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netns xfrm: deal with dst entries in netns
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / macintosh / therm_adt746x.c
blob5ff47ba7f2d052e639f733c6f8cddea3e18b9175
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
7 * http://www.analog.com/UploadedFiles/Data_Sheets/115254175ADT7467_pra.pdf
8 * http://www.analog.com/UploadedFiles/Data_Sheets/3686221171167ADT7460_b.pdf
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/system.h>
33 #include <asm/sections.h>
34
35 #undef DEBUG
36
37 #define CONFIG_REG 0x40
38 #define MANUAL_MASK 0xe0
39 #define AUTO_MASK 0x20
40 #define INVERT_MASK 0x10
41
42 static u8 TEMP_REG[3] = {0x26, 0x25, 0x27}; /* local, sensor1, sensor2 */
43 static u8 LIMIT_REG[3] = {0x6b, 0x6a, 0x6c}; /* local, sensor1, sensor2 */
44 static u8 MANUAL_MODE[2] = {0x5c, 0x5d};
45 static u8 REM_CONTROL[2] = {0x00, 0x40};
46 static u8 FAN_SPEED[2] = {0x28, 0x2a};
47 static u8 FAN_SPD_SET[2] = {0x30, 0x31};
48
49 static u8 default_limits_local[3] = {70, 50, 70}; /* local, sensor1, sensor2 */
50 static u8 default_limits_chip[3] = {80, 65, 80}; /* local, sensor1, sensor2 */
51 static const char *sensor_location[3];
52
53 static int limit_adjust;
54 static int fan_speed = -1;
55 static int verbose;
56
57 MODULE_AUTHOR("Colin Leroy <colin@colino.net>");
58 MODULE_DESCRIPTION("Driver for ADT746x thermostat in iBook G4 and "
59 "Powerbook G4 Alu");
60 MODULE_LICENSE("GPL");
61
62 module_param(limit_adjust, int, 0644);
63 MODULE_PARM_DESC(limit_adjust,"Adjust maximum temperatures (50 sensor1, 70 sensor2) "
64 "by N degrees.");
65
66 module_param(fan_speed, int, 0644);
67 MODULE_PARM_DESC(fan_speed,"Specify starting fan speed (0-255) "
68 "(default 64)");
69
70 module_param(verbose, bool, 0);
71 MODULE_PARM_DESC(verbose,"Verbose log operations "
72 "(default 0)");
73
74 struct thermostat {
75 struct i2c_client *clt;
76 u8 temps[3];
77 u8 cached_temp[3];
78 u8 initial_limits[3];
79 u8 limits[3];
80 int last_speed[2];
81 int last_var[2];
82 int pwm_inv[2];
83 };
84
85 static enum {ADT7460, ADT7467} therm_type;
86 static int therm_bus, therm_address;
87 static struct of_device * of_dev;
88 static struct thermostat* thermostat;
89 static struct task_struct *thread_therm = NULL;
90
91 static void write_both_fan_speed(struct thermostat *th, int speed);
92 static void write_fan_speed(struct thermostat *th, int speed, int fan);
93
94 static int
95 write_reg(struct thermostat* th, int reg, u8 data)
96 {
97 u8 tmp[2];
98 int rc;
99
100 tmp[0] = reg;
101 tmp[1] = data;
102 rc = i2c_master_send(th->clt, (const char *)tmp, 2);
103 if (rc < 0)
104 return rc;
105 if (rc != 2)
106 return -ENODEV;
107 return 0;
108 }
109
110 static int
111 read_reg(struct thermostat* th, int reg)
112 {
113 u8 reg_addr, data;
114 int rc;
115
116 reg_addr = (u8)reg;
117 rc = i2c_master_send(th->clt, &reg_addr, 1);
118 if (rc < 0)
119 return rc;
120 if (rc != 1)
121 return -ENODEV;
122 rc = i2c_master_recv(th->clt, (char *)&data, 1);
123 if (rc < 0)
124 return rc;
125 return data;
126 }
127
128 static struct i2c_driver thermostat_driver;
129
130 static int
131 attach_thermostat(struct i2c_adapter *adapter)
132 {
133 unsigned long bus_no;
134 struct i2c_board_info info;
135 struct i2c_client *client;
136
137 if (strncmp(adapter->name, "uni-n", 5))
138 return -ENODEV;
139 bus_no = simple_strtoul(adapter->name + 6, NULL, 10);
140 if (bus_no != therm_bus)
141 return -ENODEV;
142
143 memset(&info, 0, sizeof(struct i2c_board_info));
144 strlcpy(info.type, "therm_adt746x", I2C_NAME_SIZE);
145 info.addr = therm_address;
146 client = i2c_new_device(adapter, &info);
147 if (!client)
148 return -ENODEV;
149
150 /*
151 * Let i2c-core delete that device on driver removal.
