xref: /openbmc/linux/drivers/hwmon/adt7475.c (revision b6dcefde)
1 /*
2  * adt7475 - Thermal sensor driver for the ADT7475 chip and derivatives
3  * Copyright (C) 2007-2008, Advanced Micro Devices, Inc.
4  * Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
5  * Copyright (C) 2008 Hans de Goede <hdegoede@redhat.com>
6  * Copyright (C) 2009 Jean Delvare <khali@linux-fr.org>
7  *
8  * Derived from the lm83 driver by Jean Delvare
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software Foundation.
13  */
14 
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/slab.h>
18 #include <linux/i2c.h>
19 #include <linux/hwmon.h>
20 #include <linux/hwmon-sysfs.h>
21 #include <linux/hwmon-vid.h>
22 #include <linux/err.h>
23 
24 /* Indexes for the sysfs hooks */
25 
26 #define INPUT		0
27 #define MIN		1
28 #define MAX		2
29 #define CONTROL		3
30 #define OFFSET		3
31 #define AUTOMIN		4
32 #define THERM		5
33 #define HYSTERSIS	6
34 
35 /* These are unique identifiers for the sysfs functions - unlike the
36    numbers above, these are not also indexes into an array
37 */
38 
39 #define ALARM		9
40 #define FAULT		10
41 
42 /* 7475 Common Registers */
43 
44 #define REG_DEVREV2		0x12	/* ADT7490 only */
45 
46 #define REG_VTT			0x1E	/* ADT7490 only */
47 #define REG_EXTEND3		0x1F	/* ADT7490 only */
48 
49 #define REG_VOLTAGE_BASE	0x20
50 #define REG_TEMP_BASE		0x25
51 #define REG_TACH_BASE		0x28
52 #define REG_PWM_BASE		0x30
53 #define REG_PWM_MAX_BASE	0x38
54 
55 #define REG_DEVID		0x3D
56 #define REG_VENDID		0x3E
57 #define REG_DEVID2		0x3F
58 
59 #define REG_STATUS1		0x41
60 #define REG_STATUS2		0x42
61 
62 #define REG_VID			0x43	/* ADT7476 only */
63 
64 #define REG_VOLTAGE_MIN_BASE	0x44
65 #define REG_VOLTAGE_MAX_BASE	0x45
66 
67 #define REG_TEMP_MIN_BASE	0x4E
68 #define REG_TEMP_MAX_BASE	0x4F
69 
70 #define REG_TACH_MIN_BASE	0x54
71 
72 #define REG_PWM_CONFIG_BASE	0x5C
73 
74 #define REG_TEMP_TRANGE_BASE	0x5F
75 
76 #define REG_PWM_MIN_BASE	0x64
77 
78 #define REG_TEMP_TMIN_BASE	0x67
79 #define REG_TEMP_THERM_BASE	0x6A
80 
81 #define REG_REMOTE1_HYSTERSIS	0x6D
82 #define REG_REMOTE2_HYSTERSIS	0x6E
83 
84 #define REG_TEMP_OFFSET_BASE	0x70
85 
86 #define REG_CONFIG2		0x73
87 
88 #define REG_EXTEND1		0x76
89 #define REG_EXTEND2		0x77
90 
91 #define REG_CONFIG3		0x78
92 #define REG_CONFIG5		0x7C
93 #define REG_CONFIG4		0x7D
94 
95 #define REG_STATUS4		0x81	/* ADT7490 only */
96 
97 #define REG_VTT_MIN		0x84	/* ADT7490 only */
98 #define REG_VTT_MAX		0x86	/* ADT7490 only */
99 
100 #define VID_VIDSEL		0x80	/* ADT7476 only */
101 
102 #define CONFIG2_ATTN		0x20
103 
104 #define CONFIG3_SMBALERT	0x01
105 #define CONFIG3_THERM		0x02
106 
107 #define CONFIG4_PINFUNC		0x03
108 #define CONFIG4_MAXDUTY		0x08
109 #define CONFIG4_ATTN_IN10	0x30
110 #define CONFIG4_ATTN_IN43	0xC0
111 
112 #define CONFIG5_TWOSCOMP	0x01
113 #define CONFIG5_TEMPOFFSET	0x02
114 #define CONFIG5_VIDGPIO		0x10	/* ADT7476 only */
115 
116 /* ADT7475 Settings */
117 
118 #define ADT7475_VOLTAGE_COUNT	5	/* Not counting Vtt */
119 #define ADT7475_TEMP_COUNT	3
120 #define ADT7475_TACH_COUNT	4
121 #define ADT7475_PWM_COUNT	3
122 
123 /* Macro to read the registers */
124 
125 #define adt7475_read(reg) i2c_smbus_read_byte_data(client, (reg))
126 
127 /* Macros to easily index the registers */
128 
129 #define TACH_REG(idx) (REG_TACH_BASE + ((idx) * 2))
130 #define TACH_MIN_REG(idx) (REG_TACH_MIN_BASE + ((idx) * 2))
131 
132 #define PWM_REG(idx) (REG_PWM_BASE + (idx))
133 #define PWM_MAX_REG(idx) (REG_PWM_MAX_BASE + (idx))
134 #define PWM_MIN_REG(idx) (REG_PWM_MIN_BASE + (idx))
135 #define PWM_CONFIG_REG(idx) (REG_PWM_CONFIG_BASE + (idx))
136 
137 #define VOLTAGE_REG(idx) (REG_VOLTAGE_BASE + (idx))
138 #define VOLTAGE_MIN_REG(idx) (REG_VOLTAGE_MIN_BASE + ((idx) * 2))
139 #define VOLTAGE_MAX_REG(idx) (REG_VOLTAGE_MAX_BASE + ((idx) * 2))
140 
141 #define TEMP_REG(idx) (REG_TEMP_BASE + (idx))
142 #define TEMP_MIN_REG(idx) (REG_TEMP_MIN_BASE + ((idx) * 2))
143 #define TEMP_MAX_REG(idx) (REG_TEMP_MAX_BASE + ((idx) * 2))
144 #define TEMP_TMIN_REG(idx) (REG_TEMP_TMIN_BASE + (idx))
145 #define TEMP_THERM_REG(idx) (REG_TEMP_THERM_BASE + (idx))
146 #define TEMP_OFFSET_REG(idx) (REG_TEMP_OFFSET_BASE + (idx))
147 #define TEMP_TRANGE_REG(idx) (REG_TEMP_TRANGE_BASE + (idx))
148 
149 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
150 
151 enum chips { adt7473, adt7475, adt7476, adt7490 };
152 
153 static const struct i2c_device_id adt7475_id[] = {
154 	{ "adt7473", adt7473 },
155 	{ "adt7475", adt7475 },
156 	{ "adt7476", adt7476 },
157 	{ "adt7490", adt7490 },
158 	{ }
159 };
160 MODULE_DEVICE_TABLE(i2c, adt7475_id);
161 
162 struct adt7475_data {
163 	struct device *hwmon_dev;
164 	struct mutex lock;
165 
166 	unsigned long measure_updated;
167 	unsigned long limits_updated;
168 	char valid;
169 
170 	u8 config4;
171 	u8 config5;
172 	u8 has_voltage;
173 	u8 bypass_attn;		/* Bypass voltage attenuator */
174 	u8 has_pwm2:1;
175 	u8 has_fan4:1;
176 	u8 has_vid:1;
177 	u32 alarms;
178 	u16 voltage[3][6];
179 	u16 temp[7][3];
180 	u16 tach[2][4];
181 	u8 pwm[4][3];
182 	u8 range[3];
183 	u8 pwmctl[3];
184 	u8 pwmchan[3];
185 
186 	u8 vid;
187 	u8 vrm;
188 };
189 
190 static struct i2c_driver adt7475_driver;
191 static struct adt7475_data *adt7475_update_device(struct device *dev);
192 static void adt7475_read_hystersis(struct i2c_client *client);
193 static void adt7475_read_pwm(struct i2c_client *client, int index);
194 
195 /* Given a temp value, convert it to register value */
196 
197 static inline u16 temp2reg(struct adt7475_data *data, long val)
198 {
199 	u16 ret;
200 
201 	if (!(data->config5 & CONFIG5_TWOSCOMP)) {
202 		val = SENSORS_LIMIT(val, -64000, 191000);
203 		ret = (val + 64500) / 1000;
204 	} else {
205 		val = SENSORS_LIMIT(val, -128000, 127000);
206 		if (val < -500)
207 			ret = (256500 + val) / 1000;
208 		else
209 			ret = (val + 500) / 1000;
210 	}
211 
212 	return ret << 2;
213 }
214 
215 /* Given a register value, convert it to a real temp value */
216 
217 static inline int reg2temp(struct adt7475_data *data, u16 reg)
218 {
219 	if (data->config5 & CONFIG5_TWOSCOMP) {
220 		if (reg >= 512)
221 			return (reg - 1024) * 250;
222 		else
223 			return reg * 250;
224 	} else
225 		return (reg - 256) * 250;
226 }
227 
228 static inline int tach2rpm(u16 tach)
229 {
230 	if (tach == 0 || tach == 0xFFFF)
231 		return 0;
232 
233 	return (90000 * 60) / tach;
