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iwlwifi: make iwl_sta_fill_lq static
[linux-2.6.git] / drivers / macintosh / therm_adt746x.c
blobfc71723cbc485a11d4eb97c7911955a5a6aa7a72
1 /*
2 * Device driver for the i2c thermostat found on the iBook G4, Albook G4
3 *
4 * Copyright (C) 2003, 2004 Colin Leroy, Rasmus Rohde, Benjamin Herrenschmidt
5 *
6 * Documentation from 115254175ADT7467_pra.pdf and 3686221171167ADT7460_b.pdf
7 * http://www.onsemi.com/PowerSolutions/product.do?id=ADT7467
8 * http://www.onsemi.com/PowerSolutions/product.do?id=ADT7460
9 *
10 */
11
12 #include <linux/types.h>
13 #include <linux/module.h>
14 #include <linux/errno.h>
15 #include <linux/kernel.h>
16 #include <linux/delay.h>
17 #include <linux/sched.h>
18 #include <linux/i2c.h>
19 #include <linux/slab.h>
20 #include <linux/init.h>
21 #include <linux/spinlock.h>
22 #include <linux/wait.h>
23 #include <linux/suspend.h>
24 #include <linux/kthread.h>
25 #include <linux/moduleparam.h>
26 #include <linux/freezer.h>
27 #include <linux/of_platform.h>
28
29 #include <asm/prom.h>
30 #include <asm/machdep.h>
31 #include <asm/io.h>
32 #include <asm/sections.h>
33
34 #undef DEBUG
35
36 #define CONFIG_REG 0x40
37 #define MANUAL_MASK 0xe0
38 #define AUTO_MASK 0x20
39 #define INVERT_MASK 0x10
40
41 static u8 TEMP_REG[3] = {0x26, 0x25, 0x27}; /* local, sensor1, sensor2 */
42 static u8 LIMIT_REG[3] = {0x6b, 0x6a, 0x6c}; /* local, sensor1, sensor2 */
43 static u8 MANUAL_MODE[2] = {0x5c, 0x5d};
44 static u8 REM_CONTROL[2] = {0x00, 0x40};
45 static u8 FAN_SPEED[2] = {0x28, 0x2a};
46 static u8 FAN_SPD_SET[2] = {0x30, 0x31};
47
48 static u8 default_limits_local[3] = {70, 50, 70}; /* local, sensor1, sensor2 */
49 static u8 default_limits_chip[3] = {80, 65, 80}; /* local, sensor1, sensor2 */
50 static const char *sensor_location[3];
51
52 static int limit_adjust;
53 static int fan_speed = -1;
54 static bool verbose;
55
56 MODULE_AUTHOR("Colin Leroy <colin@colino.net>");
57 MODULE_DESCRIPTION("Driver for ADT746x thermostat in iBook G4 and "
58 "Powerbook G4 Alu");
59 MODULE_LICENSE("GPL");
60
61 module_param(limit_adjust, int, 0644);
62 MODULE_PARM_DESC(limit_adjust,"Adjust maximum temperatures (50 sensor1, 70 sensor2) "
63 "by N degrees.");
64
65 module_param(fan_speed, int, 0644);
66 MODULE_PARM_DESC(fan_speed,"Specify starting fan speed (0-255) "
67 "(default 64)");
68
69 module_param(verbose, bool, 0);
70 MODULE_PARM_DESC(verbose,"Verbose log operations "
71 "(default 0)");
72
73 struct thermostat {
74 struct i2c_client *clt;
75 u8 temps[3];
76 u8 cached_temp[3];
77 u8 initial_limits[3];
78 u8 limits[3];
79 int last_speed[2];
80 int last_var[2];
81 int pwm_inv[2];
82 };
83
84 static enum {ADT7460, ADT7467} therm_type;
85 static int therm_bus, therm_address;
86 static struct platform_device * of_dev;
87 static struct thermostat* thermostat;
88 static struct task_struct *thread_therm = NULL;
89
90 static void write_both_fan_speed(struct thermostat *th, int speed);
91 static void write_fan_speed(struct thermostat *th, int speed, int fan);
92 static void thermostat_create_files(void);
93 static void thermostat_remove_files(void);
94
95 static int
96 write_reg(struct thermostat* th, int reg, u8 data)
97 {
