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signals: dequeue_signal: don't check SIGNAL_GROUP_EXIT when setting SIGNAL_STOP_DEQUEUED
[linux-2.6/mini2440.git] / drivers / hwmon / adt7473.c
blobce4a7cb5a116ad59365aa846921926a92bd5fa17
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 device *hwmon_dev;
147 struct attribute_group attrs;
148 struct mutex lock;
149 char sensors_valid;
150 char limits_valid;
151 unsigned long sensors_last_updated; /* In jiffies */
152 unsigned long limits_last_updated; /* In jiffies */
153
154 u8 volt[ADT7473_VOLT_COUNT];
155 s8 volt_min[ADT7473_VOLT_COUNT];
156 s8 volt_max[ADT7473_VOLT_COUNT];
157
158 s8 temp[ADT7473_TEMP_COUNT];
159 s8 temp_min[ADT7473_TEMP_COUNT];
160 s8 temp_max[ADT7473_TEMP_COUNT];
161 s8 temp_tmin[ADT7473_TEMP_COUNT];
162 /* This is called the !THERM limit in the datasheet */
163 s8 temp_tmax[ADT7473_TEMP_COUNT];
164
165 u16 fan[ADT7473_FAN_COUNT];
166 u16 fan_min[ADT7473_FAN_COUNT];
167
168 u8 pwm[ADT7473_PWM_COUNT];
169 u8 pwm_max[ADT7473_PWM_COUNT];
170 u8 pwm_min[ADT7473_PWM_COUNT];
171 u8 pwm_behavior[ADT7473_PWM_COUNT];
172
173 u8 temp_twos_complement;
174 u8 temp_offset;
175
176 u16 alarm;
177 u8 max_duty_at_overheat;
178 };
179
180 static int adt7473_probe(struct i2c_client *client,
181 const struct i2c_device_id *id);
182 static int adt7473_detect(struct i2c_client *client, int kind,
183 struct i2c_board_info *info);
184 static int adt7473_remove(struct i2c_client *client);
185
186 static const struct i2c_device_id adt7473_id[] = {
187 { "adt7473", adt7473 },
188 { }
189 };
190 MODULE_DEVICE_TABLE(i2c, adt7473_id);
191
192 static struct i2c_driver adt7473_driver = {
193 .class = I2C_CLASS_HWMON,
194 .driver = {
195 .name = "adt7473",
196 },
197 .probe = adt7473_probe,
198 .remove = adt7473_remove,
199 .id_table = adt7473_id,
200 .detect = adt7473_detect,
201 .address_data = &addr_data,
202 };
203
204 /*
205 * 16-bit registers on the ADT7473 are low-byte first. The data sheet says
206 * that the low byte must be read before the high byte.
207 */
208 static inline int adt7473_read_word_data(struct i2c_client *client, u8 reg)
209 {
210 u16 foo;
211 foo = i2c_smbus_read_byte_data(client, reg);
212 foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
213 return foo;
214 }
215
216 static inline int adt7473_write_word_data(struct i2c_client *client, u8 reg,
217 u16 value)
218 {
219 return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
220 && i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
221 }
222
223 static void adt7473_init_client(struct i2c_client *client)
224 {
225 int reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG1);
226
227 if (!(reg & ADT7473_CFG1_READY)) {
228 dev_err(&client->dev, "Chip not ready.\n");
229 } else {
230 /* start monitoring */
231 i2c_smbus_write_byte_data(client, ADT7473_REG_CFG1,
232 reg | ADT7473_CFG1_START);
233 }
234 }
235
236 static struct adt7473_data *adt7473_update_device(struct device *dev)
237 {
238 struct i2c_client *client = to_i2c_client(dev);
239 struct adt7473_data *data = i2c_get_clientdata(client);
240 unsigned long local_jiffies = jiffies;
241 u8 cfg;
242 int i;
243
244 mutex_lock(&data->lock);
245 if (time_before(local_jiffies, data->sensors_last_updated +
246 SENSOR_REFRESH_INTERVAL)
247 && data->sensors_valid)
248 goto no_sensor_update;
249
250 for (i = 0; i < ADT7473_VOLT_COUNT; i++)
251 data->volt[i] = i2c_smbus_read_byte_data(client,
252 ADT7473_REG_VOLT(i));
253
254 /* Determine temperature encoding */
255 cfg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG5);
256 data->temp_twos_complement = (cfg & ADT7473_CFG5_TEMP_TWOS);
257
258 /*
259 * What does this do? it implies a variable temperature sensor
260 * offset, but the datasheet doesn't say anything about this bit
261 * and other parts of the datasheet imply that "offset64" mode
262 * means that you shift temp values by -64 if the above bit was set.
