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Merge branch 'sis900-wol'
[mirror_ubuntu-zesty-kernel.git] / drivers / hwmon / fscpos.c
CommitLineData
1da177e4
LT		 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>
0cacdf29 35#include <linux/jiffies.h>
1da177e4 36#include <linux/i2c.h>
1da177e4 37#include <linux/init.h>
943b0830
MH		 38#include <linux/hwmon.h>
39#include <linux/err.h>
1da177e4
LT		 40
41/*
42 * Addresses to scan
43 */
44static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
1da177e4
LT		 45
46/*
47 * Insmod parameters
48 */
f4b50261 49I2C_CLIENT_INSMOD_1(fscpos);
1da177e4
LT		 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 */
76static u8 FSCPOS_REG_PWM[] = { 0x55, 0x65 };
77static u8 FSCPOS_REG_FAN_ACT[] = { 0x0e, 0x6b, 0xab };
78static u8 FSCPOS_REG_FAN_STATE[] = { 0x0d, 0x62, 0xa2 };
79static u8 FSCPOS_REG_FAN_RIPPLE[] = { 0x0f, 0x6f, 0xaf };
80
81/* temperatures */
82static u8 FSCPOS_REG_TEMP_ACT[] = { 0x64, 0x32, 0x35 };
83static u8 FSCPOS_REG_TEMP_STATE[] = { 0x71, 0x81, 0x91 };
84
85/*
86 * Functions declaration
87 */
88static int fscpos_attach_adapter(struct i2c_adapter *adapter);
89static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind);
90static int fscpos_detach_client(struct i2c_client *client);
91
92static int fscpos_read_value(struct i2c_client *client, u8 register);
93static int fscpos_write_value(struct i2c_client *client, u8 register, u8 value);
94static struct fscpos_data *fscpos_update_device(struct device *dev);
95static void fscpos_init_client(struct i2c_client *client);
96
97static void reset_fan_alarm(struct i2c_client *client, int nr);
98
99/*
100 * Driver data (common to all clients)
101 */
102static 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 */
114struct fscpos_data {
115 struct i2c_client client;
943b0830 116 struct class_device *class_dev;
1da177e4
LT		 117 struct semaphore update_lock;
118 char valid; /* 0 until following fields are valid */
119 unsigned long last_updated; /* In jiffies */
120
121 /* register values */
122 u8 revision; /* revision of chip */
123 u8 global_event; /* global event status */
124 u8 global_control; /* global control register */
125 u8 wdog_control; /* watchdog control */
126 u8 wdog_state; /* watchdog status */
127 u8 wdog_preset; /* watchdog preset */
128 u8 volt[3]; /* 12, 5, battery current */
129 u8 temp_act[3]; /* temperature */
130 u8 temp_status[3]; /* status of sensor */
131 u8 fan_act[3]; /* fans revolutions per second */
132 u8 fan_status[3]; /* fan status */
133 u8 pwm[2]; /* fan min value for rps */
134 u8 fan_ripple[3]; /* divider for rps */
135};
136
137/* Temperature */
138#define TEMP_FROM_REG(val) (((val) - 128) * 1000)
139
140static ssize_t show_temp_input(struct fscpos_data *data, char *buf, int nr)
141{
142 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[nr - 1]));
143}
144
145static ssize_t show_temp_status(struct fscpos_data *data, char *buf, int nr)
146{
147 /* bits 2..7 reserved => mask with 0x03 */
148 return sprintf(buf, "%u\n", data->temp_status[nr - 1] & 0x03);
149}
150
151static ssize_t show_temp_reset(struct fscpos_data *data, char *buf, int nr)
152{
153 return sprintf(buf, "1\n");
154}
155
156static ssize_t set_temp_reset(struct i2c_client *client, struct fscpos_data
157 *data, const char *buf, size_t count, int nr, int reg)
158{
159 unsigned long v = simple_strtoul(buf, NULL, 10);
160 if (v != 1) {
161 dev_err(&client->dev, "temp_reset value %ld not supported. "
162 "Use 1 to reset the alarm!\n", v);
163 return -EINVAL;
164 }
165
166 dev_info(&client->dev, "You used the temp_reset feature which has not "
167 "been proplerly tested. Please report your "
168 "experience to the module author.\n");
169
170 /* Supported value: 2 (clears the status) */
3fd1bb9b 171 fscpos_write_value(client, FSCPOS_REG_TEMP_STATE[nr - 1], 2);
