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1 | /* |
2 | * gpio-fan.c - Hwmon driver for fans connected to GPIO lines. |
3 | * |
4 | * Copyright (C) 2010 LaCie |
5 | * |
6 | * Author: Simon Guinot <sguinot@lacie.com> |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by |
10 | * the Free Software Foundation; either version 2 of the License, or |
11 | * (at your option) any later version. |
12 | * |
13 | * This program is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | * GNU General Public License for more details. |
17 | * |
18 | * You should have received a copy of the GNU General Public License |
19 | * along with this program; if not, write to the Free Software |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
21 | */ |
22 | |
23 | #include <linux/module.h> |
24 | #include <linux/init.h> |
25 | #include <linux/slab.h> |
26 | #include <linux/interrupt.h> |
27 | #include <linux/irq.h> |
28 | #include <linux/platform_device.h> |
29 | #include <linux/err.h> |
30 | #include <linux/mutex.h> |
31 | #include <linux/hwmon.h> |
32 | #include <linux/gpio.h> |
33 | #include <linux/gpio-fan.h> |
34 | #include <linux/of_platform.h> |
35 | #include <linux/of_gpio.h> |
36 | |
37 | struct gpio_fan_data { |
38 | struct platform_device *pdev; |
39 | struct device *hwmon_dev; |
40 | struct mutex lock; /* lock GPIOs operations. */ |
41 | int num_ctrl; |
42 | unsigned *ctrl; |
43 | int num_speed; |
44 | struct gpio_fan_speed *speed; |
45 | int speed_index; |
46 | #ifdef CONFIG_PM_SLEEP |
47 | int resume_speed; |
48 | #endif |
49 | bool pwm_enable; |
50 | struct gpio_fan_alarm *alarm; |
51 | struct work_struct alarm_work; |
52 | }; |
53 | |
54 | /* |
55 | * Alarm GPIO. |
56 | */ |
57 | |
58 | static void fan_alarm_notify(struct work_struct *ws) |
59 | { |
60 | struct gpio_fan_data *fan_data = |
61 | container_of(ws, struct gpio_fan_data, alarm_work); |
62 | |
63 | sysfs_notify(&fan_data->pdev->dev.kobj, NULL, "fan1_alarm"); |
64 | kobject_uevent(&fan_data->pdev->dev.kobj, KOBJ_CHANGE); |
65 | } |
66 | |
67 | static irqreturn_t fan_alarm_irq_handler(int irq, void *dev_id) |
68 | { |
69 | struct gpio_fan_data *fan_data = dev_id; |
70 | |
71 | schedule_work(&fan_data->alarm_work); |
72 | |
73 | return IRQ_NONE; |
74 | } |
75 | |
76 | static ssize_t show_fan_alarm(struct device *dev, |
77 | struct device_attribute *attr, char *buf) |
78 | { |
79 | struct gpio_fan_data *fan_data = dev_get_drvdata(dev); |
80 | struct gpio_fan_alarm *alarm = fan_data->alarm; |
81 | int value = gpio_get_value(alarm->gpio); |
82 | |
83 | if (alarm->active_low) |
84 | value = !value; |
85 | |
86 | return sprintf(buf, "%d\n", value); |
87 | } |
88 | |
89 | static DEVICE_ATTR(fan1_alarm, S_IRUGO, show_fan_alarm, NULL); |
90 | |
91 | static int fan_alarm_init(struct gpio_fan_data *fan_data, |
92 | struct gpio_fan_alarm *alarm) |
93 | { |
94 | int err; |
95 | int alarm_irq; |
96 | struct platform_device *pdev = fan_data->pdev; |
97 | |
98 | fan_data->alarm = alarm; |
99 | |
100 | err = devm_gpio_request(&pdev->dev, alarm->gpio, "GPIO fan alarm"); |
101 | if (err) |
102 | return err; |
103 | |
104 | err = gpio_direction_input(alarm->gpio); |
105 | if (err) |
106 | return err; |
107 | |
