[PATCH] I2C: use time_after in 3 chip drivers
[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/i2c-sensor.h>
38 #include <linux/init.h>
39
40 /*
41  * Addresses to scan
42  */
43 static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
44 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
45
46 /*
47  * Insmod parameters
48  */
49 SENSORS_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         .owner          = THIS_MODULE,
104         .name           = "fscpos",
105         .id             = I2C_DRIVERID_FSCPOS,
106         .flags          = I2C_DF_NOTIFY,
107         .attach_adapter = fscpos_attach_adapter,
108         .detach_client  = fscpos_detach_client,
109 };
110
111 /*
112  * Client data (each client gets its own)
113  */
114 struct fscpos_data {
115         struct i2c_client client;
116         struct semaphore update_lock;
117         char valid;             /* 0 until following fields are valid */
118         unsigned long last_updated;     /* In jiffies */
119
120         /* register values */
121         u8 revision;            /* revision of chip */
122         u8 global_event;        /* global event status */
123         u8 global_control;      /* global control register */
124         u8 wdog_control;        /* watchdog control */
125         u8 wdog_state;          /* watchdog status */
126         u8 wdog_preset;         /* watchdog preset */
127         u8 volt[3];             /* 12, 5, battery current */
128         u8 temp_act[3];         /* temperature */
129         u8 temp_status[3];      /* status of sensor */
130         u8 fan_act[3];          /* fans revolutions per second */
131         u8 fan_status[3];       /* fan status */
132         u8 pwm[2];              /* fan min value for rps */
133         u8 fan_ripple[3];       /* divider for rps */
134 };
135
136 /* Temperature */
137 #define TEMP_FROM_REG(val)      (((val) - 128) * 1000)
138
139 static ssize_t show_temp_input(struct fscpos_data *data, char *buf, int nr)
140 {
141         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[nr - 1]));
142 }
143
144 static ssize_t show_temp_status(struct fscpos_data *data, char *buf, int nr)
145 {
146         /* bits 2..7 reserved => mask with 0x03 */
147         return sprintf(buf, "%u\n", data->temp_status[nr - 1] & 0x03);
148 }
149
150 static ssize_t show_temp_reset(struct fscpos_data *data, char *buf, int nr)
151 {
152         return sprintf(buf, "1\n");
153 }
154
155 static ssize_t set_temp_reset(struct i2c_client *client, struct fscpos_data
156                         *data, const char *buf, size_t count, int nr, int reg)
157 {
158         unsigned long v = simple_strtoul(buf, NULL, 10);
159         if (v != 1) {
160                 dev_err(&client->dev, "temp_reset value %ld not supported. "
161                                         "Use 1 to reset the alarm!\n", v);
162                 return -EINVAL;
163         }
164
165         dev_info(&client->dev, "You used the temp_reset feature which has not "
166                                 "been proplerly tested. Please report your "
167                                 "experience to the module author.\n");
168
169         /* Supported value: 2 (clears the status) */
170         fscpos_write_value(client, FSCPOS_REG_TEMP_STATE[nr], 2);
171         return count;
172 }
173
174 /* Fans */
175 #define RPM_FROM_REG(val)       ((val) * 60)
176
177 static ssize_t show_fan_status(struct fscpos_data *data, char *buf, int nr)
178 {
179         /* bits 0..1, 3..7 reserved => mask with 0x04 */
180         return sprintf(buf, "%u\n", data->fan_status[nr - 1] & 0x04);
181 }
182
183 static ssize_t show_fan_input(struct fscpos_data *data, char *buf, int nr)
184 {
185         return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[nr - 1]));
186 }
187
188 static ssize_t show_fan_ripple(struct fscpos_data *data, char *buf, int nr)
189 {
190         /* bits 2..7 reserved => mask with 0x03 */
191         return sprintf(buf, "%u\n", data->fan_ripple[nr - 1] & 0x03);
192 }
193
194 static ssize_t set_fan_ripple(struct i2c_client *client, struct fscpos_data
195                         *data, const char *buf, size_t count, int nr, int reg)
196 {
197         /* supported values: 2, 4, 8 */
198         unsigned long v = simple_strtoul(buf, NULL, 10);
199
200         switch (v) {
201                 case 2: v = 1; break;
202                 case 4: v = 2; break;
203                 case 8: v = 3; break;
204         default:
205                 dev_err(&client->dev, "fan_ripple value %ld not supported. "
206                                         "Must be one of 2, 4 or 8!\n", v);
207                 return -EINVAL;
208         }
209         
210         down(&data->update_lock);
211         /* bits 2..7 reserved => mask with 0x03 */
212         data->fan_ripple[nr - 1] &= ~0x03;
