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Merge branch 'linus' into x86/cleanups
[deliverable/linux.git] / drivers / hwmon / adt7473.c
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 i = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
313 data->max_duty_at_overheat = !!(i & ADT7473_CFG4_MAX_DUTY_AT_OVT);
314
315 data->limits_last_updated = local_jiffies;
316 data->limits_valid = 1;
317
318 out:
319 mutex_unlock(&data->lock);
320 return data;
321 }
322
323 /*
324 * On this chip, voltages are given as a count of steps between a minimum
325 * and maximum voltage, not a direct voltage.
326 */
327 static const int volt_convert_table[][2] = {
328 {2997, 3},
329 {4395, 4},
330 };
331
332 static int decode_volt(int volt_index, u8 raw)
333 {
334 int cmax = volt_convert_table[volt_index][0];
335 int cmin = volt_convert_table[volt_index][1];
336 return ((raw * (cmax - cmin)) / 255) + cmin;
337 }
338
339 static u8 encode_volt(int volt_index, int cooked)
340 {
341 int cmax = volt_convert_table[volt_index][0];
342 int cmin = volt_convert_table[volt_index][1];
343 u8 x;
344
345 if (cooked > cmax)
346 cooked = cmax;
347 else if (cooked < cmin)
348 cooked = cmin;
349
350 x = ((cooked - cmin) * 255) / (cmax - cmin);
351
352 return x;
353 }
354
355 static ssize_t show_volt_min(struct device *dev,
356 struct device_attribute *devattr,
357 char *buf)
358 {
359 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
360 struct adt7473_data *data = adt7473_update_device(dev);
361 return sprintf(buf, "%d\n",
362 decode_volt(attr->index, data->volt_min[attr->index]));
363 }
364
365 static ssize_t set_volt_min(struct device *dev,
366 struct device_attribute *devattr,
367 const char *buf,
368 size_t count)
369 {
370 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
371 struct i2c_client *client = to_i2c_client(dev);
372 struct adt7473_data *data = i2c_get_clientdata(client);
373 int volt = encode_volt(attr->index, simple_strtol(buf, NULL, 10));
374
375 mutex_lock(&data->lock);
376 data->volt_min[attr->index] = volt;
377 i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MIN(attr->index),
378 volt);
379 mutex_unlock(&data->lock);
380
381 return count;
382 }
383
384 static ssize_t show_volt_max(struct device *dev,
385 struct device_attribute *devattr,
386 char *buf)
387 {
388 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
389 struct adt7473_data *data = adt7473_update_device(dev);
390 return sprintf(buf, "%d\n",
391 decode_volt(attr->index, data->volt_max[attr->index]));
392 }
393
394 static ssize_t set_volt_max(struct device *dev,
395 struct device_attribute *devattr,
396 const char *buf,
397 size_t count)
398 {
399 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
400 struct i2c_client *client = to_i2c_client(dev);
401 struct adt7473_data *data = i2c_get_clientdata(client);
402 int volt = encode_volt(attr->index, simple_strtol(buf, NULL, 10));
403
404 mutex_lock(&data->lock);
405 data->volt_max[attr->index] = volt;
406 i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MAX(attr->index),
407 volt);
408 mutex_unlock(&data->lock);
409
410 return count;
411 }
412
413 static ssize_t show_volt(struct device *dev, struct device_attribute *devattr,
414 char *buf)
415 {
416 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
417 struct adt7473_data *data = adt7473_update_device(dev);
418
419 return sprintf(buf, "%d\n",
420 decode_volt(attr->index, data->volt[attr->index]));
421 }
422
423 /*
424 * This chip can report temperature data either as a two's complement
425 * number in the range -128 to 127, or as an unsigned number that must
426 * be offset by 64.