108 | err = device_create_file(&pdev->dev, &dev_attr_fan1_alarm); |
109 | if (err) |
110 | return err; |
111 | |
112 | /* |
113 | * If the alarm GPIO don't support interrupts, just leave |
114 | * without initializing the fail notification support. |
115 | */ |
116 | alarm_irq = gpio_to_irq(alarm->gpio); |
117 | if (alarm_irq < 0) |
118 | return 0; |
119 | |
120 | INIT_WORK(&fan_data->alarm_work, fan_alarm_notify); |
121 | irq_set_irq_type(alarm_irq, IRQ_TYPE_EDGE_BOTH); |
122 | err = devm_request_irq(&pdev->dev, alarm_irq, fan_alarm_irq_handler, |
123 | IRQF_SHARED, "GPIO fan alarm", fan_data); |
124 | if (err) |
125 | goto err_free_sysfs; |
126 | |
127 | return 0; |
128 | |
129 | err_free_sysfs: |
130 | device_remove_file(&pdev->dev, &dev_attr_fan1_alarm); |
131 | return err; |
132 | } |
133 | |
134 | static void fan_alarm_free(struct gpio_fan_data *fan_data) |
135 | { |
136 | struct platform_device *pdev = fan_data->pdev; |
137 | |
138 | device_remove_file(&pdev->dev, &dev_attr_fan1_alarm); |
139 | } |
140 | |
141 | /* |
142 | * Control GPIOs. |
143 | */ |
144 | |
145 | /* Must be called with fan_data->lock held, except during initialization. */ |
146 | static void __set_fan_ctrl(struct gpio_fan_data *fan_data, int ctrl_val) |
147 | { |
148 | int i; |
149 | |
150 | for (i = 0; i < fan_data->num_ctrl; i++) |
151 | gpio_set_value(fan_data->ctrl[i], (ctrl_val >> i) & 1); |
152 | } |
153 | |
154 | static int __get_fan_ctrl(struct gpio_fan_data *fan_data) |
155 | { |
156 | int i; |
157 | int ctrl_val = 0; |
158 | |
159 | for (i = 0; i < fan_data->num_ctrl; i++) { |
160 | int value; |
161 | |
162 | value = gpio_get_value(fan_data->ctrl[i]); |
163 | ctrl_val |= (value << i); |
164 | } |
165 | return ctrl_val; |
166 | } |
167 | |
168 | /* Must be called with fan_data->lock held, except during initialization. */ |
169 | static void set_fan_speed(struct gpio_fan_data *fan_data, int speed_index) |
170 | { |
171 | if (fan_data->speed_index == speed_index) |
172 | return; |
173 | |
174 | __set_fan_ctrl(fan_data, fan_data->speed[speed_index].ctrl_val); |
175 | fan_data->speed_index = speed_index; |
176 | } |
177 | |
178 | static int get_fan_speed_index(struct gpio_fan_data *fan_data) |
179 | { |
180 | int ctrl_val = __get_fan_ctrl(fan_data); |
181 | int i; |
182 | |
183 | for (i = 0; i < fan_data->num_speed; i++) |
184 | if (fan_data->speed[i].ctrl_val == ctrl_val) |
185 | return i; |
186 | |
187 | dev_warn(&fan_data->pdev->dev, |
188 | "missing speed array entry for GPIO value 0x%x\n", ctrl_val); |
189 | |
190 | return -EINVAL; |
191 | } |
192 | |
193 | static int rpm_to_speed_index(struct gpio_fan_data *fan_data, int rpm) |
194 | { |
195 | struct gpio_fan_speed *speed = fan_data->speed; |
196 | int i; |
197 | |
198 | for (i = 0; i < fan_data->num_speed; i++) |
199 | if (speed[i].rpm >= rpm) |
200 | return i; |
201 | |
202 | return fan_data->num_speed - 1; |
203 | } |
204 | |
205 | static ssize_t show_pwm(struct device *dev, |
206 | struct device_attribute *attr, char *buf) |
207 | { |
208 | struct gpio_fan_data *fan_data = dev_get_drvdata(dev); |
209 | u8 pwm = fan_data->speed_index * 255 / (fan_data->num_speed - 1); |
210 | |
211 | return sprintf(buf, "%d\n", pwm); |
212 | } |
213 | |