213         data->fan_ripple[nr - 1] |= v;
214         
215         fscpos_write_value(client, reg, data->fan_ripple[nr - 1]);
216         up(&data->update_lock);
217         return count;
218 }
219
220 static ssize_t show_pwm(struct fscpos_data *data, char *buf, int nr)
221 {
222         return sprintf(buf, "%u\n", data->pwm[nr - 1]);
223 }
224
225 static ssize_t set_pwm(struct i2c_client *client, struct fscpos_data *data,
226                                 const char *buf, size_t count, int nr, int reg)
227 {
228         unsigned long v = simple_strtoul(buf, NULL, 10);
229
230         /* Range: 0..255 */
231         if (v < 0) v = 0;
232         if (v > 255) v = 255;
233
234         down(&data->update_lock);
235         data->pwm[nr - 1] = v;
236         fscpos_write_value(client, reg, data->pwm[nr - 1]);
237         up(&data->update_lock);
238         return count;
239 }
240
241 static void reset_fan_alarm(struct i2c_client *client, int nr)
242 {
243         fscpos_write_value(client, FSCPOS_REG_FAN_STATE[nr], 4);
244 }
245
246 /* Volts */
247 #define VOLT_FROM_REG(val, mult)        ((val) * (mult) / 255)
248
249 static ssize_t show_volt_12(struct device *dev, struct device_attribute *attr, char *buf)
250 {
251         struct fscpos_data *data = fscpos_update_device(dev);
252         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[0], 14200));
253 }
254
255 static ssize_t show_volt_5(struct device *dev, struct device_attribute *attr, char *buf)
256 {
257         struct fscpos_data *data = fscpos_update_device(dev);
258         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[1], 6600));
259 }
260
261 static ssize_t show_volt_batt(struct device *dev, struct device_attribute *attr, char *buf)
262 {
263         struct fscpos_data *data = fscpos_update_device(dev);
264         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[2], 3300));
265 }
266
267 /* Watchdog */
268 static ssize_t show_wdog_control(struct fscpos_data *data, char *buf)
269 {
270         /* bits 0..3 reserved, bit 6 write only => mask with 0xb0 */
271         return sprintf(buf, "%u\n", data->wdog_control & 0xb0);
272 }
273
274 static ssize_t set_wdog_control(struct i2c_client *client, struct fscpos_data
275                                 *data, const char *buf, size_t count, int reg)
276 {
277         /* bits 0..3 reserved => mask with 0xf0 */
278         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
279
280         down(&data->update_lock);
281         data->wdog_control &= ~0xf0;
282         data->wdog_control |= v;
283         fscpos_write_value(client, reg, data->wdog_control);
284         up(&data->update_lock);
285         return count;
286 }
287
288 static ssize_t show_wdog_state(struct fscpos_data *data, char *buf)
289 {
290         /* bits 0, 2..7 reserved => mask with 0x02 */
291         return sprintf(buf, "%u\n", data->wdog_state & 0x02);
292 }
293
294 static ssize_t set_wdog_state(struct i2c_client *client, struct fscpos_data
295                                 *data, const char *buf, size_t count, int reg)
296 {
297         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
298
299         /* Valid values: 2 (clear) */
300         if (v != 2) {
301                 dev_err(&client->dev, "wdog_state value %ld not supported. "
302                                         "Must be 2 to clear the state!\n", v);
303                 return -EINVAL;
304         }
305
306         down(&data->update_lock);
307         data->wdog_state &= ~v;
308         fscpos_write_value(client, reg, v);
309         up(&data->update_lock);
310         return count;
311 }
312
313 static ssize_t show_wdog_preset(struct fscpos_data *data, char *buf)
314 {
315         return sprintf(buf, "%u\n", data->wdog_preset);
316 }
317
318 static ssize_t set_wdog_preset(struct i2c_client *client, struct fscpos_data
319                                 *data, const char *buf, size_t count, int reg)
320 {
321         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
322
323         down(&data->update_lock);
324         data->wdog_preset = v;
325         fscpos_write_value(client, reg, data->wdog_preset);
326         up(&data->update_lock);
327         return count;
328 }
329
330 /* Event */
331 static ssize_t show_event(struct device *dev, struct device_attribute *attr, char *buf)
332 {
333         /* bits 5..7 reserved => mask with 0x1f */
334         struct fscpos_data *data = fscpos_update_device(dev);
335         return sprintf(buf, "%u\n", data->global_event & 0x9b);
336 }
337
338 /*
339  * Sysfs stuff
340  */
341 #define create_getter(kind, sub) \
342         static ssize_t sysfs_show_##kind##sub(struct device *dev, struct device_attribute *attr, char *buf) \
343         { \
344                 struct fscpos_data *data = fscpos_update_device(dev); \
345                 return show_##kind##sub(data, buf); \
