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Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
[linux-2.6-block.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>
9a61bf63 40#include <linux/mutex.h>
87808be4 41#include <linux/sysfs.h>
1da177e4
LT		 42
43/*
44 * Addresses to scan
45 */
25e9c86d 46static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
1da177e4
LT		 47
48/*
49 * Insmod parameters
50 */
f4b50261 51I2C_CLIENT_INSMOD_1(fscpos);
1da177e4
LT		 52
53/*
54 * The FSCPOS registers
55 */
56
57/* chip identification */
58#define FSCPOS_REG_IDENT_0 0x00
59#define FSCPOS_REG_IDENT_1 0x01
60#define FSCPOS_REG_IDENT_2 0x02
61#define FSCPOS_REG_REVISION 0x03
62
63/* global control and status */
64#define FSCPOS_REG_EVENT_STATE 0x04
65#define FSCPOS_REG_CONTROL 0x05
66
67/* watchdog */
68#define FSCPOS_REG_WDOG_PRESET 0x28
69#define FSCPOS_REG_WDOG_STATE 0x23
70#define FSCPOS_REG_WDOG_CONTROL 0x21
71
72/* voltages */
73#define FSCPOS_REG_VOLT_12 0x45
74#define FSCPOS_REG_VOLT_5 0x42
75#define FSCPOS_REG_VOLT_BATT 0x48
76
77/* fans - the chip does not support minimum speed for fan2 */
78static u8 FSCPOS_REG_PWM[] = { 0x55, 0x65 };
79static u8 FSCPOS_REG_FAN_ACT[] = { 0x0e, 0x6b, 0xab };
80static u8 FSCPOS_REG_FAN_STATE[] = { 0x0d, 0x62, 0xa2 };
81static u8 FSCPOS_REG_FAN_RIPPLE[] = { 0x0f, 0x6f, 0xaf };
82
83/* temperatures */
84static u8 FSCPOS_REG_TEMP_ACT[] = { 0x64, 0x32, 0x35 };
85static u8 FSCPOS_REG_TEMP_STATE[] = { 0x71, 0x81, 0x91 };
86
87/*
88 * Functions declaration
89 */
b9e39b1b
JD		 90static int fscpos_probe(struct i2c_client *client,
91 const struct i2c_device_id *id);
92static int fscpos_detect(struct i2c_client *client, int kind,
93 struct i2c_board_info *info);
94static int fscpos_remove(struct i2c_client *client);
1da177e4 95
f6c27fc1
DJ		 96static int fscpos_read_value(struct i2c_client *client, u8 reg);
97static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value);
1da177e4
LT		 98static struct fscpos_data *fscpos_update_device(struct device *dev);
99static void fscpos_init_client(struct i2c_client *client);
100
101static void reset_fan_alarm(struct i2c_client *client, int nr);
102
103/*
104 * Driver data (common to all clients)
105 */
b9e39b1b
JD		 106static const struct i2c_device_id fscpos_id[] = {
107 { "fscpos", fscpos },
108 { }
109};
110
1da177e4 111static struct i2c_driver fscpos_driver = {
b9e39b1b 112 .class = I2C_CLASS_HWMON,
cdaf7934 113 .driver = {
cdaf7934
LR		 114 .name = "fscpos",
115 },
b9e39b1b
JD		 116 .probe = fscpos_probe,
117 .remove = fscpos_remove,
118 .id_table = fscpos_id,
119 .detect = fscpos_detect,
120 .address_data = &addr_data,
1da177e4
LT		 121};
122
123/*
124 * Client data (each client gets its own)
125 */
126struct fscpos_data {
1beeffe4 127 struct device *hwmon_dev;
9a61bf63 128 struct mutex update_lock;
1da177e4
LT		 129 char valid; /* 0 until following fields are valid */
130 unsigned long last_updated; /* In jiffies */
131
132 /* register values */
133 u8 revision; /* revision of chip */
134 u8 global_event; /* global event status */
135 u8 global_control; /* global control register */
136 u8 wdog_control; /* watchdog control */
137 u8 wdog_state; /* watchdog status */
138 u8 wdog_preset; /* watchdog preset */
139 u8 volt[3]; /* 12, 5, battery current */
140 u8 temp_act[3]; /* temperature */
141 u8 temp_status[3]; /* status of sensor */
142 u8 fan_act[3]; /* fans revolutions per second */