152 * This is safe because i2c-core holds the core_lock mutex for us.
153 */
154 list_add_tail(&client->detected, &thermostat_driver.clients);
155 return 0;
156 }
157
158 static int
159 remove_thermostat(struct i2c_client *client)
160 {
161 struct thermostat *th = i2c_get_clientdata(client);
162 int i;
163
164 if (thread_therm != NULL) {
165 kthread_stop(thread_therm);
166 }
167
168 printk(KERN_INFO "adt746x: Putting max temperatures back from "
169 "%d, %d, %d to %d, %d, %d\n",
170 th->limits[0], th->limits[1], th->limits[2],
171 th->initial_limits[0], th->initial_limits[1],
172 th->initial_limits[2]);
173
174 for (i = 0; i < 3; i++)
175 write_reg(th, LIMIT_REG[i], th->initial_limits[i]);
176
177 write_both_fan_speed(th, -1);
178
179 thermostat = NULL;
180
181 kfree(th);
182
183 return 0;
184 }
185
186 static int read_fan_speed(struct thermostat *th, u8 addr)
187 {
188 u8 tmp[2];
189 u16 res;
190
191 /* should start with low byte */
192 tmp[1] = read_reg(th, addr);
193 tmp[0] = read_reg(th, addr + 1);
194
195 res = tmp[1] + (tmp[0] << 8);
196 /* "a value of 0xffff means that the fan has stopped" */
197 return (res == 0xffff ? 0 : (90000*60)/res);
198 }
199
200 static void write_both_fan_speed(struct thermostat *th, int speed)
201 {
202 write_fan_speed(th, speed, 0);
203 if (therm_type == ADT7460)
204 write_fan_speed(th, speed, 1);
205 }
206
207 static void write_fan_speed(struct thermostat *th, int speed, int fan)
208 {
209 u8 manual;
210
211 if (speed > 0xff)
212 speed = 0xff;
213 else if (speed < -1)
214 speed = 0;
215
216 if (therm_type == ADT7467 && fan == 1)
217 return;
218
219 if (th->last_speed[fan] != speed) {
220 if (verbose) {
221 if (speed == -1)
222 printk(KERN_DEBUG "adt746x: Setting speed to automatic "
223 "for %s fan.\n", sensor_location[fan+1]);
224 else
225 printk(KERN_DEBUG "adt746x: Setting speed to %d "
226 "for %s fan.\n", speed, sensor_location[fan+1]);
227 }
228 } else
229 return;
230
231 if (speed >= 0) {
232 manual = read_reg(th, MANUAL_MODE[fan]);
233 manual &= ~INVERT_MASK;
234 write_reg(th, MANUAL_MODE[fan],
235 manual | MANUAL_MASK | th->pwm_inv[fan]);
236 write_reg(th, FAN_SPD_SET[fan], speed);
237 } else {
238 /* back to automatic */
239 if(therm_type == ADT7460) {
240 manual = read_reg(th,
241 MANUAL_MODE[fan]) & (~MANUAL_MASK);
242 manual &= ~INVERT_MASK;
243 manual |= th->pwm_inv[fan];
244 write_reg(th,
245 MANUAL_MODE[fan], manual|REM_CONTROL[fan]);
246 } else {
247 manual = read_reg(th, MANUAL_MODE[fan]);
248 manual &= ~INVERT_MASK;
249 manual |= th->pwm_inv[fan];
250 write_reg(th, MANUAL_MODE[fan], manual&(~AUTO_MASK));
251 }
252 }
253
254 th->last_speed[fan] = speed;
255 }
256
257 static void read_sensors(struct thermostat *th)
258 {
259 int i = 0;
260
261 for (i = 0; i < 3; i++)
