Root/
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 | static void thermostat_create_files(void); |
94 | static void thermostat_remove_files(void); |
95 | |
96 | static int |
97 | write_reg(struct thermostat* th, int reg, u8 data) |
98 | { |
99 | u8 tmp[2]; |
100 | int rc; |
101 | |
102 | tmp[0] = reg; |
103 | tmp[1] = data; |
104 | rc = i2c_master_send(th->clt, (const char *)tmp, 2); |
105 | if (rc < 0) |
106 | return rc; |
107 | if (rc != 2) |
108 | return -ENODEV; |
109 | return 0; |
110 | } |
111 | |
112 | static int |
113 | read_reg(struct thermostat* th, int reg) |
114 | { |
115 | u8 reg_addr, data; |
116 | int rc; |
117 | |
118 | reg_addr = (u8)reg; |
119 | rc = i2c_master_send(th->clt, ®_addr, 1); |
120 | if (rc < 0) |
121 | return rc; |
122 | if (rc != 1) |
123 | return -ENODEV; |
124 | rc = i2c_master_recv(th->clt, (char *)&data, 1); |
125 | if (rc < 0) |
126 | return rc; |
127 | return data; |
128 | } |
129 | |
130 | static struct i2c_driver thermostat_driver; |
131 | |
132 | static int |
133 | attach_thermostat(struct i2c_adapter *adapter) |
134 | { |
135 | unsigned long bus_no; |
136 | struct i2c_board_info info; |
137 | struct i2c_client *client; |
138 | |
139 | if (strncmp(adapter->name, "uni-n", 5)) |
140 | return -ENODEV; |
141 | bus_no = simple_strtoul(adapter->name + 6, NULL, 10); |
142 | if (bus_no != therm_bus) |
143 | return -ENODEV; |
144 | |
145 | memset(&info, 0, sizeof(struct i2c_board_info)); |
146 | strlcpy(info.type, "therm_adt746x", I2C_NAME_SIZE); |
147 | info.addr = therm_address; |
148 | client = i2c_new_device(adapter, &info); |
149 | if (!client) |
150 | return -ENODEV; |
151 | |
152 | /* |
153 | * Let i2c-core delete that device on driver removal. |
154 | * This is safe because i2c-core holds the core_lock mutex for us. |
155 | */ |
156 | list_add_tail(&client->detected, &thermostat_driver.clients); |
157 | return 0; |
158 | } |
159 | |
160 | static int |
161 | remove_thermostat(struct i2c_client *client) |
162 | { |
163 | struct thermostat *th = i2c_get_clientdata(client); |
164 | int i; |
165 | |
166 | thermostat_remove_files(); |
167 | |
168 | if (thread_therm != NULL) { |
169 | kthread_stop(thread_therm); |
170 | } |
171 | |
172 | printk(KERN_INFO "adt746x: Putting max temperatures back from " |
173 | "%d, %d, %d to %d, %d, %d\n", |
174 | th->limits[0], th->limits[1], th->limits[2], |
175 | th->initial_limits[0], th->initial_limits[1], |
176 | th->initial_limits[2]); |
177 | |
178 | for (i = 0; i < 3; i++) |
179 | write_reg(th, LIMIT_REG[i], th->initial_limits[i]); |
180 | |
181 | write_both_fan_speed(th, -1); |
182 | |
183 | thermostat = NULL; |
184 | |
185 | kfree(th); |
186 | |
187 | return 0; |
188 | } |
189 | |
190 | static int read_fan_speed(struct thermostat *th, u8 addr) |
191 | { |
192 | u8 tmp[2]; |
193 | u16 res; |
194 | |
195 | /* should start with low byte */ |
196 | tmp[1] = read_reg(th, addr); |
197 | tmp[0] = read_reg(th, addr + 1); |
198 | |
199 | res = tmp[1] + (tmp[0] << 8); |
200 | /* "a value of 0xffff means that the fan has stopped" */ |
201 | return (res == 0xffff ? 0 : (90000*60)/res); |
202 | } |
203 | |
204 | static void write_both_fan_speed(struct thermostat *th, int speed) |
205 | { |