427 */
428 static int decode_temp(u8 twos_complement, u8 raw)
429 {
430 return twos_complement ? (s8)raw : raw - 64;
431 }
432
433 static u8 encode_temp(u8 twos_complement, int cooked)
434 {
435 return twos_complement ? cooked & 0xFF : cooked + 64;
436 }
437
438 static ssize_t show_temp_min(struct device *dev,
439 struct device_attribute *devattr,
440 char *buf)
441 {
442 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
443 struct adt7473_data *data = adt7473_update_device(dev);
444 return sprintf(buf, "%d\n", 1000 * decode_temp(
445 data->temp_twos_complement,
446 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_twos_complement, 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", 1000 * decode_temp(
476 data->temp_twos_complement,
477 data->temp_max[attr->index]));
478 }
479
480 static ssize_t set_temp_max(struct device *dev,
481 struct device_attribute *devattr,
482 const char *buf,
483 size_t count)
484 {
485 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
486 struct i2c_client *client = to_i2c_client(dev);
487 struct adt7473_data *data = i2c_get_clientdata(client);
488 int temp = simple_strtol(buf, NULL, 10) / 1000;
489 temp = encode_temp(data->temp_twos_complement, temp);
490
491 mutex_lock(&data->lock);
492 data->temp_max[attr->index] = temp;
493 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MAX(attr->index),
494 temp);
495 mutex_unlock(&data->lock);
496
497 return count;
498 }
499
500 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
501 char *buf)
502 {
503 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
504 struct adt7473_data *data = adt7473_update_device(dev);
505 return sprintf(buf, "%d\n", 1000 * decode_temp(
506 data->temp_twos_complement,
507 data->temp[attr->index]));
508 }
509
510 static ssize_t show_fan_min(struct device *dev,
511 struct device_attribute *devattr,
512 char *buf)
513 {
514 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
515 struct adt7473_data *data = adt7473_update_device(dev);
516
517 if (FAN_DATA_VALID(data->fan_min[attr->index]))
518 return sprintf(buf, "%d\n",
519 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
520 else
521 return sprintf(buf, "0\n");
522 }
523
524 static ssize_t set_fan_min(struct device *dev,
525 struct device_attribute *devattr,
526 const char *buf, size_t count)
527 {
528 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
529 struct i2c_client *client = to_i2c_client(dev);
530 struct adt7473_data *data = i2c_get_clientdata(client);
531 int temp = simple_strtol(buf, NULL, 10);
532
533 if (!temp)
534 return -EINVAL;
535 temp = FAN_RPM_TO_PERIOD(temp);
536
537 mutex_lock(&data->lock);
538 data->fan_min[attr->index] = temp;
539 adt7473_write_word_data(client, ADT7473_REG_FAN_MIN(attr->index), temp);
540 mutex_unlock(&data->lock);
541
542 return count;
543 }
544
545 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
546 char *buf)
547 {
548 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
549 struct adt7473_data *data = adt7473_update_device(dev);
550
551 if (FAN_DATA_VALID(data->fan[attr->index]))
552 return sprintf(buf, "%d\n",
553 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
554 else
555 return sprintf(buf, "0\n");
556 }
557
558 static ssize_t show_max_duty_at_crit(struct device *dev,
559 struct device_attribute *devattr,
560 char *buf)
561 {
562 struct adt7473_data *data = adt7473_update_device(dev);
563 return sprintf(buf, "%d\n", data->max_duty_at_overheat);
564 }
565
566 static ssize_t set_max_duty_at_crit(struct device *dev,
567 struct device_attribute *devattr,
568 const char *buf,
569 size_t count)
570 {
571 u8 reg;
572 struct i2c_client *client = to_i2c_client(dev);
573 struct adt7473_data *data = i2c_get_clientdata(client);
574 int temp = simple_strtol(buf, NULL, 10);
575 temp = temp && 0xFF;
576
577 mutex_lock(&data->lock);
578 data->max_duty_at_overheat = temp;
579 reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
580 if (temp)
581 reg |= ADT7473_CFG4_MAX_DUTY_AT_OVT;
582 else
583 reg &= ~ADT7473_CFG4_MAX_DUTY_AT_OVT;
584 i2c_smbus_write_byte_data(client, ADT7473_REG_CFG4, reg);
585 mutex_unlock(&data->lock);
586
587 return count;
588 }
589
590 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
591 char *buf)
592 {
593 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
594 struct adt7473_data *data = adt7473_update_device(dev);
595 return sprintf(buf, "%d\n", data->pwm[attr->index]);
596 }
597
598 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
599 const char *buf, size_t count)
600 {