98 u8 tmp[2];
99 int rc;
100
101 tmp[0] = reg;
102 tmp[1] = data;
103 rc = i2c_master_send(th->clt, (const char *)tmp, 2);
104 if (rc < 0)
105 return rc;
106 if (rc != 2)
107 return -ENODEV;
108 return 0;
109 }
110
111 static int
112 read_reg(struct thermostat* th, int reg)
113 {
114 u8 reg_addr, data;
115 int rc;
116
117 reg_addr = (u8)reg;
118 rc = i2c_master_send(th->clt, &reg_addr, 1);
119 if (rc < 0)
120 return rc;
121 if (rc != 1)
122 return -ENODEV;
123 rc = i2c_master_recv(th->clt, (char *)&data, 1);
124 if (rc < 0)
125 return rc;
126 return data;
127 }
128
129 static struct i2c_driver thermostat_driver;
130
131 static int
132 attach_thermostat(struct i2c_adapter *adapter)
133 {
134 unsigned long bus_no;
135 struct i2c_board_info info;
136 struct i2c_client *client;
137
138 if (strncmp(adapter->name, "uni-n", 5))
139 return -ENODEV;
140 bus_no = simple_strtoul(adapter->name + 6, NULL, 10);
141 if (bus_no != therm_bus)
142 return -ENODEV;
143
144 memset(&info, 0, sizeof(struct i2c_board_info));
145 strlcpy(info.type, "therm_adt746x", I2C_NAME_SIZE);
146 info.addr = therm_address;
147 client = i2c_new_device(adapter, &info);
148 if (!client)
149 return -ENODEV;
150
151 /*
152 * Let i2c-core delete that device on driver removal.
153 * This is safe because i2c-core holds the core_lock mutex for us.
154 */
155 list_add_tail(&client->detected, &thermostat_driver.clients);
156 return 0;
157 }
158
159 static int
160 remove_thermostat(struct i2c_client *client)
161 {
162 struct thermostat *th = i2c_get_clientdata(client);
163 int i;
164
165 thermostat_remove_files();
166
167 if (thread_therm != NULL) {
168 kthread_stop(thread_therm);
169 }
170
171 printk(KERN_INFO "adt746x: Putting max temperatures back from "
172 "%d, %d, %d to %d, %d, %d\n",
173 th->limits[0], th->limits[1], th->limits[2],
174 th->initial_limits[0], th->initial_limits[1],
175 th->initial_limits[2]);
176
177 for (i = 0; i < 3; i++)
178 write_reg(th, LIMIT_REG[i], th->initial_limits[i]);
179
180 write_both_fan_speed(th, -1);
181
182 thermostat = NULL;
183
184 kfree(th);
185
186 return 0;
187 }
188
189 static int read_fan_speed(struct thermostat *th, u8 addr)
190 {
191 u8 tmp[2];
192 u16 res;
193
194 /* should start with low byte */
195 tmp[1] = read_reg(th, addr);
196 tmp[0] = read_reg(th, addr + 1);
197
198 res = tmp[1] + (tmp[0] << 8);
199 /* "a value of 0xffff means that the fan has stopped" */
200 return (res == 0xffff ? 0 : (90000*60)/res);
201 }
202
203 static void write_both_fan_speed(struct thermostat *th, int speed)
204 {
205 write_fan_speed(th, speed, 0);
206 if (therm_type == ADT7460)
207 write_fan_speed(th, speed, 1);
208 }
209
210 static void write_fan_speed(struct thermostat *th, int speed, int fan)
211 {
212 u8 manual;
213
214 if (speed > 0xff)
215 speed = 0xff;
216 else if (speed < -1)
217 speed = 0;
218
219 if (therm_type == ADT7467 && fan == 1)
220 return;
221
222 if (th->last_speed[fan] != speed) {
223 if (verbose) {
224 if (speed == -1)
225 printk(KERN_DEBUG "adt746x: Setting speed to automatic "
226 "for %s fan.\n", sensor_location[fan+1]);
227 else
228 printk(KERN_DEBUG "adt746x: Setting speed to %d "
229 "for %s fan.\n", speed, sensor_location[fan+1]);
230 }
231 } else
232 return;