214 | static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, |
215 | const char *buf, size_t count) |
216 | { |
217 | struct gpio_fan_data *fan_data = dev_get_drvdata(dev); |
218 | unsigned long pwm; |
219 | int speed_index; |
220 | int ret = count; |
221 | |
222 | if (kstrtoul(buf, 10, &pwm) || pwm > 255) |
223 | return -EINVAL; |
224 | |
225 | mutex_lock(&fan_data->lock); |
226 | |
227 | if (!fan_data->pwm_enable) { |
228 | ret = -EPERM; |
229 | goto exit_unlock; |
230 | } |
231 | |
232 | speed_index = DIV_ROUND_UP(pwm * (fan_data->num_speed - 1), 255); |
233 | set_fan_speed(fan_data, speed_index); |
234 | |
235 | exit_unlock: |
236 | mutex_unlock(&fan_data->lock); |
237 | |
238 | return ret; |
239 | } |
240 | |
241 | static ssize_t show_pwm_enable(struct device *dev, |
242 | struct device_attribute *attr, char *buf) |
243 | { |
244 | struct gpio_fan_data *fan_data = dev_get_drvdata(dev); |
245 | |
246 | return sprintf(buf, "%d\n", fan_data->pwm_enable); |
247 | } |
248 | |
249 | static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr, |
250 | const char *buf, size_t count) |
251 | { |
252 | struct gpio_fan_data *fan_data = dev_get_drvdata(dev); |
253 | unsigned long val; |
254 | |
255 | if (kstrtoul(buf, 10, &val) || val > 1) |
256 | return -EINVAL; |
257 | |
258 | if (fan_data->pwm_enable == val) |
259 | return count; |
260 | |
261 | mutex_lock(&fan_data->lock); |
262 | |
263 | fan_data->pwm_enable = val; |
264 | |
265 | /* Disable manual control mode: set fan at full speed. */ |
266 | if (val == 0) |
267 | set_fan_speed(fan_data, fan_data->num_speed - 1); |
268 | |
269 | mutex_unlock(&fan_data->lock); |
270 | |
271 | return count; |
272 | } |
273 | |
274 | static ssize_t show_pwm_mode(struct device *dev, |
275 | struct device_attribute *attr, char *buf) |
276 | { |
277 | return sprintf(buf, "0\n"); |
278 | } |
279 | |
280 | static ssize_t show_rpm_min(struct device *dev, |
281 | struct device_attribute *attr, char *buf) |
282 | { |
283 | struct gpio_fan_data *fan_data = dev_get_drvdata(dev); |
284 | |
285 | return sprintf(buf, "%d\n", fan_data->speed[0].rpm); |
286 | } |
287 | |
288 | static ssize_t show_rpm_max(struct device *dev, |
289 | struct device_attribute *attr, char *buf) |
290 | { |
291 | struct gpio_fan_data *fan_data = dev_get_drvdata(dev); |
292 | |
293 | return sprintf(buf, "%d\n", |
294 | fan_data->speed[fan_data->num_speed - 1].rpm); |
295 | } |
296 | |
297 | static ssize_t show_rpm(struct device *dev, |
298 | struct device_attribute *attr, char *buf) |
299 | { |
300 | struct gpio_fan_data *fan_data = dev_get_drvdata(dev); |
301 | |
302 | return sprintf(buf, "%d\n", fan_data->speed[fan_data->speed_index].rpm); |
303 | } |
304 | |
305 | static ssize_t set_rpm(struct device *dev, struct device_attribute *attr, |
306 | const char *buf, size_t count) |
307 | { |
308 | struct gpio_fan_data *fan_data = dev_get_drvdata(dev); |
309 | unsigned long rpm; |
310 | int ret = count; |
311 | |
312 | if (kstrtoul(buf, 10, &rpm)) |
313 | return -EINVAL; |
314 | |
315 | mutex_lock(&fan_data->lock); |
316 | |
317 | if (!fan_data->pwm_enable) { |
318 | ret = -EPERM; |
319 | goto exit_unlock; |
320 | } |
321 | |
322 | set_fan_speed(fan_data, rpm_to_speed_index(fan_data, rpm)); |
323 | |
324 | exit_unlock: |
325 | mutex_unlock(&fan_data->lock); |
326 | |
327 | return ret; |
328 | } |
329 | |
330 | static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm); |
331 | static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, |
332 | show_pwm_enable, set_pwm_enable); |
333 | static DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL); |
334 | static DEVICE_ATTR(fan1_min, S_IRUGO, show_rpm_min, NULL); |
335 | static DEVICE_ATTR(fan1_max, S_IRUGO, show_rpm_max, NULL); |
336 | static DEVICE_ATTR(fan1_input, S_IRUGO, show_rpm, NULL); |
337 | static DEVICE_ATTR(fan1_target, S_IRUGO | S_IWUSR, show_rpm, set_rpm); |
338 | |
339 | static struct attribute *gpio_fan_ctrl_attributes[] = { |
340 | &dev_attr_pwm1.attr, |
341 | &dev_attr_pwm1_enable.attr, |
342 | &dev_attr_pwm1_mode.attr, |
343 | &dev_attr_fan1_input.attr, |
344 | &dev_attr_fan1_target.attr, |
345 | &dev_attr_fan1_min.attr, |
346 | &dev_attr_fan1_max.attr, |
347 | NULL |
348 | }; |
349 | |
350 | static const struct attribute_group gpio_fan_ctrl_group = { |
351 | .attrs = gpio_fan_ctrl_attributes, |
352 | }; |
353 | |
354 | static int fan_ctrl_init(struct gpio_fan_data *fan_data, |
355 | struct gpio_fan_platform_data *pdata) |
356 | { |
357 | struct platform_device *pdev = fan_data->pdev; |
358 | int num_ctrl = pdata->num_ctrl; |
359 | unsigned *ctrl = pdata->ctrl; |
360 | int i, err; |
361 | |
362 | for (i = 0; i < num_ctrl; i++) { |
363 | err = devm_gpio_request(&pdev->dev, ctrl[i], |
364 | "GPIO fan control"); |
365 | if (err) |
366 | return err; |
367 | |
368 | err = gpio_direction_output(ctrl[i], gpio_get_value(ctrl[i])); |
369 | if (err) |
370 | return err; |
371 | } |
372 | |
373 | fan_data->num_ctrl = num_ctrl; |
374 | fan_data->ctrl = ctrl; |
375 | fan_data->num_speed = pdata->num_speed; |
376 | fan_data->speed = pdata->speed; |
377 | fan_data->pwm_enable = true; /* Enable manual fan speed control. */ |
378 | fan_data->speed_index = get_fan_speed_index(fan_data); |
379 | if (fan_data->speed_index < 0) |
380 | return -ENODEV; |
381 | |
382 | err = sysfs_create_group(&pdev->dev.kobj, &gpio_fan_ctrl_group); |
383 | return err; |
384 | } |
385 | |
386 | static void fan_ctrl_free(struct gpio_fan_data *fan_data) |
387 | { |
388 | struct platform_device *pdev = fan_data->pdev; |
389 | |
390 | sysfs_remove_group(&pdev->dev.kobj, &gpio_fan_ctrl_group); |
391 | } |
392 | |
393 | /* |
394 | * Platform driver. |
395 | */ |
396 | |
397 | static ssize_t show_name(struct device *dev, |
398 | struct device_attribute *attr, char *buf) |
399 | { |
400 | return sprintf(buf, "gpio-fan\n"); |
401 | } |
402 | |
403 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); |
404 | |
405 | |
406 | #ifdef CONFIG_OF_GPIO |
407 | /* |
408 | * Translate OpenFirmware node properties into platform_data |
409 | */ |
410 | static int gpio_fan_get_of_pdata(struct device *dev, |
411 | struct gpio_fan_platform_data *pdata) |
412 | { |
413 | struct device_node *node; |
414 | struct gpio_fan_speed *speed; |
415 | unsigned *ctrl; |
416 | unsigned i; |
417 | u32 u; |
418 | struct property *prop; |
419 | const __be32 *p; |
420 | |
421 | node = dev->of_node; |
422 | |
423 | /* Fill GPIO pin array */ |
424 | pdata->num_ctrl = of_gpio_count(node); |
425 | if (pdata->num_ctrl <= 0) { |
426 | dev_err(dev, "gpios DT property empty / missing"); |
427 | return -ENODEV; |
428 | } |
429 | ctrl = devm_kzalloc(dev, pdata->num_ctrl * sizeof(unsigned), |
430 | GFP_KERNEL); |
431 | if (!ctrl) |
432 | return -ENOMEM; |
433 | for (i = 0; i < pdata->num_ctrl; i++) { |
434 | int val; |
435 | |
436 | val = of_get_gpio(node, i); |
437 | if (val < 0) |
438 | return val; |
439 | ctrl[i] = val; |
440 | } |
441 | pdata->ctrl = ctrl; |
442 | |
443 | /* Get number of RPM/ctrl_val pairs in speed map */ |
444 | prop = of_find_property(node, "gpio-fan,speed-map", &i); |
445 | if (!prop) { |
446 | dev_err(dev, "gpio-fan,speed-map DT property missing"); |
447 | return -ENODEV; |
448 | } |
449 | i = i / sizeof(u32); |
450 | if (i == 0 || i & 1) { |
451 | dev_err(dev, "gpio-fan,speed-map contains zero/odd number of entries"); |
452 | return -ENODEV; |
453 | } |
454 | pdata->num_speed = i / 2; |
455 | |
456 | /* |
457 | * Populate speed map |
458 | * Speed map is in the form <RPM ctrl_val RPM ctrl_val ...> |
459 | * this needs splitting into pairs to create gpio_fan_speed structs |
460 | */ |
461 | speed = devm_kzalloc(dev, |
462 | pdata->num_speed * sizeof(struct gpio_fan_speed), |
463 | GFP_KERNEL); |
464 | if (!speed) |
465 | return -ENOMEM; |
466 | p = NULL; |
467 | for (i = 0; i < pdata->num_speed; i++) { |
468 | p = of_prop_next_u32(prop, p, &u); |
469 | if (!p) |
470 | return -ENODEV; |
471 | speed[i].rpm = u; |
472 | p = of_prop_next_u32(prop, p, &u); |
473 | if (!p) |
474 | return -ENODEV; |
475 | speed[i].ctrl_val = u; |
476 | } |
477 | pdata->speed = speed; |
478 | |
479 | /* Alarm GPIO if one exists */ |
480 | if (of_gpio_named_count(node, "alarm-gpios") > 0) { |
481 | struct gpio_fan_alarm *alarm; |
482 | int val; |
483 | enum of_gpio_flags flags; |
484 | |
485 | alarm = devm_kzalloc(dev, sizeof(struct gpio_fan_alarm), |
486 | GFP_KERNEL); |
487 | if (!alarm) |
488 | return -ENOMEM; |
489 | |
490 | val = of_get_named_gpio_flags(node, "alarm-gpios", 0, &flags); |
491 | if (val < 0) |
492 | return val; |
493 | alarm->gpio = val; |
494 | alarm->active_low = flags & OF_GPIO_ACTIVE_LOW; |
495 | |
496 | pdata->alarm = alarm; |
497 | } |
498 | |
499 | return 0; |
500 | } |
501 | |
502 | static struct of_device_id of_gpio_fan_match[] = { |
503 | { .compatible = "gpio-fan", }, |
504 | {}, |
505 | }; |
506 | #endif /* CONFIG_OF_GPIO */ |
507 | |
508 | static int gpio_fan_probe(struct platform_device *pdev) |
509 | { |
510 | int err; |
511 | struct gpio_fan_data *fan_data; |
512 | struct gpio_fan_platform_data *pdata = pdev->dev.platform_data; |
513 | |
514 | #ifdef CONFIG_OF_GPIO |
515 | if (!pdata) { |
516 | pdata = devm_kzalloc(&pdev->dev, |
517 | sizeof(struct gpio_fan_platform_data), |
518 | GFP_KERNEL); |
519 | if (!pdata) |
520 | return -ENOMEM; |
521 | |
522 | err = gpio_fan_get_of_pdata(&pdev->dev, pdata); |
523 | if (err) |
524 | return err; |
525 | } |
526 | #else /* CONFIG_OF_GPIO */ |
527 | if (!pdata) |
528 | return -EINVAL; |
529 | #endif /* CONFIG_OF_GPIO */ |
530 | |
531 | fan_data = devm_kzalloc(&pdev->dev, sizeof(struct gpio_fan_data), |
532 | GFP_KERNEL); |
533 | if (!fan_data) |
534 | return -ENOMEM; |
535 | |
