW |
39 | struct mutex disable_lock; |
40 | unsigned int n_buttons; | |
a33466e3 DES |
41 | struct gpio_button_data data[0]; |
42 | }; | |
43 | ||
9e3af04f MW |
44 | /* |
45 | * SYSFS interface for enabling/disabling keys and switches: | |
46 | * | |
47 | * There are 4 attributes under /sys/devices/platform/gpio-keys/ | |
48 | * keys [ro] - bitmap of keys (EV_KEY) which can be | |
49 | * disabled | |
50 | * switches [ro] - bitmap of switches (EV_SW) which can be | |
51 | * disabled | |
52 | * disabled_keys [rw] - bitmap of keys currently disabled | |
53 | * disabled_switches [rw] - bitmap of switches currently disabled | |
54 | * | |
55 | * Userland can change these values and hence disable event generation | |
56 | * for each key (or switch). Disabling a key means its interrupt line | |
57 | * is disabled. | |
58 | * | |
59 | * For example, if we have following switches set up as gpio-keys: | |
60 | * SW_DOCK = 5 | |
61 | * SW_CAMERA_LENS_COVER = 9 | |
62 | * SW_KEYPAD_SLIDE = 10 | |
63 | * SW_FRONT_PROXIMITY = 11 | |
64 | * This is read from switches: | |
65 | * 11-9,5 | |
66 | * Next we want to disable proximity (11) and dock (5), we write: | |
67 | * 11,5 | |
68 | * to file disabled_switches. Now proximity and dock IRQs are disabled. | |
69 | * This can be verified by reading the file disabled_switches: | |
70 | * 11,5 | |
71 | * If we now want to enable proximity (11) switch we write: | |
72 | * 5 | |
73 | * to disabled_switches. | |
74 | * | |
75 | * We can disable only those keys which don't allow sharing the irq. | |
76 | */ | |
77 | ||
78 | /** | |
79 | * get_n_events_by_type() - returns maximum number of events per @type | |
80 | * @type: type of button (%EV_KEY, %EV_SW) | |
81 | * | |
82 | * Return value of this function can be used to allocate bitmap | |
83 | * large enough to hold all bits for given type. | |
84 | */ | |
85 | static inline int get_n_events_by_type(int type) | |
86 | { | |
87 | BUG_ON(type != EV_SW && type != EV_KEY); | |
88 | ||
89 | return (type == EV_KEY) ? KEY_CNT : SW_CNT; | |
90 | } | |
91 | ||
92 | /** | |
93 | * gpio_keys_disable_button() - disables given GPIO button | |
94 | * @bdata: button data for button to be disabled | |
95 | * | |
96 | * Disables button pointed by @bdata. This is done by masking | |
97 | * IRQ line. After this function is called, button won't generate | |
98 | * input events anymore. Note that one can only disable buttons | |
99 | * that don't share IRQs. | |
100 | * | |
101 | * Make sure that @bdata->disable_lock is locked when entering | |
102 | * this function to avoid races when concurrent threads are | |
103 | * disabling buttons at the same time. | |
104 | */ | |
105 | static void gpio_keys_disable_button(struct gpio_button_data *bdata) | |
106 | { | |
107 | if (!bdata->disabled) { | |
108 | /* | |
109 | * Disable IRQ and possible debouncing timer. | |
110 | */ | |
111 | disable_irq(gpio_to_irq(bdata->button->gpio)); | |
112 | if (bdata->button->debounce_interval) | |
113 | del_timer_sync(&bdata->timer); | |