1da177e4
LT		 172 return count;
173}
174
175/* Fans */
176#define RPM_FROM_REG(val) ((val) * 60)
177
178static ssize_t show_fan_status(struct fscpos_data *data, char *buf, int nr)
179{
180 /* bits 0..1, 3..7 reserved => mask with 0x04 */
181 return sprintf(buf, "%u\n", data->fan_status[nr - 1] & 0x04);
182}
183
184static ssize_t show_fan_input(struct fscpos_data *data, char *buf, int nr)
185{
186 return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[nr - 1]));
187}
188
189static ssize_t show_fan_ripple(struct fscpos_data *data, char *buf, int nr)
190{
191 /* bits 2..7 reserved => mask with 0x03 */
192 return sprintf(buf, "%u\n", data->fan_ripple[nr - 1] & 0x03);
193}
194
195static ssize_t set_fan_ripple(struct i2c_client *client, struct fscpos_data
196 *data, const char *buf, size_t count, int nr, int reg)
197{
198 /* supported values: 2, 4, 8 */
199 unsigned long v = simple_strtoul(buf, NULL, 10);
200
201 switch (v) {
202 case 2: v = 1; break;
203 case 4: v = 2; break;
204 case 8: v = 3; break;
205 default:
206 dev_err(&client->dev, "fan_ripple value %ld not supported. "
207 "Must be one of 2, 4 or 8!\n", v);
208 return -EINVAL;
209 }
210
211 down(&data->update_lock);
212 /* bits 2..7 reserved => mask with 0x03 */
213 data->fan_ripple[nr - 1] &= ~0x03;
214 data->fan_ripple[nr - 1] |= v;
215
216 fscpos_write_value(client, reg, data->fan_ripple[nr - 1]);
217 up(&data->update_lock);
218 return count;
219}
220
221static ssize_t show_pwm(struct fscpos_data *data, char *buf, int nr)
222{
223 return sprintf(buf, "%u\n", data->pwm[nr - 1]);
224}
225
226static ssize_t set_pwm(struct i2c_client *client, struct fscpos_data *data,
227 const char *buf, size_t count, int nr, int reg)
228{
229 unsigned long v = simple_strtoul(buf, NULL, 10);
230
231 /* Range: 0..255 */
232 if (v < 0) v = 0;
233 if (v > 255) v = 255;
234
235 down(&data->update_lock);
236 data->pwm[nr - 1] = v;
237 fscpos_write_value(client, reg, data->pwm[nr - 1]);
238 up(&data->update_lock);
239 return count;
240}
241
242static void reset_fan_alarm(struct i2c_client *client, int nr)
243{
244 fscpos_write_value(client, FSCPOS_REG_FAN_STATE[nr], 4);
245}
246
247/* Volts */
248#define VOLT_FROM_REG(val, mult) ((val) * (mult) / 255)
249
30f74292 250static ssize_t show_volt_12(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 251{
252 struct fscpos_data *data = fscpos_update_device(dev);
253 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[0], 14200));
254}
255
30f74292 256static ssize_t show_volt_5(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 257{
258 struct fscpos_data *data = fscpos_update_device(dev);
259 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[1], 6600));
260}
261
30f74292 262static ssize_t show_volt_batt(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 263{
264 struct fscpos_data *data = fscpos_update_device(dev);
265 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[2], 3300));
266}
267
268/* Watchdog */
269static ssize_t show_wdog_control(struct fscpos_data *data, char *buf)
270{
271 /* bits 0..3 reserved, bit 6 write only => mask with 0xb0 */
272 return sprintf(buf, "%u\n", data->wdog_control & 0xb0);
273}
274
275static ssize_t set_wdog_control(struct i2c_client *client, struct fscpos_data
276 *data, const char *buf, size_t count, int reg)
277{
278 /* bits 0..3 reserved => mask with 0xf0 */
279 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
280
281 down(&data->update_lock);
282 data->wdog_control &= ~0xf0;
283 data->wdog_control |= v;
284 fscpos_write_value(client, reg, data->wdog_control);
285 up(&data->update_lock);
286 return count;
287}
288
289static ssize_t show_wdog_state(struct fscpos_data *data, char *buf)
290{
291 /* bits 0, 2..7 reserved => mask with 0x02 */
292 return sprintf(buf, "%u\n", data->wdog_state & 0x02);
293}
294
295static ssize_t set_wdog_state(struct i2c_client *client, struct fscpos_data
296 *data, const char *buf, size_t count, int reg)
297{
298 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
299
300 /* Valid values: 2 (clear) */
301 if (v != 2) {
302 dev_err(&client->dev, "wdog_state value %ld not supported. "
303 "Must be 2 to clear the state!\n", v);
304 return -EINVAL;
305 }
306
307 down(&data->update_lock);
308 data->wdog_state &= ~v;
309 fscpos_write_value(client, reg, v);
310 up(&data->update_lock);
311 return count;
312}
313
314static ssize_t show_wdog_preset(struct fscpos_data *data, char *buf)
315{
316 return sprintf(buf, "%u\n", data->wdog_preset);
317}
318
319static ssize_t set_wdog_preset(struct i2c_client *client, struct fscpos_data
320 *data, const char *buf, size_t count, int reg)
321{
322 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
323
324 down(&data->update_lock);
325 data->wdog_preset = v;
326 fscpos_write_value(client, reg, data->wdog_preset);
327 up(&data->update_lock);
328 return count;
329}
330
331/* Event */
30f74292 332static ssize_t show_event(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 333{
334 /* bits 5..7 reserved => mask with 0x1f */
335 struct fscpos_data *data = fscpos_update_device(dev);
336 return sprintf(buf, "%u\n", data->global_event & 0x9b);
337}
338
339/*
340 * Sysfs stuff
341 */
342#define create_getter(kind, sub) \
30f74292 343 static ssize_t sysfs_show_##kind##sub(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 344 { \
345 struct fscpos_data *data = fscpos_update_device(dev); \
346 return show_##kind##sub(data, buf); \
347 }
348
349#define create_getter_n(kind, offset, sub) \
30f74292 350 static ssize_t sysfs_show_##kind##offset##sub(struct device *dev, struct device_attribute *attr, char\
1da177e4
LT		 351 *buf) \
352 { \
353 struct fscpos_data *data = fscpos_update_device(dev); \
354 return show_##kind##sub(data, buf, offset); \
355 }
356
357#define create_setter(kind, sub, reg) \
30f74292 358 static ssize_t sysfs_set_##kind##sub (struct device *dev, struct device_attribute *attr, const char \
1da177e4
LT		 359 *buf, size_t count) \
360 { \
361 struct i2c_client *client = to_i2c_client(dev); \
362 struct fscpos_data *data = i2c_get_clientdata(client); \
363 return set_##kind##sub(client, data, buf, count, reg); \
364 }
365
366#define create_setter_n(kind, offset, sub, reg) \
30f74292 367 static ssize_t sysfs_set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, \
1da177e4
LT		 368 const char *buf, size_t count) \
369 { \
370 struct i2c_client *client = to_i2c_client(dev); \
371 struct fscpos_data *data = i2c_get_clientdata(client); \
372 return set_##kind##sub(client, data, buf, count, offset, reg);\
373 }
374
375#define create_sysfs_device_ro(kind, sub, offset) \
376 static DEVICE_ATTR(kind##offset##sub, S_IRUGO, \
377 sysfs_show_##kind##offset##sub, NULL);
378
379#define create_sysfs_device_rw(kind, sub, offset) \
380 static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, \
381 sysfs_show_##kind##offset##sub, sysfs_set_##kind##offset##sub);
382
383#define sysfs_ro_n(kind, sub, offset) \
384 create_getter_n(kind, offset, sub); \
385 create_sysfs_device_ro(kind, sub, offset);
386
387#define sysfs_rw_n(kind, sub, offset, reg) \
388 create_getter_n(kind, offset, sub); \
389 create_setter_n(kind, offset, sub, reg); \
390 create_sysfs_device_rw(kind, sub, offset);
391
392#define sysfs_rw(kind, sub, reg) \
393 create_getter(kind, sub); \
394 create_setter(kind, sub, reg); \
395 create_sysfs_device_rw(kind, sub,);
396
397#define sysfs_fan_with_min(offset, reg_status, reg_ripple, reg_min) \
398 sysfs_fan(offset, reg_status, reg_ripple); \
399 sysfs_rw_n(pwm,, offset, reg_min);
400
401#define sysfs_fan(offset, reg_status, reg_ripple) \
402 sysfs_ro_n(fan, _input, offset); \
403 sysfs_ro_n(fan, _status, offset); \
404 sysfs_rw_n(fan, _ripple, offset, reg_ripple);
405
406#define sysfs_temp(offset, reg_status) \
407 sysfs_ro_n(temp, _input, offset); \
408 sysfs_ro_n(temp, _status, offset); \
409 sysfs_rw_n(temp, _reset, offset, reg_status);
410
411#define sysfs_watchdog(reg_wdog_preset, reg_wdog_state, reg_wdog_control) \
412 sysfs_rw(wdog, _control, reg_wdog_control); \
413 sysfs_rw(wdog, _preset, reg_wdog_preset); \
414 sysfs_rw(wdog, _state, reg_wdog_state);
415
416sysfs_fan_with_min(1, FSCPOS_REG_FAN_STATE[0], FSCPOS_REG_FAN_RIPPLE[0],
417 FSCPOS_REG_PWM[0]);
418sysfs_fan_with_min(2, FSCPOS_REG_FAN_STATE[1], FSCPOS_REG_FAN_RIPPLE[1],
419 FSCPOS_REG_PWM[1]);
420sysfs_fan(3, FSCPOS_REG_FAN_STATE[2], FSCPOS_REG_FAN_RIPPLE[2]);
421
422sysfs_temp(1, FSCPOS_REG_TEMP_STATE[0]);
423sysfs_temp(2, FSCPOS_REG_TEMP_STATE[1]);
424sysfs_temp(3, FSCPOS_REG_TEMP_STATE[2]);
425
426sysfs_watchdog(FSCPOS_REG_WDOG_PRESET, FSCPOS_REG_WDOG_STATE,
427 FSCPOS_REG_WDOG_CONTROL);
428
429static DEVICE_ATTR(event, S_IRUGO, show_event, NULL);
430static DEVICE_ATTR(in0_input, S_IRUGO, show_volt_12, NULL);
431static DEVICE_ATTR(in1_input, S_IRUGO, show_volt_5, NULL);
432static DEVICE_ATTR(in2_input, S_IRUGO, show_volt_batt, NULL);
433
434static int fscpos_attach_adapter(struct i2c_adapter *adapter)
435{
436 if (!(adapter->class & I2C_CLASS_HWMON))
437 return 0;
2ed2dc3c 438 return i2c_probe(adapter, &addr_data, fscpos_detect);
1da177e4
LT		 439}
440
c49efcef 441static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind)
1da177e4
LT		 442{
443 struct i2c_client *new_client;
444 struct fscpos_data *data;
445 int err = 0;
446
447 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
448 goto exit;
449
450 /*
451 * OK. For now, we presume we have a valid client. We now create the
452 * client structure, even though we cannot fill it completely yet.
453 * But it allows us to access fscpos_{read,write}_value.
454 */
455
ba9c2e8d 456 if (!(data = kzalloc(sizeof(struct fscpos_data), GFP_KERNEL))) {
1da177e4
LT		 457 err = -ENOMEM;
458 goto exit;
459 }
1da177e4
LT		 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 */
943b0830
MH		 499 data->class_dev = hwmon_device_register(&new_client->dev);
500 if (IS_ERR(data->class_dev)) {
501 err = PTR_ERR(data->class_dev);
502 goto exit_detach;
503 }
504
1da177e4
LT		 505 device_create_file(&new_client->dev, &dev_attr_event);
506 device_create_file(&new_client->dev, &dev_attr_in0_input);
507 device_create_file(&new_client->dev, &dev_attr_in1_input);
508 device_create_file(&new_client->dev, &dev_attr_in2_input);
509 device_create_file(&new_client->dev, &dev_attr_wdog_control);
510 device_create_file(&new_client->dev, &dev_attr_wdog_preset);
511 device_create_file(&new_client->dev, &dev_attr_wdog_state);
512 device_create_file(&new_client->dev, &dev_attr_temp1_input);
513 device_create_file(&new_client->dev, &dev_attr_temp1_status);
514 device_create_file(&new_client->dev, &dev_attr_temp1_reset);
515 device_create_file(&new_client->dev, &dev_attr_temp2_input);
516 device_create_file(&new_client->dev, &dev_attr_temp2_status);
517 device_create_file(&new_client->dev, &dev_attr_temp2_reset);
518 device_create_file(&new_client->dev, &dev_attr_temp3_input);
519 device_create_file(&new_client->dev, &dev_attr_temp3_status);
520 device_create_file(&new_client->dev, &dev_attr_temp3_reset);
521 device_create_file(&new_client->dev, &dev_attr_fan1_input);
522 device_create_file(&new_client->dev, &dev_attr_fan1_status);
523 device_create_file(&new_client->dev, &dev_attr_fan1_ripple);
524 device_create_file(&new_client->dev, &dev_attr_pwm1);
525 device_create_file(&new_client->dev, &dev_attr_fan2_input);
526 device_create_file(&new_client->dev, &dev_attr_fan2_status);
527 device_create_file(&new_client->dev, &dev_attr_fan2_ripple);
528 device_create_file(&new_client->dev, &dev_attr_pwm2);
529 device_create_file(&new_client->dev, &dev_attr_fan3_input);
530 device_create_file(&new_client->dev, &dev_attr_fan3_status);
531 device_create_file(&new_client->dev, &dev_attr_fan3_ripple);
532
533 return 0;
534
943b0830
MH		 535exit_detach:
536 i2c_detach_client(new_client);
1da177e4
LT		 537exit_free:
538 kfree(data);
539exit:
540 return err;
541}
542
543static int fscpos_detach_client(struct i2c_client *client)
544{
943b0830 545 struct fscpos_data *data = i2c_get_clientdata(client);
1da177e4
LT		 546 int err;
547
943b0830
MH		 548 hwmon_device_unregister(data->class_dev);
549
7bef5594 550 if ((err = i2c_detach_client(client)))
1da177e4 551 return err;
943b0830 552 kfree(data);
1da177e4
LT		 553 return 0;
554}
555
556static int fscpos_read_value(struct i2c_client *client, u8 reg)
557{
558 dev_dbg(&client->dev, "Read reg 0x%02x\n", reg);
559 return i2c_smbus_read_byte_data(client, reg);
560}
561
562static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value)
563{
564 dev_dbg(&client->dev, "Write reg 0x%02x, val 0x%02x\n", reg, value);
565 return i2c_smbus_write_byte_data(client, reg, value);
566}
567
568/* Called when we have found a new FSCPOS chip */
569static void fscpos_init_client(struct i2c_client *client)
570{
571 struct fscpos_data *data = i2c_get_clientdata(client);
572
573 /* read revision from chip */
574 data->revision = fscpos_read_value(client, FSCPOS_REG_REVISION);
575}
576
577static struct fscpos_data *fscpos_update_device(struct device *dev)
578{
579 struct i2c_client *client = to_i2c_client(dev);
580 struct fscpos_data *data = i2c_get_clientdata(client);
581
582 down(&data->update_lock);
583
0cacdf29 584 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
1da177e4
LT		 585 int i;
586
587 dev_dbg(&client->dev, "Starting fscpos update\n");
588
589 for (i = 0; i < 3; i++) {
590 data->temp_act[i] = fscpos_read_value(client,
591 FSCPOS_REG_TEMP_ACT[i]);
592 data->temp_status[i] = fscpos_read_value(client,
593 FSCPOS_REG_TEMP_STATE[i]);
594 data->fan_act[i] = fscpos_read_value(client,
595 FSCPOS_REG_FAN_ACT[i]);
596 data->fan_status[i] = fscpos_read_value(client,
597 FSCPOS_REG_FAN_STATE[i]);
598 data->fan_ripple[i] = fscpos_read_value(client,
599 FSCPOS_REG_FAN_RIPPLE[i]);
600 if (i < 2) {
601 /* fan2_min is not supported by the chip */
602 data->pwm[i] = fscpos_read_value(client,
603 FSCPOS_REG_PWM[i]);
604 }
605 /* reset fan status if speed is back to > 0 */
606 if (data->fan_status[i] != 0 && data->fan_act[i] > 0) {
607 reset_fan_alarm(client, i);
608 }
609 }
610
611 data->volt[0] = fscpos_read_value(client, FSCPOS_REG_VOLT_12);
612 data->volt[1] = fscpos_read_value(client, FSCPOS_REG_VOLT_5);
613 data->volt[2] = fscpos_read_value(client, FSCPOS_REG_VOLT_BATT);
614
615 data->wdog_preset = fscpos_read_value(client,
616 FSCPOS_REG_WDOG_PRESET);
617 data->wdog_state = fscpos_read_value(client,
618 FSCPOS_REG_WDOG_STATE);
619 data->wdog_control = fscpos_read_value(client,
620 FSCPOS_REG_WDOG_CONTROL);
621
622 data->global_event = fscpos_read_value(client,
623 FSCPOS_REG_EVENT_STATE);
624
625 data->last_updated = jiffies;
626 data->valid = 1;
627 }
628 up(&data->update_lock);
629 return data;
630}
631
632static int __init sm_fscpos_init(void)
633{
634 return i2c_add_driver(&fscpos_driver);
635}
636
637static void __exit sm_fscpos_exit(void)
638{
639 i2c_del_driver(&fscpos_driver);
640}
641
642MODULE_AUTHOR("Stefan Ott <stefan@desire.ch> based on work from Hermann Jung "
643 "<hej@odn.de>, Frodo Looijaard <frodol@dds.nl>"
644 " and Philip Edelbrock <phil@netroedge.com>");
645MODULE_DESCRIPTION("fujitsu siemens poseidon chip driver");
646MODULE_LICENSE("GPL");
647
648module_init(sm_fscpos_init);
649module_exit(sm_fscpos_exit);
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