262 th->temps[i] = read_reg(th, TEMP_REG[i]);
263 }
264
265 #ifdef DEBUG
266 static void display_stats(struct thermostat *th)
267 {
268 if (th->temps[0] != th->cached_temp[0]
269 || th->temps[1] != th->cached_temp[1]
270 || th->temps[2] != th->cached_temp[2]) {
271 printk(KERN_INFO "adt746x: Temperature infos:"
272 " thermostats: %d,%d,%d;"
273 " limits: %d,%d,%d;"
274 " fan speed: %d RPM\n",
275 th->temps[0], th->temps[1], th->temps[2],
276 th->limits[0], th->limits[1], th->limits[2],
277 read_fan_speed(th, FAN_SPEED[0]));
278 }
279 th->cached_temp[0] = th->temps[0];
280 th->cached_temp[1] = th->temps[1];
281 th->cached_temp[2] = th->temps[2];
282 }
283 #endif
284
285 static void update_fans_speed (struct thermostat *th)
286 {
287 int lastvar = 0; /* last variation, for iBook */
288 int i = 0;
289
290 /* we don't care about local sensor, so we start at sensor 1 */
291 for (i = 1; i < 3; i++) {
292 int started = 0;
293 int fan_number = (therm_type == ADT7460 && i == 2);
294 int var = th->temps[i] - th->limits[i];
295
296 if (var > -1) {
297 int step = (255 - fan_speed) / 7;
298 int new_speed = 0;
299
300 /* hysteresis : change fan speed only if variation is
301 * more than two degrees */
302 if (abs(var - th->last_var[fan_number]) < 2)
303 continue;
304
305 started = 1;
306 new_speed = fan_speed + ((var-1)*step);
307
308 if (new_speed < fan_speed)
309 new_speed = fan_speed;
310 if (new_speed > 255)
311 new_speed = 255;
312
313 if (verbose)
314 printk(KERN_DEBUG "adt746x: Setting fans speed to %d "
315 "(limit exceeded by %d on %s) \n",
316 new_speed, var,
317 sensor_location[fan_number+1]);
318 write_both_fan_speed(th, new_speed);
319 th->last_var[fan_number] = var;
320 } else if (var < -2) {
321 /* don't stop fan if sensor2 is cold and sensor1 is not
322 * so cold (lastvar >= -1) */
323 if (i == 2 && lastvar < -1) {
324 if (th->last_speed[fan_number] != 0)
325 if (verbose)
326 printk(KERN_DEBUG "adt746x: Stopping "
327 "fans.\n");
328 write_both_fan_speed(th, 0);
329 }
330 }
331
332 lastvar = var;
333
334 if (started)
335 return; /* we don't want to re-stop the fan
336 * if sensor1 is heating and sensor2 is not */
337 }
338 }
339
340 static int monitor_task(void *arg)
341 {
342 struct thermostat* th = arg;
343
344 set_freezable();
345 while(!kthread_should_stop()) {
346 try_to_freeze();
347 msleep_interruptible(2000);
348
349 #ifndef DEBUG
350 if (fan_speed != -1)
351 read_sensors(th);
352 #else
353 read_sensors(th);
354 #endif
355
356 if (fan_speed != -1)
357 update_fans_speed(th);
358
359 #ifdef DEBUG
360 display_stats(th);
361 #endif
362
363 }
364
365 return 0;
366 }
367
368 static void set_limit(struct thermostat *th, int i)
369 {
370 /* Set sensor1 limit higher to avoid powerdowns */
371 th->limits[i] = default_limits_chip[i] + limit_adjust;
