[PATCH] i2c: Drop i2c_driver.{owner,name}, 3 of 11
[linux-2.6.git] / drivers / hwmon / fscpos.c
1 /*
2         fscpos.c - Kernel module for hardware monitoring with FSC Poseidon chips
3         Copyright (C) 2004, 2005 Stefan Ott <stefan@desire.ch>
4
5         This program is free software; you can redistribute it and/or modify
6         it under the terms of the GNU General Public License as published by
7         the Free Software Foundation; either version 2 of the License, or
8         (at your option) any later version.
9
10         This program is distributed in the hope that it will be useful,
11         but WITHOUT ANY WARRANTY; without even the implied warranty of
12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13         GNU General Public License for more details.
14
15         You should have received a copy of the GNU General Public License
16         along with this program; if not, write to the Free Software
17         Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20 /*
21         fujitsu siemens poseidon chip,
22         module based on the old fscpos module by Hermann Jung <hej@odn.de> and
23         the fscher module by Reinhard Nissl <rnissl@gmx.de>
24
25         original module based on lm80.c
26         Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
27         and Philip Edelbrock <phil@netroedge.com>
28
29         Thanks to Jean Delvare for reviewing my code and suggesting a lot of
30         improvements.
31 */
32
33 #include <linux/module.h>
34 #include <linux/slab.h>
35 #include <linux/jiffies.h>
36 #include <linux/i2c.h>
37 #include <linux/init.h>
38 #include <linux/hwmon.h>
39 #include <linux/err.h>
40
41 /*
42  * Addresses to scan
43  */
44 static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
45
46 /*
47  * Insmod parameters
48  */
49 I2C_CLIENT_INSMOD_1(fscpos);
50
51 /*
52  * The FSCPOS registers
53  */
54
55 /* chip identification */
56 #define FSCPOS_REG_IDENT_0              0x00
57 #define FSCPOS_REG_IDENT_1              0x01
58 #define FSCPOS_REG_IDENT_2              0x02
59 #define FSCPOS_REG_REVISION             0x03
60
61 /* global control and status */
62 #define FSCPOS_REG_EVENT_STATE          0x04
63 #define FSCPOS_REG_CONTROL              0x05
64
65 /* watchdog */
66 #define FSCPOS_REG_WDOG_PRESET          0x28
67 #define FSCPOS_REG_WDOG_STATE           0x23
68 #define FSCPOS_REG_WDOG_CONTROL         0x21
69
70 /* voltages */
71 #define FSCPOS_REG_VOLT_12              0x45
72 #define FSCPOS_REG_VOLT_5               0x42
73 #define FSCPOS_REG_VOLT_BATT            0x48
74
75 /* fans - the chip does not support minimum speed for fan2 */
76 static u8 FSCPOS_REG_PWM[] = { 0x55, 0x65 };
77 static u8 FSCPOS_REG_FAN_ACT[] = { 0x0e, 0x6b, 0xab };
78 static u8 FSCPOS_REG_FAN_STATE[] = { 0x0d, 0x62, 0xa2 };
79 static u8 FSCPOS_REG_FAN_RIPPLE[] = { 0x0f, 0x6f, 0xaf };
80
81 /* temperatures */
82 static u8 FSCPOS_REG_TEMP_ACT[] = { 0x64, 0x32, 0x35 };
83 static u8 FSCPOS_REG_TEMP_STATE[] = { 0x71, 0x81, 0x91 };
84
85 /*
86  * Functions declaration
87  */
88 static int fscpos_attach_adapter(struct i2c_adapter *adapter);
89 static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind);
90 static int fscpos_detach_client(struct i2c_client *client);
91
92 static int fscpos_read_value(struct i2c_client *client, u8 register);
93 static int fscpos_write_value(struct i2c_client *client, u8 register, u8 value);
94 static struct fscpos_data *fscpos_update_device(struct device *dev);
95 static void fscpos_init_client(struct i2c_client *client);
96
97 static void reset_fan_alarm(struct i2c_client *client, int nr);