233
234 if (speed >= 0) {
235 manual = read_reg(th, MANUAL_MODE[fan]);
236 manual &= ~INVERT_MASK;
237 write_reg(th, MANUAL_MODE[fan],
238 manual | MANUAL_MASK | th->pwm_inv[fan]);
239 write_reg(th, FAN_SPD_SET[fan], speed);
240 } else {
241 /* back to automatic */
242 if(therm_type == ADT7460) {
243 manual = read_reg(th,
244 MANUAL_MODE[fan]) & (~MANUAL_MASK);
245 manual &= ~INVERT_MASK;
246 manual |= th->pwm_inv[fan];
247 write_reg(th,
248 MANUAL_MODE[fan], manual|REM_CONTROL[fan]);
249 } else {
250 manual = read_reg(th, MANUAL_MODE[fan]);
251 manual &= ~INVERT_MASK;
252 manual |= th->pwm_inv[fan];
253 write_reg(th, MANUAL_MODE[fan], manual&(~AUTO_MASK));
254 }
255 }
256
257 th->last_speed[fan] = speed;
258 }
259
260 static void read_sensors(struct thermostat *th)
261 {
262 int i = 0;
263
264 for (i = 0; i < 3; i++)
265 th->temps[i] = read_reg(th, TEMP_REG[i]);
266 }
267
268 #ifdef DEBUG
269 static void display_stats(struct thermostat *th)
270 {
271 if (th->temps[0] != th->cached_temp[0]
272 || th->temps[1] != th->cached_temp[1]
273 || th->temps[2] != th->cached_temp[2]) {
274 printk(KERN_INFO "adt746x: Temperature infos:"
275 " thermostats: %d,%d,%d;"
276 " limits: %d,%d,%d;"
277 " fan speed: %d RPM\n",
278 th->temps[0], th->temps[1], th->temps[2],
279 th->limits[0], th->limits[1], th->limits[2],
280 read_fan_speed(th, FAN_SPEED[0]));
281 }
282 th->cached_temp[0] = th->temps[0];
283 th->cached_temp[1] = th->temps[1];
284 th->cached_temp[2] = th->temps[2];
285 }
286 #endif
287
288 static void update_fans_speed (struct thermostat *th)
289 {
290 int lastvar = 0; /* last variation, for iBook */
291 int i = 0;
292
293 /* we don't care about local sensor, so we start at sensor 1 */
294 for (i = 1; i < 3; i++) {
295 int started = 0;
296 int fan_number = (therm_type == ADT7460 && i == 2);
297 int var = th->temps[i] - th->limits[i];
298
299 if (var > -1) {
300 int step = (255 - fan_speed) / 7;
301 int new_speed = 0;
302
303 /* hysteresis : change fan speed only if variation is
304 * more than two degrees */
305 if (abs(var - th->last_var[fan_number]) < 2)
306 continue;
307
308 started = 1;
309 new_speed = fan_speed + ((var-1)*step);
310
311 if (new_speed < fan_speed)
312 new_speed = fan_speed;
313 if (new_speed > 255)
314 new_speed = 255;
315
316 if (verbose)
317 printk(KERN_DEBUG "adt746x: Setting fans speed to %d "
318 "(limit exceeded by %d on %s)\n",
319 new_speed, var,
320 sensor_location[fan_number+1]);
321 write_both_fan_speed(th, new_speed);
322 th->last_var[fan_number] = var;
323 } else if (var < -2) {
324 /* don't stop fan if sensor2 is cold and sensor1 is not
325 * so cold (lastvar >= -1) */
326 if (i == 2 && lastvar < -1) {
327 if (th->last_speed[fan_number] != 0)
328 if (verbose)
329 printk(KERN_DEBUG "adt746x: Stopping "
330 "fans.\n");
331 write_both_fan_speed(th, 0);
332 }
333 }
334
335 lastvar = var;
336
337 if (started)
338 return; /* we don't want to re-stop the fan
339 * if sensor1 is heating and sensor2 is not */
340 }
341 }
342
343 static int monitor_task(void *arg)
344 {
345 struct thermostat* th = arg;
346
347 set_freezable();
348 while(!kthread_should_stop()) {
349 try_to_freeze();
350 msleep_interruptible(2000);
351
352 #ifndef DEBUG
353 if (fan_speed != -1)
354 read_sensors(th);
355 #else
356 read_sensors(th);
357 #endif
358
359 if (fan_speed != -1)
360 update_fans_speed(th);
361
362 #ifdef DEBUG
363 display_stats(th);
364 #endif
365
366 }
367
368 return 0;
369 }
370
371 static void set_limit(struct thermostat *th, int i)
372 {
373 /* Set sensor1 limit higher to avoid powerdowns */
374 th->limits[i] = default_limits_chip[i] + limit_adjust;
375 write_reg(th, LIMIT_REG[i], th->limits[i]);
376
377 /* set our limits to normal */
378 th->limits[i] = default_limits_local[i] + limit_adjust;
379 }
380
381 static int probe_thermostat(struct i2c_client *client,
382 const struct i2c_device_id *id)
383 {
384 struct thermostat* th;
385 int rc;
386 int i;
387
388 if (thermostat)
389 return 0;
390
391 th = kzalloc(sizeof(struct thermostat), GFP_KERNEL);
392 if (!th)
393 return -ENOMEM;
394
395 i2c_set_clientdata(client, th);
396 th->clt = client;
397
398 rc = read_reg(th, CONFIG_REG);
399 if (rc < 0) {
400 dev_err(&client->dev, "Thermostat failed to read config!\n");
401 kfree(th);
402 return -ENODEV;
403 }
404
405 /* force manual control to start the fan quieter */
406 if (fan_speed == -1)
407 fan_speed = 64;
408
409 if(therm_type == ADT7460) {
410 printk(KERN_INFO "adt746x: ADT7460 initializing\n");
411 /* The 7460 needs to be started explicitly */
412 write_reg(th, CONFIG_REG, 1);
413 } else
414 printk(KERN_INFO "adt746x: ADT7467 initializing\n");
415
416 for (i = 0; i < 3; i++) {
417 th->initial_limits[i] = read_reg(th, LIMIT_REG[i]);
418 set_limit(th, i);
419 }
420
421 printk(KERN_INFO "adt746x: Lowering max temperatures from %d, %d, %d"
422 " to %d, %d, %d\n",
423 th->initial_limits[0], th->initial_limits[1],
424 th->initial_limits[2], th->limits[0], th->limits[1],
425 th->limits[2]);
426
427 thermostat = th;
428
429 /* record invert bit status because fw can corrupt it after suspend */
430 th->pwm_inv[0] = read_reg(th, MANUAL_MODE[0]) & INVERT_MASK;
431 th->pwm_inv[1] = read_reg(th, MANUAL_MODE[1]) & INVERT_MASK;
432
433 /* be sure to really write fan speed the first time */
434 th->last_speed[0] = -2;
435 th->last_speed[1] = -2;
436 th->last_var[0] = -80;
437 th->last_var[1] = -80;
438
439 if (fan_speed != -1) {
440 /* manual mode, stop fans */
441 write_both_fan_speed(th, 0);
442 } else {
443 /* automatic mode */
444 write_both_fan_speed(th, -1);
445 }
446
447 thread_therm = kthread_run(monitor_task, th, "kfand");
448
449 if (thread_therm == ERR_PTR(-ENOMEM)) {
450 printk(KERN_INFO "adt746x: Kthread creation failed\n");
451 thread_therm = NULL;
452 return -ENOMEM;
453 }
454
455 thermostat_create_files();
456
457 return 0;
458 }
459
460 static const struct i2c_device_id therm_adt746x_id[] = {
461 { "therm_adt746x", 0 },
462 { }
463 };
464
465 static struct i2c_driver thermostat_driver = {
466 .driver = {
467 .name = "therm_adt746x",
468 },
469 .attach_adapter = attach_thermostat,
470 .probe = probe_thermostat,
471 .remove = remove_thermostat,
472 .id_table = therm_adt746x_id,
473 };
474
475 /*
476 * Now, unfortunately, sysfs doesn't give us a nice void * we could
477 * pass around to the attribute functions, so we don't really have
478 * choice but implement a bunch of them...
479 *
480 * FIXME, it does now...