143 u8 fan_status[3]; /* fan status */
144 u8 pwm[2]; /* fan min value for rps */
145 u8 fan_ripple[3]; /* divider for rps */
146};
147
148/* Temperature */
149#define TEMP_FROM_REG(val) (((val) - 128) * 1000)
150
151static ssize_t show_temp_input(struct fscpos_data *data, char *buf, int nr)
152{
153 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[nr - 1]));
154}
155
156static ssize_t show_temp_status(struct fscpos_data *data, char *buf, int nr)
157{
158 /* bits 2..7 reserved => mask with 0x03 */
159 return sprintf(buf, "%u\n", data->temp_status[nr - 1] & 0x03);
160}
161
162static ssize_t show_temp_reset(struct fscpos_data *data, char *buf, int nr)
163{
164 return sprintf(buf, "1\n");
165}
166
167static ssize_t set_temp_reset(struct i2c_client *client, struct fscpos_data
168 *data, const char *buf, size_t count, int nr, int reg)
169{
170 unsigned long v = simple_strtoul(buf, NULL, 10);
171 if (v != 1) {
172 dev_err(&client->dev, "temp_reset value %ld not supported. "
173 "Use 1 to reset the alarm!\n", v);
174 return -EINVAL;
175 }
176
177 dev_info(&client->dev, "You used the temp_reset feature which has not "
178 "been proplerly tested. Please report your "
179 "experience to the module author.\n");
180
181 /* Supported value: 2 (clears the status) */
3fd1bb9b 182 fscpos_write_value(client, FSCPOS_REG_TEMP_STATE[nr - 1], 2);
1da177e4
LT		 183 return count;
184}
185
186/* Fans */
187#define RPM_FROM_REG(val) ((val) * 60)
188
189static ssize_t show_fan_status(struct fscpos_data *data, char *buf, int nr)
190{
191 /* bits 0..1, 3..7 reserved => mask with 0x04 */
192 return sprintf(buf, "%u\n", data->fan_status[nr - 1] & 0x04);
193}
194
195static ssize_t show_fan_input(struct fscpos_data *data, char *buf, int nr)
196{
197 return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[nr - 1]));
198}
199
200static ssize_t show_fan_ripple(struct fscpos_data *data, char *buf, int nr)
201{
202 /* bits 2..7 reserved => mask with 0x03 */
203 return sprintf(buf, "%u\n", data->fan_ripple[nr - 1] & 0x03);
204}
205
206static ssize_t set_fan_ripple(struct i2c_client *client, struct fscpos_data
207 *data, const char *buf, size_t count, int nr, int reg)
208{
209 /* supported values: 2, 4, 8 */
210 unsigned long v = simple_strtoul(buf, NULL, 10);
211
212 switch (v) {
213 case 2: v = 1; break;
214 case 4: v = 2; break;
215 case 8: v = 3; break;
216 default:
217 dev_err(&client->dev, "fan_ripple value %ld not supported. "
218 "Must be one of 2, 4 or 8!\n", v);
219 return -EINVAL;
220 }
221
9a61bf63 222 mutex_lock(&data->update_lock);
1da177e4
LT		 223 /* bits 2..7 reserved => mask with 0x03 */
224 data->fan_ripple[nr - 1] &= ~0x03;
225 data->fan_ripple[nr - 1] |= v;
226
227 fscpos_write_value(client, reg, data->fan_ripple[nr - 1]);
9a61bf63 228 mutex_unlock(&data->update_lock);
1da177e4
LT		 229 return count;
230}
231
232static ssize_t show_pwm(struct fscpos_data *data, char *buf, int nr)
233{
234 return sprintf(buf, "%u\n", data->pwm[nr - 1]);
235}
236
237static ssize_t set_pwm(struct i2c_client *client, struct fscpos_data *data,
238 const char *buf, size_t count, int nr, int reg)
239{
240 unsigned long v = simple_strtoul(buf, NULL, 10);
241
242 /* Range: 0..255 */
243 if (v < 0) v = 0;
244 if (v > 255) v = 255;
245
9a61bf63 246 mutex_lock(&data->update_lock);
1da177e4
LT		 247 data->pwm[nr - 1] = v;
248 fscpos_write_value(client, reg, data->pwm[nr - 1]);