346         }
347
348 #define create_getter_n(kind, offset, sub) \
349         static ssize_t sysfs_show_##kind##offset##sub(struct device *dev, struct device_attribute *attr, char\
350                                                                         *buf) \
351         { \
352                 struct fscpos_data *data = fscpos_update_device(dev); \
353                 return show_##kind##sub(data, buf, offset); \
354         }
355
356 #define create_setter(kind, sub, reg) \
357         static ssize_t sysfs_set_##kind##sub (struct device *dev, struct device_attribute *attr, const char \
358                                                         *buf, size_t count) \
359         { \
360                 struct i2c_client *client = to_i2c_client(dev); \
361                 struct fscpos_data *data = i2c_get_clientdata(client); \
362                 return set_##kind##sub(client, data, buf, count, reg); \
363         }
364
365 #define create_setter_n(kind, offset, sub, reg) \
366         static ssize_t sysfs_set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, \
367                                         const char *buf, size_t count) \
368         { \
369                 struct i2c_client *client = to_i2c_client(dev); \
370                 struct fscpos_data *data = i2c_get_clientdata(client); \
371                 return set_##kind##sub(client, data, buf, count, offset, reg);\
372         }
373
374 #define create_sysfs_device_ro(kind, sub, offset) \
375         static DEVICE_ATTR(kind##offset##sub, S_IRUGO, \
376                                         sysfs_show_##kind##offset##sub, NULL);
377
378 #define create_sysfs_device_rw(kind, sub, offset) \
379         static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, \
380                 sysfs_show_##kind##offset##sub, sysfs_set_##kind##offset##sub);
381
382 #define sysfs_ro_n(kind, sub, offset) \
383         create_getter_n(kind, offset, sub); \
384         create_sysfs_device_ro(kind, sub, offset);
385
386 #define sysfs_rw_n(kind, sub, offset, reg) \
387         create_getter_n(kind, offset, sub); \
388         create_setter_n(kind, offset, sub, reg); \
389         create_sysfs_device_rw(kind, sub, offset);
390
391 #define sysfs_rw(kind, sub, reg) \
392         create_getter(kind, sub); \
393         create_setter(kind, sub, reg); \
394         create_sysfs_device_rw(kind, sub,);
395
396 #define sysfs_fan_with_min(offset, reg_status, reg_ripple, reg_min) \
397         sysfs_fan(offset, reg_status, reg_ripple); \
398         sysfs_rw_n(pwm,, offset, reg_min);
399
400 #define sysfs_fan(offset, reg_status, reg_ripple) \
401         sysfs_ro_n(fan, _input, offset); \
402         sysfs_ro_n(fan, _status, offset); \
403         sysfs_rw_n(fan, _ripple, offset, reg_ripple);
404
405 #define sysfs_temp(offset, reg_status) \
406         sysfs_ro_n(temp, _input, offset); \
407         sysfs_ro_n(temp, _status, offset); \
408         sysfs_rw_n(temp, _reset, offset, reg_status);
409
410 #define sysfs_watchdog(reg_wdog_preset, reg_wdog_state, reg_wdog_control) \
411         sysfs_rw(wdog, _control, reg_wdog_control); \
412         sysfs_rw(wdog, _preset, reg_wdog_preset); \
413         sysfs_rw(wdog, _state, reg_wdog_state);
414
415 sysfs_fan_with_min(1, FSCPOS_REG_FAN_STATE[0], FSCPOS_REG_FAN_RIPPLE[0],
416                                                         FSCPOS_REG_PWM[0]);
417 sysfs_fan_with_min(2, FSCPOS_REG_FAN_STATE[1], FSCPOS_REG_FAN_RIPPLE[1],
418                                                         FSCPOS_REG_PWM[1]);
419 sysfs_fan(3, FSCPOS_REG_FAN_STATE[2], FSCPOS_REG_FAN_RIPPLE[2]);
420
421 sysfs_temp(1, FSCPOS_REG_TEMP_STATE[0]);
422 sysfs_temp(2, FSCPOS_REG_TEMP_STATE[1]);
423 sysfs_temp(3, FSCPOS_REG_TEMP_STATE[2]);
424
425 sysfs_watchdog(FSCPOS_REG_WDOG_PRESET, FSCPOS_REG_WDOG_STATE,
426                                                 FSCPOS_REG_WDOG_CONTROL);
427
428 static DEVICE_ATTR(event, S_IRUGO, show_event, NULL);
429 static DEVICE_ATTR(in0_input, S_IRUGO, show_volt_12, NULL);
430 static DEVICE_ATTR(in1_input, S_IRUGO, show_volt_5, NULL);
431 static DEVICE_ATTR(in2_input, S_IRUGO, show_volt_batt, NULL);
432
433 static int fscpos_attach_adapter(struct i2c_adapter *adapter)
434 {
435         if (!(adapter->class & I2C_CLASS_HWMON))
436                 return 0;
437         return i2c_detect(adapter, &addr_data, fscpos_detect);
438 }
439
440 int fscpos_detect(struct i2c_adapter *adapter, int address, int kind)
441 {
442         struct i2c_client *new_client;
443         struct fscpos_data *data;
444         int err = 0;
445
446         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
447                 goto exit;
448
449         /*
450          * OK. For now, we presume we have a valid client. We now create the
451          * client structure, even though we cannot fill it completely yet.