481 */
482 #define BUILD_SHOW_FUNC_INT(name, data) \
483 static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
484 { \
485 return sprintf(buf, "%d\n", data); \
486 }
487
488 #define BUILD_SHOW_FUNC_STR(name, data) \
489 static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
490 { \
491 return sprintf(buf, "%s\n", data); \
492 }
493
494 #define BUILD_SHOW_FUNC_FAN(name, data) \
495 static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
496 { \
497 return sprintf(buf, "%d (%d rpm)\n", \
498 thermostat->last_speed[data], \
499 read_fan_speed(thermostat, FAN_SPEED[data]) \
500 ); \
501 }
502
503 #define BUILD_STORE_FUNC_DEG(name, data) \
504 static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \
505 { \
506 int val; \
507 int i; \
508 val = simple_strtol(buf, NULL, 10); \
509 printk(KERN_INFO "Adjusting limits by %d degrees\n", val); \
510 limit_adjust = val; \
511 for (i=0; i < 3; i++) \
512 set_limit(thermostat, i); \
513 return n; \
514 }
515
516 #define BUILD_STORE_FUNC_INT(name, data) \
517 static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \
518 { \
519 int val; \
520 val = simple_strtol(buf, NULL, 10); \
521 if (val < 0 || val > 255) \
522 return -EINVAL; \
523 printk(KERN_INFO "Setting specified fan speed to %d\n", val); \
524 data = val; \
525 return n; \
526 }
527
528 BUILD_SHOW_FUNC_INT(sensor1_temperature, (read_reg(thermostat, TEMP_REG[1])))
529 BUILD_SHOW_FUNC_INT(sensor2_temperature, (read_reg(thermostat, TEMP_REG[2])))
530 BUILD_SHOW_FUNC_INT(sensor1_limit, thermostat->limits[1])
531 BUILD_SHOW_FUNC_INT(sensor2_limit, thermostat->limits[2])
532 BUILD_SHOW_FUNC_STR(sensor1_location, sensor_location[1])
533 BUILD_SHOW_FUNC_STR(sensor2_location, sensor_location[2])
534
535 BUILD_SHOW_FUNC_INT(specified_fan_speed, fan_speed)
536 BUILD_SHOW_FUNC_FAN(sensor1_fan_speed, 0)
537 BUILD_SHOW_FUNC_FAN(sensor2_fan_speed, 1)
538
539 BUILD_STORE_FUNC_INT(specified_fan_speed,fan_speed)
540 BUILD_SHOW_FUNC_INT(limit_adjust, limit_adjust)
541 BUILD_STORE_FUNC_DEG(limit_adjust, thermostat)
542
543 static DEVICE_ATTR(sensor1_temperature, S_IRUGO,
544 show_sensor1_temperature,NULL);
545 static DEVICE_ATTR(sensor2_temperature, S_IRUGO,
546 show_sensor2_temperature,NULL);
547 static DEVICE_ATTR(sensor1_limit, S_IRUGO,
548 show_sensor1_limit, NULL);
549 static DEVICE_ATTR(sensor2_limit, S_IRUGO,
550 show_sensor2_limit, NULL);
551 static DEVICE_ATTR(sensor1_location, S_IRUGO,
552 show_sensor1_location, NULL);
553 static DEVICE_ATTR(sensor2_location, S_IRUGO,
554 show_sensor2_location, NULL);
555
556 static DEVICE_ATTR(specified_fan_speed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH,
557 show_specified_fan_speed,store_specified_fan_speed);
558
559 static DEVICE_ATTR(sensor1_fan_speed, S_IRUGO,
560 show_sensor1_fan_speed, NULL);
561 static DEVICE_ATTR(sensor2_fan_speed, S_IRUGO,
562 show_sensor2_fan_speed, NULL);
563
564 static DEVICE_ATTR(limit_adjust, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH,
565 show_limit_adjust, store_limit_adjust);
566
567
568 static int __init
569 thermostat_init(void)
570 {
571 struct device_node* np;
572 const u32 *prop;
573 int i = 0, offset = 0;
574
575 np = of_find_node_by_name(NULL, "fan");
576 if (!np)
577 return -ENODEV;
578 if (of_device_is_compatible(np, "adt7460"))
579 therm_type = ADT7460;
580 else if (of_device_is_compatible(np, "adt7467"))
581 therm_type = ADT7467;
582 else {
583 of_node_put(np);
584 return -ENODEV;
585 }
586
587 prop = of_get_property(np, "hwsensor-params-version", NULL);