234 }
235 
236 static inline u16 rpm2tach(unsigned long rpm)
237 {
238 	if (rpm == 0)
239 		return 0;
240 
241 	return SENSORS_LIMIT((90000 * 60) / rpm, 1, 0xFFFF);
242 }
243 
244 /* Scaling factors for voltage inputs, taken from the ADT7490 datasheet */
245 static const int adt7473_in_scaling[ADT7475_VOLTAGE_COUNT + 1][2] = {
246 	{ 45, 94 },	/* +2.5V */
247 	{ 175, 525 },	/* Vccp */
248 	{ 68, 71 },	/* Vcc */
249 	{ 93, 47 },	/* +5V */
250 	{ 120, 20 },	/* +12V */
251 	{ 45, 45 },	/* Vtt */
252 };
253 
254 static inline int reg2volt(int channel, u16 reg, u8 bypass_attn)
255 {
256 	const int *r = adt7473_in_scaling[channel];
257 
258 	if (bypass_attn & (1 << channel))
259 		return DIV_ROUND_CLOSEST(reg * 2250, 1024);
260 	return DIV_ROUND_CLOSEST(reg * (r[0] + r[1]) * 2250, r[1] * 1024);
261 }
262 
263 static inline u16 volt2reg(int channel, long volt, u8 bypass_attn)
264 {
265 	const int *r = adt7473_in_scaling[channel];
266 	long reg;
267 
268 	if (bypass_attn & (1 << channel))
269 		reg = (volt * 1024) / 2250;
270 	else
271 		reg = (volt * r[1] * 1024) / ((r[0] + r[1]) * 2250);
272 	return SENSORS_LIMIT(reg, 0, 1023) & (0xff << 2);
273 }
274 
275 static u16 adt7475_read_word(struct i2c_client *client, int reg)
276 {
277 	u16 val;
278 
279 	val = i2c_smbus_read_byte_data(client, reg);
280 	val |= (i2c_smbus_read_byte_data(client, reg + 1) << 8);
281 
282 	return val;
283 }
284 
285 static void adt7475_write_word(struct i2c_client *client, int reg, u16 val)
286 {
287 	i2c_smbus_write_byte_data(client, reg + 1, val >> 8);
288 	i2c_smbus_write_byte_data(client, reg, val & 0xFF);
289 }
290 
291 /* Find the nearest value in a table - used for pwm frequency and
292    auto temp range */
293 static int find_nearest(long val, const int *array, int size)
294 {
295 	int i;
296 
297 	if (val < array[0])
298 		return 0;
299 
300 	if (val > array[size - 1])
301 		return size - 1;
302 
303 	for (i = 0; i < size - 1; i++) {
304 		int a, b;
305 
306 		if (val > array[i + 1])
307 			continue;
308 
309 		a = val - array[i];
310 		b = array[i + 1] - val;
311 
312 		return (a <= b) ? i : i + 1;
313 	}
314 
315 	return 0;
316 }
317 
318 static ssize_t show_voltage(struct device *dev, struct device_attribute *attr,
319 			    char *buf)
320 {
321 	struct adt7475_data *data = adt7475_update_device(dev);
322 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
323 	unsigned short val;
324 
325 	switch (sattr->nr) {
326 	case ALARM:
327 		return sprintf(buf, "%d\n",
328 			       (data->alarms >> sattr->index) & 1);
329 	default:
330 		val = data->voltage[sattr->nr][sattr->index];
331 		return sprintf(buf, "%d\n",
332 			       reg2volt(sattr->index, val, data->bypass_attn));
333 	}
334 }
335 
336 static ssize_t set_voltage(struct device *dev, struct device_attribute *attr,
337 			   const char *buf, size_t count)
338 {
339 
340 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
341 	struct i2c_client *client = to_i2c_client(dev);
342 	struct adt7475_data *data = i2c_get_clientdata(client);
343 	unsigned char reg;
344 	long val;
345 
346 	if (strict_strtol(buf, 10, &val))
347 		return -EINVAL;
348 
349 	mutex_lock(&data->lock);
350 
351 	data->voltage[sattr->nr][sattr->index] =
352 				volt2reg(sattr->index, val, data->bypass_attn);
353 
354 	if (sattr->index < ADT7475_VOLTAGE_COUNT) {
355 		if (sattr->nr == MIN)
356 			reg = VOLTAGE_MIN_REG(sattr->index);
357 		else
358 			reg = VOLTAGE_MAX_REG(sattr->index);
359 	} else {
360 		if (sattr->nr == MIN)
361 			reg = REG_VTT_MIN;
362 		else
363 			reg = REG_VTT_MAX;
364 	}
365 
366 	i2c_smbus_write_byte_data(client, reg,
367 				  data->voltage[sattr->nr][sattr->index] >> 2);
368 	mutex_unlock(&data->lock);
369 
370 	return count;
371 }
372 
373 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
374 			 char *buf)
375 {
376 	struct adt7475_data *data = adt7475_update_device(dev);
377 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
378 	int out;
379 
380 	switch (sattr->nr) {
381 	case HYSTERSIS:
382 		mutex_lock(&data->lock);
383 		out = data->temp[sattr->nr][sattr->index];
384 		if (sattr->index != 1)
385 			out = (out >> 4) & 0xF;
386 		else
387 			out = (out & 0xF);
388 		/* Show the value as an absolute number tied to
389 		 * THERM */
390 		out = reg2temp(data, data->temp[THERM][sattr->index]) -
391 			out * 1000;
392 		mutex_unlock(&data->lock);
393 		break;
394 
395 	case OFFSET:
396 		/* Offset is always 2's complement, regardless of the
397 		 * setting in CONFIG5 */
398 		mutex_lock(&data->lock);
399 		out = (s8)data->temp[sattr->nr][sattr->index];
400 		if (data->config5 & CONFIG5_TEMPOFFSET)
401 			out *= 1000;
402 		else
403 			out *= 500;
404 		mutex_unlock(&data->lock);
405 		break;
406 
407 	case ALARM:
408 		out = (data->alarms >> (sattr->index + 4)) & 1;
409 		break;
410 
411 	case FAULT:
412 		/* Note - only for remote1 and remote2 */
413 		out = !!(data->alarms & (sattr->index ? 0x8000 : 0x4000));
414 		break;
415 
416 	default:
417 		/* All other temp values are in the configured format */
418 		out = reg2temp(data, data->temp[sattr->nr][sattr->index]);
419 	}
420 
421 	return sprintf(buf, "%d\n", out);
422 }
423 
424 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
425 			const char *buf, size_t count)
426 {
427 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
428 	struct i2c_client *client = to_i2c_client(dev);
429 	struct adt7475_data *data = i2c_get_clientdata(client);
430 	unsigned char reg = 0;
431 	u8 out;
432 	int temp;
433 	long val;
434 
435 	if (strict_strtol(buf, 10, &val))
436 		return -EINVAL;
437 
438 	mutex_lock(&data->lock);
439 
440 	/* We need the config register in all cases for temp <-> reg conv. */
441 	data->config5 = adt7475_read(REG_CONFIG5);
442 
443 	switch (sattr->nr) {
444 	case OFFSET:
445 		if (data->config5 & CONFIG5_TEMPOFFSET) {
446 			val = SENSORS_LIMIT(val, -63000, 127000);
447 			out = data->temp[OFFSET][sattr->index] = val / 1000;
448 		} else {
449 			val = SENSORS_LIMIT(val, -63000, 64000);
450 			out = data->temp[OFFSET][sattr->index] = val / 500;
451 		}
452 		break;
453 
454 	case HYSTERSIS:
455 		/* The value will be given as an absolute value, turn it
456 		   into an offset based on THERM */
457 
458 		/* Read fresh THERM and HYSTERSIS values from the chip */
459 		data->temp[THERM][sattr->index] =
460 			adt7475_read(TEMP_THERM_REG(sattr->index)) << 2;
461 		adt7475_read_hystersis(client);
462 
463 		temp = reg2temp(data, data->temp[THERM][sattr->index]);
464 		val = SENSORS_LIMIT(val, temp - 15000, temp);
465 		val = (temp - val) / 1000;
466 
467 		if (sattr->index != 1) {
468 			data->temp[HYSTERSIS][sattr->index] &= 0xF0;
469 			data->temp[HYSTERSIS][sattr->index] |= (val & 0xF) << 4;
470 		} else {
471 			data->temp[HYSTERSIS][sattr->index] &= 0x0F;
472 			data->temp[HYSTERSIS][sattr->index] |= (val & 0xF);
473 		}
474 
475 		out = data->temp[HYSTERSIS][sattr->index];
476 		break;
477 
478 	default:
479 		data->temp[sattr->nr][sattr->index] = temp2reg(data, val);
480 
481 		/* We maintain an extra 2 digits of precision for simplicity
482 		 * - shift those back off before writing the value */
483 		out = (u8) (data->temp[sattr->nr][sattr->index] >> 2);
484 	}
485 
486 	switch (sattr->nr) {
487 	case MIN:
488 		reg = TEMP_MIN_REG(sattr->index);
489 		break;
490 	case MAX:
491 		reg = TEMP_MAX_REG(sattr->index);
492 		break;
493 	case OFFSET:
494 		reg = TEMP_OFFSET_REG(sattr->index);
495 		break;
496 	case AUTOMIN:
497 		reg = TEMP_TMIN_REG(sattr->index);
498 		break;
499 	case THERM:
500 		reg = TEMP_THERM_REG(sattr->index);
501 		break;
502 	case HYSTERSIS:
503 		if (sattr->index != 2)
504 			reg = REG_REMOTE1_HYSTERSIS;
505 		else
506 			reg = REG_REMOTE2_HYSTERSIS;
507 
508 		break;
509 	}
510 
511 	i2c_smbus_write_byte_data(client, reg, out);
512 
513 	mutex_unlock(&data->lock);
514 	return count;
515 }
516 
517 /* Table of autorange values - the user will write the value in millidegrees,
518    and we'll convert it */
519 static const int autorange_table[] = {
520 	2000, 2500, 3330, 4000, 5000, 6670, 8000,
521 	10000, 13330, 16000, 20000, 26670, 32000, 40000,
522 	53330, 80000
523 };
524 
525 static ssize_t show_point2(struct device *dev, struct device_attribute *attr,
526 			   char *buf)
527 {
528 	struct adt7475_data *data = adt7475_update_device(dev);
529 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
530 	int out, val;
531 
532 	mutex_lock(&data->lock);
533 	out = (data->range[sattr->index] >> 4) & 0x0F;
534 	val = reg2temp(data, data->temp[AUTOMIN][sattr->index]);
535 	mutex_unlock(&data->lock);
536 
537 	return sprintf(buf, "%d\n", val + autorange_table[out]);
538 }
539 
540 static ssize_t set_point2(struct device *dev, struct device_attribute *attr,
541 			  const char *buf, size_t count)
542 {
543 	struct i2c_client *client = to_i2c_client(dev);
544 	struct adt7475_data *data = i2c_get_clientdata(client);
545 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
546 	int temp;
547 	long val;
548 
549 	if (strict_strtol(buf, 10, &val))
550 		return -EINVAL;
551 
552 	mutex_lock(&data->lock);
553 
554 	/* Get a fresh copy of the needed registers */
555 	data->config5 = adt7475_read(REG_CONFIG5);
556 	data->temp[AUTOMIN][sattr->index] =
557 		adt7475_read(TEMP_TMIN_REG(sattr->index)) << 2;
558 	data->range[sattr->index] =
559 		adt7475_read(TEMP_TRANGE_REG(sattr->index));
560 
561 	/* The user will write an absolute value, so subtract the start point
562 	   to figure the range */
563 	temp = reg2temp(data, data->temp[AUTOMIN][sattr->index]);
564 	val = SENSORS_LIMIT(val, temp + autorange_table[0],
565 		temp + autorange_table[ARRAY_SIZE(autorange_table) - 1]);
566 	val -= temp;
567 
568 	/* Find the nearest table entry to what the user wrote */
569 	val = find_nearest(val, autorange_table, ARRAY_SIZE(autorange_table));
570 
571 	data->range[sattr->index] &= ~0xF0;
572 	data->range[sattr->index] |= val << 4;
573 
574 	i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index),
575 				  data->range[sattr->index]);
576 
577 	mutex_unlock(&data->lock);
578 	return count;
579 }
580 
581 static ssize_t show_tach(struct device *dev, struct device_attribute *attr,
582 			 char *buf)
583 {
584 	struct adt7475_data *data = adt7475_update_device(dev);
585 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
586 	int out;
587 
588 	if (sattr->nr == ALARM)
589 		out = (data->alarms >> (sattr->index + 10)) & 1;
590 	else
591 		out = tach2rpm(data->tach[sattr->nr][sattr->index]);
592 
593 	return sprintf(buf, "%d\n", out);
594 }
595 
596 static ssize_t set_tach(struct device *dev, struct device_attribute *attr,
597 			const char *buf, size_t count)
598 {
599 
600 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
601 	struct i2c_client *client = to_i2c_client(dev);
602 	struct adt7475_data *data = i2c_get_clientdata(client);
603 	unsigned long val;
604 
605 	if (strict_strtoul(buf, 10, &val))
606 		return -EINVAL;
607 
608 	mutex_lock(&data->lock);
609 
610 	data->tach[MIN][sattr->index] = rpm2tach(val);
611 
612 	adt7475_write_word(client, TACH_MIN_REG(sattr->index),
613 			   data->tach[MIN][sattr->index]);
614 
615 	mutex_unlock(&data->lock);
616 	return count;
617 }
618 
619 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
620 			char *buf)
621 {
622 	struct adt7475_data *data = adt7475_update_device(dev);
623 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
624 
625 	return sprintf(buf, "%d\n", data->pwm[sattr->nr][sattr->index]);
626 }
627 
628 static ssize_t show_pwmchan(struct device *dev, struct device_attribute *attr,
629 			    char *buf)
630 {
631 	struct adt7475_data *data = adt7475_update_device(dev);
632 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
633 
634 	return sprintf(buf, "%d\n", data->pwmchan[sattr->index]);
635 }
636 
637 static ssize_t show_pwmctrl(struct device *dev, struct device_attribute *attr,
638 			    char *buf)
639 {
640 	struct adt7475_data *data = adt7475_update_device(dev);
641 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
642 
643 	return sprintf(buf, "%d\n", data->pwmctl[sattr->index]);
644 }
645 
646 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
647 		       const char *buf, size_t count)
648 {
649 
650 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
651 	struct i2c_client *client = to_i2c_client(dev);
652 	struct adt7475_data *data = i2c_get_clientdata(client);
653 	unsigned char reg = 0;
654 	long val;
655 
656 	if (strict_strtol(buf, 10, &val))
657 		return -EINVAL;
658 
659 	mutex_lock(&data->lock);
660 
661 	switch (sattr->nr) {
662 	case INPUT:
663 		/* Get a fresh value for CONTROL */
664 		data->pwm[CONTROL][sattr->index] =
665 			adt7475_read(PWM_CONFIG_REG(sattr->index));
666 
667 		/* If we are not in manual mode, then we shouldn't allow
668 		 * the user to set the pwm speed */
669 		if (((data->pwm[CONTROL][sattr->index] >> 5) & 7) != 7) {
670 			mutex_unlock(&data->lock);
671 			return count;
672 		}
673 
674 		reg = PWM_REG(sattr->index);
675 		break;
676 
677 	case MIN:
678 		reg = PWM_MIN_REG(sattr->index);
679 		break;
680 
681 	case MAX:
682 		reg = PWM_MAX_REG(sattr->index);
683 		break;
684 	}
685 
686 	data->pwm[sattr->nr][sattr->index] = SENSORS_LIMIT(val, 0, 0xFF);
687 	i2c_smbus_write_byte_data(client, reg,
688 				  data->pwm[sattr->nr][sattr->index]);
689 
690 	mutex_unlock(&data->lock);
691 
692 	return count;
693 }
694 
695 /* Called by set_pwmctrl and set_pwmchan */
696 
697 static int hw_set_pwm(struct i2c_client *client, int index,
698 		      unsigned int pwmctl, unsigned int pwmchan)
699 {
700 	struct adt7475_data *data = i2c_get_clientdata(client);
701 	long val = 0;
702 
703 	switch (pwmctl) {
704 	case 0:
705 		val = 0x03;	/* Run at full speed */
706 		break;
707 	case 1:
708 		val = 0x07;	/* Manual mode */
709 		break;
710 	case 2:
711 		switch (pwmchan) {
712 		case 1:
713 			/* Remote1 controls PWM */
714 			val = 0x00;
715 			break;
716 		case 2:
717 			/* local controls PWM */
718 			val = 0x01;
719 			break;
720 		case 4:
721 			/* remote2 controls PWM */
722 			val = 0x02;
723 			break;
724 		case 6:
725 			/* local/remote2 control PWM */
726 			val = 0x05;
727 			break;
728 		case 7:
729 			/* All three control PWM */
730 			val = 0x06;
731 			break;
732 		default:
733 			return -EINVAL;
734 		}
735 		break;
736 	default:
737 		return -EINVAL;
738 	}
739 
740 	data->pwmctl[index] = pwmctl;
741 	data->pwmchan[index] = pwmchan;
742 
743 	data->pwm[CONTROL][index] &= ~0xE0;
744 	data->pwm[CONTROL][index] |= (val & 7) << 5;
745 
746 	i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
747 				  data->pwm[CONTROL][index]);
748 
749 	return 0;
750 }
751 
752 static ssize_t set_pwmchan(struct device *dev, struct device_attribute *attr,
753 			   const char *buf, size_t count)
754 {
755 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
756 	struct i2c_client *client = to_i2c_client(dev);
757 	struct adt7475_data *data = i2c_get_clientdata(client);
758 	int r;
759 	long val;
760 
761 	if (strict_strtol(buf, 10, &val))
762 		return -EINVAL;
763 
764 	mutex_lock(&data->lock);
765 	/* Read Modify Write PWM values */
766 	adt7475_read_pwm(client, sattr->index);
767 	r = hw_set_pwm(client, sattr->index, data->pwmctl[sattr->index], val);
768 	if (r)
769 		count = r;
770 	mutex_unlock(&data->lock);
771 
772 	return count;
773 }
774 
775 static ssize_t set_pwmctrl(struct device *dev, struct device_attribute *attr,
776 			   const char *buf, size_t count)
777 {
778 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
779 	struct i2c_client *client = to_i2c_client(dev);
780 	struct adt7475_data *data = i2c_get_clientdata(client);
781 	int r;
782 	long val;
783 
784 	if (strict_strtol(buf, 10, &val))
785 		return -EINVAL;
786 
787 	mutex_lock(&data->lock);
788 	/* Read Modify Write PWM values */
789 	adt7475_read_pwm(client, sattr->index);
790 	r = hw_set_pwm(client, sattr->index, val, data->pwmchan[sattr->index]);
791 	if (r)
792 		count = r;
793 	mutex_unlock(&data->lock);
794 
795 	return count;
796 }
797 
798 /* List of frequencies for the PWM */
799 static const int pwmfreq_table[] = {
800 	11, 14, 22, 29, 35, 44, 58, 88
801 };
802 
803 static ssize_t show_pwmfreq(struct device *dev, struct device_attribute *attr,
804 			    char *buf)
805 {
806 	struct adt7475_data *data = adt7475_update_device(dev);
807 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
808 
809 	return sprintf(buf, "%d\n",
810 		       pwmfreq_table[data->range[sattr->index] & 7]);
811 }
812 
813 static ssize_t set_pwmfreq(struct device *dev, struct device_attribute *attr,
814 			   const char *buf, size_t count)
815 {
816 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
817 	struct i2c_client *client = to_i2c_client(dev);
818 	struct adt7475_data *data = i2c_get_clientdata(client);
819 	int out;
820 	long val;
821 
822 	if (strict_strtol(buf, 10, &val))
823 		return -EINVAL;
824 
825 	out = find_nearest(val, pwmfreq_table, ARRAY_SIZE(pwmfreq_table));
826 
827 	mutex_lock(&data->lock);
828 
829 	data->range[sattr->index] =
830 		adt7475_read(TEMP_TRANGE_REG(sattr->index));
831 	data->range[sattr->index] &= ~7;
832 	data->range[sattr->index] |= out;
833 
834 	i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index),
835 				  data->range[sattr->index]);
836 
837 	mutex_unlock(&data->lock);
838 	return count;
839 }
840 
841 static ssize_t show_pwm_at_crit(struct device *dev,
842 				struct device_attribute *devattr, char *buf)
843 {
844 	struct adt7475_data *data = adt7475_update_device(dev);
845 	return sprintf(buf, "%d\n", !!(data->config4 & CONFIG4_MAXDUTY));
846 }
847 
848 static ssize_t set_pwm_at_crit(struct device *dev,
849 			       struct device_attribute *devattr,
850 			       const char *buf, size_t count)
851 {
852 	struct i2c_client *client = to_i2c_client(dev);
853 	struct adt7475_data *data = i2c_get_clientdata(client);
854 	long val;
855 
856 	if (strict_strtol(buf, 10, &val))
857 		return -EINVAL;
858 	if (val != 0 && val != 1)
859 		return -EINVAL;
860 
861 	mutex_lock(&data->lock);
862 	data->config4 = i2c_smbus_read_byte_data(client, REG_CONFIG4);
863 	if (val)
864 		data->config4 |= CONFIG4_MAXDUTY;
865 	else
866 		data->config4 &= ~CONFIG4_MAXDUTY;
867 	i2c_smbus_write_byte_data(client, REG_CONFIG4, data->config4);
868 	mutex_unlock(&data->lock);
869 
870 	return count;
871 }
872 
873 static ssize_t show_vrm(struct device *dev, struct device_attribute *devattr,
874 			char *buf)
875 {
876 	struct adt7475_data *data = dev_get_drvdata(dev);
877 	return sprintf(buf, "%d\n", (int)data->vrm);
878 }
879 
880 static ssize_t set_vrm(struct device *dev, struct device_attribute *devattr,
881 		       const char *buf, size_t count)
882 {
883 	struct adt7475_data *data = dev_get_drvdata(dev);
884 	long val;
885 
886 	if (strict_strtol(buf, 10, &val))
887 		return -EINVAL;
888 	if (val < 0 || val > 255)
889 		return -EINVAL;
890 	data->vrm = val;
891 
892 	return count;
893 }
894 
895 static ssize_t show_vid(struct device *dev, struct device_attribute *devattr,
896 			char *buf)
897 {
898 	struct adt7475_data *data = adt7475_update_device(dev);
899 	return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
900 }
901 
902 static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_voltage, NULL, INPUT, 0);
903 static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_voltage,
904 			    set_voltage, MAX, 0);
905 static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_voltage,
906 			    set_voltage, MIN, 0);
907 static SENSOR_DEVICE_ATTR_2(in0_alarm, S_IRUGO, show_voltage, NULL, ALARM, 0);
908 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_voltage, NULL, INPUT, 1);
909 static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_voltage,
910 			    set_voltage, MAX, 1);
911 static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_voltage,
912 			    set_voltage, MIN, 1);
913 static SENSOR_DEVICE_ATTR_2(in1_alarm, S_IRUGO, show_voltage, NULL, ALARM, 1);
914 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_voltage, NULL, INPUT, 2);
915 static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_voltage,
916 			    set_voltage, MAX, 2);
917 static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_voltage,
918 			    set_voltage, MIN, 2);
919 static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, show_voltage, NULL, ALARM, 2);
920 static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_voltage, NULL, INPUT, 3);
921 static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_voltage,
922 			    set_voltage, MAX, 3);
923 static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_voltage,
924 			    set_voltage, MIN, 3);
925 static SENSOR_DEVICE_ATTR_2(in3_alarm, S_IRUGO, show_voltage, NULL, ALARM, 3);
926 static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_voltage, NULL, INPUT, 4);
927 static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_voltage,
928 			    set_voltage, MAX, 4);
929 static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_voltage,
930 			    set_voltage, MIN, 4);
931 static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, show_voltage, NULL, ALARM, 8);
932 static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_voltage, NULL, INPUT, 5);
933 static SENSOR_DEVICE_ATTR_2(in5_max, S_IRUGO | S_IWUSR, show_voltage,
934 			    set_voltage, MAX, 5);
935 static SENSOR_DEVICE_ATTR_2(in5_min, S_IRUGO | S_IWUSR, show_voltage,
936 			    set_voltage, MIN, 5);
937 static SENSOR_DEVICE_ATTR_2(in5_alarm, S_IRUGO, show_voltage, NULL, ALARM, 31);
938 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, INPUT, 0);
939 static SENSOR_DEVICE_ATTR_2(temp1_alarm, S_IRUGO, show_temp, NULL, ALARM, 0);
940 static SENSOR_DEVICE_ATTR_2(temp1_fault, S_IRUGO, show_temp, NULL, FAULT, 0);
941 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
942 			    MAX, 0);
943 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
944 			    MIN, 0);
945 static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
946 			    set_temp, OFFSET, 0);
947 static SENSOR_DEVICE_ATTR_2(temp1_auto_point1_temp, S_IRUGO | S_IWUSR,
948 			    show_temp, set_temp, AUTOMIN, 0);
949 static SENSOR_DEVICE_ATTR_2(temp1_auto_point2_temp, S_IRUGO | S_IWUSR,
950 			    show_point2, set_point2, 0, 0);
951 static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
952 			    THERM, 0);
953 static SENSOR_DEVICE_ATTR_2(temp1_crit_hyst, S_IRUGO | S_IWUSR, show_temp,
954 			    set_temp, HYSTERSIS, 0);
955 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, INPUT, 1);
956 static SENSOR_DEVICE_ATTR_2(temp2_alarm, S_IRUGO, show_temp, NULL, ALARM, 1);
957 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
958 			    MAX, 1);
959 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
960 			    MIN, 1);
961 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
962 			    set_temp, OFFSET, 1);
963 static SENSOR_DEVICE_ATTR_2(temp2_auto_point1_temp, S_IRUGO | S_IWUSR,
964 			    show_temp, set_temp, AUTOMIN, 1);
965 static SENSOR_DEVICE_ATTR_2(temp2_auto_point2_temp, S_IRUGO | S_IWUSR,
966 			    show_point2, set_point2, 0, 1);
967 static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
968 			    THERM, 1);
969 static SENSOR_DEVICE_ATTR_2(temp2_crit_hyst, S_IRUGO | S_IWUSR, show_temp,
970 			    set_temp, HYSTERSIS, 1);
971 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, INPUT, 2);
972 static SENSOR_DEVICE_ATTR_2(temp3_alarm, S_IRUGO, show_temp, NULL, ALARM, 2);
973 static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_temp, NULL, FAULT, 2);
974 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
975 			    MAX, 2);
976 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
977 			    MIN, 2);
978 static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
979 			    set_temp, OFFSET, 2);
980 static SENSOR_DEVICE_ATTR_2(temp3_auto_point1_temp, S_IRUGO | S_IWUSR,
981 			    show_temp, set_temp, AUTOMIN, 2);
982 static SENSOR_DEVICE_ATTR_2(temp3_auto_point2_temp, S_IRUGO | S_IWUSR,
983 			    show_point2, set_point2, 0, 2);
984 static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
985 			    THERM, 2);
986 static SENSOR_DEVICE_ATTR_2(temp3_crit_hyst, S_IRUGO | S_IWUSR, show_temp,
987 			    set_temp, HYSTERSIS, 2);
988 static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_tach, NULL, INPUT, 0);
989 static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
990 			    MIN, 0);
991 static SENSOR_DEVICE_ATTR_2(fan1_alarm, S_IRUGO, show_tach, NULL, ALARM, 0);
992 static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_tach, NULL, INPUT, 1);
993 static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
994 			    MIN, 1);
995 static SENSOR_DEVICE_ATTR_2(fan2_alarm, S_IRUGO, show_tach, NULL, ALARM, 1);
996 static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_tach, NULL, INPUT, 2);
997 static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
998 			    MIN, 2);
999 static SENSOR_DEVICE_ATTR_2(fan3_alarm, S_IRUGO, show_tach, NULL, ALARM, 2);
1000 static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_tach, NULL, INPUT, 3);
1001 static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
1002 			    MIN, 3);
1003 static SENSOR_DEVICE_ATTR_2(fan4_alarm, S_IRUGO, show_tach, NULL, ALARM, 3);
1004 static SENSOR_DEVICE_ATTR_2(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT,
1005 			    0);
1006 static SENSOR_DEVICE_ATTR_2(pwm1_freq, S_IRUGO | S_IWUSR, show_pwmfreq,
1007 			    set_pwmfreq, INPUT, 0);
1008 static SENSOR_DEVICE_ATTR_2(pwm1_enable, S_IRUGO | S_IWUSR, show_pwmctrl,
1009 			    set_pwmctrl, INPUT, 0);
1010 static SENSOR_DEVICE_ATTR_2(pwm1_auto_channels_temp, S_IRUGO | S_IWUSR,
1011 			    show_pwmchan, set_pwmchan, INPUT, 0);
1012 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm,
1013 			    set_pwm, MIN, 0);
1014 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm,
1015 			    set_pwm, MAX, 0);
1016 static SENSOR_DEVICE_ATTR_2(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT,
1017 			    1);
1018 static SENSOR_DEVICE_ATTR_2(pwm2_freq, S_IRUGO | S_IWUSR, show_pwmfreq,
1019 			    set_pwmfreq, INPUT, 1);
1020 static SENSOR_DEVICE_ATTR_2(pwm2_enable, S_IRUGO | S_IWUSR, show_pwmctrl,
1021 			    set_pwmctrl, INPUT, 1);
1022 static SENSOR_DEVICE_ATTR_2(pwm2_auto_channels_temp, S_IRUGO | S_IWUSR,
1023 			    show_pwmchan, set_pwmchan, INPUT, 1);
1024 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm,
1025 			    set_pwm, MIN, 1);
1026 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm,
1027 			    set_pwm, MAX, 1);
1028 static SENSOR_DEVICE_ATTR_2(pwm3, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT,
1029 			    2);
1030 static SENSOR_DEVICE_ATTR_2(pwm3_freq, S_IRUGO | S_IWUSR, show_pwmfreq,
1031 			    set_pwmfreq, INPUT, 2);
1032 static SENSOR_DEVICE_ATTR_2(pwm3_enable, S_IRUGO | S_IWUSR, show_pwmctrl,
1033 			    set_pwmctrl, INPUT, 2);
1034 static SENSOR_DEVICE_ATTR_2(pwm3_auto_channels_temp, S_IRUGO | S_IWUSR,
1035 			    show_pwmchan, set_pwmchan, INPUT, 2);
1036 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm,
1037 			    set_pwm, MIN, 2);
1038 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm,
1039 			    set_pwm, MAX, 2);
1040 
1041 /* Non-standard name, might need revisiting */
1042 static DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO,
1043 		   show_pwm_at_crit, set_pwm_at_crit);
1044 
1045 static DEVICE_ATTR(vrm, S_IWUSR | S_IRUGO, show_vrm, set_vrm);
1046 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
1047 
1048 static struct attribute *adt7475_attrs[] = {
1049 	&sensor_dev_attr_in1_input.dev_attr.attr,
1050 	&sensor_dev_attr_in1_max.dev_attr.attr,
1051 	&sensor_dev_attr_in1_min.dev_attr.attr,
1052 	&sensor_dev_attr_in1_alarm.dev_attr.attr,
1053 	&sensor_dev_attr_in2_input.dev_attr.attr,
1054 	&sensor_dev_attr_in2_max.dev_attr.attr,
1055 	&sensor_dev_attr_in2_min.dev_attr.attr,
1056 	&sensor_dev_attr_in2_alarm.dev_attr.attr,
1057 	&sensor_dev_attr_temp1_input.dev_attr.attr,
1058 	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
1059 	&sensor_dev_attr_temp1_fault.dev_attr.attr,
1060 	&sensor_dev_attr_temp1_max.dev_attr.attr,
1061 	&sensor_dev_attr_temp1_min.dev_attr.attr,
1062 	&sensor_dev_attr_temp1_offset.dev_attr.attr,
1063 	&sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
1064 	&sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
1065 	&sensor_dev_attr_temp1_crit.dev_attr.attr,
1066 	&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
1067 	&sensor_dev_attr_temp2_input.dev_attr.attr,
1068 	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
1069 	&sensor_dev_attr_temp2_max.dev_attr.attr,
1070 	&sensor_dev_attr_temp2_min.dev_attr.attr,
1071 	&sensor_dev_attr_temp2_offset.dev_attr.attr,
1072 	&sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
1073 	&sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
1074 	&sensor_dev_attr_temp2_crit.dev_attr.attr,
1075 	&sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
1076 	&sensor_dev_attr_temp3_input.dev_attr.attr,
1077 	&sensor_dev_attr_temp3_fault.dev_attr.attr,
1078 	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
1079 	&sensor_dev_attr_temp3_max.dev_attr.attr,
1080 	&sensor_dev_attr_temp3_min.dev_attr.attr,
1081 	&sensor_dev_attr_temp3_offset.dev_attr.attr,
1082 	&sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
1083 	&sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
1084 	&sensor_dev_attr_temp3_crit.dev_attr.attr,
1085 	&sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
1086 	&sensor_dev_attr_fan1_input.dev_attr.attr,
1087 	&sensor_dev_attr_fan1_min.dev_attr.attr,
1088 	&sensor_dev_attr_fan1_alarm.dev_attr.attr,
1089 	&sensor_dev_attr_fan2_input.dev_attr.attr,
1090 	&sensor_dev_attr_fan2_min.dev_attr.attr,
1091 	&sensor_dev_attr_fan2_alarm.dev_attr.attr,
1092 	&sensor_dev_attr_fan3_input.dev_attr.attr,
1093 	&sensor_dev_attr_fan3_min.dev_attr.attr,
1094 	&sensor_dev_attr_fan3_alarm.dev_attr.attr,
1095 	&sensor_dev_attr_pwm1.dev_attr.attr,
1096 	&sensor_dev_attr_pwm1_freq.dev_attr.attr,
1097 	&sensor_dev_attr_pwm1_enable.dev_attr.attr,
1098 	&sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1099 	&sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1100 	&sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1101 	&sensor_dev_attr_pwm3.dev_attr.attr,
1102 	&sensor_dev_attr_pwm3_freq.dev_attr.attr,
1103 	&sensor_dev_attr_pwm3_enable.dev_attr.attr,
1104 	&sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1105 	&sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1106 	&sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1107 	&dev_attr_pwm_use_point2_pwm_at_crit.attr,
1108 	NULL,
1109 };
1110 
1111 static struct attribute *fan4_attrs[] = {
1112 	&sensor_dev_attr_fan4_input.dev_attr.attr,
1113 	&sensor_dev_attr_fan4_min.dev_attr.attr,
1114 	&sensor_dev_attr_fan4_alarm.dev_attr.attr,
1115 	NULL
1116 };
1117 
1118 static struct attribute *pwm2_attrs[] = {
1119 	&sensor_dev_attr_pwm2.dev_attr.attr,
1120 	&sensor_dev_attr_pwm2_freq.dev_attr.attr,
1121 	&sensor_dev_attr_pwm2_enable.dev_attr.attr,
1122 	&sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1123 	&sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1124 	&sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1125 	NULL
1126 };
1127 
1128 static struct attribute *in0_attrs[] = {
1129 	&sensor_dev_attr_in0_input.dev_attr.attr,
1130 	&sensor_dev_attr_in0_max.dev_attr.attr,
1131 	&sensor_dev_attr_in0_min.dev_attr.attr,
1132 	&sensor_dev_attr_in0_alarm.dev_attr.attr,
1133 	NULL
1134 };
1135 
1136 static struct attribute *in3_attrs[] = {
1137 	&sensor_dev_attr_in3_input.dev_attr.attr,
1138 	&sensor_dev_attr_in3_max.dev_attr.attr,
1139 	&sensor_dev_attr_in3_min.dev_attr.attr,
1140 	&sensor_dev_attr_in3_alarm.dev_attr.attr,
1141 	NULL
1142 };
1143 
1144 static struct attribute *in4_attrs[] = {
1145 	&sensor_dev_attr_in4_input.dev_attr.attr,
1146 	&sensor_dev_attr_in4_max.dev_attr.attr,
1147 	&sensor_dev_attr_in4_min.dev_attr.attr,
1148 	&sensor_dev_attr_in4_alarm.dev_attr.attr,
1149 	NULL
1150 };
1151 
1152 static struct attribute *in5_attrs[] = {