9a61bf63 249 mutex_unlock(&data->update_lock);
1da177e4
LT		 250 return count;
251}
252
253static void reset_fan_alarm(struct i2c_client *client, int nr)
254{
255 fscpos_write_value(client, FSCPOS_REG_FAN_STATE[nr], 4);
256}
257
258/* Volts */
259#define VOLT_FROM_REG(val, mult) ((val) * (mult) / 255)
260
30f74292 261static ssize_t show_volt_12(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 262{
263 struct fscpos_data *data = fscpos_update_device(dev);
264 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[0], 14200));
265}
266
30f74292 267static ssize_t show_volt_5(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 268{
269 struct fscpos_data *data = fscpos_update_device(dev);
270 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[1], 6600));
271}
272
30f74292 273static ssize_t show_volt_batt(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 274{
275 struct fscpos_data *data = fscpos_update_device(dev);
276 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[2], 3300));
277}
278
279/* Watchdog */
280static ssize_t show_wdog_control(struct fscpos_data *data, char *buf)
281{
282 /* bits 0..3 reserved, bit 6 write only => mask with 0xb0 */
283 return sprintf(buf, "%u\n", data->wdog_control & 0xb0);
284}
285
286static ssize_t set_wdog_control(struct i2c_client *client, struct fscpos_data
287 *data, const char *buf, size_t count, int reg)
288{
289 /* bits 0..3 reserved => mask with 0xf0 */
290 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
291
9a61bf63 292 mutex_lock(&data->update_lock);
1da177e4
LT		 293 data->wdog_control &= ~0xf0;
294 data->wdog_control |= v;
295 fscpos_write_value(client, reg, data->wdog_control);
9a61bf63 296 mutex_unlock(&data->update_lock);
1da177e4
LT		 297 return count;
298}
299
300static ssize_t show_wdog_state(struct fscpos_data *data, char *buf)
301{
302 /* bits 0, 2..7 reserved => mask with 0x02 */
303 return sprintf(buf, "%u\n", data->wdog_state & 0x02);
304}
305
306static ssize_t set_wdog_state(struct i2c_client *client, struct fscpos_data
307 *data, const char *buf, size_t count, int reg)
308{
309 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
310
311 /* Valid values: 2 (clear) */
312 if (v != 2) {
313 dev_err(&client->dev, "wdog_state value %ld not supported. "
314 "Must be 2 to clear the state!\n", v);
315 return -EINVAL;
316 }
317
9a61bf63 318 mutex_lock(&data->update_lock);
1da177e4
LT		 319 data->wdog_state &= ~v;
320 fscpos_write_value(client, reg, v);
9a61bf63 321 mutex_unlock(&data->update_lock);
1da177e4
LT		 322 return count;
323}
324
325static ssize_t show_wdog_preset(struct fscpos_data *data, char *buf)
326{
327 return sprintf(buf, "%u\n", data->wdog_preset);
328}
329
330static ssize_t set_wdog_preset(struct i2c_client *client, struct fscpos_data
331 *data, const char *buf, size_t count, int reg)
332{
333 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
334
9a61bf63 335 mutex_lock(&data->update_lock);
1da177e4
LT		 336 data->wdog_preset = v;
337 fscpos_write_value(client, reg, data->wdog_preset);
9a61bf63 338 mutex_unlock(&data->update_lock);
1da177e4
LT		 339 return count;
340}
341
342/* Event */
30f74292 343static ssize_t show_event(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 344{
345 /* bits 5..7 reserved => mask with 0x1f */
346 struct fscpos_data *data = fscpos_update_device(dev);
347 return sprintf(buf, "%u\n", data->global_event & 0x9b);
348}
349
350/*
351 * Sysfs stuff
352 */