263 */
264 data->temp_offset = (cfg & ADT7473_CFG5_TEMP_OFFSET);
265
266 for (i = 0; i < ADT7473_TEMP_COUNT; i++)
267 data->temp[i] = i2c_smbus_read_byte_data(client,
268 ADT7473_REG_TEMP(i));
269
270 for (i = 0; i < ADT7473_FAN_COUNT; i++)
271 data->fan[i] = adt7473_read_word_data(client,
272 ADT7473_REG_FAN(i));
273
274 for (i = 0; i < ADT7473_PWM_COUNT; i++)
275 data->pwm[i] = i2c_smbus_read_byte_data(client,
276 ADT7473_REG_PWM(i));
277
278 data->alarm = i2c_smbus_read_byte_data(client, ADT7473_REG_ALARM1);
279 if (data->alarm & ADT7473_OOL)
280 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
281 ADT7473_REG_ALARM2));
282
283 data->sensors_last_updated = local_jiffies;
284 data->sensors_valid = 1;
285
286 no_sensor_update:
287 if (time_before(local_jiffies, data->limits_last_updated +
288 LIMIT_REFRESH_INTERVAL)
289 && data->limits_valid)
290 goto out;
291
292 for (i = 0; i < ADT7473_VOLT_COUNT; i++) {
293 data->volt_min[i] = i2c_smbus_read_byte_data(client,
294 ADT7473_REG_VOLT_MIN(i));
295 data->volt_max[i] = i2c_smbus_read_byte_data(client,
296 ADT7473_REG_VOLT_MAX(i));
297 }
298
299 for (i = 0; i < ADT7473_TEMP_COUNT; i++) {
300 data->temp_min[i] = i2c_smbus_read_byte_data(client,
301 ADT7473_REG_TEMP_MIN(i));
302 data->temp_max[i] = i2c_smbus_read_byte_data(client,
303 ADT7473_REG_TEMP_MAX(i));
304 data->temp_tmin[i] = i2c_smbus_read_byte_data(client,
305 ADT7473_REG_TEMP_TMIN(i));
306 data->temp_tmax[i] = i2c_smbus_read_byte_data(client,
307 ADT7473_REG_TEMP_TMAX(i));
308 }
309
310 for (i = 0; i < ADT7473_FAN_COUNT; i++)
311 data->fan_min[i] = adt7473_read_word_data(client,
312 ADT7473_REG_FAN_MIN(i));
313
314 for (i = 0; i < ADT7473_PWM_COUNT; i++) {
315 data->pwm_max[i] = i2c_smbus_read_byte_data(client,
316 ADT7473_REG_PWM_MAX(i));
317 data->pwm_min[i] = i2c_smbus_read_byte_data(client,
318 ADT7473_REG_PWM_MIN(i));
319 data->pwm_behavior[i] = i2c_smbus_read_byte_data(client,
320 ADT7473_REG_PWM_BHVR(i));
321 }
322
323 i = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
324 data->max_duty_at_overheat = !!(i & ADT7473_CFG4_MAX_DUTY_AT_OVT);
325
326 data->limits_last_updated = local_jiffies;
327 data->limits_valid = 1;
328
329 out:
330 mutex_unlock(&data->lock);
331 return data;
332 }
333
334 /*
335 * On this chip, voltages are given as a count of steps between a minimum
336 * and maximum voltage, not a direct voltage.