372 write_reg(th, LIMIT_REG[i], th->limits[i]);
373
374 /* set our limits to normal */
375 th->limits[i] = default_limits_local[i] + limit_adjust;
376 }
377
378 static int probe_thermostat(struct i2c_client *client,
379 const struct i2c_device_id *id)
380 {
381 struct thermostat* th;
382 int rc;
383 int i;
384
385 if (thermostat)
386 return 0;
387
388 th = kzalloc(sizeof(struct thermostat), GFP_KERNEL);
389 if (!th)
390 return -ENOMEM;
391
392 i2c_set_clientdata(client, th);
393 th->clt = client;
394
395 rc = read_reg(th, CONFIG_REG);
396 if (rc < 0) {
397 dev_err(&client->dev, "Thermostat failed to read config!\n");
398 kfree(th);
399 return -ENODEV;
400 }
401
402 /* force manual control to start the fan quieter */
403 if (fan_speed == -1)
404 fan_speed = 64;
405
406 if(therm_type == ADT7460) {
407 printk(KERN_INFO "adt746x: ADT7460 initializing\n");
408 /* The 7460 needs to be started explicitly */
409 write_reg(th, CONFIG_REG, 1);
410 } else
411 printk(KERN_INFO "adt746x: ADT7467 initializing\n");
412
413 for (i = 0; i < 3; i++) {
414 th->initial_limits[i] = read_reg(th, LIMIT_REG[i]);
415 set_limit(th, i);
416 }
417
418 printk(KERN_INFO "adt746x: Lowering max temperatures from %d, %d, %d"
419 " to %d, %d, %d\n",
420 th->initial_limits[0], th->initial_limits[1],
421 th->initial_limits[2], th->limits[0], th->limits[1],
422 th->limits[2]);
423
424 thermostat = th;
425
426 /* record invert bit status because fw can corrupt it after suspend */
427 th->pwm_inv[0] = read_reg(th, MANUAL_MODE[0]) & INVERT_MASK;
428 th->pwm_inv[1] = read_reg(th, MANUAL_MODE[1]) & INVERT_MASK;
429
430 /* be sure to really write fan speed the first time */
431 th->last_speed[0] = -2;
432 th->last_speed[1] = -2;
433 th->last_var[0] = -80;
434 th->last_var[1] = -80;
435
436 if (fan_speed != -1) {
437 /* manual mode, stop fans */
438 write_both_fan_speed(th, 0);
439 } else {
440 /* automatic mode */
441 write_both_fan_speed(th, -1);
442 }
443
444 thread_therm = kthread_run(monitor_task, th, "kfand");
445
446 if (thread_therm == ERR_PTR(-ENOMEM)) {
447 printk(KERN_INFO "adt746x: Kthread creation failed\n");
448 thread_therm = NULL;
449 return -ENOMEM;
450 }
451
452 return 0;
453 }
454
455 static const struct i2c_device_id therm_adt746x_id[] = {
456 { "therm_adt746x", 0 },
457 { }
458 };
459
460 static struct i2c_driver thermostat_driver = {
461 .driver = {
462 .name = "therm_adt746x",
463 },
464 .attach_adapter = attach_thermostat,
465 .probe = probe_thermostat,
466 .remove = remove_thermostat,
467 .id_table = therm_adt746x_id,
468 };
469
470 /*
471 * Now, unfortunately, sysfs doesn't give us a nice void * we could
472 * pass around to the attribute functions, so we don't really have
473 * choice but implement a bunch of them...
474 *
475 * FIXME, it does now...