353#define create_getter(kind, sub) \
30f74292 354 static ssize_t sysfs_show_##kind##sub(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 355 { \
356 struct fscpos_data *data = fscpos_update_device(dev); \
357 return show_##kind##sub(data, buf); \
358 }
359
360#define create_getter_n(kind, offset, sub) \
30f74292 361 static ssize_t sysfs_show_##kind##offset##sub(struct device *dev, struct device_attribute *attr, char\
1da177e4
LT		 362 *buf) \
363 { \
364 struct fscpos_data *data = fscpos_update_device(dev); \
365 return show_##kind##sub(data, buf, offset); \
366 }
367
368#define create_setter(kind, sub, reg) \
30f74292 369 static ssize_t sysfs_set_##kind##sub (struct device *dev, struct device_attribute *attr, const char \
1da177e4
LT		 370 *buf, size_t count) \
371 { \
372 struct i2c_client *client = to_i2c_client(dev); \
373 struct fscpos_data *data = i2c_get_clientdata(client); \
374 return set_##kind##sub(client, data, buf, count, reg); \
375 }
376
377#define create_setter_n(kind, offset, sub, reg) \
30f74292 378 static ssize_t sysfs_set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, \
1da177e4
LT		 379 const char *buf, size_t count) \
380 { \
381 struct i2c_client *client = to_i2c_client(dev); \
382 struct fscpos_data *data = i2c_get_clientdata(client); \
383 return set_##kind##sub(client, data, buf, count, offset, reg);\
384 }
385
386#define create_sysfs_device_ro(kind, sub, offset) \
387 static DEVICE_ATTR(kind##offset##sub, S_IRUGO, \
388 sysfs_show_##kind##offset##sub, NULL);
389
390#define create_sysfs_device_rw(kind, sub, offset) \
391 static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, \
392 sysfs_show_##kind##offset##sub, sysfs_set_##kind##offset##sub);
393
394#define sysfs_ro_n(kind, sub, offset) \
395 create_getter_n(kind, offset, sub); \
396 create_sysfs_device_ro(kind, sub, offset);
397
398#define sysfs_rw_n(kind, sub, offset, reg) \
399 create_getter_n(kind, offset, sub); \
400 create_setter_n(kind, offset, sub, reg); \
401 create_sysfs_device_rw(kind, sub, offset);
402
403#define sysfs_rw(kind, sub, reg) \
404 create_getter(kind, sub); \
405 create_setter(kind, sub, reg); \
406 create_sysfs_device_rw(kind, sub,);
407
408#define sysfs_fan_with_min(offset, reg_status, reg_ripple, reg_min) \
409 sysfs_fan(offset, reg_status, reg_ripple); \
410 sysfs_rw_n(pwm,, offset, reg_min);
411
412#define sysfs_fan(offset, reg_status, reg_ripple) \
413 sysfs_ro_n(fan, _input, offset); \
414 sysfs_ro_n(fan, _status, offset); \
415 sysfs_rw_n(fan, _ripple, offset, reg_ripple);
416
417#define sysfs_temp(offset, reg_status) \
418 sysfs_ro_n(temp, _input, offset); \
419 sysfs_ro_n(temp, _status, offset); \
420 sysfs_rw_n(temp, _reset, offset, reg_status);
421
422#define sysfs_watchdog(reg_wdog_preset, reg_wdog_state, reg_wdog_control) \
423 sysfs_rw(wdog, _control, reg_wdog_control); \
424 sysfs_rw(wdog, _preset, reg_wdog_preset); \
425 sysfs_rw(wdog, _state, reg_wdog_state);
426
427sysfs_fan_with_min(1, FSCPOS_REG_FAN_STATE[0], FSCPOS_REG_FAN_RIPPLE[0],
428 FSCPOS_REG_PWM[0]);
429sysfs_fan_with_min(2, FSCPOS_REG_FAN_STATE[1], FSCPOS_REG_FAN_RIPPLE[1],
430 FSCPOS_REG_PWM[1]);
431sysfs_fan(3, FSCPOS_REG_FAN_STATE[2], FSCPOS_REG_FAN_RIPPLE[2]);
432
433sysfs_temp(1, FSCPOS_REG_TEMP_STATE[0]);
434sysfs_temp(2, FSCPOS_REG_TEMP_STATE[1]);
435sysfs_temp(3, FSCPOS_REG_TEMP_STATE[2]);
436
437sysfs_watchdog(FSCPOS_REG_WDOG_PRESET, FSCPOS_REG_WDOG_STATE,
438 FSCPOS_REG_WDOG_CONTROL);
439
440static DEVICE_ATTR(event, S_IRUGO, show_event, NULL);
441static DEVICE_ATTR(in0_input, S_IRUGO, show_volt_12, NULL);
442static DEVICE_ATTR(in1_input, S_IRUGO, show_volt_5, NULL);
443static DEVICE_ATTR(in2_input, S_IRUGO, show_volt_batt, NULL);
444
87808be4
JD		 445static struct attribute *fscpos_attributes[] = {
446 &dev_attr_event.attr,
447 &dev_attr_in0_input.attr,
448 &dev_attr_in1_input.attr,
449 &dev_attr_in2_input.attr,
450
451 &dev_attr_wdog_control.attr,
452 &dev_attr_wdog_preset.attr,
453 &dev_attr_wdog_state.attr,
454
455 &dev_attr_temp1_input.attr,
456 &dev_attr_temp1_status.attr,
457 &dev_attr_temp1_reset.attr,
458 &dev_attr_temp2_input.attr,
459 &dev_attr_temp2_status.attr,
460 &dev_attr_temp2_reset.attr,
461 &dev_attr_temp3_input.attr,
462 &dev_attr_temp3_status.attr,
463 &dev_attr_temp3_reset.attr,
464
465 &dev_attr_fan1_input.attr,
466 &dev_attr_fan1_status.attr,
467 &dev_attr_fan1_ripple.attr,
468 &dev_attr_pwm1.attr,
469 &dev_attr_fan2_input.attr,
470 &dev_attr_fan2_status.attr,
471 &dev_attr_fan2_ripple.attr,
472 &dev_attr_pwm2.attr,
473 &dev_attr_fan3_input.attr,
474 &dev_attr_fan3_status.attr,
475 &dev_attr_fan3_ripple.attr,
476 NULL
477};
478
479static const struct attribute_group fscpos_group = {
480 .attrs = fscpos_attributes,
481};
482
b9e39b1b
JD		 483/* Return 0 if detection is successful, -ENODEV otherwise */
484static int fscpos_detect(struct i2c_client *new_client, int kind,
485 struct i2c_board_info *info)
1da177e4 486{
b9e39b1b 487 struct i2c_adapter *adapter = new_client->adapter;
1da177e4
LT		 488
489 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
b9e39b1b 490 return -ENODEV;
1da177e4
LT		 491
492 /* Do the remaining detection unless force or force_fscpos parameter */
493 if (kind < 0) {
494 if ((fscpos_read_value(new_client, FSCPOS_REG_IDENT_0)
495 != 0x50) /* 'P' */
496 || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_1)
497 != 0x45) /* 'E' */
498 || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_2)
499 != 0x47))/* 'G' */
b9e39b1b 500 return -ENODEV;
1da177e4
LT		 501 }
502
b9e39b1b
JD		 503 strlcpy(info->type, "fscpos", I2C_NAME_SIZE);
504
505 return 0;
506}
507
508static int fscpos_probe(struct i2c_client *new_client,
509 const struct i2c_device_id *id)
510{
511 struct fscpos_data *data;
512 int err;
1da177e4 513
b9e39b1b
JD		 514 data = kzalloc(sizeof(struct fscpos_data), GFP_KERNEL);
515 if (!data) {
516 err = -ENOMEM;
517 goto exit;
518 }
519
520 i2c_set_clientdata(new_client, data);
1da177e4 521 data->valid = 0;
9a61bf63 522 mutex_init(&data->update_lock);
1da177e4 523
1da177e4
LT		 524 /* Inizialize the fscpos chip */
525 fscpos_init_client(new_client);
526
527 /* Announce that the chip was found */
528 dev_info(&new_client->dev, "Found fscpos chip, rev %u\n", data->revision);
529
530 /* Register sysfs hooks */
87808be4 531 if ((err = sysfs_create_group(&new_client->dev.kobj, &fscpos_group)))
b9e39b1b 532 goto exit_free;
87808be4 533
1beeffe4
TJ		 534 data->hwmon_dev = hwmon_device_register(&new_client->dev);
535 if (IS_ERR(data->hwmon_dev)) {
536 err = PTR_ERR(data->hwmon_dev);
87808be4 537 goto exit_remove_files;
943b0830
MH		 538 }
539
1da177e4
LT		 540 return 0;
541
87808be4
JD		 542exit_remove_files:
543 sysfs_remove_group(&new_client->dev.kobj, &fscpos_group);
1da177e4
LT		 544exit_free:
545 kfree(data);
546exit:
547 return err;
548}
549
b9e39b1b 550static int fscpos_remove(struct i2c_client *client)
1da177e4 551{
943b0830 552 struct fscpos_data *data = i2c_get_clientdata(client);
1da177e4 553
1beeffe4 554 hwmon_device_unregister(data->hwmon_dev);
87808be4 555 sysfs_remove_group(&client->dev.kobj, &fscpos_group);
943b0830 556
943b0830 557 kfree(data);
1da177e4
LT		 558 return 0;
559}
560
561static int fscpos_read_value(struct i2c_client *client, u8 reg)
562{
563 dev_dbg(&client->dev, "Read reg 0x%02x\n", reg);
564 return i2c_smbus_read_byte_data(client, reg);
565}
566
567static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value)
568{
569 dev_dbg(&client->dev, "Write reg 0x%02x, val 0x%02x\n", reg, value);
570 return i2c_smbus_write_byte_data(client, reg, value);
571}
572
573/* Called when we have found a new FSCPOS chip */
574static void fscpos_init_client(struct i2c_client *client)
575{
576 struct fscpos_data *data = i2c_get_clientdata(client);
577
578 /* read revision from chip */
579 data->revision = fscpos_read_value(client, FSCPOS_REG_REVISION);
580}
581
582static struct fscpos_data *fscpos_update_device(struct device *dev)
583{
584 struct i2c_client *client = to_i2c_client(dev);
585 struct fscpos_data *data = i2c_get_clientdata(client);
586
9a61bf63 587 mutex_lock(&data->update_lock);
1da177e4 588
0cacdf29 589 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
1da177e4
LT		 590 int i;
591
592 dev_dbg(&client->dev, "Starting fscpos update\n");
593
594 for (i = 0; i < 3; i++) {
595 data->temp_act[i] = fscpos_read_value(client,
596 FSCPOS_REG_TEMP_ACT[i]);
597 data->temp_status[i] = fscpos_read_value(client,
598 FSCPOS_REG_TEMP_STATE[i]);
599 data->fan_act[i] = fscpos_read_value(client,
600 FSCPOS_REG_FAN_ACT[i]);
601 data->fan_status[i] = fscpos_read_value(client,
602 FSCPOS_REG_FAN_STATE[i]);
603 data->fan_ripple[i] = fscpos_read_value(client,
604 FSCPOS_REG_FAN_RIPPLE[i]);
605 if (i < 2) {
606 /* fan2_min is not supported by the chip */
607 data->pwm[i] = fscpos_read_value(client,
608 FSCPOS_REG_PWM[i]);
609 }
610 /* reset fan status if speed is back to > 0 */
611 if (data->fan_status[i] != 0 && data->fan_act[i] > 0) {
612 reset_fan_alarm(client, i);
613 }
614 }
615
616 data->volt[0] = fscpos_read_value(client, FSCPOS_REG_VOLT_12);
617 data->volt[1] = fscpos_read_value(client, FSCPOS_REG_VOLT_5);
618 data->volt[2] = fscpos_read_value(client, FSCPOS_REG_VOLT_BATT);
619
620 data->wdog_preset = fscpos_read_value(client,
621 FSCPOS_REG_WDOG_PRESET);
622 data->wdog_state = fscpos_read_value(client,
623 FSCPOS_REG_WDOG_STATE);
624 data->wdog_control = fscpos_read_value(client,
625 FSCPOS_REG_WDOG_CONTROL);
626
627 data->global_event = fscpos_read_value(client,
628 FSCPOS_REG_EVENT_STATE);
629
630 data->last_updated = jiffies;
631 data->valid = 1;
632 }
9a61bf63 633 mutex_unlock(&data->update_lock);
1da177e4
LT		 634 return data;
635}
636
637static int __init sm_fscpos_init(void)
638{
639 return i2c_add_driver(&fscpos_driver);
640}
641
642static void __exit sm_fscpos_exit(void)
643{
644 i2c_del_driver(&fscpos_driver);
645}
646
647MODULE_AUTHOR("Stefan Ott <stefan@desire.ch> based on work from Hermann Jung "
648 "<hej@odn.de>, Frodo Looijaard <frodol@dds.nl>"
649 " and Philip Edelbrock <phil@netroedge.com>");
650MODULE_DESCRIPTION("fujitsu siemens poseidon chip driver");
651MODULE_LICENSE("GPL");
652
653module_init(sm_fscpos_init);
654module_exit(sm_fscpos_exit);
Linux 6.x block layer and io_uring tree(s)