206 | write_fan_speed(th, speed, 0); |
207 | if (therm_type == ADT7460) |
208 | write_fan_speed(th, speed, 1); |
209 | } |
210 | |
211 | static void write_fan_speed(struct thermostat *th, int speed, int fan) |
212 | { |
213 | u8 manual; |
214 | |
215 | if (speed > 0xff) |
216 | speed = 0xff; |
217 | else if (speed < -1) |
218 | speed = 0; |
219 | |
220 | if (therm_type == ADT7467 && fan == 1) |
221 | return; |
222 | |
223 | if (th->last_speed[fan] != speed) { |
224 | if (verbose) { |
225 | if (speed == -1) |
226 | printk(KERN_DEBUG "adt746x: Setting speed to automatic " |
227 | "for %s fan.\n", sensor_location[fan+1]); |
228 | else |
229 | printk(KERN_DEBUG "adt746x: Setting speed to %d " |
230 | "for %s fan.\n", speed, sensor_location[fan+1]); |
231 | } |
232 | } else |
233 | return; |
234 | |
235 | if (speed >= 0) { |
236 | manual = read_reg(th, MANUAL_MODE[fan]); |
237 | manual &= ~INVERT_MASK; |
238 | write_reg(th, MANUAL_MODE[fan], |
239 | manual | MANUAL_MASK | th->pwm_inv[fan]); |
240 | write_reg(th, FAN_SPD_SET[fan], speed); |
241 | } else { |
242 | /* back to automatic */ |
243 | if(therm_type == ADT7460) { |
244 | manual = read_reg(th, |
245 | MANUAL_MODE[fan]) & (~MANUAL_MASK); |
246 | manual &= ~INVERT_MASK; |
247 | manual |= th->pwm_inv[fan]; |
248 | write_reg(th, |
249 | MANUAL_MODE[fan], manual|REM_CONTROL[fan]); |
250 | } else { |
251 | manual = read_reg(th, MANUAL_MODE[fan]); |
252 | manual &= ~INVERT_MASK; |
253 | manual |= th->pwm_inv[fan]; |
254 | write_reg(th, MANUAL_MODE[fan], manual&(~AUTO_MASK)); |
255 | } |
256 | } |
257 | |
258 | th->last_speed[fan] = speed; |
259 | } |
260 | |
261 | static void read_sensors(struct thermostat *th) |
262 | { |
263 | int i = 0; |
264 | |
265 | for (i = 0; i < 3; i++) |
266 | th->temps[i] = read_reg(th, TEMP_REG[i]); |
267 | } |
268 | |
269 | #ifdef DEBUG |
270 | static void display_stats(struct thermostat *th) |
271 | { |
272 | if (th->temps[0] != th->cached_temp[0] |
273 | || th->temps[1] != th->cached_temp[1] |
274 | || th->temps[2] != th->cached_temp[2]) { |
275 | printk(KERN_INFO "adt746x: Temperature infos:" |
276 | " thermostats: %d,%d,%d;" |
277 | " limits: %d,%d,%d;" |
278 | " fan speed: %d RPM\n", |
279 | th->temps[0], th->temps[1], th->temps[2], |
280 | th->limits[0], th->limits[1], th->limits[2], |
281 | read_fan_speed(th, FAN_SPEED[0])); |
282 | } |
283 | th->cached_temp[0] = th->temps[0]; |
284 | th->cached_temp[1] = th->temps[1]; |
285 | th->cached_temp[2] = th->temps[2]; |
286 | } |
287 | #endif |
288 | |
289 | static void update_fans_speed (struct thermostat *th) |
290 | { |
291 | int lastvar = 0; /* last variation, for iBook */ |
292 | int i = 0; |
293 | |
294 | /* we don't care about local sensor, so we start at sensor 1 */ |
295 | for (i = 1; i < 3; i++) { |
296 | int started = 0; |
297 | int fan_number = (therm_type == ADT7460 && i == 2); |
298 | int var = th->temps[i] - th->limits[i]; |
299 | |
300 | if (var > -1) { |
301 | int step = (255 - fan_speed) / 7; |
302 | int new_speed = 0; |
303 | |
304 | /* hysteresis : change fan speed only if variation is |
305 | * more than two degrees */ |
306 | if (abs(var - th->last_var[fan_number]) < 2) |
307 | continue; |
308 | |
309 | started = 1; |