588 printk(KERN_INFO "adt746x: version %d (%ssupported)\n", *prop,
589 (*prop == 1)?"":"un");
590 if (*prop != 1) {
591 of_node_put(np);
592 return -ENODEV;
593 }
594
595 prop = of_get_property(np, "reg", NULL);
596 if (!prop) {
597 of_node_put(np);
598 return -ENODEV;
599 }
600
601 /* look for bus either by path or using "reg" */
602 if (strstr(np->full_name, "/i2c-bus@") != NULL) {
603 const char *tmp_bus = (strstr(np->full_name, "/i2c-bus@") + 9);
604 therm_bus = tmp_bus[0]-'0';
605 } else {
606 therm_bus = ((*prop) >> 8) & 0x0f;
607 }
608
609 therm_address = ((*prop) & 0xff) >> 1;
610
611 printk(KERN_INFO "adt746x: Thermostat bus: %d, address: 0x%02x, "
612 "limit_adjust: %d, fan_speed: %d\n",
613 therm_bus, therm_address, limit_adjust, fan_speed);
614
615 if (of_get_property(np, "hwsensor-location", NULL)) {
616 for (i = 0; i < 3; i++) {
617 sensor_location[i] = of_get_property(np,
618 "hwsensor-location", NULL) + offset;
619
620 if (sensor_location[i] == NULL)
621 sensor_location[i] = "";
622
623 printk(KERN_INFO "sensor %d: %s\n", i, sensor_location[i]);
624 offset += strlen(sensor_location[i]) + 1;
625 }
626 } else {
627 sensor_location[0] = "?";
628 sensor_location[1] = "?";
629 sensor_location[2] = "?";
630 }
631
632 of_dev = of_platform_device_create(np, "temperatures", NULL);
633 of_node_put(np);
634
635 if (of_dev == NULL) {
636 printk(KERN_ERR "Can't register temperatures device !\n");
637 return -ENODEV;
638 }
639
640 #ifndef CONFIG_I2C_POWERMAC
641 request_module("i2c-powermac");
642 #endif
643
644 return i2c_add_driver(&thermostat_driver);
645 }
646
647 static void thermostat_create_files(void)
648 {
649 int err;
650
651 err = device_create_file(&of_dev->dev, &dev_attr_sensor1_temperature);
652 err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_temperature);
653 err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_limit);
654 err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_limit);
655 err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_location);
656 err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_location);
657 err |= device_create_file(&of_dev->dev, &dev_attr_limit_adjust);
658 err |= device_create_file(&of_dev->dev, &dev_attr_specified_fan_speed);
659 err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_fan_speed);
660 if(therm_type == ADT7460)
661 err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_fan_speed);
662 if (err)
663 printk(KERN_WARNING
664 "Failed to create temperature attribute file(s).\n");
665 }
666
667 static void thermostat_remove_files(void)
668 {
669 if (of_dev) {
670 device_remove_file(&of_dev->dev, &dev_attr_sensor1_temperature);
671 device_remove_file(&of_dev->dev, &dev_attr_sensor2_temperature);
672 device_remove_file(&of_dev->dev, &dev_attr_sensor1_limit);
673 device_remove_file(&of_dev->dev, &dev_attr_sensor2_limit);
674 device_remove_file(&of_dev->dev, &dev_attr_sensor1_location);
675 device_remove_file(&of_dev->dev, &dev_attr_sensor2_location);
676 device_remove_file(&of_dev->dev, &dev_attr_limit_adjust);
677 device_remove_file(&of_dev->dev, &dev_attr_specified_fan_speed);
678 device_remove_file(&of_dev->dev, &dev_attr_sensor1_fan_speed);
679
680 if(therm_type == ADT7460)
681 device_remove_file(&of_dev->dev,
682 &dev_attr_sensor2_fan_speed);
683
684 }
685 }
686
687 static void __exit
688 thermostat_exit(void)
689 {
690 i2c_del_driver(&thermostat_driver);
691 of_device_unregister(of_dev);
692 }
693
694 module_init(thermostat_init);
695 module_exit(thermostat_exit);
Linus' kernel tree