452          * But it allows us to access fscpos_{read,write}_value.
453          */
454
455         if (!(data = kmalloc(sizeof(struct fscpos_data), GFP_KERNEL))) {
456                 err = -ENOMEM;
457                 goto exit;
458         }
459         memset(data, 0, sizeof(struct fscpos_data));
460
461         new_client = &data->client;
462         i2c_set_clientdata(new_client, data);
463         new_client->addr = address;
464         new_client->adapter = adapter;
465         new_client->driver = &fscpos_driver;
466         new_client->flags = 0;
467
468         /* Do the remaining detection unless force or force_fscpos parameter */
469         if (kind < 0) {
470                 if ((fscpos_read_value(new_client, FSCPOS_REG_IDENT_0)
471                         != 0x50) /* 'P' */
472                 || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_1)
473                         != 0x45) /* 'E' */
474                 || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_2)
475                         != 0x47))/* 'G' */
476                 {
477                         dev_dbg(&new_client->dev, "fscpos detection failed\n");
478                         goto exit_free;
479                 }
480         }
481
482         /* Fill in the remaining client fields and put it in the global list */
483         strlcpy(new_client->name, "fscpos", I2C_NAME_SIZE);
484
485         data->valid = 0;
486         init_MUTEX(&data->update_lock);
487
488         /* Tell the I2C layer a new client has arrived */
489         if ((err = i2c_attach_client(new_client)))
490                 goto exit_free;
491
492         /* Inizialize the fscpos chip */
493         fscpos_init_client(new_client);
494
495         /* Announce that the chip was found */
496         dev_info(&new_client->dev, "Found fscpos chip, rev %u\n", data->revision);
497
498         /* Register sysfs hooks */
499         device_create_file(&new_client->dev, &dev_attr_event);
500         device_create_file(&new_client->dev, &dev_attr_in0_input);
501         device_create_file(&new_client->dev, &dev_attr_in1_input);
502         device_create_file(&new_client->dev, &dev_attr_in2_input);
503         device_create_file(&new_client->dev, &dev_attr_wdog_control);
504         device_create_file(&new_client->dev, &dev_attr_wdog_preset);
505         device_create_file(&new_client->dev, &dev_attr_wdog_state);
506         device_create_file(&new_client->dev, &dev_attr_temp1_input);
507         device_create_file(&new_client->dev, &dev_attr_temp1_status);
508         device_create_file(&new_client->dev, &dev_attr_temp1_reset);
509         device_create_file(&new_client->dev, &dev_attr_temp2_input);
510         device_create_file(&new_client->dev, &dev_attr_temp2_status);
511         device_create_file(&new_client->dev, &dev_attr_temp2_reset);
512         device_create_file(&new_client->dev, &dev_attr_temp3_input);
513         device_create_file(&new_client->dev, &dev_attr_temp3_status);
514         device_create_file(&new_client->dev, &dev_attr_temp3_reset);
515         device_create_file(&new_client->dev, &dev_attr_fan1_input);
516         device_create_file(&new_client->dev, &dev_attr_fan1_status);
517         device_create_file(&new_client->dev, &dev_attr_fan1_ripple);
518         device_create_file(&new_client->dev, &dev_attr_pwm1);
519         device_create_file(&new_client->dev, &dev_attr_fan2_input);
520         device_create_file(&new_client->dev, &dev_attr_fan2_status);
521         device_create_file(&new_client->dev, &dev_attr_fan2_ripple);
522         device_create_file(&new_client->dev, &dev_attr_pwm2);
523         device_create_file(&new_client->dev, &dev_attr_fan3_input);
524         device_create_file(&new_client->dev, &dev_attr_fan3_status);
525         device_create_file(&new_client->dev, &dev_attr_fan3_ripple);
526
527         return 0;
528
529 exit_free:
530         kfree(data);
531 exit:
532         return err;
533 }
534
535 static int fscpos_detach_client(struct i2c_client *client)
536 {
537         int err;
538
539         if ((err = i2c_detach_client(client))) {
540                 dev_err(&client->dev, "Client deregistration failed, client"
541                                                         " not detached.\n");
542                 return err;
543         }
544         kfree(i2c_get_clientdata(client));
545         return 0;
546 }
547
548 static int fscpos_read_value(struct i2c_client *client, u8 reg)
549 {
550         dev_dbg(&client->dev, "Read reg 0x%02x\n", reg);
551         return i2c_smbus_read_byte_data(client, reg);
552 }
553
554 static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value)
555 {
556         dev_dbg(&client->dev, "Write reg 0x%02x, val 0x%02x\n", reg, value);
557         return i2c_smbus_write_byte_data(client, reg, value);
558 }
559
560 /* Called when we have found a new FSCPOS chip */
561 static void fscpos_init_client(struct i2c_client *client)
562 {
563         struct fscpos_data *data = i2c_get_clientdata(client);
564
565         /* read revision from chip */
566         data->revision = fscpos_read_value(client, FSCPOS_REG_REVISION);
567 }
568
569 static struct fscpos_data *fscpos_update_device(struct device *dev)
570 {
571         struct i2c_client *client = to_i2c_client(dev);
572         struct fscpos_data *data = i2c_get_clientdata(client);
573
574         down(&data->update_lock);
575
576         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
577                 int i;
578
579                 dev_dbg(&client->dev, "Starting fscpos update\n");
580
581                 for (i = 0; i < 3; i++) {
582                         data->temp_act[i] = fscpos_read_value(client,
583                                                 FSCPOS_REG_TEMP_ACT[i]);
584                         data->temp_status[i] = fscpos_read_value(client,
585                                                 FSCPOS_REG_TEMP_STATE[i]);
586                         data->fan_act[i] = fscpos_read_value(client,
587                                                 FSCPOS_REG_FAN_ACT[i]);
588                         data->fan_status[i] = fscpos_read_value(client,
589                                                 FSCPOS_REG_FAN_STATE[i]);
590                         data->fan_ripple[i] = fscpos_read_value(client,
591                                                 FSCPOS_REG_FAN_RIPPLE[i]);
592                         if (i < 2) {
593                                 /* fan2_min is not supported by the chip */
594                                 data->pwm[i] = fscpos_read_value(client,
595                                                         FSCPOS_REG_PWM[i]);
596                         }
597                         /* reset fan status if speed is back to > 0 */
598                         if (data->fan_status[i] != 0 && data->fan_act[i] > 0) {
599                                 reset_fan_alarm(client, i);
600                         }
601                 }
602
603                 data->volt[0] = fscpos_read_value(client, FSCPOS_REG_VOLT_12);
604                 data->volt[1] = fscpos_read_value(client, FSCPOS_REG_VOLT_5);
605                 data->volt[2] = fscpos_read_value(client, FSCPOS_REG_VOLT_BATT);
606
607                 data->wdog_preset = fscpos_read_value(client,
608                                                         FSCPOS_REG_WDOG_PRESET);
609                 data->wdog_state = fscpos_read_value(client,
610                                                         FSCPOS_REG_WDOG_STATE);
611                 data->wdog_control = fscpos_read_value(client,
612                                                 FSCPOS_REG_WDOG_CONTROL);
613
614                 data->global_event = fscpos_read_value(client,
615                                                 FSCPOS_REG_EVENT_STATE);
616
617                 data->last_updated = jiffies;
618                 data->valid = 1;
619         }
620         up(&data->update_lock);
621         return data;
622 }
623
624 static int __init sm_fscpos_init(void)
625 {
626         return i2c_add_driver(&fscpos_driver);
627 }
628
629 static void __exit sm_fscpos_exit(void)
630 {
631         i2c_del_driver(&fscpos_driver);
632 }
633
634 MODULE_AUTHOR("Stefan Ott <stefan@desire.ch> based on work from Hermann Jung "
635                                 "<hej@odn.de>, Frodo Looijaard <frodol@dds.nl>"
636                                 " and Philip Edelbrock <phil@netroedge.com>");
637 MODULE_DESCRIPTION("fujitsu siemens poseidon chip driver");
638 MODULE_LICENSE("GPL");
639
640 module_init(sm_fscpos_init);
641 module_exit(sm_fscpos_exit);