310 | new_speed = fan_speed + ((var-1)*step); |
311 | |
312 | if (new_speed < fan_speed) |
313 | new_speed = fan_speed; |
314 | if (new_speed > 255) |
315 | new_speed = 255; |
316 | |
317 | if (verbose) |
318 | printk(KERN_DEBUG "adt746x: Setting fans speed to %d " |
319 | "(limit exceeded by %d on %s)\n", |
320 | new_speed, var, |
321 | sensor_location[fan_number+1]); |
322 | write_both_fan_speed(th, new_speed); |
323 | th->last_var[fan_number] = var; |
324 | } else if (var < -2) { |
325 | /* don't stop fan if sensor2 is cold and sensor1 is not |
326 | * so cold (lastvar >= -1) */ |
327 | if (i == 2 && lastvar < -1) { |
328 | if (th->last_speed[fan_number] != 0) |
329 | if (verbose) |
330 | printk(KERN_DEBUG "adt746x: Stopping " |
331 | "fans.\n"); |
332 | write_both_fan_speed(th, 0); |
333 | } |
334 | } |
335 | |
336 | lastvar = var; |
337 | |
338 | if (started) |
339 | return; /* we don't want to re-stop the fan |
340 | * if sensor1 is heating and sensor2 is not */ |
341 | } |
342 | } |
343 | |
344 | static int monitor_task(void *arg) |
345 | { |
346 | struct thermostat* th = arg; |
347 | |
348 | set_freezable(); |
349 | while(!kthread_should_stop()) { |
350 | try_to_freeze(); |
351 | msleep_interruptible(2000); |
352 | |
353 | #ifndef DEBUG |
354 | if (fan_speed != -1) |
355 | read_sensors(th); |
356 | #else |
357 | read_sensors(th); |
358 | #endif |
359 | |
360 | if (fan_speed != -1) |
361 | update_fans_speed(th); |
362 | |
363 | #ifdef DEBUG |
364 | display_stats(th); |
365 | #endif |
366 | |
367 | } |
368 | |
369 | return 0; |
370 | } |
371 | |
372 | static void set_limit(struct thermostat *th, int i) |
373 | { |
374 | /* Set sensor1 limit higher to avoid powerdowns */ |
375 | th->limits[i] = default_limits_chip[i] + limit_adjust; |
376 | write_reg(th, LIMIT_REG[i], th->limits[i]); |
377 | |
378 | /* set our limits to normal */ |
379 | th->limits[i] = default_limits_local[i] + limit_adjust; |
380 | } |
381 | |
382 | static int probe_thermostat(struct i2c_client *client, |
383 | const struct i2c_device_id *id) |
384 | { |
385 | struct thermostat* th; |
386 | int rc; |
387 | int i; |
388 | |
389 | if (thermostat) |
390 | return 0; |
391 | |
392 | th = kzalloc(sizeof(struct thermostat), GFP_KERNEL); |
393 | if (!th) |
394 | return -ENOMEM; |
395 | |
396 | i2c_set_clientdata(client, th); |
397 | th->clt = client; |
398 | |
399 | rc = read_reg(th, CONFIG_REG); |
400 | if (rc < 0) { |
401 | dev_err(&client->dev, "Thermostat failed to read config!\n"); |
402 | kfree(th); |
403 | return -ENODEV; |
404 | } |
405 | |
406 | /* force manual control to start the fan quieter */ |
407 | if (fan_speed == -1) |
408 | fan_speed = 64; |
409 | |
410 | if(therm_type == ADT7460) { |
411 | printk(KERN_INFO "adt746x: ADT7460 initializing\n"); |
412 | /* The 7460 needs to be started explicitly */ |
413 | write_reg(th, CONFIG_REG, 1); |
414 | } else |
415 | printk(KERN_INFO "adt746x: ADT7467 initializing\n"); |
416 | |
417 | for (i = 0; i < 3; i++) { |
418 | th->initial_limits[i] = read_reg(th, LIMIT_REG[i]); |
419 | set_limit(th, i); |
420 | } |
421 | |
422 | printk(KERN_INFO "adt746x: Lowering max temperatures from %d, %d, %d" |
423 | " to %d, %d, %d\n", |
424 | th->initial_limits[0], th->initial_limits[1], |
425 | th->initial_limits[2], th->limits[0], th->limits[1], |
426 | th->limits[2]); |
427 | |
428 | thermostat = th; |
429 | |
430 | /* record invert bit status because fw can corrupt it after suspend */ |
431 | th->pwm_inv[0] = read_reg(th, MANUAL_MODE[0]) & INVERT_MASK; |
432 | th->pwm_inv[1] = read_reg(th, MANUAL_MODE[1]) & INVERT_MASK; |
433 | |
434 | /* be sure to really write fan speed the first time */ |
435 | th->last_speed[0] = -2; |
436 | th->last_speed[1] = -2; |
437 | th->last_var[0] = -80; |
438 | th->last_var[1] = -80; |
439 | |
440 | if (fan_speed != -1) { |
441 | /* manual mode, stop fans */ |
442 | write_both_fan_speed(th, 0); |
443 | } else { |
444 | /* automatic mode */ |
445 | write_both_fan_speed(th, -1); |
446 | } |
447 | |
448 | thread_therm = kthread_run(monitor_task, th, "kfand"); |
449 | |
450 | if (thread_therm == ERR_PTR(-ENOMEM)) { |
451 | printk(KERN_INFO "adt746x: Kthread creation failed\n"); |
452 | thread_therm = NULL; |
453 | return -ENOMEM; |
454 | } |
455 | |
456 | thermostat_create_files(); |
457 | |
458 | return 0; |
459 | } |
460 | |
461 | static const struct i2c_device_id therm_adt746x_id[] = { |
462 | { "therm_adt746x", 0 }, |
463 | { } |
464 | }; |
465 | |
466 | static struct i2c_driver thermostat_driver = { |
467 | .driver = { |
468 | .name = "therm_adt746x", |
469 | }, |
470 | .attach_adapter = attach_thermostat, |
471 | .probe = probe_thermostat, |
472 | .remove = remove_thermostat, |
473 | .id_table = therm_adt746x_id, |
474 | }; |
475 | |
476 | /* |
477 | * Now, unfortunately, sysfs doesn't give us a nice void * we could |
478 | * pass around to the attribute functions, so we don't really have |
479 | * choice but implement a bunch of them... |
480 | * |
481 | * FIXME, it does now... |
482 | */ |
483 | #define BUILD_SHOW_FUNC_INT(name, data) \ |
484 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
485 | { \ |
486 | return sprintf(buf, "%d\n", data); \ |
487 | } |
488 | |
489 | #define BUILD_SHOW_FUNC_STR(name, data) \ |
490 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
491 | { \ |
492 | return sprintf(buf, "%s\n", data); \ |
493 | } |
494 | |
495 | #define BUILD_SHOW_FUNC_FAN(name, data) \ |
496 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
497 | { \ |
498 | return sprintf(buf, "%d (%d rpm)\n", \ |
499 | thermostat->last_speed[data], \ |
500 | read_fan_speed(thermostat, FAN_SPEED[data]) \ |
501 | ); \ |
502 | } |
503 | |
504 | #define BUILD_STORE_FUNC_DEG(name, data) \ |
505 | static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \ |
506 | { \ |
507 | int val; \ |
508 | int i; \ |
509 | val = simple_strtol(buf, NULL, 10); \ |
510 | printk(KERN_INFO "Adjusting limits by %d degrees\n", val); \ |
511 | limit_adjust = val; \ |
512 | for (i=0; i < 3; i++) \ |
513 | set_limit(thermostat, i); \ |
514 | return n; \ |
515 | } |
516 | |
517 | #define BUILD_STORE_FUNC_INT(name, data) \ |
518 | static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \ |
519 | { \ |
520 | int val; \ |
521 | val = simple_strtol(buf, NULL, 10); \ |
522 | if (val < 0 || val > 255) \ |
523 | return -EINVAL; \ |
524 | printk(KERN_INFO "Setting specified fan speed to %d\n", val); \ |
525 | data = val; \ |
526 | return n; \ |
527 | } |
528 | |
529 | BUILD_SHOW_FUNC_INT(sensor1_temperature, (read_reg(thermostat, TEMP_REG[1]))) |
530 | BUILD_SHOW_FUNC_INT(sensor2_temperature, (read_reg(thermostat, TEMP_REG[2]))) |
531 | BUILD_SHOW_FUNC_INT(sensor1_limit, thermostat->limits[1]) |
532 | BUILD_SHOW_FUNC_INT(sensor2_limit, thermostat->limits[2]) |
533 | BUILD_SHOW_FUNC_STR(sensor1_location, sensor_location[1]) |
534 | BUILD_SHOW_FUNC_STR(sensor2_location, sensor_location[2]) |
535 | |
536 | BUILD_SHOW_FUNC_INT(specified_fan_speed, fan_speed) |
537 | BUILD_SHOW_FUNC_FAN(sensor1_fan_speed, 0) |
538 | BUILD_SHOW_FUNC_FAN(sensor2_fan_speed, 1) |
539 | |
540 | BUILD_STORE_FUNC_INT(specified_fan_speed,fan_speed) |
541 | BUILD_SHOW_FUNC_INT(limit_adjust, limit_adjust) |
542 | BUILD_STORE_FUNC_DEG(limit_adjust, thermostat) |
543 | |
544 | static DEVICE_ATTR(sensor1_temperature, S_IRUGO, |
545 | show_sensor1_temperature,NULL); |
546 | static DEVICE_ATTR(sensor2_temperature, S_IRUGO, |
547 | show_sensor2_temperature,NULL); |
548 | static DEVICE_ATTR(sensor1_limit, S_IRUGO, |
549 | show_sensor1_limit, NULL); |
550 | static DEVICE_ATTR(sensor2_limit, S_IRUGO, |
551 | show_sensor2_limit, NULL); |
552 | static DEVICE_ATTR(sensor1_location, S_IRUGO, |
553 | show_sensor1_location, NULL); |
554 | static DEVICE_ATTR(sensor2_location, S_IRUGO, |
555 | show_sensor2_location, NULL); |
556 | |
557 | static DEVICE_ATTR(specified_fan_speed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, |
558 | show_specified_fan_speed,store_specified_fan_speed); |
559 | |
560 | static DEVICE_ATTR(sensor1_fan_speed, S_IRUGO, |
561 | show_sensor1_fan_speed, NULL); |
562 | static DEVICE_ATTR(sensor2_fan_speed, S_IRUGO, |
563 | show_sensor2_fan_speed, NULL); |
564 | |
565 | static DEVICE_ATTR(limit_adjust, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, |
566 | show_limit_adjust, store_limit_adjust); |
567 | |
568 | |
569 | static int __init |
570 | thermostat_init(void) |
571 | { |
572 | struct device_node* np; |
573 | const u32 *prop; |
574 | int i = 0, offset = 0; |
575 | |
576 | np = of_find_node_by_name(NULL, "fan"); |
577 | if (!np) |
578 | return -ENODEV; |
579 | if (of_device_is_compatible(np, "adt7460")) |
580 | therm_type = ADT7460; |
581 | else if (of_device_is_compatible(np, "adt7467")) |
582 | therm_type = ADT7467; |
583 | else { |
584 | of_node_put(np); |
585 | return -ENODEV; |
586 | } |
587 | |
588 | prop = of_get_property(np, "hwsensor-params-version", NULL); |
589 | printk(KERN_INFO "adt746x: version %d (%ssupported)\n", *prop, |
590 | (*prop == 1)?"":"un"); |
591 | if (*prop != 1) { |
592 | of_node_put(np); |
593 | return -ENODEV; |
594 | } |
595 | |
596 | prop = of_get_property(np, "reg", NULL); |
597 | if (!prop) { |
598 | of_node_put(np); |
599 | return -ENODEV; |
600 | } |
601 | |
602 | /* look for bus either by path or using "reg" */ |
603 | if (strstr(np->full_name, "/i2c-bus@") != NULL) { |
604 | const char *tmp_bus = (strstr(np->full_name, "/i2c-bus@") + 9); |
605 | therm_bus = tmp_bus[0]-'0'; |
606 | } else { |
607 | therm_bus = ((*prop) >> 8) & 0x0f; |
608 | } |
609 | |
610 | therm_address = ((*prop) & 0xff) >> 1; |
611 | |
612 | printk(KERN_INFO "adt746x: Thermostat bus: %d, address: 0x%02x, " |