536 | fan_data->pdev = pdev; |
537 | platform_set_drvdata(pdev, fan_data); |
538 | mutex_init(&fan_data->lock); |
539 | |
540 | /* Configure alarm GPIO if available. */ |
541 | if (pdata->alarm) { |
542 | err = fan_alarm_init(fan_data, pdata->alarm); |
543 | if (err) |
544 | return err; |
545 | } |
546 | |
547 | /* Configure control GPIOs if available. */ |
548 | if (pdata->ctrl && pdata->num_ctrl > 0) { |
549 | if (!pdata->speed || pdata->num_speed <= 1) { |
550 | err = -EINVAL; |
551 | goto err_free_alarm; |
552 | } |
553 | err = fan_ctrl_init(fan_data, pdata); |
554 | if (err) |
555 | goto err_free_alarm; |
556 | } |
557 | |
558 | err = device_create_file(&pdev->dev, &dev_attr_name); |
559 | if (err) |
560 | goto err_free_ctrl; |
561 | |
562 | /* Make this driver part of hwmon class. */ |
563 | fan_data->hwmon_dev = hwmon_device_register(&pdev->dev); |
564 | if (IS_ERR(fan_data->hwmon_dev)) { |
565 | err = PTR_ERR(fan_data->hwmon_dev); |
566 | goto err_remove_name; |
567 | } |
568 | |
569 | dev_info(&pdev->dev, "GPIO fan initialized\n"); |
570 | |
571 | return 0; |
572 | |
573 | err_remove_name: |
574 | device_remove_file(&pdev->dev, &dev_attr_name); |
575 | err_free_ctrl: |
576 | if (fan_data->ctrl) |
577 | fan_ctrl_free(fan_data); |
578 | err_free_alarm: |
579 | if (fan_data->alarm) |
580 | fan_alarm_free(fan_data); |
581 | return err; |
582 | } |
583 | |
584 | static int gpio_fan_remove(struct platform_device *pdev) |
585 | { |
586 | struct gpio_fan_data *fan_data = platform_get_drvdata(pdev); |
587 | |
588 | hwmon_device_unregister(fan_data->hwmon_dev); |
589 | device_remove_file(&pdev->dev, &dev_attr_name); |
590 | if (fan_data->alarm) |
591 | fan_alarm_free(fan_data); |
592 | if (fan_data->ctrl) |
593 | fan_ctrl_free(fan_data); |
594 | |
595 | return 0; |
596 | } |
597 | |
598 | #ifdef CONFIG_PM_SLEEP |
599 | static int gpio_fan_suspend(struct device *dev) |
600 | { |
601 | struct gpio_fan_data *fan_data = dev_get_drvdata(dev); |
602 | |
603 | if (fan_data->ctrl) { |
604 | fan_data->resume_speed = fan_data->speed_index; |
605 | set_fan_speed(fan_data, 0); |
606 | } |
607 | |
608 | return 0; |
609 | } |
610 | |
611 | static int gpio_fan_resume(struct device *dev) |
612 | { |
613 | struct gpio_fan_data *fan_data = dev_get_drvdata(dev); |
614 | |
615 | if (fan_data->ctrl) |
616 | set_fan_speed(fan_data, fan_data->resume_speed); |
617 | |
618 | return 0; |
619 | } |
620 | |
621 | static SIMPLE_DEV_PM_OPS(gpio_fan_pm, gpio_fan_suspend, gpio_fan_resume); |
622 | #define GPIO_FAN_PM &gpio_fan_pm |
623 | #else |
624 | #define GPIO_FAN_PM NULL |
625 | #endif |
626 | |
627 | static struct platform_driver gpio_fan_driver = { |
628 | .probe = gpio_fan_probe, |
629 | .remove = gpio_fan_remove, |
630 | .driver = { |
631 | .name = "gpio-fan", |
632 | .pm = GPIO_FAN_PM, |
633 | #ifdef CONFIG_OF_GPIO |
634 | .of_match_table = of_match_ptr(of_gpio_fan_match), |
635 | #endif |
636 | }, |
637 | }; |
638 | |
639 | module_platform_driver(gpio_fan_driver); |
640 | |
641 | MODULE_AUTHOR("Simon Guinot <sguinot@lacie.com>"); |
642 | MODULE_DESCRIPTION("GPIO FAN driver"); |
643 | MODULE_LICENSE("GPL"); |
644 | MODULE_ALIAS("platform:gpio-fan"); |
645 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9