476 */
477 #define BUILD_SHOW_FUNC_INT(name, data) \
478 static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
479 { \
480 return sprintf(buf, "%d\n", data); \
481 }
482
483 #define BUILD_SHOW_FUNC_STR(name, data) \
484 static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
485 { \
486 return sprintf(buf, "%s\n", data); \
487 }
488
489 #define BUILD_SHOW_FUNC_FAN(name, data) \
490 static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
491 { \
492 return sprintf(buf, "%d (%d rpm)\n", \
493 thermostat->last_speed[data], \
494 read_fan_speed(thermostat, FAN_SPEED[data]) \
495 ); \
496 }
497
498 #define BUILD_STORE_FUNC_DEG(name, data) \
499 static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \
500 { \
501 int val; \
502 int i; \
503 val = simple_strtol(buf, NULL, 10); \
504 printk(KERN_INFO "Adjusting limits by %d degrees\n", val); \
505 limit_adjust = val; \
506 for (i=0; i < 3; i++) \
507 set_limit(thermostat, i); \
508 return n; \
509 }
510
511 #define BUILD_STORE_FUNC_INT(name, data) \
512 static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \
513 { \
514 int val; \
515 val = simple_strtol(buf, NULL, 10); \
516 if (val < 0 || val > 255) \
517 return -EINVAL; \
518 printk(KERN_INFO "Setting specified fan speed to %d\n", val); \
519 data = val; \
520 return n; \
521 }
522
523 BUILD_SHOW_FUNC_INT(sensor1_temperature, (read_reg(thermostat, TEMP_REG[1])))
524 BUILD_SHOW_FUNC_INT(sensor2_temperature, (read_reg(thermostat, TEMP_REG[2])))
525 BUILD_SHOW_FUNC_INT(sensor1_limit, thermostat->limits[1])
526 BUILD_SHOW_FUNC_INT(sensor2_limit, thermostat->limits[2])
527 BUILD_SHOW_FUNC_STR(sensor1_location, sensor_location[1])
528 BUILD_SHOW_FUNC_STR(sensor2_location, sensor_location[2])
529
530 BUILD_SHOW_FUNC_INT(specified_fan_speed, fan_speed)
531 BUILD_SHOW_FUNC_FAN(sensor1_fan_speed, 0)
532 BUILD_SHOW_FUNC_FAN(sensor2_fan_speed, 1)
533
534 BUILD_STORE_FUNC_INT(specified_fan_speed,fan_speed)
535 BUILD_SHOW_FUNC_INT(limit_adjust, limit_adjust)
536 BUILD_STORE_FUNC_DEG(limit_adjust, thermostat)
537
538 static DEVICE_ATTR(sensor1_temperature, S_IRUGO,
539 show_sensor1_temperature,NULL);
540 static DEVICE_ATTR(sensor2_temperature, S_IRUGO,
541 show_sensor2_temperature,NULL);
542 static DEVICE_ATTR(sensor1_limit, S_IRUGO,
543 show_sensor1_limit, NULL);
544 static DEVICE_ATTR(sensor2_limit, S_IRUGO,
545 show_sensor2_limit, NULL);
546 static DEVICE_ATTR(sensor1_location, S_IRUGO,
547 show_sensor1_location, NULL);
548 static DEVICE_ATTR(sensor2_location, S_IRUGO,
549 show_sensor2_location, NULL);
550
551 static DEVICE_ATTR(specified_fan_speed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH,
552 show_specified_fan_speed,store_specified_fan_speed);
553
554 static DEVICE_ATTR(sensor1_fan_speed, S_IRUGO,
555 show_sensor1_fan_speed, NULL);
556 static DEVICE_ATTR(sensor2_fan_speed, S_IRUGO,
557 show_sensor2_fan_speed, NULL);
558
559 static DEVICE_ATTR(limit_adjust, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH,
560 show_limit_adjust, store_limit_adjust);
561
562
563 static int __init
564 thermostat_init(void)
565 {
566 struct device_node* np;
567 const u32 *prop;
568 int i = 0, offset = 0;
569 int err;
570
571 np = of_find_node_by_name(NULL, "fan");
572 if (!np)
573 return -ENODEV;
574 if (of_device_is_compatible(np, "adt7460"))
575 therm_type = ADT7460;
576 else if (of_device_is_compatible(np, "adt7467"))
577 therm_type = ADT7467;
578 else {
579 of_node_put(np);
580 return -ENODEV;
581 }
582