114 | ||
115 | bdata->disabled = true; | |
116 | } | |
117 | } | |
118 | ||
119 | /** | |
120 | * gpio_keys_enable_button() - enables given GPIO button | |
121 | * @bdata: button data for button to be disabled | |
122 | * | |
123 | * Enables given button pointed by @bdata. | |
124 | * | |
125 | * Make sure that @bdata->disable_lock is locked when entering | |
126 | * this function to avoid races with concurrent threads trying | |
127 | * to enable the same button at the same time. | |
128 | */ | |
129 | static void gpio_keys_enable_button(struct gpio_button_data *bdata) | |
130 | { | |
131 | if (bdata->disabled) { | |
132 | enable_irq(gpio_to_irq(bdata->button->gpio)); | |
133 | bdata->disabled = false; | |
134 | } | |
135 | } | |
136 | ||
137 | /** | |
138 | * gpio_keys_attr_show_helper() - fill in stringified bitmap of buttons | |
139 | * @ddata: pointer to drvdata | |
140 | * @buf: buffer where stringified bitmap is written | |
141 | * @type: button type (%EV_KEY, %EV_SW) | |
142 | * @only_disabled: does caller want only those buttons that are | |
143 | * currently disabled or all buttons that can be | |
144 | * disabled | |
145 | * | |
146 | * This function writes buttons that can be disabled to @buf. If | |
147 | * @only_disabled is true, then @buf contains only those buttons | |
148 | * that are currently disabled. Returns 0 on success or negative | |
149 | * errno on failure. | |
150 | */ | |
151 | static ssize_t gpio_keys_attr_show_helper(struct gpio_keys_drvdata *ddata, | |
152 | char *buf, unsigned int type, | |
153 | bool only_disabled) | |
154 | { | |
155 | int n_events = get_n_events_by_type(type); | |
156 | unsigned long *bits; | |
157 | ssize_t ret; | |
158 | int i; | |
159 | ||
160 | bits = kcalloc(BITS_TO_LONGS(n_events), sizeof(*bits), GFP_KERNEL); | |
161 | if (!bits) | |
162 | return -ENOMEM; | |
163 | ||
164 | for (i = 0; i < ddata->n_buttons; i++) { | |
165 | struct gpio_button_data *bdata = &ddata->data[i]; | |
166 | ||
167 | if (bdata->button->type != type) | |
168 | continue; | |
169 | ||
170 | if (only_disabled && !bdata->disabled) | |
171 | continue; | |
172 | ||
173 | __set_bit(bdata->button->code, bits); | |
174 | } | |
175 | ||
176 | ret = bitmap_scnlistprintf(buf, PAGE_SIZE - 2, bits, n_events); | |
177 | buf[ret++] = '\n'; | |
178 | buf[ret] = '\0'; | |
179 | ||
180 | kfree(bits); | |
181 | ||
182 | return ret; | |
183 | } | |
184 | ||
185 | /** | |
186 | * gpio_keys_attr_store_helper() - enable/disable buttons based on given bitmap | |
187 | * @ddata: pointer to drvdata | |
188 | * @buf: buffer from userspace that contains stringified bitmap | |
189 | * @type: button type (%EV_KEY, %EV_SW) | |
190 | * | |
191 | * This function parses stringified bitmap from @buf and disables/enables | |
192 | * GPIO buttons accordinly. Returns 0 on success and negative error | |
193 | * on failure. | |
194 | */ | |
195 | static ssize_t gpio_keys_attr_store_helper(struct gpio_keys_drvdata *ddata, | |
196 | const char *buf, unsigned int type) | |
197 | { | |
198 | int n_events = get_n_events_by_type(type); | |
199 | unsigned long *bits; | |
200 | ssize_t error; | |
201 | int i; | |
202 | ||
203 | bits = kcalloc(BITS_TO_LONGS(n_events), sizeof(*bits), GFP_KERNEL); | |
204 | if (!bits) | |
205 | return -ENOMEM; | |
206 | ||
207 | error = bitmap_parselist(buf, bits, n_events); | |
208 | if (error) | |
209 | goto out; | |
210 | ||
211 | /* First validate */ | |
212 | for (i = 0; i < ddata->n_buttons; i++) { | |
213 | struct gpio_button_data *bdata = &ddata->data[i]; | |
214 | ||
215 | if (bdata->button->type != type) | |
216 | continue; | |
217 | ||
218 | if (test_bit(bdata->button->code, bits) && | |
219 | !bdata->button->can_disable) { | |
220 | error = -EINVAL; | |
221 | goto out; | |
222 | } | |
223 | } | |
224 | ||
225 | mutex_lock(&ddata->disable_lock); | |
226 | ||
227 | for (i = 0; i < ddata->n_buttons; i++) { | |
228 | struct gpio_button_data *bdata = &ddata->data[i]; | |
229 | ||
230 | if (bdata->button->type != type) | |
231 | continue; | |
232 | ||
233 | if (test_bit(bdata->button->code, bits)) | |
234 | gpio_keys_disable_button(bdata); | |
235 | else | |
236 | gpio_keys_enable_button(bdata); | |
237 | } | |
238 | ||
239 | mutex_unlock(&ddata->disable_lock); | |
240 | ||
241 | out: | |
242 | kfree(bits); | |
243 | return error; | |
244 | } | |
245 | ||
246 | #define ATTR_SHOW_FN(name, type, only_disabled) \ | |
247 | static ssize_t gpio_keys_show_##name(struct device *dev, \ | |
248 | struct device_attribute *attr, \ | |
249 | char *buf) \ | |
250 | { \ | |
251 | struct platform_device *pdev = to_platform_device(dev); \ | |
252 | struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev); \ | |
253 | \ | |
254 | return gpio_keys_attr_show_helper(ddata, buf, \ | |
255 | type, only_disabled); \ | |
256 | } | |
257 | ||
258 | ATTR_SHOW_FN(keys, EV_KEY, false); | |
259 | ATTR_SHOW_FN(switches, EV_SW, false); | |
260 | ATTR_SHOW_FN(disabled_keys, EV_KEY, true); | |
261 | ATTR_SHOW_FN(disabled_switches, EV_SW, true); | |
262 | ||
263 | /* | |
264 | * ATTRIBUTES: | |
265 | * | |
266 | * /sys/devices/platform/gpio-keys/keys [ro] | |
267 | * /sys/devices/platform/gpio-keys/switches [ro] | |
268 | */ | |
269 | static DEVICE_ATTR(keys, S_IRUGO, gpio_keys_show_keys, NULL); | |
270 | static DEVICE_ATTR(switches, S_IRUGO, gpio_keys_show_switches, NULL); | |
271 | ||
272 | #define ATTR_STORE_FN(name, type) \ | |
273 | static ssize_t gpio_keys_store_##name(struct device *dev, \ | |
274 | struct device_attribute *attr, \ | |
275 | const char *buf, \ | |
276 | size_t count) \ | |
277 | { \ | |
278 | struct platform_device *pdev = to_platform_device(dev); \ | |
279 | struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev); \ | |
280 | ssize_t error; \ | |
281 | \ | |
282 | error = gpio_keys_attr_store_helper(ddata, buf, type); \ | |
283 | if (error) \ | |
284 | return error; \ | |
285 | \ | |
286 | return count; \ | |
287 | } | |
288 | ||
289 | ATTR_STORE_FN(disabled_keys, EV_KEY); | |
290 | ATTR_STORE_FN(disabled_switches, EV_SW); | |
291 | ||
292 | /* | |
293 | * ATTRIBUTES: | |
294 | * | |
295 | * /sys/devices/platform/gpio-keys/disabled_keys [rw] | |
296 | * /sys/devices/platform/gpio-keys/disables_switches [rw] | |
297 | */ | |
298 | static DEVICE_ATTR(disabled_keys, S_IWUSR | S_IRUGO, | |
299 | gpio_keys_show_disabled_keys, | |
300 | gpio_keys_store_disabled_keys); | |
301 | static DEVICE_ATTR(disabled_switches, S_IWUSR | S_IRUGO, | |
302 | gpio_keys_show_disabled_switches, | |
303 | gpio_keys_store_disabled_switches); | |
304 | ||
305 | static struct attribute *gpio_keys_attrs[] = { | |
306 | &dev_attr_keys.attr, | |
307 | &dev_attr_switches.attr, | |
308 | &dev_attr_disabled_keys.attr, | |
309 | &dev_attr_disabled_switches.attr, | |
310 | NULL, | |
311 | }; | |
312 | ||
313 | static struct attribute_group gpio_keys_attr_group = { | |
314 | .attrs = gpio_keys_attrs, | |
315 | }; | |
316 | ||
6ee88d71 | 317 | static void gpio_keys_report_event(struct gpio_button_data *bdata) |
a33466e3 | 318 | { |
ce25d7e9 UKK |
319 | struct gpio_keys_button *button = bdata->button; |
320 | struct input_dev *input = bdata->input; | |
a33466e3 DES |
321 | unsigned int type = button->type ?: EV_KEY; |
322 | int state = (gpio_get_value(button->gpio) ? 1 : 0) ^ button->active_low; | |
323 | ||
324 | input_event(input, type, button->code, !!state); | |
325 | input_sync(input); | |
326 | } | |
327 | ||
6ee88d71 DM |
328 | static void gpio_keys_work_func(struct work_struct *work) |
329 | { | |
330 | struct gpio_button_data *bdata = | |
331 | container_of(work, struct gpio_button_data, work); | |
332 | ||
333 | gpio_keys_report_event(bdata); | |
334 | } | |
335 | ||
da0d03fe | 336 | static void gpio_keys_timer(unsigned long _data) |
ca865a77 JN |
337 | { |
338 | struct gpio_button_data *data = (struct gpio_button_data *)_data; | |
339 | ||
da0d03fe | 340 | schedule_work(&data->work); |
ca865a77 JN |
341 | } |
342 | ||
78a56aab PB |
343 | static irqreturn_t gpio_keys_isr(int irq, void *dev_id) |
344 | { | |
57ffe9d5 UKK |
345 | struct gpio_button_data *bdata = dev_id; |
346 | struct gpio_keys_button *button = bdata->button; | |
78a56aab | 347 | |
57ffe9d5 | 348 | BUG_ON(irq != gpio_to_irq(button->gpio)); |
84767d00 | 349 | |
ca865a77 JN |
350 | if (button->debounce_interval) |
351 | mod_timer(&bdata->timer, | |
352 | jiffies + msecs_to_jiffies(button->debounce_interval)); | |
353 | else | |
da0d03fe | 354 | schedule_work(&bdata->work); |
78a56aab | 355 | |
57ffe9d5 | 356 | return IRQ_HANDLED; |
78a56aab PB |
357 | } |
358 | ||
9e3af04f | 359 | static int __devinit gpio_keys_setup_key(struct platform_device *pdev, |
bc8f1eaf BD |
360 | struct gpio_button_data *bdata, |
361 | struct gpio_keys_button *button) | |
362 | { | |
363 | char *desc = button->desc ? button->desc : "gpio_keys"; | |
9e3af04f MW |
364 | struct device *dev = &pdev->dev; |
365 | unsigned long irqflags; | |
bc8f1eaf BD |
366 | int irq, error; |
367 | ||
368 | setup_timer(&bdata->timer, gpio_keys_timer, (unsigned long)bdata); | |
6ee88d71 | 369 | INIT_WORK(&bdata->work, gpio_keys_work_func); |
bc8f1eaf BD |
370 | |
371 | error = gpio_request(button->gpio, desc); | |
372 | if (error < 0) { | |
373 | dev_err(dev, "failed to request GPIO %d, error %d\n", | |
374 | button->gpio, error); | |
375 | goto fail2; | |
376 | } | |
377 | ||
378 | error = gpio_direction_input(button->gpio); | |
379 | if (error < 0) { | |
380 | dev_err(dev, "failed to configure" | |
381 | " direction for GPIO %d, error %d\n", | |
382 | button->gpio, error); | |
383 | goto fail3; | |
384 | } | |
385 | ||
386 | irq = gpio_to_irq(button->gpio); | |
387 | if (irq < 0) { | |
388 | error = irq; | |
389 | dev_err(dev, "Unable to get irq number for GPIO %d, error %d\n", | |
390 | button->gpio, error); | |
391 | goto fail3; | |
392 | } | |
393 | ||
9e3af04f MW |
394 | irqflags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING; |
395 | /* | |
396 | * If platform has specified that the button can be disabled, | |
397 | * we don't want it to share the interrupt line. | |
398 | */ | |
399 | if (!button->can_disable) | |
400 | irqflags |= IRQF_SHARED; | |
401 | ||
402 | error = request_irq(irq, gpio_keys_isr, irqflags, desc, bdata); | |
bc8f1eaf BD |
403 | if (error) { |
404 | dev_err(dev, "Unable to claim irq %d; error %d\n", | |
405 | irq, error); | |
406 | goto fail3; | |
407 | } | |
408 | ||
409 | return 0; | |
410 | ||
411 | fail3: | |
412 | gpio_free(button->gpio); | |
413 | fail2: | |
414 | return error; | |
415 | } | |
416 | ||
78a56aab PB |
417 | static int __devinit gpio_keys_probe(struct platform_device *pdev) |
418 | { | |
419 | struct gpio_keys_platform_data *pdata = pdev->dev.platform_data; | |
a33466e3 | 420 | struct gpio_keys_drvdata *ddata; |
db19fd8b | 421 | struct device *dev = &pdev->dev; |
78a56aab PB |
422 | struct input_dev *input; |
423 | int i, error; | |
e15b0213 | 424 | int wakeup = 0; |
78a56aab | 425 | |
a33466e3 DES |
426 | ddata = kzalloc(sizeof(struct gpio_keys_drvdata) + |
427 | pdata->nbuttons * sizeof(struct gpio_button_data), | |
428 | GFP_KERNEL); | |
78a56aab | 429 | input = input_allocate_device(); |
a33466e3 | 430 | if (!ddata || !input) { |
db19fd8b | 431 | dev_err(dev, "failed to allocate state\n"); |
a33466e3 DES |
432 | error = -ENOMEM; |
433 | goto fail1; | |
434 | } | |
78a56aab | 435 | |
9e3af04f MW |
436 | ddata->input = input; |
437 | ddata->n_buttons = pdata->nbuttons; | |
438 | mutex_init(&ddata->disable_lock); | |
439 | ||
a33466e3 | 440 | platform_set_drvdata(pdev, ddata); |
78a56aab PB |
441 | |
442 | input->name = pdev->name; | |
443 | input->phys = "gpio-keys/input0"; | |
469ba4df | 444 | input->dev.parent = &pdev->dev; |
78a56aab PB |
445 | |
446 | input->id.bustype = BUS_HOST; | |
447 | input->id.vendor = 0x0001; | |
448 | input->id.product = 0x0001; | |
449 | input->id.version = 0x0100; | |
450 | ||
b67b4b11 DC |
451 | /* Enable auto repeat feature of Linux input subsystem */ |
452 | if (pdata->rep) | |
453 | __set_bit(EV_REP, input->evbit); | |
