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(struct adt7473_data *data, u8 raw)
426 {
427 if (data->temp_twos_complement)
428 return (s8)raw;
429 return raw - 64;
430 }
431
432 static u8 encode_temp(struct adt7473_data *data, int cooked)
433 {
434 if (data->temp_twos_complement)
435 return (cooked & 0xFF);
436 return cooked + 64;
437 }
438
439 static ssize_t show_temp_min(struct device *dev,
440 struct device_attribute *devattr,
441 char *buf)
442 {
443 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
444 struct adt7473_data *data = adt7473_update_device(dev);
445 return sprintf(buf, "%d\n",
446 1000 * decode_temp(data, data->temp_min[attr->index]));
447 }
448
449 static ssize_t set_temp_min(struct device *dev,
450 struct device_attribute *devattr,
451 const char *buf,
452 size_t count)
453 {
454 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
455 struct i2c_client *client = to_i2c_client(dev);
456 struct adt7473_data *data = i2c_get_clientdata(client);
457 int temp = simple_strtol(buf, NULL, 10) / 1000;
458 temp = encode_temp(data, temp);
459
460 mutex_lock(&data->lock);
461 data->temp_min[attr->index] = temp;
462 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MIN(attr->index),
463 temp);
464 mutex_unlock(&data->lock);
465
466 return count;
467 }
468
469 static ssize_t show_temp_max(struct device *dev,
470 struct device_attribute *devattr,
471 char *buf)
472 {
473 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
474 struct adt7473_data *data = adt7473_update_device(dev);
475 return sprintf(buf, "%d\n",
476 1000 * decode_temp(data, data->temp_max[attr->index]));
477 }
478
479 static ssize_t set_temp_max(struct device *dev,
480 struct device_attribute *devattr,
481 const char *buf,
482 size_t count)
483 {
484 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
485 struct i2c_client *client = to_i2c_client(dev);
486 struct adt7473_data *data = i2c_get_clientdata(client);
487 int temp = simple_strtol(buf, NULL, 10) / 1000;
488 temp = encode_temp(data, temp);
489
490 mutex_lock(&data->lock);
491 data->temp_max[attr->index] = temp;
492 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MAX(attr->index),
493 temp);
494 mutex_unlock(&data->lock);
495
496 return count;
497 }
498
499 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
500 char *buf)
501 {
502 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
503 struct adt7473_data *data = adt7473_update_device(dev);
504 return sprintf(buf, "%d\n",
505 1000 * decode_temp(data, data->temp[attr->index]));
506 }
507
508 static ssize_t show_fan_min(struct device *dev,
509 struct device_attribute *devattr,
510 char *buf)
511 {
512 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
513 struct adt7473_data *data = adt7473_update_device(dev);
514
515 if (FAN_DATA_VALID(data->fan_min[attr->index]))
516 return sprintf(buf, "%d\n",
517 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
518 else
519 return sprintf(buf, "\n");
520 }
521
522 static ssize_t set_fan_min(struct device *dev,
523 struct device_attribute *devattr,
524 const char *buf, size_t count)
525 {
526 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
527 struct i2c_client *client = to_i2c_client(dev);
528 struct adt7473_data *data = i2c_get_clientdata(client);
529 int temp = simple_strtol(buf, NULL, 10);
530
531 if (!temp)
532 return -EINVAL;
533 temp = FAN_RPM_TO_PERIOD(temp);
534
535 mutex_lock(&data->lock);
536 data->fan_min[attr->index] = temp;
537 adt7473_write_word_data(client, ADT7473_REG_FAN_MIN(attr->index), temp);
538 mutex_unlock(&data->lock);
539
540 return count;
541 }
542
543 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
544 char *buf)
545 {
546 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
547 struct adt7473_data *data = adt7473_update_device(dev);
548
549 if (FAN_DATA_VALID(data->fan[attr->index]))
550 return sprintf(buf, "%d\n",
551 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
552 else
553 return sprintf(buf, "\n");
554 }
555
556 static ssize_t show_max_duty_at_crit(struct device *dev,
557 struct device_attribute *devattr,
558 char *buf)
559 {
560 struct adt7473_data *data = adt7473_update_device(dev);
561 return sprintf(buf, "%d\n", data->max_duty_at_overheat);
562 }
563
564 static ssize_t set_max_duty_at_crit(struct device *dev,
565 struct device_attribute *devattr,
566 const char *buf,
567 size_t count)
568 {
569 u8 reg;
570 struct i2c_client *client = to_i2c_client(dev);
571 struct adt7473_data *data = i2c_get_clientdata(client);