1153 	&sensor_dev_attr_in5_input.dev_attr.attr,
1154 	&sensor_dev_attr_in5_max.dev_attr.attr,
1155 	&sensor_dev_attr_in5_min.dev_attr.attr,
1156 	&sensor_dev_attr_in5_alarm.dev_attr.attr,
1157 	NULL
1158 };
1159 
1160 static struct attribute *vid_attrs[] = {
1161 	&dev_attr_cpu0_vid.attr,
1162 	&dev_attr_vrm.attr,
1163 	NULL
1164 };
1165 
1166 static struct attribute_group adt7475_attr_group = { .attrs = adt7475_attrs };
1167 static struct attribute_group fan4_attr_group = { .attrs = fan4_attrs };
1168 static struct attribute_group pwm2_attr_group = { .attrs = pwm2_attrs };
1169 static struct attribute_group in0_attr_group = { .attrs = in0_attrs };
1170 static struct attribute_group in3_attr_group = { .attrs = in3_attrs };
1171 static struct attribute_group in4_attr_group = { .attrs = in4_attrs };
1172 static struct attribute_group in5_attr_group = { .attrs = in5_attrs };
1173 static struct attribute_group vid_attr_group = { .attrs = vid_attrs };
1174 
1175 static int adt7475_detect(struct i2c_client *client,
1176 			  struct i2c_board_info *info)
1177 {
1178 	struct i2c_adapter *adapter = client->adapter;
1179 	int vendid, devid, devid2;
1180 	const char *name;
1181 
1182 	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1183 		return -ENODEV;
1184 
1185 	vendid = adt7475_read(REG_VENDID);
1186 	devid2 = adt7475_read(REG_DEVID2);
1187 	if (vendid != 0x41 ||		/* Analog Devices */
1188 	    (devid2 & 0xf8) != 0x68)
1189 		return -ENODEV;
1190 
1191 	devid = adt7475_read(REG_DEVID);
1192 	if (devid == 0x73)
1193 		name = "adt7473";
1194 	else if (devid == 0x75 && client->addr == 0x2e)
1195 		name = "adt7475";
1196 	else if (devid == 0x76)
1197 		name = "adt7476";
1198 	else if ((devid2 & 0xfc) == 0x6c)
1199 		name = "adt7490";
1200 	else {
1201 		dev_dbg(&adapter->dev,
1202 			"Couldn't detect an ADT7473/75/76/90 part at "
1203 			"0x%02x\n", (unsigned int)client->addr);
1204 		return -ENODEV;
1205 	}
1206 
1207 	strlcpy(info->type, name, I2C_NAME_SIZE);
1208 
1209 	return 0;
1210 }
1211 
1212 static void adt7475_remove_files(struct i2c_client *client,
1213 				 struct adt7475_data *data)
1214 {
1215 	sysfs_remove_group(&client->dev.kobj, &adt7475_attr_group);
1216 	if (data->has_fan4)
1217 		sysfs_remove_group(&client->dev.kobj, &fan4_attr_group);
1218 	if (data->has_pwm2)
1219 		sysfs_remove_group(&client->dev.kobj, &pwm2_attr_group);
1220 	if (data->has_voltage & (1 << 0))
1221 		sysfs_remove_group(&client->dev.kobj, &in0_attr_group);
1222 	if (data->has_voltage & (1 << 3))
1223 		sysfs_remove_group(&client->dev.kobj, &in3_attr_group);
1224 	if (data->has_voltage & (1 << 4))
1225 		sysfs_remove_group(&client->dev.kobj, &in4_attr_group);
1226 	if (data->has_voltage & (1 << 5))
1227 		sysfs_remove_group(&client->dev.kobj, &in5_attr_group);
1228 	if (data->has_vid)
1229 		sysfs_remove_group(&client->dev.kobj, &vid_attr_group);
1230 }
1231 
1232 static int adt7475_probe(struct i2c_client *client,
1233 			 const struct i2c_device_id *id)
1234 {
1235 	static const char *names[] = {
1236 		[adt7473] = "ADT7473",
1237 		[adt7475] = "ADT7475",
1238 		[adt7476] = "ADT7476",
1239 		[adt7490] = "ADT7490",
1240 	};
1241 
1242 	struct adt7475_data *data;
1243 	int i, ret = 0, revision;
1244 	u8 config2, config3;
1245 
1246 	data = kzalloc(sizeof(*data), GFP_KERNEL);
1247 	if (data == NULL)
1248 		return -ENOMEM;
1249 
1250 	mutex_init(&data->lock);
1251 	i2c_set_clientdata(client, data);
1252 
1253 	/* Initialize device-specific values */
1254 	switch (id->driver_data) {
1255 	case adt7476:
1256 		data->has_voltage = 0x0e;	/* in1 to in3 */
1257 		revision = adt7475_read(REG_DEVID2) & 0x07;
1258 		break;
1259 	case adt7490:
1260 		data->has_voltage = 0x3e;	/* in1 to in5 */
1261 		revision = adt7475_read(REG_DEVID2) & 0x03;
1262 		if (revision == 0x03)
1263 			revision += adt7475_read(REG_DEVREV2);
1264 		break;
1265 	default:
1266 		data->has_voltage = 0x06;	/* in1, in2 */
1267 		revision = adt7475_read(REG_DEVID2) & 0x07;
1268 	}
1269 
1270 	config3 = adt7475_read(REG_CONFIG3);
1271 	/* Pin PWM2 may alternatively be used for ALERT output */
1272 	if (!(config3 & CONFIG3_SMBALERT))
1273 		data->has_pwm2 = 1;
1274 	/* Meaning of this bit is inverted for the ADT7473-1 */
1275 	if (id->driver_data == adt7473 && revision >= 1)
1276 		data->has_pwm2 = !data->has_pwm2;
1277 
1278 	data->config4 = adt7475_read(REG_CONFIG4);
1279 	/* Pin TACH4 may alternatively be used for THERM */
1280 	if ((data->config4 & CONFIG4_PINFUNC) == 0x0)
1281 		data->has_fan4 = 1;
1282 
1283 	/* THERM configuration is more complex on the ADT7476 and ADT7490,
1284 	   because 2 different pins (TACH4 and +2.5 Vin) can be used for
1285 	   this function */
1286 	if (id->driver_data == adt7490) {
1287 		if ((data->config4 & CONFIG4_PINFUNC) == 0x1 &&
1288 		    !(config3 & CONFIG3_THERM))
1289 			data->has_fan4 = 1;
1290 	}
1291 	if (id->driver_data == adt7476 || id->driver_data == adt7490) {
1292 		if (!(config3 & CONFIG3_THERM) ||
1293 		    (data->config4 & CONFIG4_PINFUNC) == 0x1)
1294 			data->has_voltage |= (1 << 0);		/* in0 */
1295 	}
1296 
1297 	/* On the ADT7476, the +12V input pin may instead be used as VID5,
1298 	   and VID pins may alternatively be used as GPIO */
1299 	if (id->driver_data == adt7476) {
1300 		u8 vid = adt7475_read(REG_VID);
1301 		if (!(vid & VID_VIDSEL))
1302 			data->has_voltage |= (1 << 4);		/* in4 */
1303 
1304 		data->has_vid = !(adt7475_read(REG_CONFIG5) & CONFIG5_VIDGPIO);
1305 	}
1306 
1307 	/* Voltage attenuators can be bypassed, globally or individually */
1308 	config2 = adt7475_read(REG_CONFIG2);
1309 	if (config2 & CONFIG2_ATTN) {
1310 		data->bypass_attn = (0x3 << 3) | 0x3;
1311 	} else {
1312 		data->bypass_attn = ((data->config4 & CONFIG4_ATTN_IN10) >> 4) |
1313 				    ((data->config4 & CONFIG4_ATTN_IN43) >> 3);
1314 	}
1315 	data->bypass_attn &= data->has_voltage;
1316 
1317 	/* Call adt7475_read_pwm for all pwm's as this will reprogram any
1318 	   pwm's which are disabled to manual mode with 0% duty cycle */
1319 	for (i = 0; i < ADT7475_PWM_COUNT; i++)
1320 		adt7475_read_pwm(client, i);
1321 
1322 	ret = sysfs_create_group(&client->dev.kobj, &adt7475_attr_group);
1323 	if (ret)
1324 		goto efree;
1325 
1326 	/* Features that can be disabled individually */
1327 	if (data->has_fan4) {
1328 		ret = sysfs_create_group(&client->dev.kobj, &fan4_attr_group);
1329 		if (ret)
1330 			goto eremove;