601 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
602 struct i2c_client *client = to_i2c_client(dev);
603 struct adt7473_data *data = i2c_get_clientdata(client);
604 int temp = simple_strtol(buf, NULL, 10);
605
606 mutex_lock(&data->lock);
607 data->pwm[attr->index] = temp;
608 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM(attr->index), temp);
609 mutex_unlock(&data->lock);
610
611 return count;
612 }
613
614 static ssize_t show_pwm_max(struct device *dev,
615 struct device_attribute *devattr,
616 char *buf)
617 {
618 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
619 struct adt7473_data *data = adt7473_update_device(dev);
620 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
621 }
622
623 static ssize_t set_pwm_max(struct device *dev,
624 struct device_attribute *devattr,
625 const char *buf,
626 size_t count)
627 {
628 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
629 struct i2c_client *client = to_i2c_client(dev);
630 struct adt7473_data *data = i2c_get_clientdata(client);
631 int temp = simple_strtol(buf, NULL, 10);
632
633 mutex_lock(&data->lock);
634 data->pwm_max[attr->index] = temp;
635 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MAX(attr->index),
636 temp);
637 mutex_unlock(&data->lock);
638
639 return count;
640 }
641
642 static ssize_t show_pwm_min(struct device *dev,
643 struct device_attribute *devattr,
644 char *buf)
645 {
646 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
647 struct adt7473_data *data = adt7473_update_device(dev);
648 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
649 }
650
651 static ssize_t set_pwm_min(struct device *dev,
652 struct device_attribute *devattr,
653 const char *buf,
654 size_t count)
655 {
656 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
657 struct i2c_client *client = to_i2c_client(dev);
658 struct adt7473_data *data = i2c_get_clientdata(client);
659 int temp = simple_strtol(buf, NULL, 10);
660
661 mutex_lock(&data->lock);
662 data->pwm_min[attr->index] = temp;
663 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MIN(attr->index),
664 temp);
665 mutex_unlock(&data->lock);
666
667 return count;
668 }
669
670 static ssize_t show_temp_tmax(struct device *dev,
671 struct device_attribute *devattr,
672 char *buf)
673 {
674 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
675 struct adt7473_data *data = adt7473_update_device(dev);
676 return sprintf(buf, "%d\n", 1000 * decode_temp(
677 data->temp_twos_complement,
678 data->temp_tmax[attr->index]));
679 }
680
681 static ssize_t set_temp_tmax(struct device *dev,
682 struct device_attribute *devattr,
683 const char *buf,
684 size_t count)
685 {
686 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
687 struct i2c_client *client = to_i2c_client(dev);
688 struct adt7473_data *data = i2c_get_clientdata(client);
689 int temp = simple_strtol(buf, NULL, 10) / 1000;
690 temp = encode_temp(data->temp_twos_complement, temp);
691
692 mutex_lock(&data->lock);
693 data->temp_tmax[attr->index] = temp;
694 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMAX(attr->index),
695 temp);
696 mutex_unlock(&data->lock);
697
698 return count;
699 }
700
701 static ssize_t show_temp_tmin(struct device *dev,
702 struct device_attribute *devattr,
703 char *buf)
704 {
705 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
706 struct adt7473_data *data = adt7473_update_device(dev);
707 return sprintf(buf, "%d\n", 1000 * decode_temp(
708 data->temp_twos_complement,
709 data->temp_tmin[attr->index]));
710 }
711
712 static ssize_t set_temp_tmin(struct device *dev,
713 struct device_attribute *devattr,
714 const char *buf,
715 size_t count)
716 {
717 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
718 struct i2c_client *client = to_i2c_client(dev);
719 struct adt7473_data *data = i2c_get_clientdata(client);
720 int temp = simple_strtol(buf, NULL, 10) / 1000;
721 temp = encode_temp(data->temp_twos_complement, temp);
722
723 mutex_lock(&data->lock);
724 data->temp_tmin[attr->index] = temp;
725 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMIN(attr->index),
726 temp);
727 mutex_unlock(&data->lock);
728
729 return count;
730 }
731
732 static ssize_t show_pwm_enable(struct device *dev,
733 struct device_attribute *devattr,
734 char *buf)
735 {
736 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
737 struct adt7473_data *data = adt7473_update_device(dev);
738
739 switch (data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT) {
740 case 3:
741 return sprintf(buf, "0\n");
742 case 7:
743 return sprintf(buf, "1\n");
744 default:
745 return sprintf(buf, "2\n");
746 }
747 }
748
749 static ssize_t set_pwm_enable(struct device *dev,
750 struct device_attribute *devattr,
751 const char *buf,
752 size_t count)
753 {
754 u8 reg;
755 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
756 struct i2c_client *client = to_i2c_client(dev);
757 struct adt7473_data *data = i2c_get_clientdata(client);
758 int temp = simple_strtol(buf, NULL, 10);
759
760 switch (temp) {
761 case 0:
762 temp = 3;
763 break;
764 case 1:
765 temp = 7;
766 break;
767 case 2:
768 /* Enter automatic mode with fans off */
769 temp = 4;
770 break;
771 default:
772 return -EINVAL;
773 }
774
775 mutex_lock(&data->lock);
776 reg = i2c_smbus_read_byte_data(client,
777 ADT7473_REG_PWM_BHVR(attr->index));
778 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
779 (reg & ~ADT7473_PWM_BHVR_MASK);
780 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
781 reg);
782 data->pwm_behavior[attr->index] = reg;
783 mutex_unlock(&data->lock);
784
785 return count;
786 }
787
788 static ssize_t show_pwm_auto_temp(struct device *dev,
789 struct device_attribute *devattr,
790 char *buf)
791 {
792 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
793 struct adt7473_data *data = adt7473_update_device(dev);
794 int bhvr = data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT;
795
796 switch (bhvr) {
797 case 3:
798 case 4:
799 case 7:
800 return sprintf(buf, "0\n");
801 case 0:
802 case 1:
803 case 5:
804 case 6:
805 return sprintf(buf, "%d\n", bhvr + 1);
806 case 2:
807 return sprintf(buf, "4\n");
808 }
809 /* shouldn't ever get here */
810 BUG();
811 }
812
813 static ssize_t set_pwm_auto_temp(struct device *dev,
814 struct device_attribute *devattr,
815 const char *buf,
816 size_t count)
817 {
818 u8 reg;
819 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
820 struct i2c_client *client = to_i2c_client(dev);
821 struct adt7473_data *data = i2c_get_clientdata(client);
822 int temp = simple_strtol(buf, NULL, 10);
823
824 switch (temp) {
825 case 1:
826 case 2:
827 case 6:
828 case 7:
829 temp--;
830 break;
831 case 0:
832 temp = 4;
833 break;
834 default:
835 return -EINVAL;
836 }
837
838 mutex_lock(&data->lock);
839 reg = i2c_smbus_read_byte_data(client,
840 ADT7473_REG_PWM_BHVR(attr->index));
841 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
842 (reg & ~ADT7473_PWM_BHVR_MASK);
843 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
844 reg);
845 data->pwm_behavior[attr->index] = reg;
846 mutex_unlock(&data->lock);
847
848 return count;
849 }
850
851 static ssize_t show_alarm(struct device *dev,
852 struct device_attribute *devattr,
853 char *buf)
854 {
855 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
856 struct adt7473_data *data = adt7473_update_device(dev);
857
858 if (data->alarm & attr->index)
859 return sprintf(buf, "1\n");
860 else
861 return sprintf(buf, "0\n");
862 }
863
864
865 static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_volt_max,
866 set_volt_max, 0);
867 static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_volt_max,
868 set_volt_max, 1);
869
870 static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_volt_min,
871 set_volt_min, 0);
872 static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_volt_min,
873 set_volt_min, 1);
874
875 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_volt, NULL, 0);
876 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_volt, NULL, 1);
877
878 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL,
879 ADT7473_VCCP_ALARM);
880 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL,
881 ADT7473_VCC_ALARM);
882
883 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
884 set_temp_max, 0);
885 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
886 set_temp_max, 1);
887 static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
888 set_temp_max, 2);
889
890 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
891 set_temp_min, 0);
892 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
893 set_temp_min, 1);
894 static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
895 set_temp_min, 2);
896
897 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
898 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
899 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
900
901 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
902 ADT7473_R1T_ALARM | ALARM2(ADT7473_R1T_SHORT));
903 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
904 ADT7473_LT_ALARM);
905 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