454 | ||
78a56aab | 455 | for (i = 0; i < pdata->nbuttons; i++) { |
84767d00 | 456 | struct gpio_keys_button *button = &pdata->buttons[i]; |
a33466e3 | 457 | struct gpio_button_data *bdata = &ddata->data[i]; |
84767d00 | 458 | unsigned int type = button->type ?: EV_KEY; |
78a56aab | 459 | |
a33466e3 | 460 | bdata->input = input; |
74dd4393 | 461 | bdata->button = button; |
bc8f1eaf | 462 | |
9e3af04f | 463 | error = gpio_keys_setup_key(pdev, bdata, button); |
bc8f1eaf | 464 | if (error) |
a33466e3 | 465 | goto fail2; |
84767d00 | 466 | |
e15b0213 AS |
467 | if (button->wakeup) |
468 | wakeup = 1; | |
469 | ||
84767d00 | 470 | input_set_capability(input, type, button->code); |
78a56aab PB |
471 | } |
472 | ||
9e3af04f | 473 | error = sysfs_create_group(&pdev->dev.kobj, &gpio_keys_attr_group); |
78a56aab | 474 | if (error) { |
9e3af04f MW |
475 | dev_err(dev, "Unable to export keys/switches, error: %d\n", |
476 | error); | |
a33466e3 | 477 | goto fail2; |
78a56aab PB |
478 | } |
479 | ||
9e3af04f MW |
480 | error = input_register_device(input); |
481 | if (error) { | |
482 | dev_err(dev, "Unable to register input device, error: %d\n", | |
483 | error); | |
484 | goto fail3; | |
485 | } | |
486 | ||
6ee88d71 DM |
487 | /* get current state of buttons */ |
488 | for (i = 0; i < pdata->nbuttons; i++) | |
489 | gpio_keys_report_event(&ddata->data[i]); | |
490 | input_sync(input); | |
491 | ||
e15b0213 AS |
492 | device_init_wakeup(&pdev->dev, wakeup); |
493 | ||
78a56aab PB |
494 | return 0; |
495 | ||
9e3af04f MW |
496 | fail3: |
497 | sysfs_remove_group(&pdev->dev.kobj, &gpio_keys_attr_group); | |
a33466e3 | 498 | fail2: |
6a2e3911 | 499 | while (--i >= 0) { |
57ffe9d5 | 500 | free_irq(gpio_to_irq(pdata->buttons[i].gpio), &ddata->data[i]); |
ca865a77 JN |
501 | if (pdata->buttons[i].debounce_interval) |
502 | del_timer_sync(&ddata->data[i].timer); | |
da0d03fe | 503 | cancel_work_sync(&ddata->data[i].work); |
6a2e3911 HVR |
504 | gpio_free(pdata->buttons[i].gpio); |
505 | } | |
78a56aab | 506 | |
006df302 | 507 | platform_set_drvdata(pdev, NULL); |
a33466e3 | 508 | fail1: |
78a56aab | 509 | input_free_device(input); |
a33466e3 | 510 | kfree(ddata); |
78a56aab PB |
511 | |
512 | return error; | |
513 | } | |
514 | ||
515 | static int __devexit gpio_keys_remove(struct platform_device *pdev) | |
516 | { | |
517 | struct gpio_keys_platform_data *pdata = pdev->dev.platform_data; | |
a33466e3 DES |
518 | struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev); |
519 | struct input_dev *input = ddata->input; | |
78a56aab PB |
520 | int i; |
521 | ||
9e3af04f MW |
522 | sysfs_remove_group(&pdev->dev.kobj, &gpio_keys_attr_group); |
523 | ||
e15b0213 AS |
524 | device_init_wakeup(&pdev->dev, 0); |
525 | ||
78a56aab | 526 | for (i = 0; i < pdata->nbuttons; i++) { |
0d98f6bb | 527 | int irq = gpio_to_irq(pdata->buttons[i].gpio); |
57ffe9d5 | 528 | free_irq(irq, &ddata->data[i]); |
ca865a77 JN |
529 | if (pdata->buttons[i].debounce_interval) |
530 | del_timer_sync(&ddata->data[i].timer); | |
da0d03fe | 531 | cancel_work_sync(&ddata->data[i].work); |
6a2e3911 | 532 | gpio_free(pdata->buttons[i].gpio); |
78a56aab PB |
533 | } |
534 | ||
535 | input_unregister_device(input); | |
536 | ||
537 | return 0; | |
538 | } | |
539 | ||
e15b0213 AS |
540 | |
541 | #ifdef CONFIG_PM | |
ae78e0e0 | 542 | static int gpio_keys_suspend(struct device *dev) |
e15b0213 | 543 | { |
ae78e0e0 | 544 | struct platform_device *pdev = to_platform_device(dev); |
e15b0213 AS |
545 | struct gpio_keys_platform_data *pdata = pdev->dev.platform_data; |
546 | int i; | |
547 | ||
548 | if (device_may_wakeup(&pdev->dev)) { | |
549 | for (i = 0; i < pdata->nbuttons; i++) { | |
550 | struct gpio_keys_button *button = &pdata->buttons[i]; | |
551 | if (button->wakeup) { | |
552 | int irq = gpio_to_irq(button->gpio); | |
553 | enable_irq_wake(irq); | |
554 | } | |
555 | } | |
556 | } | |
557 | ||
558 | return 0; | |
559 | } | |
560 | ||
ae78e0e0 | 561 | static int gpio_keys_resume(struct device *dev) |
e15b0213 | 562 | { |
ae78e0e0 | 563 | struct platform_device *pdev = to_platform_device(dev); |
6ee88d71 | 564 | struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev); |
e15b0213 AS |
565 | struct gpio_keys_platform_data *pdata = pdev->dev.platform_data; |
566 | int i; | |
567 | ||
6ee88d71 DM |
568 | for (i = 0; i < pdata->nbuttons; i++) { |
569 | ||
570 | struct gpio_keys_button *button = &pdata->buttons[i]; | |
571 | if (button->wakeup && device_may_wakeup(&pdev->dev)) { | |
572 | int irq = gpio_to_irq(button->gpio); | |
573 | disable_irq_wake(irq); | |
e15b0213 | 574 | } |
6ee88d71 DM |
575 | |
576 | gpio_keys_report_event(&ddata->data[i]); | |
e15b0213 | 577 | } |
6ee88d71 | 578 | input_sync(ddata->input); |
e15b0213 AS |
579 | |
580 | return 0; | |
581 | } | |
ae78e0e0 MR |
582 | |
583 | static const struct dev_pm_ops gpio_keys_pm_ops = { | |
584 | .suspend = gpio_keys_suspend, | |
585 | .resume = gpio_keys_resume, | |
586 | }; | |
e15b0213 AS |
587 | #endif |
588 | ||
9b07044c | 589 | static struct platform_driver gpio_keys_device_driver = { |
78a56aab PB |
590 | .probe = gpio_keys_probe, |
591 | .remove = __devexit_p(gpio_keys_remove), | |
592 | .driver = { | |
593 | .name = "gpio-keys", | |
d7b5247b | 594 | .owner = THIS_MODULE, |
ae78e0e0 MR |
595 | #ifdef CONFIG_PM |
596 | .pm = &gpio_keys_pm_ops, | |
597 | #endif | |
78a56aab PB |
598 | } |
599 | }; | |
600 | ||
601 | static int __init gpio_keys_init(void) | |
602 | { | |
603 | return platform_driver_register(&gpio_keys_device_driver); | |
604 | } | |
605 | ||
606 | static void __exit gpio_keys_exit(void) | |
607 | { | |
608 | platform_driver_unregister(&gpio_keys_device_driver); | |
609 | } | |
610 | ||
611 | module_init(gpio_keys_init); | |
612 | module_exit(gpio_keys_exit); | |
613 | ||
614 | MODULE_LICENSE("GPL"); | |
615 | MODULE_AUTHOR("Phil Blundell <pb@handhelds.org>"); | |
616 | MODULE_DESCRIPTION("Keyboard driver for CPU GPIOs"); | |
d7b5247b | 617 | MODULE_ALIAS("platform:gpio-keys"); |