613 | "limit_adjust: %d, fan_speed: %d\n", |
614 | therm_bus, therm_address, limit_adjust, fan_speed); |
615 | |
616 | if (of_get_property(np, "hwsensor-location", NULL)) { |
617 | for (i = 0; i < 3; i++) { |
618 | sensor_location[i] = of_get_property(np, |
619 | "hwsensor-location", NULL) + offset; |
620 | |
621 | if (sensor_location[i] == NULL) |
622 | sensor_location[i] = ""; |
623 | |
624 | printk(KERN_INFO "sensor %d: %s\n", i, sensor_location[i]); |
625 | offset += strlen(sensor_location[i]) + 1; |
626 | } |
627 | } else { |
628 | sensor_location[0] = "?"; |
629 | sensor_location[1] = "?"; |
630 | sensor_location[2] = "?"; |
631 | } |
632 | |
633 | of_dev = of_platform_device_create(np, "temperatures", NULL); |
634 | of_node_put(np); |
635 | |
636 | if (of_dev == NULL) { |
637 | printk(KERN_ERR "Can't register temperatures device !\n"); |
638 | return -ENODEV; |
639 | } |
640 | |
641 | #ifndef CONFIG_I2C_POWERMAC |
642 | request_module("i2c-powermac"); |
643 | #endif |
644 | |
645 | return i2c_add_driver(&thermostat_driver); |
646 | } |
647 | |
648 | static void thermostat_create_files(void) |
649 | { |
650 | int err; |
651 | |
652 | err = device_create_file(&of_dev->dev, &dev_attr_sensor1_temperature); |
653 | err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_temperature); |
654 | err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_limit); |
655 | err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_limit); |
656 | err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_location); |
657 | err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_location); |
658 | err |= device_create_file(&of_dev->dev, &dev_attr_limit_adjust); |
659 | err |= device_create_file(&of_dev->dev, &dev_attr_specified_fan_speed); |
660 | err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_fan_speed); |
661 | if(therm_type == ADT7460) |
662 | err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_fan_speed); |
663 | if (err) |
664 | printk(KERN_WARNING |
665 | "Failed to create tempertaure attribute file(s).\n"); |
666 | } |
667 | |
668 | static void thermostat_remove_files(void) |
669 | { |
670 | if (of_dev) { |
671 | device_remove_file(&of_dev->dev, &dev_attr_sensor1_temperature); |
672 | device_remove_file(&of_dev->dev, &dev_attr_sensor2_temperature); |
673 | device_remove_file(&of_dev->dev, &dev_attr_sensor1_limit); |
674 | device_remove_file(&of_dev->dev, &dev_attr_sensor2_limit); |
675 | device_remove_file(&of_dev->dev, &dev_attr_sensor1_location); |
676 | device_remove_file(&of_dev->dev, &dev_attr_sensor2_location); |
677 | device_remove_file(&of_dev->dev, &dev_attr_limit_adjust); |
678 | device_remove_file(&of_dev->dev, &dev_attr_specified_fan_speed); |
679 | device_remove_file(&of_dev->dev, &dev_attr_sensor1_fan_speed); |
680 | |
681 | if(therm_type == ADT7460) |
682 | device_remove_file(&of_dev->dev, |
683 | &dev_attr_sensor2_fan_speed); |
684 | |
685 | } |
686 | } |
687 | |
688 | static void __exit |
689 | thermostat_exit(void) |
690 | { |
691 | i2c_del_driver(&thermostat_driver); |
692 | of_device_unregister(of_dev); |
693 | } |
694 | |
695 | module_init(thermostat_init); |
696 | module_exit(thermostat_exit); |
697 |
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