572 int temp = simple_strtol(buf, NULL, 10);
573 temp = temp && 0xFF;
574
575 mutex_lock(&data->lock);
576 data->max_duty_at_overheat = temp;
577 reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
578 if (temp)
579 reg |= ADT7473_CFG4_MAX_DUTY_AT_OVT;
580 else
581 reg &= ~ADT7473_CFG4_MAX_DUTY_AT_OVT;
582 i2c_smbus_write_byte_data(client, ADT7473_REG_CFG4, reg);
583 mutex_unlock(&data->lock);
584
585 return count;
586 }
587
588 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
589 char *buf)
590 {
591 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
592 struct adt7473_data *data = adt7473_update_device(dev);
593 return sprintf(buf, "%d\n", data->pwm[attr->index]);
594 }
595
596 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
597 const char *buf, size_t count)
598 {
599 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
600 struct i2c_client *client = to_i2c_client(dev);
601 struct adt7473_data *data = i2c_get_clientdata(client);
602 int temp = simple_strtol(buf, NULL, 10);
603
604 mutex_lock(&data->lock);
605 data->pwm[attr->index] = temp;
606 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM(attr->index), temp);
607 mutex_unlock(&data->lock);
608
609 return count;
610 }
611
612 static ssize_t show_pwm_max(struct device *dev,
613 struct device_attribute *devattr,
614 char *buf)
615 {
616 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
617 struct adt7473_data *data = adt7473_update_device(dev);
618 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
619 }
620
621 static ssize_t set_pwm_max(struct device *dev,
622 struct device_attribute *devattr,
623 const char *buf,
624 size_t count)
625 {
626 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
627 struct i2c_client *client = to_i2c_client(dev);
628 struct adt7473_data *data = i2c_get_clientdata(client);
629 int temp = simple_strtol(buf, NULL, 10);
630
631 mutex_lock(&data->lock);
632 data->pwm_max[attr->index] = temp;
633 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MAX(attr->index),
634 temp);
635 mutex_unlock(&data->lock);
636
637 return count;
638 }
639
640 static ssize_t show_pwm_min(struct device *dev,
641 struct device_attribute *devattr,
642 char *buf)
643 {
644 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
645 struct adt7473_data *data = adt7473_update_device(dev);
646 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
647 }
648
649 static ssize_t set_pwm_min(struct device *dev,
650 struct device_attribute *devattr,
651 const char *buf,
652 size_t count)
653 {
654 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
655 struct i2c_client *client = to_i2c_client(dev);
656 struct adt7473_data *data = i2c_get_clientdata(client);
657 int temp = simple_strtol(buf, NULL, 10);
658
659 mutex_lock(&data->lock);
660 data->pwm_min[attr->index] = temp;
661 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MIN(attr->index),
662 temp);
663 mutex_unlock(&data->lock);
664
665 return count;
666 }
667
668 static ssize_t show_temp_tmax(struct device *dev,
669 struct device_attribute *devattr,
670 char *buf)
671 {
672 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
673 struct adt7473_data *data = adt7473_update_device(dev);
674 return sprintf(buf, "%d\n",
675 1000 * decode_temp(data, 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);
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",
705 1000 * decode_temp(data, data->temp_tmin[attr->index]));
706 }
707
708 static ssize_t set_temp_tmin(struct device *dev,
709 struct device_attribute *devattr,
710 const char *buf,
711 size_t count)
712 {
713 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
714 struct i2c_client *client = to_i2c_client(dev);
715 struct adt7473_data *data = i2c_get_clientdata(client);
716 int temp = simple_strtol(buf, NULL, 10) / 1000;
717 temp = encode_temp(data, temp);
718
719 mutex_lock(&data->lock);
720 data->temp_tmin[attr->index] = temp;
721 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMIN(attr->index),
722 temp);
723 mutex_unlock(&data->lock);
724
725 return count;
726 }
727
728 static ssize_t show_pwm_enable(struct device *dev,
729 struct device_attribute *devattr,
730 char *buf)
731 {
732 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
733 struct adt7473_data *data = adt7473_update_device(dev);
734
735 switch (data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT) {
736 case 3:
737 return sprintf(buf, "\n");
738 case 7:
739 return sprintf(buf, "1\n");
740 default:
741 return sprintf(buf, "2\n");
742 }
743 }
744
745 static ssize_t set_pwm_enable(struct device *dev,
746 struct device_attribute *devattr,
747 const char *buf,
748 size_t count)
749 {
750 u8 reg;
751 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
752 struct i2c_client *client = to_i2c_client(dev);
753 struct adt7473_data *data = i2c_get_clientdata(client);
754 int temp = simple_strtol(buf, NULL, 10);
755
756 switch (temp) {
757 case 0:
758 temp = 3;
759 break;
760 case 1:
761 temp = 7;
762 break;
763 case 2:
764 /* Enter automatic mode with fans off */
765 temp = 4;
766 break;
767 default:
768 return -EINVAL;
769 }
770
771 mutex_lock(&data->lock);
772 reg = i2c_smbus_read_byte_data(client,
773 ADT7473_REG_PWM_BHVR(attr->index));
774 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
775 (reg & ~ADT7473_PWM_BHVR_MASK);
776 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
777 reg);
778 data->pwm_behavior[attr->index] = reg;
779 mutex_unlock(&data->lock);
780
781 return count;
782 }
783
784 static ssize_t show_pwm_auto_temp(struct device *dev,
785 struct device_attribute *devattr,
786 char *buf)
787 {
788 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
789 struct adt7473_data *data = adt7473_update_device(dev);
790 int bhvr = data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT;
791
792 switch (bhvr) {
793 case 3:
794 case 4:
795 case 7:
796 return sprintf(buf, "\n");
797 case 0:
798 case 1:
799 case 5:
800 case 6:
801 return sprintf(buf, "%d\n", bhvr + 1);
802 case 2:
803 return sprintf(buf, "4\n");
804 }
805 /* shouldn't ever get here */
806 BUG();
807 }
808
809 static ssize_t set_pwm_auto_temp(struct device *dev,
810 struct device_attribute *devattr,
811 const char *buf,
812 size_t count)
813 {
814 u8 reg;
815 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
816 struct i2c_client *client = to_i2c_client(dev);
817 struct adt7473_data *data = i2c_get_clientdata(client);
818 int temp = simple_strtol(buf, NULL, 10);
819
820 switch (temp) {
821 case 1:
822 case 2:
823 case 6:
824 case 7:
825 temp--;
826 break;
827 case 0:
828 temp = 4;
829 break;
830 default:
831 return -EINVAL;
832 }
833
834 mutex_lock(&data->lock);
835 reg = i2c_smbus_read_byte_data(client,
836 ADT7473_REG_PWM_BHVR(attr->index));
837 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
838 (reg & ~ADT7473_PWM_BHVR_MASK);
839 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
840 reg);
841 data->pwm_behavior[attr->index] = reg;
842 mutex_unlock(&data->lock);
843
844 return count;
845 }
846
847 static ssize_t show_alarm(struct device *dev,
848 struct device_attribute *devattr,
849 char *buf)
850 {
851 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
852 struct adt7473_data *data = adt7473_update_device(dev);
853
854 if (data->alarm & attr->index)
855 return sprintf(buf, "1\n");
856 else
857 return sprintf(buf, "\n");
858 }
859
860
861 static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_volt_max,
862 set_volt_max, 0);
863 static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_volt_max,
864 set_volt_max, 1);
865
866 static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_volt_min,
867 set_volt_min, 0);
868 static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_volt_min,
869 set_volt_min, 1);
870
871 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_volt, NULL, 0);
872 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_volt, NULL, 1);
873
874 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL,
875 ADT7473_VCCP_ALARM);
876 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL,
877 ADT7473_VCC_ALARM);
878
879 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
880 set_temp_max, 0);
881 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
882 set_temp_max, 1);
883 static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
884 set_temp_max, 2);
885
886 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
887 set_temp_min, 0);
888 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
889 set_temp_min, 1);
890 static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
891 set_temp_min, 2);
892
893 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
894 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
895 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
896
897 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
898 ADT7473_R1T_ALARM | ALARM2(ADT7473_R1T_SHORT));
899 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
900 ADT7473_LT_ALARM);
901 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
902 ADT7473_R2T_ALARM | ALARM2(ADT7473_R2T_SHORT));
903
904 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
905 set_fan_min, 0);
906 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
907 set_fan_min, 1);
908 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
909 set_fan_min, 2);
910 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
911 set_fan_min, 3);
912
913 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
914 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
915 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
916 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
917
918 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
919 ALARM2(ADT7473_FAN1_ALARM));
920 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
921 ALARM2(ADT7473_FAN2_ALARM));
922 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
923 ALARM2(ADT7473_FAN3_ALARM));
924 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
925 ALARM2(ADT7473_FAN4_ALARM));
926
927 static SENSOR_DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO,
928 show_max_duty_at_crit, set_max_duty_at_crit, 0);
929
930 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
931 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
932 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
933
934 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
935 show_pwm_min, set_pwm_min, 0);
936 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
937 show_pwm_min, set_pwm_min, 1);
938 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
939 show_pwm_min, set_pwm_min, 2);
940
941 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
942 show_pwm_max, set_pwm_max, 0);
943 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
944 show_pwm_max, set_pwm_max, 1);
945 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
946 show_pwm_max, set_pwm_max, 2);
947
948 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, S_IWUSR | S_IRUGO,
949 show_temp_tmin, set_temp_tmin, 0);
950 static SENSOR_DEVICE_ATTR(temp2_auto_point1_temp, S_IWUSR | S_IRUGO,
951 show_temp_tmin, set_temp_tmin, 1);
952 static SENSOR_DEVICE_ATTR(temp3_auto_point1_temp, S_IWUSR | S_IRUGO,
953 show_temp_tmin, set_temp_tmin, 2);
954
955 static SENSOR_DEVICE_ATTR(temp1_auto_point2_temp, S_IWUSR | S_IRUGO,
956 show_temp_tmax, set_temp_tmax, 0);
957 static SENSOR_DEVICE_ATTR(temp2_auto_point2_temp, S_IWUSR | S_IRUGO,
958 show_temp_tmax, set_temp_tmax, 1);
959 static SENSOR_DEVICE_ATTR(temp3_auto_point2_temp, S_IWUSR | S_IRUGO,
960 show_temp_tmax, set_temp_tmax, 2);
961
962 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
963 set_pwm_enable, 0);
964 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
965 set_pwm_enable, 1);
966 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
967 set_pwm_enable, 2);
968
969 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
970 show_pwm_auto_temp, set_pwm_auto_temp, 0);
971 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
972 show_pwm_auto_temp, set_pwm_auto_temp, 1);
973 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
974 show_pwm_auto_temp, set_pwm_auto_temp, 2);
975
976 static struct attribute *adt7473_attr[] =
977 {
978 &sensor_dev_attr_in1_max.dev_attr.attr,
979 &sensor_dev_attr_in2_max.dev_attr.attr,
980 &sensor_dev_attr_in1_min.dev_attr.attr,
981 &sensor_dev_attr_in2_min.dev_attr.attr,
982 &sensor_dev_attr_in1_input.dev_attr.attr,
983 &sensor_dev_attr_in2_input.dev_attr.attr,
984 &sensor_dev_attr_in1_alarm.dev_attr.attr,
985 &sensor_dev_attr_in2_alarm.dev_attr.attr,
986
987 &sensor_dev_attr_temp1_max.dev_attr.attr,
988 &sensor_dev_attr_temp2_max.dev_attr.attr,
989 &sensor_dev_attr_temp3_max.dev_attr.attr,
990 &sensor_dev_attr_temp1_min.dev_attr.attr,
991 &sensor_dev_attr_temp2_min.dev_attr.attr,
992 &sensor_dev_attr_temp3_min.dev_attr.attr,
993 &sensor_dev_attr_temp1_input.dev_attr.attr,
994 &sensor_dev_attr_temp2_input.dev_attr.attr,
995 &sensor_dev_attr_temp3_input.dev_attr.attr,
996 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
997 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
998 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
999 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
1000 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
1001 &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
1002 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
1003 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
1004 &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
1005
1006 &sensor_dev_attr_fan1_min.dev_attr.attr,
1007 &sensor_dev_attr_fan2_min.dev_attr.attr,
1008 &sensor_dev_attr_fan3_min.dev_attr.attr,
1009 &sensor_dev_attr_fan4_min.dev_attr.attr,
1010 &sensor_dev_attr_fan1_input.dev_attr.attr,
1011 &sensor_dev_attr_fan2_input.dev_attr.attr,
1012 &sensor_dev_attr_fan3_input.dev_attr.attr,
1013 &sensor_dev_attr_fan4_input.dev_attr.attr,
1014 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1015 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1016 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1017 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1018
1019 &sensor_dev_attr_pwm_use_point2_pwm_at_crit.dev_attr.attr,
1020
1021 &sensor_dev_attr_pwm1.dev_attr.attr,
1022 &sensor_dev_attr_pwm2.dev_attr.attr,
1023 &sensor_dev_attr_pwm3.dev_attr.attr,
1024 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1025 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1026 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1027 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1028 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1029 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1030
1031 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1032 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1033 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1034 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1035 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1036 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1037
1038 NULL
1039 };
1040
1041 static int adt7473_attach_adapter(struct i2c_adapter *adapter)
1042 {
1043 if (!(adapter->class & I2C_CLASS_HWMON))
1044 return 0;
1045 return i2c_probe(adapter, &addr_data, adt7473_detect);
1046 }
1047
1048 static int adt7473_detect(struct i2c_adapter *adapter, int address, int kind)
1049 {
1050 struct i2c_client *client;
1051 struct adt7473_data *data;
1052 int err = 0;
1053
1054 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1055 goto exit;
1056
1057 data = kzalloc(sizeof(struct adt7473_data), GFP_KERNEL);
1058 if (!data) {
1059 err = -ENOMEM;
1060 goto exit;
1061 }
1062
1063 client = &data->client;
1064 client->addr = address;
1065 client->adapter = adapter;
1066 client->driver = &adt7473_driver;
1067
1068 i2c_set_clientdata(client, data);
1069
1070 mutex_init(&data->lock);
1071
1072 if (kind <= 0) {
1073 int vendor, device, revision;
1074
1075 vendor = i2c_smbus_read_byte_data(client, ADT7473_REG_VENDOR);
1076 if (vendor != ADT7473_VENDOR) {
1077 err = -ENODEV;
1078 goto exit_free;
1079 }
1080
1081 device = i2c_smbus_read_byte_data(client, ADT7473_REG_DEVICE);
1082 if (device != ADT7473_DEVICE) {
1083 err = -ENODEV;
1084 goto exit_free;
1085 }
1086
1087 revision = i2c_smbus_read_byte_data(client,
1088 ADT7473_REG_REVISION);
1089 if (revision != ADT7473_REV_68 && revision != ADT7473_REV_69) {
1090 err = -ENODEV;
1091 goto exit_free;
1092 }
1093 } else
1094 dev_dbg(&adapter->dev, "detection forced\n");
1095
1096 strlcpy(client->name, "adt7473", I2C_NAME_SIZE);
1097
1098 err = i2c_attach_client(client);
1099 if (err)
1100 goto exit_free;
1101
1102 dev_info(&client->dev, "%s chip found\n", client->name);
1103
1104 /* Initialize the ADT7473 chip */
1105 adt7473_init_client(client);
1106
1107 /* Register sysfs hooks */
1108 data->attrs.attrs = adt7473_attr;
1109 err = sysfs_create_group(&client->dev.kobj, &data->attrs);
1110 if (err)
1111 goto exit_detach;
1112
1113 data->hwmon_dev = hwmon_device_register(&client->dev);
1114 if (IS_ERR(data->hwmon_dev)) {
1115 err = PTR_ERR(data->hwmon_dev);
1116 goto exit_remove;
1117 }
1118
1119 return 0;
1120
1121 exit_remove:
1122 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1123 exit_detach:
1124 i2c_detach_client(client);
1125 exit_free:
1126 kfree(data);
1127 exit:
1128 return err;
1129 }
1130
1131 static int adt7473_detach_client(struct i2c_client *client)
1132 {
1133 struct adt7473_data *data = i2c_get_clientdata(client);
1134
1135 hwmon_device_unregister(data->hwmon_dev);
1136 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1137 i2c_detach_client(client);
1138 kfree(data);
1139 return 0;
1140 }
1141
1142 static int __init adt7473_init(void)
1143 {
1144 return i2c_add_driver(&adt7473_driver);
1145 }
1146
1147 static void __exit adt7473_exit(void)
1148 {
1149 i2c_del_driver(&adt7473_driver);
1150 }
1151
1152 MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
1153 MODULE_DESCRIPTION("ADT7473 driver");
1154 MODULE_LICENSE("GPL");
1155
1156 module_init(adt7473_init);
1157 module_exit(adt7473_exit);
1158
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