98
99 /*
100  * Driver data (common to all clients)
101  */
102 static struct i2c_driver fscpos_driver = {
103         .driver = {
104                 .owner  = THIS_MODULE,
105                 .name   = "fscpos",
106         },
107         .id             = I2C_DRIVERID_FSCPOS,
108         .attach_adapter = fscpos_attach_adapter,
109         .detach_client  = fscpos_detach_client,
110 };
111
112 /*
113  * Client data (each client gets its own)
114  */
115 struct fscpos_data {
116         struct i2c_client client;
117         struct class_device *class_dev;
118         struct semaphore update_lock;
119         char valid;             /* 0 until following fields are valid */
120         unsigned long last_updated;     /* In jiffies */
121
122         /* register values */
123         u8 revision;            /* revision of chip */
124         u8 global_event;        /* global event status */
125         u8 global_control;      /* global control register */
126         u8 wdog_control;        /* watchdog control */
127         u8 wdog_state;          /* watchdog status */
128         u8 wdog_preset;         /* watchdog preset */
129         u8 volt[3];             /* 12, 5, battery current */
130         u8 temp_act[3];         /* temperature */
131         u8 temp_status[3];      /* status of sensor */
132         u8 fan_act[3];          /* fans revolutions per second */
133         u8 fan_status[3];       /* fan status */
134         u8 pwm[2];              /* fan min value for rps */
135         u8 fan_ripple[3];       /* divider for rps */
136 };
137
138 /* Temperature */
139 #define TEMP_FROM_REG(val)      (((val) - 128) * 1000)
140
141 static ssize_t show_temp_input(struct fscpos_data *data, char *buf, int nr)
142 {
143         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[nr - 1]));
144 }
145
146 static ssize_t show_temp_status(struct fscpos_data *data, char *buf, int nr)
147 {
148         /* bits 2..7 reserved => mask with 0x03 */
149         return sprintf(buf, "%u\n", data->temp_status[nr - 1] & 0x03);
150 }
151
152 static ssize_t show_temp_reset(struct fscpos_data *data, char *buf, int nr)
153 {
154         return sprintf(buf, "1\n");
155 }
156
157 static ssize_t set_temp_reset(struct i2c_client *client, struct fscpos_data
158                         *data, const char *buf, size_t count, int nr, int reg)
159 {
160         unsigned long v = simple_strtoul(buf, NULL, 10);
161         if (v != 1) {
162                 dev_err(&client->dev, "temp_reset value %ld not supported. "
163                                         "Use 1 to reset the alarm!\n", v);
164                 return -EINVAL;
165         }
166
167         dev_info(&client->dev, "You used the temp_reset feature which has not "
168                                 "been proplerly tested. Please report your "
169                                 "experience to the module author.\n");
170
171         /* Supported value: 2 (clears the status) */
172         fscpos_write_value(client, FSCPOS_REG_TEMP_STATE[nr - 1], 2);
173         return count;
174 }
175
176 /* Fans */
177 #define RPM_FROM_REG(val)       ((val) * 60)
178
179 static ssize_t show_fan_status(struct fscpos_data *data, char *buf, int nr)
180 {
181         /* bits 0..1, 3..7 reserved => mask with 0x04 */
182         return sprintf(buf, "%u\n", data->fan_status[nr - 1] & 0x04);
183 }
184
185 static ssize_t show_fan_input(struct fscpos_data *data, char *buf, int nr)
186 {
187         return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[nr - 1]));
188 }
189