906 ADT7473_R2T_ALARM | ALARM2(ADT7473_R2T_SHORT));
907
908 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
909 set_fan_min, 0);
910 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
911 set_fan_min, 1);
912 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
913 set_fan_min, 2);
914 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
915 set_fan_min, 3);
916
917 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
918 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
919 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
920 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
921
922 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
923 ALARM2(ADT7473_FAN1_ALARM));
924 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
925 ALARM2(ADT7473_FAN2_ALARM));
926 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
927 ALARM2(ADT7473_FAN3_ALARM));
928 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
929 ALARM2(ADT7473_FAN4_ALARM));
930
931 static SENSOR_DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO,
932 show_max_duty_at_crit, set_max_duty_at_crit, 0);
933
934 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
935 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
936 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
937
938 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
939 show_pwm_min, set_pwm_min, 0);
940 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
941 show_pwm_min, set_pwm_min, 1);
942 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
943 show_pwm_min, set_pwm_min, 2);
944
945 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
946 show_pwm_max, set_pwm_max, 0);
947 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
948 show_pwm_max, set_pwm_max, 1);
949 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
950 show_pwm_max, set_pwm_max, 2);
951
952 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, S_IWUSR | S_IRUGO,
953 show_temp_tmin, set_temp_tmin, 0);
954 static SENSOR_DEVICE_ATTR(temp2_auto_point1_temp, S_IWUSR | S_IRUGO,
955 show_temp_tmin, set_temp_tmin, 1);
956 static SENSOR_DEVICE_ATTR(temp3_auto_point1_temp, S_IWUSR | S_IRUGO,
957 show_temp_tmin, set_temp_tmin, 2);
958
959 static SENSOR_DEVICE_ATTR(temp1_auto_point2_temp, S_IWUSR | S_IRUGO,
960 show_temp_tmax, set_temp_tmax, 0);
961 static SENSOR_DEVICE_ATTR(temp2_auto_point2_temp, S_IWUSR | S_IRUGO,
962 show_temp_tmax, set_temp_tmax, 1);
963 static SENSOR_DEVICE_ATTR(temp3_auto_point2_temp, S_IWUSR | S_IRUGO,
964 show_temp_tmax, set_temp_tmax, 2);
965
966 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
967 set_pwm_enable, 0);
968 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
969 set_pwm_enable, 1);
970 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
971 set_pwm_enable, 2);
972
973 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
974 show_pwm_auto_temp, set_pwm_auto_temp, 0);
975 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
976 show_pwm_auto_temp, set_pwm_auto_temp, 1);
977 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
978 show_pwm_auto_temp, set_pwm_auto_temp, 2);
979
980 static struct attribute *adt7473_attr[] =
981 {
982 &sensor_dev_attr_in1_max.dev_attr.attr,
983 &sensor_dev_attr_in2_max.dev_attr.attr,
984 &sensor_dev_attr_in1_min.dev_attr.attr,
985 &sensor_dev_attr_in2_min.dev_attr.attr,
986 &sensor_dev_attr_in1_input.dev_attr.attr,
987 &sensor_dev_attr_in2_input.dev_attr.attr,
988 &sensor_dev_attr_in1_alarm.dev_attr.attr,
989 &sensor_dev_attr_in2_alarm.dev_attr.attr,
990
991 &sensor_dev_attr_temp1_max.dev_attr.attr,
992 &sensor_dev_attr_temp2_max.dev_attr.attr,
993 &sensor_dev_attr_temp3_max.dev_attr.attr,
994 &sensor_dev_attr_temp1_min.dev_attr.attr,
995 &sensor_dev_attr_temp2_min.dev_attr.attr,
996 &sensor_dev_attr_temp3_min.dev_attr.attr,
997 &sensor_dev_attr_temp1_input.dev_attr.attr,
998 &sensor_dev_attr_temp2_input.dev_attr.attr,
999 &sensor_dev_attr_temp3_input.dev_attr.attr,
1000 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1001 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1002 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1003 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
1004 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
1005 &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
1006 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
1007 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
1008 &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
1009
1010 &sensor_dev_attr_fan1_min.dev_attr.attr,
1011 &sensor_dev_attr_fan2_min.dev_attr.attr,
1012 &sensor_dev_attr_fan3_min.dev_attr.attr,
1013 &sensor_dev_attr_fan4_min.dev_attr.attr,
1014 &sensor_dev_attr_fan1_input.dev_attr.attr,
1015 &sensor_dev_attr_fan2_input.dev_attr.attr,
1016 &sensor_dev_attr_fan3_input.dev_attr.attr,
1017 &sensor_dev_attr_fan4_input.dev_attr.attr,
1018 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1019 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1020 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1021 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1022
1023 &sensor_dev_attr_pwm_use_point2_pwm_at_crit.dev_attr.attr,
1024
1025 &sensor_dev_attr_pwm1.dev_attr.attr,
1026 &sensor_dev_attr_pwm2.dev_attr.attr,
1027 &sensor_dev_attr_pwm3.dev_attr.attr,
1028 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1029 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1030 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1031 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1032 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1033 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1034
1035 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1036 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1037 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1038 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1039 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1040 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1041
1042 NULL
1043 };
1044
1045 static int adt7473_attach_adapter(struct i2c_adapter *adapter)
1046 {
1047 if (!(adapter->class & I2C_CLASS_HWMON))
1048 return 0;
1049 return i2c_probe(adapter, &addr_data, adt7473_detect);
1050 }
1051
1052 static int adt7473_detect(struct i2c_adapter *adapter, int address, int kind)
1053 {
1054 struct i2c_client *client;
1055 struct adt7473_data *data;
1056 int err = 0;
1057
1058 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1059 goto exit;
1060
1061 data = kzalloc(sizeof(struct adt7473_data), GFP_KERNEL);
1062 if (!data) {
1063 err = -ENOMEM;
1064 goto exit;
1065 }
1066
1067 client = &data->client;
1068 client->addr = address;
1069 client->adapter = adapter;
1070 client->driver = &adt7473_driver;
1071
1072 i2c_set_clientdata(client, data);
1073
1074 mutex_init(&data->lock);
1075
1076 if (kind <= 0) {
1077 int vendor, device, revision;
1078
1079 vendor = i2c_smbus_read_byte_data(client, ADT7473_REG_VENDOR);
1080 if (vendor != ADT7473_VENDOR) {
1081 err = -ENODEV;
1082 goto exit_free;
1083 }
1084
1085 device = i2c_smbus_read_byte_data(client, ADT7473_REG_DEVICE);
1086 if (device != ADT7473_DEVICE) {
1087 err = -ENODEV;
1088 goto exit_free;
1089 }
1090
1091 revision = i2c_smbus_read_byte_data(client,
1092 ADT7473_REG_REVISION);
1093 if (revision != ADT7473_REV_68 && revision != ADT7473_REV_69) {
1094 err = -ENODEV;
1095 goto exit_free;
1096 }
1097 } else
1098 dev_dbg(&adapter->dev, "detection forced\n");
1099
1100 strlcpy(client->name, "adt7473", I2C_NAME_SIZE);
1101
1102 err = i2c_attach_client(client);
1103 if (err)
1104 goto exit_free;
1105
1106 dev_info(&client->dev, "%s chip found\n", client->name);
1107
1108 /* Initialize the ADT7473 chip */
1109 adt7473_init_client(client);
1110
1111 /* Register sysfs hooks */
1112 data->attrs.attrs = adt7473_attr;
1113 err = sysfs_create_group(&client->dev.kobj, &data->attrs);
1114 if (err)
1115 goto exit_detach;
1116
1117 data->hwmon_dev = hwmon_device_register(&client->dev);
1118 if (IS_ERR(data->hwmon_dev)) {
1119 err = PTR_ERR(data->hwmon_dev);
1120 goto exit_remove;
1121 }
1122
1123 return 0;
1124
1125 exit_remove:
1126 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1127 exit_detach:
1128 i2c_detach_client(client);
1129 exit_free:
1130 kfree(data);
1131 exit:
1132 return err;
1133 }
1134
1135 static int adt7473_detach_client(struct i2c_client *client)
1136 {
1137 struct adt7473_data *data = i2c_get_clientdata(client);
1138
1139 hwmon_device_unregister(data->hwmon_dev);
1140 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1141 i2c_detach_client(client);
1142 kfree(data);
1143 return 0;
1144 }
1145
1146 static int __init adt7473_init(void)
1147 {
1148 return i2c_add_driver(&adt7473_driver);
1149 }
1150
1151 static void __exit adt7473_exit(void)
1152 {
1153 i2c_del_driver(&adt7473_driver);
1154 }
1155
1156 MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
1157 MODULE_DESCRIPTION("ADT7473 driver");
1158 MODULE_LICENSE("GPL");
1159
1160 module_init(adt7473_init);
1161 module_exit(adt7473_exit);
Linux kernel - Deliverables
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