337 */
338 static const int volt_convert_table[][2] = {
339 {2997, 3},
340 {4395, 4},
341 };
342
343 static int decode_volt(int volt_index, u8 raw)
344 {
345 int cmax = volt_convert_table[volt_index][0];
346 int cmin = volt_convert_table[volt_index][1];
347 return ((raw * (cmax - cmin)) / 255) + cmin;
348 }
349
350 static u8 encode_volt(int volt_index, int cooked)
351 {
352 int cmax = volt_convert_table[volt_index][0];
353 int cmin = volt_convert_table[volt_index][1];
354 u8 x;
355
356 if (cooked > cmax)
357 cooked = cmax;
358 else if (cooked < cmin)
359 cooked = cmin;
360
361 x = ((cooked - cmin) * 255) / (cmax - cmin);
362
363 return x;
364 }
365
366 static ssize_t show_volt_min(struct device *dev,
367 struct device_attribute *devattr,
368 char *buf)
369 {
370 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
371 struct adt7473_data *data = adt7473_update_device(dev);
372 return sprintf(buf, "%d\n",
373 decode_volt(attr->index, data->volt_min[attr->index]));
374 }
375
376 static ssize_t set_volt_min(struct device *dev,
377 struct device_attribute *devattr,
378 const char *buf,
379 size_t count)
380 {
381 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
382 struct i2c_client *client = to_i2c_client(dev);
383 struct adt7473_data *data = i2c_get_clientdata(client);
384 int volt = encode_volt(attr->index, simple_strtol(buf, NULL, 10));
385
386 mutex_lock(&data->lock);
387 data->volt_min[attr->index] = volt;
388 i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MIN(attr->index),
389 volt);
390 mutex_unlock(&data->lock);
391
392 return count;
393 }
394
395 static ssize_t show_volt_max(struct device *dev,
396 struct device_attribute *devattr,
397 char *buf)
398 {
399 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
400 struct adt7473_data *data = adt7473_update_device(dev);
401 return sprintf(buf, "%d\n",
402 decode_volt(attr->index, data->volt_max[attr->index]));
403 }
404
405 static ssize_t set_volt_max(struct device *dev,
406 struct device_attribute *devattr,
407 const char *buf,
408 size_t count)
409 {
410 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
411 struct i2c_client *client = to_i2c_client(dev);
412 struct adt7473_data *data = i2c_get_clientdata(client);
413 int volt = encode_volt(attr->index, simple_strtol(buf, NULL, 10));
414
415 mutex_lock(&data->lock);
416 data->volt_max[attr->index] = volt;
417 i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MAX(attr->index),
418 volt);
419 mutex_unlock(&data->lock);
420
421 return count;
422 }
423
424 static ssize_t show_volt(struct device *dev, struct device_attribute *devattr,
425 char *buf)
426 {
427 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
428 struct adt7473_data *data = adt7473_update_device(dev);
429
430 return sprintf(buf, "%d\n",
431 decode_volt(attr->index, data->volt[attr->index]));
432 }
433
434 /*
435 * This chip can report temperature data either as a two's complement
436 * number in the range -128 to 127, or as an unsigned number that must
437 * be offset by 64.
438 */
439 static int decode_temp(u8 twos_complement, u8 raw)
440 {
441 return twos_complement ? (s8)raw : raw - 64;
442 }
443
444 static u8 encode_temp(u8 twos_complement, int cooked)
445 {
446 return twos_complement ? cooked & 0xFF : cooked + 64;
447 }
448
449 static ssize_t show_temp_min(struct device *dev,
450 struct device_attribute *devattr,
451 char *buf)
452 {
453 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
454 struct adt7473_data *data = adt7473_update_device(dev);
455 return sprintf(buf, "%d\n", 1000 * decode_temp(
456 data->temp_twos_complement,
457 data->temp_min[attr->index]));
458 }
459
460 static ssize_t set_temp_min(struct device *dev,
461 struct device_attribute *devattr,
462 const char *buf,
463 size_t count)
464 {
465 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
466 struct i2c_client *client = to_i2c_client(dev);
467 struct adt7473_data *data = i2c_get_clientdata(client);
468 int temp = simple_strtol(buf, NULL, 10) / 1000;
469 temp = encode_temp(data->temp_twos_complement, temp);
470
471 mutex_lock(&data->lock);
472 data->temp_min[attr->index] = temp;
473 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MIN(attr->index),
474 temp);
475 mutex_unlock(&data->lock);
476
477 return count;
478 }
479
480 static ssize_t show_temp_max(struct device *dev,
481 struct device_attribute *devattr,
482 char *buf)
483 {
484 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
485 struct adt7473_data *data = adt7473_update_device(dev);
486 return sprintf(buf, "%d\n", 1000 * decode_temp(
487 data->temp_twos_complement,
488 data->temp_max[attr->index]));
489 }
490
491 static ssize_t set_temp_max(struct device *dev,
492 struct device_attribute *devattr,
493 const char *buf,
494 size_t count)
495 {
496 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
497 struct i2c_client *client = to_i2c_client(dev);
498 struct adt7473_data *data = i2c_get_clientdata(client);
499 int temp = simple_strtol(buf, NULL, 10) / 1000;
500 temp = encode_temp(data->temp_twos_complement, temp);
501
502 mutex_lock(&data->lock);
503 data->temp_max[attr->index] = temp;
504 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MAX(attr->index),
505 temp);
506 mutex_unlock(&data->lock);
507
508 return count;
509 }
510
511 static ssize_t show_temp(struct device *dev, 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 return sprintf(buf, "%d\n", 1000 * decode_temp(
517 data->temp_twos_complement,
518 data->temp[attr->index]));
519 }
520
521 static ssize_t show_fan_min(struct device *dev,
522 struct device_attribute *devattr,
523 char *buf)
524 {
525 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
526 struct adt7473_data *data = adt7473_update_device(dev);
527
528 if (FAN_DATA_VALID(data->fan_min[attr->index]))
529 return sprintf(buf, "%d\n",
530 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
531 else
532 return sprintf(buf, "0\n");
533 }
534
535 static ssize_t set_fan_min(struct device *dev,
536 struct device_attribute *devattr,
537 const char *buf, size_t count)
538 {
539 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
540 struct i2c_client *client = to_i2c_client(dev);
541 struct adt7473_data *data = i2c_get_clientdata(client);
542 int temp = simple_strtol(buf, NULL, 10);
543
544 if (!temp)
545 return -EINVAL;
546 temp = FAN_RPM_TO_PERIOD(temp);
547
548 mutex_lock(&data->lock);
549 data->fan_min[attr->index] = temp;
550 adt7473_write_word_data(client, ADT7473_REG_FAN_MIN(attr->index), temp);
551 mutex_unlock(&data->lock);
552
553 return count;
554 }
555
556 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
557 char *buf)
558 {
559 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
560 struct adt7473_data *data = adt7473_update_device(dev);
561
562 if (FAN_DATA_VALID(data->fan[attr->index]))
563 return sprintf(buf, "%d\n",
564 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
565 else
566 return sprintf(buf, "0\n");
567 }
568
569 static ssize_t show_max_duty_at_crit(struct device *dev,
570 struct device_attribute *devattr,
571 char *buf)
572 {
573 struct adt7473_data *data = adt7473_update_device(dev);
574 return sprintf(buf, "%d\n", data->max_duty_at_overheat);
575 }
576
577 static ssize_t set_max_duty_at_crit(struct device *dev,
578 struct device_attribute *devattr,
579 const char *buf,
580 size_t count)
581 {
582 u8 reg;
583 struct i2c_client *client = to_i2c_client(dev);
584 struct adt7473_data *data = i2c_get_clientdata(client);
585 int temp = simple_strtol(buf, NULL, 10);
586 temp = temp && 0xFF;
587
588 mutex_lock(&data->lock);
589 data->max_duty_at_overheat = temp;
590 reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
591 if (temp)
592 reg |= ADT7473_CFG4_MAX_DUTY_AT_OVT;
593 else
594 reg &= ~ADT7473_CFG4_MAX_DUTY_AT_OVT;
595 i2c_smbus_write_byte_data(client, ADT7473_REG_CFG4, reg);
596 mutex_unlock(&data->lock);
597
598 return count;
599 }
600
601 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
602 char *buf)
603 {
604 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
605 struct adt7473_data *data = adt7473_update_device(dev);
606 return sprintf(buf, "%d\n", data->pwm[attr->index]);
607 }
608
609 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
610 const char *buf, size_t count)
611 {
612 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
613 struct i2c_client *client = to_i2c_client(dev);
614 struct adt7473_data *data = i2c_get_clientdata(client);
615 int temp = simple_strtol(buf, NULL, 10);
616
617 mutex_lock(&data->lock);
618 data->pwm[attr->index] = temp;
619 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM(attr->index), temp);
620 mutex_unlock(&data->lock);
621
622 return count;
623 }
624
625 static ssize_t show_pwm_max(struct device *dev,
626 struct device_attribute *devattr,
627 char *buf)
628 {
629 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
630 struct adt7473_data *data = adt7473_update_device(dev);
631 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
632 }
633
634 static ssize_t set_pwm_max(struct device *dev,
635 struct device_attribute *devattr,
636 const char *buf,
637 size_t count)
638 {
639 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
640 struct i2c_client *client = to_i2c_client(dev);
641 struct adt7473_data *data = i2c_get_clientdata(client);
642 int temp = simple_strtol(buf, NULL, 10);
643
644 mutex_lock(&data->lock);
645 data->pwm_max[attr->index] = temp;
646 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MAX(attr->index),
647 temp);
648 mutex_unlock(&data->lock);
649
650 return count;
651 }
652
653 static ssize_t show_pwm_min(struct device *dev,
654 struct device_attribute *devattr,
655 char *buf)
656 {
657 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
658 struct adt7473_data *data = adt7473_update_device(dev);
659 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
660 }
661
662 static ssize_t set_pwm_min(struct device *dev,
663 struct device_attribute *devattr,
664 const char *buf,
665 size_t count)
666 {
667 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
668 struct i2c_client *client = to_i2c_client(dev);
669 struct adt7473_data *data = i2c_get_clientdata(client);
670 int temp = simple_strtol(buf, NULL, 10);
671
672 mutex_lock(&data->lock);
673 data->pwm_min[attr->index] = temp;
674 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MIN(attr->index),
675 temp);
676 mutex_unlock(&data->lock);
677
678 return count;
679 }
680
681 static ssize_t show_temp_tmax(struct device *dev,
682 struct device_attribute *devattr,
683 char *buf)
684 {
685 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
686 struct adt7473_data *data = adt7473_update_device(dev);
687 return sprintf(buf, "%d\n", 1000 * decode_temp(
688 data->temp_twos_complement,
689 data->temp_tmax[attr->index]));
690 }
691
692 static ssize_t set_temp_tmax(struct device *dev,
693 struct device_attribute *devattr,
694 const char *buf,
695 size_t count)
696 {
697 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
698 struct i2c_client *client = to_i2c_client(dev);
699 struct adt7473_data *data = i2c_get_clientdata(client);
700 int temp = simple_strtol(buf, NULL, 10) / 1000;
701 temp = encode_temp(data->temp_twos_complement, temp);
702
703 mutex_lock(&data->lock);
704 data->temp_tmax[attr->index] = temp;
705 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMAX(attr->index),
706 temp);
707 mutex_unlock(&data->lock);
708
709 return count;
710 }
711
712 static ssize_t show_temp_tmin(struct device *dev,
713 struct device_attribute *devattr,
714 char *buf)
715 {
716 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
717 struct adt7473_data *data = adt7473_update_device(dev);
718 return sprintf(buf, "%d\n", 1000 * decode_temp(
719 data->temp_twos_complement,
720 data->temp_tmin[attr->index]));
721 }
722
723 static ssize_t set_temp_tmin(struct device *dev,
724 struct device_attribute *devattr,
725 const char *buf,
726 size_t count)
727 {
728 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
729 struct i2c_client *client = to_i2c_client(dev);
730 struct adt7473_data *data = i2c_get_clientdata(client);
731 int temp = simple_strtol(buf, NULL, 10) / 1000;
732 temp = encode_temp(data->temp_twos_complement, temp);
733
734 mutex_lock(&data->lock);
735 data->temp_tmin[attr->index] = temp;
736 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMIN(attr->index),
737 temp);
738 mutex_unlock(&data->lock);
739
740 return count;
741 }
742
743 static ssize_t show_pwm_enable(struct device *dev,
744 struct device_attribute *devattr,
745 char *buf)
746 {
747 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
748 struct adt7473_data *data = adt7473_update_device(dev);
749
750 switch (data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT) {
751 case 3:
752 return sprintf(buf, "0\n");
753 case 7:
754 return sprintf(buf, "1\n");
755 default:
756 return sprintf(buf, "2\n");
757 }
758 }
759
760 static ssize_t set_pwm_enable(struct device *dev,
761 struct device_attribute *devattr,
762 const char *buf,
763 size_t count)
764 {
765 u8 reg;
766 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
767 struct i2c_client *client = to_i2c_client(dev);
768 struct adt7473_data *data = i2c_get_clientdata(client);
769 int temp = simple_strtol(buf, NULL, 10);
770
771 switch (temp) {
772 case 0:
773 temp = 3;
774 break;
775 case 1:
776 temp = 7;
777 break;
778 case 2:
779 /* Enter automatic mode with fans off */
780 temp = 4;
781 break;
782 default:
783 return -EINVAL;
784 }
785
786 mutex_lock(&data->lock);
787 reg = i2c_smbus_read_byte_data(client,
788 ADT7473_REG_PWM_BHVR(attr->index));
789 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
790 (reg & ~ADT7473_PWM_BHVR_MASK);
791 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
792 reg);
793 data->pwm_behavior[attr->index] = reg;
794 mutex_unlock(&data->lock);
795
796 return count;
797 }
798
799 static ssize_t show_pwm_auto_temp(struct device *dev,
800 struct device_attribute *devattr,
801 char *buf)
802 {
803 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
804 struct adt7473_data *data = adt7473_update_device(dev);
805 int bhvr = data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT;
806
807 switch (bhvr) {
808 case 3:
809 case 4:
810 case 7:
811 return sprintf(buf, "0\n");
812 case 0:
813 case 1:
814 case 5:
815 case 6:
816 return sprintf(buf, "%d\n", bhvr + 1);
817 case 2:
818 return sprintf(buf, "4\n");
819 }
820 /* shouldn't ever get here */
821 BUG();
822 }
823
824 static ssize_t set_pwm_auto_temp(struct device *dev,
825 struct device_attribute *devattr,
826 const char *buf,
827 size_t count)
828 {
829 u8 reg;
830 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
831 struct i2c_client *client = to_i2c_client(dev);
832 struct adt7473_data *data = i2c_get_clientdata(client);
833 int temp = simple_strtol(buf, NULL, 10);
834
835 switch (temp) {
836 case 1:
837 case 2:
838 case 6:
839 case 7:
840 temp--;
841 break;
842 case 0:
843 temp = 4;
844 break;
845 default:
846 return -EINVAL;
847 }
848
849 mutex_lock(&data->lock);
850 reg = i2c_smbus_read_byte_data(client,
851 ADT7473_REG_PWM_BHVR(attr->index));
852 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
853 (reg & ~ADT7473_PWM_BHVR_MASK);
854 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
855 reg);
856 data->pwm_behavior[attr->index] = reg;
857 mutex_unlock(&data->lock);
858
859 return count;
860 }
861
862 static ssize_t show_alarm(struct device *dev,
863 struct device_attribute *devattr,
864 char *buf)
865 {
866 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
867 struct adt7473_data *data = adt7473_update_device(dev);
868
869 if (data->alarm & attr->index)
870 return sprintf(buf, "1\n");
871 else
872 return sprintf(buf, "0\n");
873 }
874
875
876 static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_volt_max,
877 set_volt_max, 0);
878 static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_volt_max,
879 set_volt_max, 1);
880
881 static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_volt_min,
882 set_volt_min, 0);
883 static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_volt_min,
884 set_volt_min, 1);
885
886 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_volt, NULL, 0);
887 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_volt, NULL, 1);
888
889 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL,
890 ADT7473_VCCP_ALARM);
891 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL,
892 ADT7473_VCC_ALARM);
893
894 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
895 set_temp_max, 0);
896 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
897 set_temp_max, 1);
898 static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
899 set_temp_max, 2);
900
901 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
902 set_temp_min, 0);
903 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
904 set_temp_min, 1);
905 static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
906 set_temp_min, 2);
907
908 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
909 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
910 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
911
912 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
913 ADT7473_R1T_ALARM | ALARM2(ADT7473_R1T_SHORT));
914 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
915 ADT7473_LT_ALARM);
916 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
917 ADT7473_R2T_ALARM | ALARM2(ADT7473_R2T_SHORT));
918
919 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
920 set_fan_min, 0);
921 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
922 set_fan_min, 1);
923 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
924 set_fan_min, 2);
925 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
926 set_fan_min, 3);
927
928 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
929 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
930 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
931 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
932
933 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
934 ALARM2(ADT7473_FAN1_ALARM));
935 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
936 ALARM2(ADT7473_FAN2_ALARM));
937 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
938 ALARM2(ADT7473_FAN3_ALARM));
939 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
940 ALARM2(ADT7473_FAN4_ALARM));
941
942 static SENSOR_DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO,
943 show_max_duty_at_crit, set_max_duty_at_crit, 0);
944
945 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
946 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
947 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
948
949 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
950 show_pwm_min, set_pwm_min, 0);
951 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
952 show_pwm_min, set_pwm_min, 1);
953 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
954 show_pwm_min, set_pwm_min, 2);
955
956 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
957 show_pwm_max, set_pwm_max, 0);
958 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
959 show_pwm_max, set_pwm_max, 1);
960 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
961 show_pwm_max, set_pwm_max, 2);
962
963 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, S_IWUSR | S_IRUGO,
964 show_temp_tmin, set_temp_tmin, 0);
965 static SENSOR_DEVICE_ATTR(temp2_auto_point1_temp, S_IWUSR | S_IRUGO,
966 show_temp_tmin, set_temp_tmin, 1);
967 static SENSOR_DEVICE_ATTR(temp3_auto_point1_temp, S_IWUSR | S_IRUGO,
968 show_temp_tmin, set_temp_tmin, 2);
969
970 static SENSOR_DEVICE_ATTR(temp1_auto_point2_temp, S_IWUSR | S_IRUGO,
971 show_temp_tmax, set_temp_tmax, 0);
972 static SENSOR_DEVICE_ATTR(temp2_auto_point2_temp, S_IWUSR | S_IRUGO,
973 show_temp_tmax, set_temp_tmax, 1);
974 static SENSOR_DEVICE_ATTR(temp3_auto_point2_temp, S_IWUSR | S_IRUGO,
975 show_temp_tmax, set_temp_tmax, 2);
976
977 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
978 set_pwm_enable, 0);
979 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
980 set_pwm_enable, 1);
981 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
982 set_pwm_enable, 2);
983
984 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
985 show_pwm_auto_temp, set_pwm_auto_temp, 0);
986 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
987 show_pwm_auto_temp, set_pwm_auto_temp, 1);
988 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
989 show_pwm_auto_temp, set_pwm_auto_temp, 2);
990
991 static struct attribute *adt7473_attr[] =
992 {
993 &sensor_dev_attr_in1_max.dev_attr.attr,
994 &sensor_dev_attr_in2_max.dev_attr.attr,
995 &sensor_dev_attr_in1_min.dev_attr.attr,
996 &sensor_dev_attr_in2_min.dev_attr.attr,
997 &sensor_dev_attr_in1_input.dev_attr.attr,
998 &sensor_dev_attr_in2_input.dev_attr.attr,
999 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1000 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1001
1002 &sensor_dev_attr_temp1_max.dev_attr.attr,
1003 &sensor_dev_attr_temp2_max.dev_attr.attr,
1004 &sensor_dev_attr_temp3_max.dev_attr.attr,
1005 &sensor_dev_attr_temp1_min.dev_attr.attr,
1006 &sensor_dev_attr_temp2_min.dev_attr.attr,
1007 &sensor_dev_attr_temp3_min.dev_attr.attr,
1008 &sensor_dev_attr_temp1_input.dev_attr.attr,
1009 &sensor_dev_attr_temp2_input.dev_attr.attr,
1010 &sensor_dev_attr_temp3_input.dev_attr.attr,
1011 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1012 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1013 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1014 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
1015 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
1016 &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
1017 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
1018 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
1019 &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
1020
1021 &sensor_dev_attr_fan1_min.dev_attr.attr,
1022 &sensor_dev_attr_fan2_min.dev_attr.attr,
1023 &sensor_dev_attr_fan3_min.dev_attr.attr,
1024 &sensor_dev_attr_fan4_min.dev_attr.attr,
1025 &sensor_dev_attr_fan1_input.dev_attr.attr,
1026 &sensor_dev_attr_fan2_input.dev_attr.attr,
1027 &sensor_dev_attr_fan3_input.dev_attr.attr,
1028 &sensor_dev_attr_fan4_input.dev_attr.attr,
1029 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1030 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1031 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1032 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1033
1034 &sensor_dev_attr_pwm_use_point2_pwm_at_crit.dev_attr.attr,
1035
1036 &sensor_dev_attr_pwm1.dev_attr.attr,
1037 &sensor_dev_attr_pwm2.dev_attr.attr,
1038 &sensor_dev_attr_pwm3.dev_attr.attr,
1039 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1040 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1041 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1042 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1043 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1044 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1045
1046 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1047 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1048 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1049 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1050 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1051 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1052
1053 NULL
1054 };
1055
1056 /* Return 0 if detection is successful, -ENODEV otherwise */
1057 static int adt7473_detect(struct i2c_client *client, int kind,
1058 struct i2c_board_info *info)
1059 {
1060 struct i2c_adapter *adapter = client->adapter;
1061
1062 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1063 return -ENODEV;
1064
1065 if (kind <= 0) {
1066 int vendor, device, revision;
1067
1068 vendor = i2c_smbus_read_byte_data(client, ADT7473_REG_VENDOR);
1069 if (vendor != ADT7473_VENDOR)
1070 return -ENODEV;
1071
1072 device = i2c_smbus_read_byte_data(client, ADT7473_REG_DEVICE);
1073 if (device != ADT7473_DEVICE)
1074 return -ENODEV;
1075
1076 revision = i2c_smbus_read_byte_data(client,
1077 ADT7473_REG_REVISION);
1078 if (revision != ADT7473_REV_68 && revision != ADT7473_REV_69)
1079 return -ENODEV;
1080 } else
1081 dev_dbg(&adapter->dev, "detection forced\n");
1082
1083 strlcpy(info->type, "adt7473", I2C_NAME_SIZE);
1084
1085 return 0;
1086 }
1087
1088 static int adt7473_probe(struct i2c_client *client,
1089 const struct i2c_device_id *id)
1090 {
1091 struct adt7473_data *data;
1092 int err;
1093
1094 data = kzalloc(sizeof(struct adt7473_data), GFP_KERNEL);
1095 if (!data) {
1096 err = -ENOMEM;
1097 goto exit;
1098 }
1099
1100 i2c_set_clientdata(client, data);
1101 mutex_init(&data->lock);
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_free;
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_free:
1125 kfree(data);
1126 exit:
1127 return err;
1128 }
1129
1130 static int adt7473_remove(struct i2c_client *client)
1131 {
1132 struct adt7473_data *data = i2c_get_clientdata(client);
1133
1134 hwmon_device_unregister(data->hwmon_dev);
1135 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1136 kfree(data);
1137 return 0;
1138 }
1139
1140 static int __init adt7473_init(void)
1141 {
1142 return i2c_add_driver(&adt7473_driver);
1143 }
1144
1145 static void __exit adt7473_exit(void)
1146 {
1147 i2c_del_driver(&adt7473_driver);
1148 }
1149
1150 MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
1151 MODULE_DESCRIPTION("ADT7473 driver");
1152 MODULE_LICENSE("GPL");
1153
1154 module_init(adt7473_init);
1155 module_exit(adt7473_exit);
Support for the Chinese Samsung S3C2440 based development boards