190 static ssize_t show_fan_ripple(struct fscpos_data *data, char *buf, int nr)
191 {
192         /* bits 2..7 reserved => mask with 0x03 */
193         return sprintf(buf, "%u\n", data->fan_ripple[nr - 1] & 0x03);
194 }
195
196 static ssize_t set_fan_ripple(struct i2c_client *client, struct fscpos_data
197                         *data, const char *buf, size_t count, int nr, int reg)
198 {
199         /* supported values: 2, 4, 8 */
200         unsigned long v = simple_strtoul(buf, NULL, 10);
201
202         switch (v) {
203                 case 2: v = 1; break;
204                 case 4: v = 2; break;
205                 case 8: v = 3; break;
206         default:
207                 dev_err(&client->dev, "fan_ripple value %ld not supported. "
208                                         "Must be one of 2, 4 or 8!\n", v);
209                 return -EINVAL;
210         }
211         
212         down(&data->update_lock);
213         /* bits 2..7 reserved => mask with 0x03 */
214         data->fan_ripple[nr - 1] &= ~0x03;
215         data->fan_ripple[nr - 1] |= v;
216         
217         fscpos_write_value(client, reg, data->fan_ripple[nr - 1]);
218         up(&data->update_lock);
219         return count;
220 }
221
222 static ssize_t show_pwm(struct fscpos_data *data, char *buf, int nr)
223 {
224         return sprintf(buf, "%u\n", data->pwm[nr - 1]);
225 }
226
227 static ssize_t set_pwm(struct i2c_client *client, struct fscpos_data *data,
228                                 const char *buf, size_t count, int nr, int reg)
229 {
230         unsigned long v = simple_strtoul(buf, NULL, 10);
231
232         /* Range: 0..255 */
233         if (v < 0) v = 0;
234         if (v > 255) v = 255;
235
236         down(&data->update_lock);
237         data->pwm[nr - 1] = v;
238         fscpos_write_value(client, reg, data->pwm[nr - 1]);
239         up(&data->update_lock);
240         return count;
241 }
242
243 static void reset_fan_alarm(struct i2c_client *client, int nr)
244 {
245         fscpos_write_value(client, FSCPOS_REG_FAN_STATE[nr], 4);
246 }
247
248 /* Volts */
249 #define VOLT_FROM_REG(val, mult)        ((val) * (mult) / 255)
250
251 static ssize_t show_volt_12(struct device *dev, struct device_attribute *attr, char *buf)
252 {
253         struct fscpos_data *data = fscpos_update_device(dev);
254         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[0], 14200));
255 }
256
257 static ssize_t show_volt_5(struct device *dev, struct device_attribute *attr, char *buf)
258 {
259         struct fscpos_data *data = fscpos_update_device(dev);
260         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[1], 6600));
261 }
262
263 static ssize_t show_volt_batt(struct device *dev, struct device_attribute *attr, char *buf)
264 {
265         struct fscpos_data *data = fscpos_update_device(dev);
266         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[2], 3300));
267 }
268
269 /* Watchdog */
270 static ssize_t show_wdog_control(struct fscpos_data *data, char *buf)
271 {
272         /* bits 0..3 reserved, bit 6 write only => mask with 0xb0 */
273         return sprintf(buf, "%u\n", data->wdog_control & 0xb0);
274 }
275
276 static ssize_t set_wdog_control(struct i2c_client *client, struct fscpos_data
277                                 *data, const char *buf, size_t count, int reg)
278 {
279         /* bits 0..3 reserved => mask with 0xf0 */
280         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
281
282         down(&data->update_lock);
283         data->wdog_control &= ~0xf0;
284         data->wdog_control |= v;
285         fscpos_write_value(client, reg, data->wdog_control);
286         up(&data->update_lock);
287         return count;
288 }
289
290 static ssize_t show_wdog_state(struct fscpos_data *data, char *buf)
291 {
292         /* bits 0, 2..7 reserved => mask with 0x02 */
293         return sprintf(buf, "%u\n", data->wdog_state & 0x02);
294 }
295
296 static ssize_t set_wdog_state(struct i2c_client *client, struct fscpos_data
297                                 *data, const char *buf, size_t count, int reg)
298 {
299         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
300
301         /* Valid values: 2 (clear) */
302         if (v != 2) {
303                 dev_err(&client->dev, "wdog_state value %ld not supported. "
304                                         "Must be 2 to clear the state!\n", v);
305                 return -EINVAL;
306         }
307
308         down(&data->update_lock);
309         data->wdog_state &= ~v;
310         fscpos_write_value(client, reg, v);
311         up(&data->update_lock);
312         return count;
313 }
314
315 static ssize_t show_wdog_preset(struct fscpos_data *data, char *buf)
316 {
317         return sprintf(buf, "%u\n", data->wdog_preset);
318 }
319
320 static ssize_t set_wdog_preset(struct i2c_client *client, struct fscpos_data
321                                 *data, const char *buf, size_t count, int reg)
322 {
323         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
324
325         down(&data->update_lock);
326         data->wdog_preset = v;
327         fscpos_write_value(client, reg, data->wdog_preset);
328         up(&data->update_lock);
329         return count;
330 }
331
332 /* Event */
333 static ssize_t show_event(struct device *dev, struct device_attribute *attr, char *buf)
334 {
335         /* bits 5..7 reserved => mask with 0x1f */
336         struct fscpos_data *data = fscpos_update_device(dev);
337         return sprintf(buf, "%u\n", data->global_event & 0x9b);
338 }
339
340 /*
341  * Sysfs stuff
342  */
343 #define create_getter(kind, sub) \
344         static ssize_t sysfs_show_##kind##sub(struct device *dev, struct device_attribute *attr, char *buf) \
345         { \
346                 struct fscpos_data *data = fscpos_update_device(dev); \
347                 return show_##kind##sub(data, buf); \
348         }
349
350 #define create_getter_n(kind, offset, sub) \
351         static ssize_t sysfs_show_##kind##offset##sub(struct device *dev, struct device_attribute *attr, char\
352                                                                         *buf) \
353         { \
354                 struct fscpos_data *data = fscpos_update_device(dev); \
355                 return show_##kind##sub(data, buf, offset); \
356         }
357
358 #define create_setter(kind, sub, reg) \
359         static ssize_t sysfs_set_##kind##sub (struct device *dev, struct device_attribute *attr, const char \
360                                                         *buf, size_t count) \
361         { \
362                 struct i2c_client *client = to_i2c_client(dev); \
363                 struct fscpos_data *data = i2c_get_clientdata(client); \
364                 return set_##kind##sub(client, data, buf, count, reg); \
365         }
366
367 #define create_setter_n(kind, offset, sub, reg) \
368         static ssize_t sysfs_set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, \
369                                         const char *buf, size_t count) \
370         { \
371                 struct i2c_client *client = to_i2c_client(dev); \
372                 struct fscpos_data *data = i2c_get_clientdata(client); \
373                 return set_##kind##sub(client, data, buf, count, offset, reg);\
374         }
375
376 #define create_sysfs_device_ro(kind, sub, offset) \
377         static DEVICE_ATTR(kind##offset##sub, S_IRUGO, \
378                                         sysfs_show_##kind##offset##sub, NULL);
379
380 #define create_sysfs_device_rw(kind, sub, offset) \
381         static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, \
382                 sysfs_show_##kind##offset##sub, sysfs_set_##kind##offset##sub);
383
384 #define sysfs_ro_n(kind, sub, offset) \
385         create_getter_n(kind, offset, sub); \
386         create_sysfs_device_ro(kind, sub, offset);
387
388 #define sysfs_rw_n(kind, sub, offset, reg) \
389         create_getter_n(kind, offset, sub); \
390         create_setter_n(kind, offset, sub, reg); \
391         create_sysfs_device_rw(kind, sub, offset);
392
393 #define sysfs_rw(kind, sub, reg) \
394         create_getter(kind, sub); \
395         create_setter(kind, sub, reg); \
396         create_sysfs_device_rw(kind, sub,);
397
398 #define sysfs_fan_with_min(offset, reg_status, reg_ripple, reg_min) \
399         sysfs_fan(offset, reg_status, reg_ripple); \
400         sysfs_rw_n(pwm,, offset, reg_min);
401
402 #define sysfs_fan(offset, reg_status, reg_ripple) \
403         sysfs_ro_n(fan, _input, offset); \
404         sysfs_ro_n(fan, _status, offset); \
405         sysfs_rw_n(fan, _ripple, offset, reg_ripple);
406
407 #define sysfs_temp(offset, reg_status) \
408         sysfs_ro_n(temp, _input, offset); \
409         sysfs_ro_n(temp, _status, offset); \
410         sysfs_rw_n(temp, _reset, offset, reg_status);
411
412 #define sysfs_watchdog(reg_wdog_preset, reg_wdog_state, reg_wdog_control) \
413         sysfs_rw(wdog, _control, reg_wdog_control); \
414         sysfs_rw(wdog, _preset, reg_wdog_preset); \
415         sysfs_rw(wdog, _state, reg_wdog_state);
416
417 sysfs_fan_with_min(1, FSCPOS_REG_FAN_STATE[0], FSCPOS_REG_FAN_RIPPLE[0],
418                                                         FSCPOS_REG_PWM[0]);
419 sysfs_fan_with_min(2, FSCPOS_REG_FAN_STATE[1], FSCPOS_REG_FAN_RIPPLE[1],
420                                                         FSCPOS_REG_PWM[1]);
421 sysfs_fan(3, FSCPOS_REG_FAN_STATE[2], FSCPOS_REG_FAN_RIPPLE[2]);
422
423 sysfs_temp(1, FSCPOS_REG_TEMP_STATE[0]);
424 sysfs_temp(2, FSCPOS_REG_TEMP_STATE[1]);
425 sysfs_temp(3, FSCPOS_REG_TEMP_STATE[2]);
426
427 sysfs_watchdog(FSCPOS_REG_WDOG_PRESET, FSCPOS_REG_WDOG_STATE,
428                                                 FSCPOS_REG_WDOG_CONTROL);
429
430 static DEVICE_ATTR(event, S_IRUGO, show_event, NULL);
431 static DEVICE_ATTR(in0_input, S_IRUGO, show_volt_12, NULL);
432 static DEVICE_ATTR(in1_input, S_IRUGO, show_volt_5, NULL);
433 static DEVICE_ATTR(in2_input, S_IRUGO, show_volt_batt, NULL);
434
435 static int fscpos_attach_adapter(struct i2c_adapter *adapter)
436 {
437         if (!(adapter->class & I2C_CLASS_HWMON))
438                 return 0;
439         return i2c_probe(adapter, &addr_data, fscpos_detect);
440 }
441
442 static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind)
443 {
444         struct i2c_client *new_client;
445         struct fscpos_data *data;
446         int err = 0;
447
448         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
449                 goto exit;
450
451         /*
452          * OK. For now, we presume we have a valid client. We now create the
453          * client structure, even though we cannot fill it completely yet.
454          * But it allows us to access fscpos_{read,write}_value.
455          */
456
457         if (!(data = kzalloc(sizeof(struct fscpos_data), GFP_KERNEL))) {
458                 err = -ENOMEM;
459                 goto exit;
460         }
461
462         new_client = &data->client;
463         i2c_set_clientdata(new_client, data);
464         new_client->addr = address;
465         new_client->adapter = adapter;
466         new_client->driver = &fscpos_driver;
467         new_client->flags = 0;
468
469         /* Do the remaining detection unless force or force_fscpos parameter */
470         if (kind < 0) {
471                 if ((fscpos_read_value(new_client, FSCPOS_REG_IDENT_0)
472                         != 0x50) /* 'P' */
473                 || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_1)
474                         != 0x45) /* 'E' */
475                 || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_2)
476                         != 0x47))/* 'G' */
477                 {
478                         dev_dbg(&new_client->dev, "fscpos detection failed\n");
479                         goto exit_free;
480                 }
481         }
482
483         /* Fill in the remaining client fields and put it in the global list */
484         strlcpy(new_client->name, "fscpos", I2C_NAME_SIZE);
485
486         data->valid = 0;
487         init_MUTEX(&data->update_lock);
488
489         /* Tell the I2C layer a new client has arrived */
490         if ((err = i2c_attach_client(new_client)))
491                 goto exit_free;
492
493         /* Inizialize the fscpos chip */
494         fscpos_init_client(new_client);
495
496         /* Announce that the chip was found */
497         dev_info(&new_client->dev, "Found fscpos chip, rev %u\n", data->revision);
498
499         /* Register sysfs hooks */
500         data->class_dev = hwmon_device_register(&new_client->dev);
501         if (IS_ERR(data->class_dev)) {
502                 err = PTR_ERR(data->class_dev);
503                 goto exit_detach;
504         }
505
506         device_create_file(&new_client->dev, &dev_attr_event);
507         device_create_file(&new_client->dev, &dev_attr_in0_input);
508         device_create_file(&new_client->dev, &dev_attr_in1_input);
509         device_create_file(&new_client->dev, &dev_attr_in2_input);
510         device_create_file(&new_client->dev, &dev_attr_wdog_control);
511         device_create_file(&new_client->dev, &dev_attr_wdog_preset);
512         device_create_file(&new_client->dev, &dev_attr_wdog_state);
513         device_create_file(&new_client->dev, &dev_attr_temp1_input);
514         device_create_file(&new_client->dev, &dev_attr_temp1_status);
515         device_create_file(&new_client->dev, &dev_attr_temp1_reset);
516         device_create_file(&new_client->dev, &dev_attr_temp2_input);
517         device_create_file(&new_client->dev, &dev_attr_temp2_status);
518         device_create_file(&new_client->dev, &dev_attr_temp2_reset);
519         device_create_file(&new_client->dev, &dev_attr_temp3_input);
520         device_create_file(&new_client->dev, &dev_attr_temp3_status);
521         device_create_file(&new_client->dev, &dev_attr_temp3_reset);
522         device_create_file(&new_client->dev, &dev_attr_fan1_input);
523         device_create_file(&new_client->dev, &dev_attr_fan1_status);
524         device_create_file(&new_client->dev, &dev_attr_fan1_ripple);
525         device_create_file(&new_client->dev, &dev_attr_pwm1);
526         device_create_file(&new_client->dev, &dev_attr_fan2_input);
527         device_create_file(&new_client->dev, &dev_attr_fan2_status);
528         device_create_file(&new_client->dev, &dev_attr_fan2_ripple);
529         device_create_file(&new_client->dev, &dev_attr_pwm2);
530         device_create_file(&new_client->dev, &dev_attr_fan3_input);
531         device_create_file(&new_client->dev, &dev_attr_fan3_status);
532         device_create_file(&new_client->dev, &dev_attr_fan3_ripple);
533
534         return 0;
535
536 exit_detach:
537         i2c_detach_client(new_client);
538 exit_free:
539         kfree(data);
540 exit:
541         return err;
542 }
543
544 static int fscpos_detach_client(struct i2c_client *client)
545 {
546         struct fscpos_data *data = i2c_get_clientdata(client);
547         int err;
548
549         hwmon_device_unregister(data->class_dev);
550
551         if ((err = i2c_detach_client(client)))
552                 return err;
553         kfree(data);
554         return 0;
555 }
556
557 static int fscpos_read_value(struct i2c_client *client, u8 reg)
558 {
559         dev_dbg(&client->dev, "Read reg 0x%02x\n", reg);
560         return i2c_smbus_read_byte_data(client, reg);
561 }
562
563 static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value)
564 {
565         dev_dbg(&client->dev, "Write reg 0x%02x, val 0x%02x\n", reg, value);
566         return i2c_smbus_write_byte_data(client, reg, value);
567 }
568
569 /* Called when we have found a new FSCPOS chip */
570 static void fscpos_init_client(struct i2c_client *client)
571 {
572         struct fscpos_data *data = i2c_get_clientdata(client);
573
574         /* read revision from chip */
575         data->revision = fscpos_read_value(client, FSCPOS_REG_REVISION);
576 }
577
578 static struct fscpos_data *fscpos_update_device(struct device *dev)
579 {
580         struct i2c_client *client = to_i2c_client(dev);
581         struct fscpos_data *data = i2c_get_clientdata(client);
582
583         down(&data->update_lock);
584
585         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
586                 int i;
587
588                 dev_dbg(&client->dev, "Starting fscpos update\n");
589
590                 for (i = 0; i < 3; i++) {
591                         data->temp_act[i] = fscpos_read_value(client,
592                                                 FSCPOS_REG_TEMP_ACT[i]);
593                         data->temp_status[i] = fscpos_read_value(client,
594                                                 FSCPOS_REG_TEMP_STATE[i]);
595                         data->fan_act[i] = fscpos_read_value(client,
596                                                 FSCPOS_REG_FAN_ACT[i]);
597                         data->fan_status[i] = fscpos_read_value(client,
598                                                 FSCPOS_REG_FAN_STATE[i]);
599                         data->fan_ripple[i] = fscpos_read_value(client,
600                                                 FSCPOS_REG_FAN_RIPPLE[i]);
601                         if (i < 2) {
602                                 /* fan2_min is not supported by the chip */
603                                 data->pwm[i] = fscpos_read_value(client,
604                                                         FSCPOS_REG_PWM[i]);
605                         }
606                         /* reset fan status if speed is back to > 0 */
607                         if (data->fan_status[i] != 0 && data->fan_act[i] > 0) {
608                                 reset_fan_alarm(client, i);
609                         }
610                 }
611
612                 data->volt[0] = fscpos_read_value(client, FSCPOS_REG_VOLT_12);
613                 data->volt[1] = fscpos_read_value(client, FSCPOS_REG_VOLT_5);
614                 data->volt[2] = fscpos_read_value(client, FSCPOS_REG_VOLT_BATT);
615
616                 data->wdog_preset = fscpos_read_value(client,
617                                                         FSCPOS_REG_WDOG_PRESET);
618                 data->wdog_state = fscpos_read_value(client,
619                                                         FSCPOS_REG_WDOG_STATE);
620                 data->wdog_control = fscpos_read_value(client,
621                                                 FSCPOS_REG_WDOG_CONTROL);
622
623                 data->global_event = fscpos_read_value(client,
624                                                 FSCPOS_REG_EVENT_STATE);
625
626                 data->last_updated = jiffies;
627                 data->valid = 1;
628         }
629         up(&data->update_lock);
630         return data;
631 }
632
633 static int __init sm_fscpos_init(void)
634 {
635         return i2c_add_driver(&fscpos_driver);
636 }
637
638 static void __exit sm_fscpos_exit(void)
639 {
640         i2c_del_driver(&fscpos_driver);
641 }
642
643 MODULE_AUTHOR("Stefan Ott <stefan@desire.ch> based on work from Hermann Jung "
644                                 "<hej@odn.de>, Frodo Looijaard <frodol@dds.nl>"
645                                 " and Philip Edelbrock <phil@netroedge.com>");
646 MODULE_DESCRIPTION("fujitsu siemens poseidon chip driver");
647 MODULE_LICENSE("GPL");
648
649 module_init(sm_fscpos_init);
650 module_exit(sm_fscpos_exit);