583 prop = of_get_property(np, "hwsensor-params-version", NULL);
584 printk(KERN_INFO "adt746x: version %d (%ssupported)\n", *prop,
585 (*prop == 1)?"":"un");
586 if (*prop != 1) {
587 of_node_put(np);
588 return -ENODEV;
589 }
590
591 prop = of_get_property(np, "reg", NULL);
592 if (!prop) {
593 of_node_put(np);
594 return -ENODEV;
595 }
596
597 /* look for bus either by path or using "reg" */
598 if (strstr(np->full_name, "/i2c-bus@") != NULL) {
599 const char *tmp_bus = (strstr(np->full_name, "/i2c-bus@") + 9);
600 therm_bus = tmp_bus[0]-'0';
601 } else {
602 therm_bus = ((*prop) >> 8) & 0x0f;
603 }
604
605 therm_address = ((*prop) & 0xff) >> 1;
606
607 printk(KERN_INFO "adt746x: Thermostat bus: %d, address: 0x%02x, "
608 "limit_adjust: %d, fan_speed: %d\n",
609 therm_bus, therm_address, limit_adjust, fan_speed);
610
611 if (of_get_property(np, "hwsensor-location", NULL)) {
612 for (i = 0; i < 3; i++) {
613 sensor_location[i] = of_get_property(np,
614 "hwsensor-location", NULL) + offset;
615
616 if (sensor_location[i] == NULL)
617 sensor_location[i] = "";
618
619 printk(KERN_INFO "sensor %d: %s\n", i, sensor_location[i]);
620 offset += strlen(sensor_location[i]) + 1;
621 }
622 } else {
623 sensor_location[0] = "?";
624 sensor_location[1] = "?";
625 sensor_location[2] = "?";
626 }
627
628 of_dev = of_platform_device_create(np, "temperatures", NULL);
629 of_node_put(np);
630
631 if (of_dev == NULL) {
632 printk(KERN_ERR "Can't register temperatures device !\n");
633 return -ENODEV;
634 }
635
636 err = device_create_file(&of_dev->dev, &dev_attr_sensor1_temperature);
637 err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_temperature);
638 err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_limit);
639 err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_limit);
640 err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_location);
641 err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_location);
642 err |= device_create_file(&of_dev->dev, &dev_attr_limit_adjust);
643 err |= device_create_file(&of_dev->dev, &dev_attr_specified_fan_speed);
644 err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_fan_speed);
645 if(therm_type == ADT7460)
646 err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_fan_speed);
647 if (err)
648 printk(KERN_WARNING
649 "Failed to create tempertaure attribute file(s).\n");
650
651 #ifndef CONFIG_I2C_POWERMAC
652 request_module("i2c-powermac");
653 #endif
654
655 return i2c_add_driver(&thermostat_driver);
656 }
657
658 static void __exit
659 thermostat_exit(void)
660 {
661 if (of_dev) {
662 device_remove_file(&of_dev->dev, &dev_attr_sensor1_temperature);
663 device_remove_file(&of_dev->dev, &dev_attr_sensor2_temperature);
664 device_remove_file(&of_dev->dev, &dev_attr_sensor1_limit);
665 device_remove_file(&of_dev->dev, &dev_attr_sensor2_limit);
666 device_remove_file(&of_dev->dev, &dev_attr_sensor1_location);
667 device_remove_file(&of_dev->dev, &dev_attr_sensor2_location);
668 device_remove_file(&of_dev->dev, &dev_attr_limit_adjust);
669 device_remove_file(&of_dev->dev, &dev_attr_specified_fan_speed);
670 device_remove_file(&of_dev->dev, &dev_attr_sensor1_fan_speed);
671
672 if(therm_type == ADT7460)
673 device_remove_file(&of_dev->dev,
674 &dev_attr_sensor2_fan_speed);
675
676 of_device_unregister(of_dev);
677 }
678 i2c_del_driver(&thermostat_driver);
679 }
680
681 module_init(thermostat_init);
682 module_exit(thermostat_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree