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netxen: cleanup debug messages
[linux-2.6/x86.git] / drivers / hwmon / adt7473.c
blobc1009d6f97965b160d26ac4723235d97280a427c
1 /*
2 * A hwmon driver for the Analog Devices ADT7473
3 * Copyright (C) 2007 IBM
4 *
5 * Author: Darrick J. Wong <djwong@us.ibm.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22 #include <linux/module.h>
23 #include <linux/jiffies.h>
24 #include <linux/i2c.h>
25 #include <linux/hwmon.h>
26 #include <linux/hwmon-sysfs.h>
27 #include <linux/err.h>
28 #include <linux/mutex.h>
29 #include <linux/delay.h>
30 #include <linux/log2.h>
31
32 /* Addresses to scan */
33 static const unsigned short normal_i2c[] = { 0x2C, 0x2D, 0x2E, I2C_CLIENT_END };
34
35 /* Insmod parameters */
36 I2C_CLIENT_INSMOD_1(adt7473);
37
38 /* ADT7473 registers */
39 #define ADT7473_REG_BASE_ADDR 0x20
40
41 #define ADT7473_REG_VOLT_BASE_ADDR 0x21
42 #define ADT7473_REG_VOLT_MAX_ADDR 0x22
43 #define ADT7473_REG_VOLT_MIN_BASE_ADDR 0x46
44 #define ADT7473_REG_VOLT_MIN_MAX_ADDR 0x49
45
46 #define ADT7473_REG_TEMP_BASE_ADDR 0x25
47 #define ADT7473_REG_TEMP_MAX_ADDR 0x27
48 #define ADT7473_REG_TEMP_LIMITS_BASE_ADDR 0x4E
49 #define ADT7473_REG_TEMP_LIMITS_MAX_ADDR 0x53
50 #define ADT7473_REG_TEMP_TMIN_BASE_ADDR 0x67
51 #define ADT7473_REG_TEMP_TMIN_MAX_ADDR 0x69
52 #define ADT7473_REG_TEMP_TMAX_BASE_ADDR 0x6A
53 #define ADT7473_REG_TEMP_TMAX_MAX_ADDR 0x6C
54
55 #define ADT7473_REG_FAN_BASE_ADDR 0x28
56 #define ADT7473_REG_FAN_MAX_ADDR 0x2F
57 #define ADT7473_REG_FAN_MIN_BASE_ADDR 0x54
58 #define ADT7473_REG_FAN_MIN_MAX_ADDR 0x5B
59
60 #define ADT7473_REG_PWM_BASE_ADDR 0x30
61 #define ADT7473_REG_PWM_MAX_ADDR 0x32
62 #define ADT7473_REG_PWM_MIN_BASE_ADDR 0x64
63 #define ADT7473_REG_PWM_MIN_MAX_ADDR 0x66
64 #define ADT7473_REG_PWM_MAX_BASE_ADDR 0x38
65 #define ADT7473_REG_PWM_MAX_MAX_ADDR 0x3A
66 #define ADT7473_REG_PWM_BHVR_BASE_ADDR 0x5C
67 #define ADT7473_REG_PWM_BHVR_MAX_ADDR 0x5E
68 #define ADT7473_PWM_BHVR_MASK 0xE0
69 #define ADT7473_PWM_BHVR_SHIFT 5
70
71 #define ADT7473_REG_CFG1 0x40
72 #define ADT7473_CFG1_START 0x01
73 #define ADT7473_CFG1_READY 0x04
74 #define ADT7473_REG_CFG2 0x73
75 #define ADT7473_REG_CFG3 0x78
76 #define ADT7473_REG_CFG4 0x7D
77 #define ADT7473_CFG4_MAX_DUTY_AT_OVT 0x08
78 #define ADT7473_REG_CFG5 0x7C
79 #define ADT7473_CFG5_TEMP_TWOS 0x01
80 #define ADT7473_CFG5_TEMP_OFFSET 0x02
81
82 #define ADT7473_REG_DEVICE 0x3D
83 #define ADT7473_VENDOR 0x41
84 #define ADT7473_REG_VENDOR 0x3E
85 #define ADT7473_DEVICE 0x73
86 #define ADT7473_REG_REVISION 0x3F
87 #define ADT7473_REV_68 0x68
88 #define ADT7473_REV_69 0x69
89
90 #define ADT7473_REG_ALARM1 0x41
91 #define ADT7473_VCCP_ALARM 0x02
92 #define ADT7473_VCC_ALARM 0x04
93 #define ADT7473_R1T_ALARM 0x10
94 #define ADT7473_LT_ALARM 0x20
95 #define ADT7473_R2T_ALARM 0x40
96 #define ADT7473_OOL 0x80
97 #define ADT7473_REG_ALARM2 0x42
98 #define ADT7473_OVT_ALARM 0x02
99 #define ADT7473_FAN1_ALARM 0x04
100 #define ADT7473_FAN2_ALARM 0x08
101 #define ADT7473_FAN3_ALARM 0x10
102 #define ADT7473_FAN4_ALARM 0x20
103 #define ADT7473_R1T_SHORT 0x40
104 #define ADT7473_R2T_SHORT 0x80
105 #define ADT7473_REG_MAX_ADDR 0x80
106
107 #define ALARM2(x) ((x) << 8)
108
109 #define ADT7473_VOLT_COUNT 2
110 #define ADT7473_REG_VOLT(x) (ADT7473_REG_VOLT_BASE_ADDR + (x))
111 #define ADT7473_REG_VOLT_MIN(x) (ADT7473_REG_VOLT_MIN_BASE_ADDR + ((x) * 2))
112 #define ADT7473_REG_VOLT_MAX(x) (ADT7473_REG_VOLT_MIN_BASE_ADDR + \
113 ((x) * 2) + 1)
114
115 #define ADT7473_TEMP_COUNT 3
116 #define ADT7473_REG_TEMP(x) (ADT7473_REG_TEMP_BASE_ADDR + (x))
117 #define ADT7473_REG_TEMP_MIN(x) (ADT7473_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
118 #define ADT7473_REG_TEMP_MAX(x) (ADT7473_REG_TEMP_LIMITS_BASE_ADDR + \
119 ((x) * 2) + 1)
120 #define ADT7473_REG_TEMP_TMIN(x) (ADT7473_REG_TEMP_TMIN_BASE_ADDR + (x))
121 #define ADT7473_REG_TEMP_TMAX(x) (ADT7473_REG_TEMP_TMAX_BASE_ADDR + (x))
122
123 #define ADT7473_FAN_COUNT 4
124 #define ADT7473_REG_FAN(x) (ADT7473_REG_FAN_BASE_ADDR + ((x) * 2))
125 #define ADT7473_REG_FAN_MIN(x) (ADT7473_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
126
127 #define ADT7473_PWM_COUNT 3
128 #define ADT7473_REG_PWM(x) (ADT7473_REG_PWM_BASE_ADDR + (x))
129 #define ADT7473_REG_PWM_MAX(x) (ADT7473_REG_PWM_MAX_BASE_ADDR + (x))
130 #define ADT7473_REG_PWM_MIN(x) (ADT7473_REG_PWM_MIN_BASE_ADDR + (x))
131 #define ADT7473_REG_PWM_BHVR(x) (ADT7473_REG_PWM_BHVR_BASE_ADDR + (x))
132
133 /* How often do we reread sensors values? (In jiffies) */
134 #define SENSOR_REFRESH_INTERVAL (2 * HZ)
135
136 /* How often do we reread sensor limit values? (In jiffies) */
137 #define LIMIT_REFRESH_INTERVAL (60 * HZ)
138
139 /* datasheet says to divide this number by the fan reading to get fan rpm */
140 #define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
141 #define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
142 #define FAN_PERIOD_INVALID 65535
143 #define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
144
145 struct adt7473_data {
146 struct i2c_client client;
147 struct device *hwmon_dev;
148 struct attribute_group attrs;
149 struct mutex lock;
150 char sensors_valid;
151 char limits_valid;
152 unsigned long sensors_last_updated; /* In jiffies */
153 unsigned long limits_last_updated; /* In jiffies */
154
155 u8 volt[ADT7473_VOLT_COUNT];
156 s8 volt_min[ADT7473_VOLT_COUNT];
157 s8 volt_max[ADT7473_VOLT_COUNT];
158
159 s8 temp[ADT7473_TEMP_COUNT];
160 s8 temp_min[ADT7473_TEMP_COUNT];
161 s8 temp_max[ADT7473_TEMP_COUNT];
162 s8 temp_tmin[ADT7473_TEMP_COUNT];
163 /* This is called the !THERM limit in the datasheet */
164 s8 temp_tmax[ADT7473_TEMP_COUNT];
165
166 u16 fan[ADT7473_FAN_COUNT];
167 u16 fan_min[ADT7473_FAN_COUNT];
168
169 u8 pwm[ADT7473_PWM_COUNT];
170 u8 pwm_max[ADT7473_PWM_COUNT];
171 u8 pwm_min[ADT7473_PWM_COUNT];
172 u8 pwm_behavior[ADT7473_PWM_COUNT];
173
174 u8 temp_twos_complement;
175 u8 temp_offset;
176
177 u16 alarm;
178 u8 max_duty_at_overheat;
179 };
180
181 static int adt7473_attach_adapter(struct i2c_adapter *adapter);
182 static int adt7473_detect(struct i2c_adapter *adapter, int address, int kind);
183 static int adt7473_detach_client(struct i2c_client *client);
184
185 static struct i2c_driver adt7473_driver = {
186 .driver = {
187 .name = "adt7473",
188 },
189 .attach_adapter = adt7473_attach_adapter,
190 .detach_client = adt7473_detach_client,
191 };
192
193 /*
194 * 16-bit registers on the ADT7473 are low-byte first. The data sheet says
195 * that the low byte must be read before the high byte.
196 */
197 static inline int adt7473_read_word_data(struct i2c_client *client, u8 reg)
198 {
199 u16 foo;
200 foo = i2c_smbus_read_byte_data(client, reg);
201 foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
202 return foo;
203 }
204
205 static inline int adt7473_write_word_data(struct i2c_client *client, u8 reg,
206 u16 value)
207 {
208 return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
209 && i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
210 }
211
212 static void adt7473_init_client(struct i2c_client *client)
213 {
214 int reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG1);
215
216 if (!(reg & ADT7473_CFG1_READY)) {
217 dev_err(&client->dev, "Chip not ready.\n");
218 } else {
219 /* start monitoring */
220 i2c_smbus_write_byte_data(client, ADT7473_REG_CFG1,
221 reg | ADT7473_CFG1_START);
222 }
223 }
224
225 static struct adt7473_data *adt7473_update_device(struct device *dev)
226 {
227 struct i2c_client *client = to_i2c_client(dev);
228 struct adt7473_data *data = i2c_get_clientdata(client);
229 unsigned long local_jiffies = jiffies;
230 u8 cfg;
231 int i;
232
233 mutex_lock(&data->lock);
234 if (time_before(local_jiffies, data->sensors_last_updated +
235 SENSOR_REFRESH_INTERVAL)
236 && data->sensors_valid)
237 goto no_sensor_update;
238
239 for (i = 0; i < ADT7473_VOLT_COUNT; i++)
240 data->volt[i] = i2c_smbus_read_byte_data(client,
241 ADT7473_REG_VOLT(i));
242
243 /* Determine temperature encoding */
244 cfg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG5);
245 data->temp_twos_complement = (cfg & ADT7473_CFG5_TEMP_TWOS);
246
247 /*
248 * What does this do? it implies a variable temperature sensor
249 * offset, but the datasheet doesn't say anything about this bit
250 * and other parts of the datasheet imply that "offset64" mode
251 * means that you shift temp values by -64 if the above bit was set.
252 */
253 data->temp_offset = (cfg & ADT7473_CFG5_TEMP_OFFSET);
254
255 for (i = 0; i < ADT7473_TEMP_COUNT; i++)
256 data->temp[i] = i2c_smbus_read_byte_data(client,
257 ADT7473_REG_TEMP(i));
258
259 for (i = 0; i < ADT7473_FAN_COUNT; i++)
260 data->fan[i] = adt7473_read_word_data(client,
261 ADT7473_REG_FAN(i));
262
263 for (i = 0; i < ADT7473_PWM_COUNT; i++)
264 data->pwm[i] = i2c_smbus_read_byte_data(client,
265 ADT7473_REG_PWM(i));
266
267 data->alarm = i2c_smbus_read_byte_data(client, ADT7473_REG_ALARM1);
268 if (data->alarm & ADT7473_OOL)
269 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
270 ADT7473_REG_ALARM2));
271
272 data->sensors_last_updated = local_jiffies;
273 data->sensors_valid = 1;
274
275 no_sensor_update:
276 if (time_before(local_jiffies, data->limits_last_updated +
277 LIMIT_REFRESH_INTERVAL)
278 && data->limits_valid)
279 goto out;
280
281 for (i = 0; i < ADT7473_VOLT_COUNT; i++) {
282 data->volt_min[i] = i2c_smbus_read_byte_data(client,
283 ADT7473_REG_VOLT_MIN(i));
284 data->volt_max[i] = i2c_smbus_read_byte_data(client,
285 ADT7473_REG_VOLT_MAX(i));
286 }
287
288 for (i = 0; i < ADT7473_TEMP_COUNT; i++) {
289 data->temp_min[i] = i2c_smbus_read_byte_data(client,
290 ADT7473_REG_TEMP_MIN(i));
291 data->temp_max[i] = i2c_smbus_read_byte_data(client,
292 ADT7473_REG_TEMP_MAX(i));
293 data->temp_tmin[i] = i2c_smbus_read_byte_data(client,
294 ADT7473_REG_TEMP_TMIN(i));
295 data->temp_tmax[i] = i2c_smbus_read_byte_data(client,
296 ADT7473_REG_TEMP_TMAX(i));
297 }
298
299 for (i = 0; i < ADT7473_FAN_COUNT; i++)
300 data->fan_min[i] = adt7473_read_word_data(client,
301 ADT7473_REG_FAN_MIN(i));
302
303 for (i = 0; i < ADT7473_PWM_COUNT; i++) {
304 data->pwm_max[i] = i2c_smbus_read_byte_data(client,
305 ADT7473_REG_PWM_MAX(i));
306 data->pwm_min[i] = i2c_smbus_read_byte_data(client,
307 ADT7473_REG_PWM_MIN(i));
308 data->pwm_behavior[i] = i2c_smbus_read_byte_data(client,
309 ADT7473_REG_PWM_BHVR(i));
310 }
311
312 data->limits_last_updated = local_jiffies;
313 data->limits_valid = 1;
314
315 out:
316 mutex_unlock(&data->lock);
317 return data;
318 }
319
320 /*
321 * On this chip, voltages are given as a count of steps between a minimum
322 * and maximum voltage, not a direct voltage.
323 */
324 static const int volt_convert_table[][2] = {
325 {2997, 3},
326 {4395, 4},
327 };
328
329 static int decode_volt(int volt_index, u8 raw)
330 {
331 int cmax = volt_convert_table[volt_index][0];
332 int cmin = volt_convert_table[volt_index][1];
333 return ((raw * (cmax - cmin)) / 255) + cmin;
334 }
335
336 static u8 encode_volt(int volt_index, int cooked)
337 {
338 int cmax = volt_convert_table[volt_index][0];
339 int cmin = volt_convert_table[volt_index][1];
340 u8 x;
341
342 if (cooked > cmax)
343 cooked = cmax;
344 else if (cooked < cmin)
345 cooked = cmin;
346
347 x = ((cooked - cmin) * 255) / (cmax - cmin);
348
349 return x;
350 }
351
352 static ssize_t show_volt_min(struct device *dev,
353 struct device_attribute *devattr,
354 char *buf)
355 {
356 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
357 struct adt7473_data *data = adt7473_update_device(dev);
358 return sprintf(buf, "%d\n",
359 decode_volt(attr->index, data->volt_min[attr->index]));
360 }
361
362 static ssize_t set_volt_min(struct device *dev,
363 struct device_attribute *devattr,
364 const char *buf,
365 size_t count)
366 {
367 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
368 struct i2c_client *client = to_i2c_client(dev);
369 struct adt7473_data *data = i2c_get_clientdata(client);
370 int volt = encode_volt(attr->index, simple_strtol(buf, NULL, 10));
371
372 mutex_lock(&data->lock);
373 data->volt_min[attr->index] = volt;
374 i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MIN(attr->index),
375 volt);
376 mutex_unlock(&data->lock);
377
378 return count;
379 }
380
381 static ssize_t show_volt_max(struct device *dev,
382 struct device_attribute *devattr,
383 char *buf)
384 {
385 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
386 struct adt7473_data *data = adt7473_update_device(dev);
387 return sprintf(buf, "%d\n",
388 decode_volt(attr->index, data->volt_max[attr->index]));
389 }
390
391 static ssize_t set_volt_max(struct device *dev,
392 struct device_attribute *devattr,
393 const char *buf,
394 size_t count)
395 {
396 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
397 struct i2c_client *client = to_i2c_client(dev);
398 struct adt7473_data *data = i2c_get_clientdata(client);
399 int volt = encode_volt(attr->index, simple_strtol(buf, NULL, 10));
400
401 mutex_lock(&data->lock);
402 data->volt_max[attr->index] = volt;
403 i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MAX(attr->index),
404 volt);
405 mutex_unlock(&data->lock);
406
407 return count;
408 }
409
410 static ssize_t show_volt(struct device *dev, struct device_attribute *devattr,
411 char *buf)
412 {
413 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
414 struct adt7473_data *data = adt7473_update_device(dev);
415
416 return sprintf(buf, "%d\n",
417 decode_volt(attr->index, data->volt[attr->index]));
418 }
419
420 /*
421 * This chip can report temperature data either as a two's complement
422 * number in the range -128 to 127, or as an unsigned number that must
423 * be offset by 64.
424 */
425 static int decode_temp(u8 twos_complement, u8 raw)
426 {
427 return twos_complement ? (s8)raw : raw - 64;
428 }
429
430 static u8 encode_temp(u8 twos_complement, int cooked)
431 {
432 return twos_complement ? cooked & 0xFF : cooked + 64;
433 }
434
435 static ssize_t show_temp_min(struct device *dev,
436 struct device_attribute *devattr,
437 char *buf)
438 {
439 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
440 struct adt7473_data *data = adt7473_update_device(dev);
441 return sprintf(buf, "%d\n", 1000 * decode_temp(
442 data->temp_twos_complement,
443 data->temp_min[attr->index]));
444 }
445
446 static ssize_t set_temp_min(struct device *dev,
447 struct device_attribute *devattr,
448 const char *buf,
449 size_t count)
450 {
451 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
452 struct i2c_client *client = to_i2c_client(dev);
453 struct adt7473_data *data = i2c_get_clientdata(client);
454 int temp = simple_strtol(buf, NULL, 10) / 1000;
455 temp = encode_temp(data->temp_twos_complement, temp);
456
457 mutex_lock(&data->lock);
458 data->temp_min[attr->index] = temp;
459 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MIN(attr->index),
460 temp);
461 mutex_unlock(&data->lock);
462
463 return count;
464 }
465
466 static ssize_t show_temp_max(struct device *dev,
467 struct device_attribute *devattr,
468 char *buf)
469 {
470 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
471 struct adt7473_data *data = adt7473_update_device(dev);
472 return sprintf(buf, "%d\n", 1000 * decode_temp(
473 data->temp_twos_complement,
474 data->temp_max[attr->index]));
475 }
476
477 static ssize_t set_temp_max(struct device *dev,
478 struct device_attribute *devattr,
479 const char *buf,
480 size_t count)
481 {
482 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
483 struct i2c_client *client = to_i2c_client(dev);
484 struct adt7473_data *data = i2c_get_clientdata(client);
485 int temp = simple_strtol(buf, NULL, 10) / 1000;
486 temp = encode_temp(data->temp_twos_complement, temp);
487
488 mutex_lock(&data->lock);
489 data->temp_max[attr->index] = temp;
490 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MAX(attr->index),
491 temp);
492 mutex_unlock(&data->lock);
493
494 return count;
495 }
496
497 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
498 char *buf)
499 {
500 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
501 struct adt7473_data *data = adt7473_update_device(dev);
502 return sprintf(buf, "%d\n", 1000 * decode_temp(
503 data->temp_twos_complement,
504 data->temp[attr->index]));
505 }
506
507 static ssize_t show_fan_min(struct device *dev,
508 struct device_attribute *devattr,
509 char *buf)
510 {
511 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
512 struct adt7473_data *data = adt7473_update_device(dev);
513
514 if (FAN_DATA_VALID(data->fan_min[attr->index]))
515 return sprintf(buf, "%d\n",
516 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
517 else
518 return sprintf(buf, "0\n");
519 }
520
521 static ssize_t set_fan_min(struct device *dev,
522 struct device_attribute *devattr,
523 const char *buf, size_t count)
524 {
525 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
526 struct i2c_client *client = to_i2c_client(dev);
527 struct adt7473_data *data = i2c_get_clientdata(client);
528 int temp = simple_strtol(buf, NULL, 10);
529
530 if (!temp)
531 return -EINVAL;
532 temp = FAN_RPM_TO_PERIOD(temp);
533
534 mutex_lock(&data->lock);
535 data->fan_min[attr->index] = temp;
536 adt7473_write_word_data(client, ADT7473_REG_FAN_MIN(attr->index), temp);
537 mutex_unlock(&data->lock);
538
539 return count;
540 }
541
542 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
543 char *buf)
544 {
545 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
546 struct adt7473_data *data = adt7473_update_device(dev);
547
548 if (FAN_DATA_VALID(data->fan[attr->index]))
549 return sprintf(buf, "%d\n",
550 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
551 else
552 return sprintf(buf, "0\n");
553 }
554
555 static ssize_t show_max_duty_at_crit(struct device *dev,
556 struct device_attribute *devattr,
557 char *buf)
558 {
559 struct adt7473_data *data = adt7473_update_device(dev);
560 return sprintf(buf, "%d\n", data->max_duty_at_overheat);
561 }
562
563 static ssize_t set_max_duty_at_crit(struct device *dev,
564 struct device_attribute *devattr,
565 const char *buf,
566 size_t count)
567 {
568 u8 reg;
569 struct i2c_client *client = to_i2c_client(dev);
570 struct adt7473_data *data = i2c_get_clientdata(client);
571 int temp = simple_strtol(buf, NULL, 10);
572 temp = temp && 0xFF;
573
574 mutex_lock(&data->lock);
575 data->max_duty_at_overheat = temp;
576 reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
577 if (temp)
578 reg |= ADT7473_CFG4_MAX_DUTY_AT_OVT;
579 else
580 reg &= ~ADT7473_CFG4_MAX_DUTY_AT_OVT;
581 i2c_smbus_write_byte_data(client, ADT7473_REG_CFG4, reg);
582 mutex_unlock(&data->lock);
583
584 return count;
585 }
586
587 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
588 char *buf)
589 {
590 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
591 struct adt7473_data *data = adt7473_update_device(dev);
592 return sprintf(buf, "%d\n", data->pwm[attr->index]);
593 }
594
595 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
596 const char *buf, size_t count)
597 {
598 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
599 struct i2c_client *client = to_i2c_client(dev);
600 struct adt7473_data *data = i2c_get_clientdata(client);
601 int temp = simple_strtol(buf, NULL, 10);
602
603 mutex_lock(&data->lock);
604 data->pwm[attr->index] = temp;
605 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM(attr->index), temp);
606 mutex_unlock(&data->lock);
607
608 return count;
609 }
610
611 static ssize_t show_pwm_max(struct device *dev,
612 struct device_attribute *devattr,
613 char *buf)
614 {
615 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
616 struct adt7473_data *data = adt7473_update_device(dev);
617 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
618 }
619
620 static ssize_t set_pwm_max(struct device *dev,
621 struct device_attribute *devattr,
622 const char *buf,
623 size_t count)
624 {
625 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
626 struct i2c_client *client = to_i2c_client(dev);
627 struct adt7473_data *data = i2c_get_clientdata(client);
628 int temp = simple_strtol(buf, NULL, 10);
629
630 mutex_lock(&data->lock);
631 data->pwm_max[attr->index] = temp;
632 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MAX(attr->index),
633 temp);
634 mutex_unlock(&data->lock);
635
636 return count;
637 }
638
639 static ssize_t show_pwm_min(struct device *dev,
640 struct device_attribute *devattr,
641 char *buf)
642 {
643 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
644 struct adt7473_data *data = adt7473_update_device(dev);
645 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
646 }
647
648 static ssize_t set_pwm_min(struct device *dev,
649 struct device_attribute *devattr,
650 const char *buf,
651 size_t count)
652 {
653 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
654 struct i2c_client *client = to_i2c_client(dev);
655 struct adt7473_data *data = i2c_get_clientdata(client);
656 int temp = simple_strtol(buf, NULL, 10);
657
658 mutex_lock(&data->lock);
659 data->pwm_min[attr->index] = temp;
660 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MIN(attr->index),
661 temp);
662 mutex_unlock(&data->lock);
663
664 return count;
665 }
666
667 static ssize_t show_temp_tmax(struct device *dev,
668 struct device_attribute *devattr,
669 char *buf)
670 {
671 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
672 struct adt7473_data *data = adt7473_update_device(dev);
673 return sprintf(buf, "%d\n", 1000 * decode_temp(
674 data->temp_twos_complement,
675 data->temp_tmax[attr->index]));
676 }
677
678 static ssize_t set_temp_tmax(struct device *dev,
679 struct device_attribute *devattr,
680 const char *buf,
681 size_t count)
682 {
683 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
684 struct i2c_client *client = to_i2c_client(dev);
685 struct adt7473_data *data = i2c_get_clientdata(client);
686 int temp = simple_strtol(buf, NULL, 10) / 1000;
687 temp = encode_temp(data->temp_twos_complement, temp);
688
689 mutex_lock(&data->lock);
690 data->temp_tmax[attr->index] = temp;
691 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMAX(attr->index),
692 temp);
693 mutex_unlock(&data->lock);
694
695 return count;
696 }
697
698 static ssize_t show_temp_tmin(struct device *dev,
699 struct device_attribute *devattr,
700 char *buf)
701 {
702 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
703 struct adt7473_data *data = adt7473_update_device(dev);
704 return sprintf(buf, "%d\n", 1000 * decode_temp(
705 data->temp_twos_complement,
706 data->temp_tmin[attr->index]));
707 }
708
709 static ssize_t set_temp_tmin(struct device *dev,
710 struct device_attribute *devattr,
711 const char *buf,
712 size_t count)
713 {
714 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
715 struct i2c_client *client = to_i2c_client(dev);
716 struct adt7473_data *data = i2c_get_clientdata(client);
717 int temp = simple_strtol(buf, NULL, 10) / 1000;
718 temp = encode_temp(data->temp_twos_complement, temp);
719
720 mutex_lock(&data->lock);
721 data->temp_tmin[attr->index] = temp;
722 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMIN(attr->index),
723 temp);
724 mutex_unlock(&data->lock);
725
726 return count;
727 }
728
729 static ssize_t show_pwm_enable(struct device *dev,
730 struct device_attribute *devattr,
731 char *buf)
732 {
733 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
734 struct adt7473_data *data = adt7473_update_device(dev);
735
736 switch (data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT) {
737 case 3:
738 return sprintf(buf, "0\n");
739 case 7:
740 return sprintf(buf, "1\n");
741 default:
742 return sprintf(buf, "2\n");
743 }
744 }
745
746 static ssize_t set_pwm_enable(struct device *dev,
747 struct device_attribute *devattr,
748 const char *buf,
749 size_t count)
750 {
751 u8 reg;
752 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
753 struct i2c_client *client = to_i2c_client(dev);
754 struct adt7473_data *data = i2c_get_clientdata(client);
755 int temp = simple_strtol(buf, NULL, 10);
756
757 switch (temp) {
758 case 0:
759 temp = 3;
760 break;
761 case 1:
762 temp = 7;
763 break;
764 case 2:
765 /* Enter automatic mode with fans off */
766 temp = 4;
767 break;
768 default:
769 return -EINVAL;
770 }
771
772 mutex_lock(&data->lock);
773 reg = i2c_smbus_read_byte_data(client,
774 ADT7473_REG_PWM_BHVR(attr->index));
775 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
776 (reg & ~ADT7473_PWM_BHVR_MASK);
777 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
778 reg);
779 data->pwm_behavior[attr->index] = reg;
780 mutex_unlock(&data->lock);
781
782 return count;
783 }
784
785 static ssize_t show_pwm_auto_temp(struct device *dev,
786 struct device_attribute *devattr,
787 char *buf)
788 {
789 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
790 struct adt7473_data *data = adt7473_update_device(dev);
791 int bhvr = data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT;
792
793 switch (bhvr) {
794 case 3:
795 case 4:
796 case 7:
797 return sprintf(buf, "0\n");
798 case 0:
799 case 1:
800 case 5:
801 case 6:
802 return sprintf(buf, "%d\n", bhvr + 1);
803 case 2:
804 return sprintf(buf, "4\n");
805 }
806 /* shouldn't ever get here */
807 BUG();
808 }
809
810 static ssize_t set_pwm_auto_temp(struct device *dev,
811 struct device_attribute *devattr,
812 const char *buf,
813 size_t count)
814 {
815 u8 reg;
816 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
817 struct i2c_client *client = to_i2c_client(dev);
818 struct adt7473_data *data = i2c_get_clientdata(client);
819 int temp = simple_strtol(buf, NULL, 10);
820
821 switch (temp) {
822 case 1:
823 case 2:
824 case 6:
825 case 7:
826 temp--;
827 break;
828 case 0:
829 temp = 4;
830 break;
831 default:
832 return -EINVAL;
833 }
834
835 mutex_lock(&data->lock);
836 reg = i2c_smbus_read_byte_data(client,
837 ADT7473_REG_PWM_BHVR(attr->index));
838 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
839 (reg & ~ADT7473_PWM_BHVR_MASK);
840 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
841 reg);
842 data->pwm_behavior[attr->index] = reg;
843 mutex_unlock(&data->lock);
844
845 return count;
846 }
847
848 static ssize_t show_alarm(struct device *dev,
849 struct device_attribute *devattr,
850 char *buf)
851 {
852 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
853 struct adt7473_data *data = adt7473_update_device(dev);
854
855 if (data->alarm & attr->index)
856 return sprintf(buf, "1\n");
857 else
858 return sprintf(buf, "0\n");
859 }
860
861
862 static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_volt_max,
863 set_volt_max, 0);
864 static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_volt_max,
865 set_volt_max, 1);
866
867 static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_volt_min,
868 set_volt_min, 0);
869 static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_volt_min,
870 set_volt_min, 1);
871
872 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_volt, NULL, 0);
873 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_volt, NULL, 1);
874
875 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL,
876 ADT7473_VCCP_ALARM);
877 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL,
878 ADT7473_VCC_ALARM);
879
880 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
881 set_temp_max, 0);
882 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
883 set_temp_max, 1);
884 static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
885 set_temp_max, 2);
886
887 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
888 set_temp_min, 0);
889 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
890 set_temp_min, 1);
891 static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
892 set_temp_min, 2);
893
894 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
895 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
896 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
897
898 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
899 ADT7473_R1T_ALARM | ALARM2(ADT7473_R1T_SHORT));
900 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
901 ADT7473_LT_ALARM);
902 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
903 ADT7473_R2T_ALARM | ALARM2(ADT7473_R2T_SHORT));
904
905 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
906 set_fan_min, 0);
907 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
908 set_fan_min, 1);
909 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
910 set_fan_min, 2);
911 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
912 set_fan_min, 3);
913
914 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
915 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
916 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
917 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
918
919 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
920 ALARM2(ADT7473_FAN1_ALARM));
921 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
922 ALARM2(ADT7473_FAN2_ALARM));
923 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
924 ALARM2(ADT7473_FAN3_ALARM));
925 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
926 ALARM2(ADT7473_FAN4_ALARM));
927
928 static SENSOR_DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO,
929 show_max_duty_at_crit, set_max_duty_at_crit, 0);
930
931 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
932 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
933 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
934
935 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
936 show_pwm_min, set_pwm_min, 0);
937 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
938 show_pwm_min, set_pwm_min, 1);
939 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
940 show_pwm_min, set_pwm_min, 2);
941
942 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
943 show_pwm_max, set_pwm_max, 0);
944 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
945 show_pwm_max, set_pwm_max, 1);
946 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
947 show_pwm_max, set_pwm_max, 2);
948
949 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, S_IWUSR | S_IRUGO,
950 show_temp_tmin, set_temp_tmin, 0);
951 static SENSOR_DEVICE_ATTR(temp2_auto_point1_temp, S_IWUSR | S_IRUGO,
952 show_temp_tmin, set_temp_tmin, 1);
953 static SENSOR_DEVICE_ATTR(temp3_auto_point1_temp, S_IWUSR | S_IRUGO,
954 show_temp_tmin, set_temp_tmin, 2);
955
956 static SENSOR_DEVICE_ATTR(temp1_auto_point2_temp, S_IWUSR | S_IRUGO,
957 show_temp_tmax, set_temp_tmax, 0);
958 static SENSOR_DEVICE_ATTR(temp2_auto_point2_temp, S_IWUSR | S_IRUGO,
959 show_temp_tmax, set_temp_tmax, 1);
960 static SENSOR_DEVICE_ATTR(temp3_auto_point2_temp, S_IWUSR | S_IRUGO,
961 show_temp_tmax, set_temp_tmax, 2);
962
963 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
964 set_pwm_enable, 0);
965 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
966 set_pwm_enable, 1);
967 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
968 set_pwm_enable, 2);
969
970 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
971 show_pwm_auto_temp, set_pwm_auto_temp, 0);
972 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
973 show_pwm_auto_temp, set_pwm_auto_temp, 1);
974 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
975 show_pwm_auto_temp, set_pwm_auto_temp, 2);
976
977 static struct attribute *adt7473_attr[] =
978 {
979 &sensor_dev_attr_in1_max.dev_attr.attr,
980 &sensor_dev_attr_in2_max.dev_attr.attr,
981 &sensor_dev_attr_in1_min.dev_attr.attr,
982 &sensor_dev_attr_in2_min.dev_attr.attr,
983 &sensor_dev_attr_in1_input.dev_attr.attr,
984 &sensor_dev_attr_in2_input.dev_attr.attr,
985 &sensor_dev_attr_in1_alarm.dev_attr.attr,
986 &sensor_dev_attr_in2_alarm.dev_attr.attr,
987
988 &sensor_dev_attr_temp1_max.dev_attr.attr,
989 &sensor_dev_attr_temp2_max.dev_attr.attr,
990 &sensor_dev_attr_temp3_max.dev_attr.attr,
991 &sensor_dev_attr_temp1_min.dev_attr.attr,
992 &sensor_dev_attr_temp2_min.dev_attr.attr,
993 &sensor_dev_attr_temp3_min.dev_attr.attr,
994 &sensor_dev_attr_temp1_input.dev_attr.attr,
995 &sensor_dev_attr_temp2_input.dev_attr.attr,
996 &sensor_dev_attr_temp3_input.dev_attr.attr,
997 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
998 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
999 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1000 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
1001 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
1002 &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
1003 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
1004 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
1005 &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
1006
1007 &sensor_dev_attr_fan1_min.dev_attr.attr,
1008 &sensor_dev_attr_fan2_min.dev_attr.attr,
1009 &sensor_dev_attr_fan3_min.dev_attr.attr,
1010 &sensor_dev_attr_fan4_min.dev_attr.attr,
1011 &sensor_dev_attr_fan1_input.dev_attr.attr,
1012 &sensor_dev_attr_fan2_input.dev_attr.attr,
1013 &sensor_dev_attr_fan3_input.dev_attr.attr,
1014 &sensor_dev_attr_fan4_input.dev_attr.attr,
1015 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1016 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1017 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1018 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1019
1020 &sensor_dev_attr_pwm_use_point2_pwm_at_crit.dev_attr.attr,
1021
1022 &sensor_dev_attr_pwm1.dev_attr.attr,
1023 &sensor_dev_attr_pwm2.dev_attr.attr,
1024 &sensor_dev_attr_pwm3.dev_attr.attr,
1025 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1026 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1027 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1028 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1029 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1030 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1031
1032 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1033 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1034 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1035 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1036 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1037 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1038
1039 NULL
1040 };
1041
1042 static int adt7473_attach_adapter(struct i2c_adapter *adapter)
1043 {
1044 if (!(adapter->class & I2C_CLASS_HWMON))
1045 return 0;
1046 return i2c_probe(adapter, &addr_data, adt7473_detect);
1047 }
1048
1049 static int adt7473_detect(struct i2c_adapter *adapter, int address, int kind)
1050 {
1051 struct i2c_client *client;
1052 struct adt7473_data *data;
1053 int err = 0;
1054
1055 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1056 goto exit;
1057
1058 data = kzalloc(sizeof(struct adt7473_data), GFP_KERNEL);
1059 if (!data) {
1060 err = -ENOMEM;
1061 goto exit;
1062 }
1063
1064 client = &data->client;
1065 client->addr = address;
1066 client->adapter = adapter;
1067 client->driver = &adt7473_driver;
1068
1069 i2c_set_clientdata(client, data);
1070
1071 mutex_init(&data->lock);
1072
1073 if (kind <= 0) {
1074 int vendor, device, revision;
1075
1076 vendor = i2c_smbus_read_byte_data(client, ADT7473_REG_VENDOR);
1077 if (vendor != ADT7473_VENDOR) {
1078 err = -ENODEV;
1079 goto exit_free;
1080 }
1081
1082 device = i2c_smbus_read_byte_data(client, ADT7473_REG_DEVICE);
1083 if (device != ADT7473_DEVICE) {
1084 err = -ENODEV;
1085 goto exit_free;
1086 }
1087
1088 revision = i2c_smbus_read_byte_data(client,
1089 ADT7473_REG_REVISION);
1090 if (revision != ADT7473_REV_68 && revision != ADT7473_REV_69) {
1091 err = -ENODEV;
1092 goto exit_free;
1093 }
1094 } else
1095 dev_dbg(&adapter->dev, "detection forced\n");
1096
1097 strlcpy(client->name, "adt7473", I2C_NAME_SIZE);
1098
1099 err = i2c_attach_client(client);
1100 if (err)
1101 goto exit_free;
1102
1103 dev_info(&client->dev, "%s chip found\n", client->name);
1104
1105 /* Initialize the ADT7473 chip */
1106 adt7473_init_client(client);
1107
1108 /* Register sysfs hooks */
1109 data->attrs.attrs = adt7473_attr;
1110 err = sysfs_create_group(&client->dev.kobj, &data->attrs);
1111 if (err)
1112 goto exit_detach;
1113
1114 data->hwmon_dev = hwmon_device_register(&client->dev);
1115 if (IS_ERR(data->hwmon_dev)) {
1116 err = PTR_ERR(data->hwmon_dev);
1117 goto exit_remove;
1118 }
1119
1120 return 0;
1121
1122 exit_remove:
1123 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1124 exit_detach:
1125 i2c_detach_client(client);
1126 exit_free:
1127 kfree(data);
1128 exit:
1129 return err;
1130 }
1131
1132 static int adt7473_detach_client(struct i2c_client *client)
1133 {
1134 struct adt7473_data *data = i2c_get_clientdata(client);
1135
1136 hwmon_device_unregister(data->hwmon_dev);
1137 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1138 i2c_detach_client(client);
1139 kfree(data);
1140 return 0;
1141 }
1142
1143 static int __init adt7473_init(void)
1144 {
1145 return i2c_add_driver(&adt7473_driver);
1146 }
1147
1148 static void __exit adt7473_exit(void)
1149 {
1150 i2c_del_driver(&adt7473_driver);
1151 }
1152
1153 MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
1154 MODULE_DESCRIPTION("ADT7473 driver");
1155 MODULE_LICENSE("GPL");
1156
1157 module_init(adt7473_init);
1158 module_exit(adt7473_exit);
x86 "subsystem" repository