1331 	}
1332 	if (data->has_pwm2) {
1333 		ret = sysfs_create_group(&client->dev.kobj, &pwm2_attr_group);
1334 		if (ret)
1335 			goto eremove;
1336 	}
1337 	if (data->has_voltage & (1 << 0)) {
1338 		ret = sysfs_create_group(&client->dev.kobj, &in0_attr_group);
1339 		if (ret)
1340 			goto eremove;
1341 	}
1342 	if (data->has_voltage & (1 << 3)) {
1343 		ret = sysfs_create_group(&client->dev.kobj, &in3_attr_group);
1344 		if (ret)
1345 			goto eremove;
1346 	}
1347 	if (data->has_voltage & (1 << 4)) {
1348 		ret = sysfs_create_group(&client->dev.kobj, &in4_attr_group);
1349 		if (ret)
1350 			goto eremove;
1351 	}
1352 	if (data->has_voltage & (1 << 5)) {
1353 		ret = sysfs_create_group(&client->dev.kobj, &in5_attr_group);
1354 		if (ret)
1355 			goto eremove;
1356 	}
1357 	if (data->has_vid) {
1358 		data->vrm = vid_which_vrm();
1359 		ret = sysfs_create_group(&client->dev.kobj, &vid_attr_group);
1360 		if (ret)
1361 			goto eremove;
1362 	}
1363 
1364 	data->hwmon_dev = hwmon_device_register(&client->dev);
1365 	if (IS_ERR(data->hwmon_dev)) {
1366 		ret = PTR_ERR(data->hwmon_dev);
1367 		goto eremove;
1368 	}
1369 
1370 	dev_info(&client->dev, "%s device, revision %d\n",
1371 		 names[id->driver_data], revision);
1372 	if ((data->has_voltage & 0x11) || data->has_fan4 || data->has_pwm2)
1373 		dev_info(&client->dev, "Optional features:%s%s%s%s%s\n",
1374 			 (data->has_voltage & (1 << 0)) ? " in0" : "",
1375 			 (data->has_voltage & (1 << 4)) ? " in4" : "",
1376 			 data->has_fan4 ? " fan4" : "",
1377 			 data->has_pwm2 ? " pwm2" : "",
1378 			 data->has_vid ? " vid" : "");
1379 	if (data->bypass_attn)
1380 		dev_info(&client->dev, "Bypassing attenuators on:%s%s%s%s\n",
1381 			 (data->bypass_attn & (1 << 0)) ? " in0" : "",
1382 			 (data->bypass_attn & (1 << 1)) ? " in1" : "",
1383 			 (data->bypass_attn & (1 << 3)) ? " in3" : "",
1384 			 (data->bypass_attn & (1 << 4)) ? " in4" : "");
1385 
1386 	return 0;
1387 
1388 eremove:
1389 	adt7475_remove_files(client, data);
1390 efree:
1391 	kfree(data);
1392 	return ret;
1393 }
1394 
1395 static int adt7475_remove(struct i2c_client *client)
1396 {
1397 	struct adt7475_data *data = i2c_get_clientdata(client);
1398 
1399 	hwmon_device_unregister(data->hwmon_dev);
1400 	adt7475_remove_files(client, data);
1401 	kfree(data);
1402 
1403 	return 0;
1404 }
1405 
1406 static struct i2c_driver adt7475_driver = {
1407 	.class		= I2C_CLASS_HWMON,
1408 	.driver = {
1409 		.name	= "adt7475",
1410 	},
1411 	.probe		= adt7475_probe,
1412 	.remove		= adt7475_remove,
1413 	.id_table	= adt7475_id,
1414 	.detect		= adt7475_detect,
1415 	.address_list	= normal_i2c,
1416 };
1417 
1418 static void adt7475_read_hystersis(struct i2c_client *client)
1419 {
1420 	struct adt7475_data *data = i2c_get_clientdata(client);
1421 
1422 	data->temp[HYSTERSIS][0] = (u16) adt7475_read(REG_REMOTE1_HYSTERSIS);
1423 	data->temp[HYSTERSIS][1] = data->temp[HYSTERSIS][0];
1424 	data->temp[HYSTERSIS][2] = (u16) adt7475_read(REG_REMOTE2_HYSTERSIS);
1425 }
1426 
1427 static void adt7475_read_pwm(struct i2c_client *client, int index)
1428 {
1429 	struct adt7475_data *data = i2c_get_clientdata(client);
1430 	unsigned int v;
1431 
1432 	data->pwm[CONTROL][index] = adt7475_read(PWM_CONFIG_REG(index));
1433 
1434 	/* Figure out the internal value for pwmctrl and pwmchan
1435 	   based on the current settings */
1436 	v = (data->pwm[CONTROL][index] >> 5) & 7;
1437 
1438 	if (v == 3)
1439 		data->pwmctl[index] = 0;
1440 	else if (v == 7)
1441 		data->pwmctl[index] = 1;
1442 	else if (v == 4) {
1443 		/* The fan is disabled - we don't want to
1444 		   support that, so change to manual mode and
1445 		   set the duty cycle to 0 instead
1446 		*/
1447 		data->pwm[INPUT][index] = 0;
1448 		data->pwm[CONTROL][index] &= ~0xE0;
1449 		data->pwm[CONTROL][index] |= (7 << 5);
1450 
1451 		i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
1452 					  data->pwm[INPUT][index]);
1453 
1454 		i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
1455 					  data->pwm[CONTROL][index]);
1456 
1457 		data->pwmctl[index] = 1;
1458 	} else {
1459 		data->pwmctl[index] = 2;
1460 
1461 		switch (v) {
1462 		case 0:
1463 			data->pwmchan[index] = 1;
1464 			break;
1465 		case 1:
1466 			data->pwmchan[index] = 2;
1467 			break;
1468 		case 2:
1469 			data->pwmchan[index] = 4;
1470 			break;
1471 		case 5:
1472 			data->pwmchan[index] = 6;
1473 			break;
1474 		case 6:
1475 			data->pwmchan[index] = 7;
1476 			break;
1477 		}
1478 	}
1479 }
1480 
1481 static struct adt7475_data *adt7475_update_device(struct device *dev)
1482 {
1483 	struct i2c_client *client = to_i2c_client(dev);
1484 	struct adt7475_data *data = i2c_get_clientdata(client);
1485 	u16 ext;
1486 	int i;
1487 
1488 	mutex_lock(&data->lock);
1489 
1490 	/* Measurement values update every 2 seconds */
1491 	if (time_after(jiffies, data->measure_updated + HZ * 2) ||
1492 	    !data->valid) {
1493 		data->alarms = adt7475_read(REG_STATUS2) << 8;
1494 		data->alarms |= adt7475_read(REG_STATUS1);
1495 
1496 		ext = (adt7475_read(REG_EXTEND2) << 8) |
1497 			adt7475_read(REG_EXTEND1);
1498 		for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
1499 			if (!(data->has_voltage & (1 << i)))
1500 				continue;
1501 			data->voltage[INPUT][i] =
1502 				(adt7475_read(VOLTAGE_REG(i)) << 2) |
1503 				((ext >> (i * 2)) & 3);
1504 		}
1505 
1506 		for (i = 0; i < ADT7475_TEMP_COUNT; i++)
1507 			data->temp[INPUT][i] =
1508 				(adt7475_read(TEMP_REG(i)) << 2) |
1509 				((ext >> ((i + 5) * 2)) & 3);
1510 
1511 		if (data->has_voltage & (1 << 5)) {
1512 			data->alarms |= adt7475_read(REG_STATUS4) << 24;
1513 			ext = adt7475_read(REG_EXTEND3);
1514 			data->voltage[INPUT][5] = adt7475_read(REG_VTT) << 2 |
1515 				((ext >> 4) & 3);
1516 		}
1517 
1518 		for (i = 0; i < ADT7475_TACH_COUNT; i++) {
1519 			if (i == 3 && !data->has_fan4)
1520 				continue;
1521 			data->tach[INPUT][i] =
1522 				adt7475_read_word(client, TACH_REG(i));
1523 		}
1524 
1525 		/* Updated by hw when in auto mode */
1526 		for (i = 0; i < ADT7475_PWM_COUNT; i++) {
1527 			if (i == 1 && !data->has_pwm2)
1528 				continue;
1529 			data->pwm[INPUT][i] = adt7475_read(PWM_REG(i));
1530 		}
1531 
1532 		if (data->has_vid)
1533 			data->vid = adt7475_read(REG_VID) & 0x3f;
1534 
1535 		data->measure_updated = jiffies;
1536 	}
1537 
1538 	/* Limits and settings, should never change update every 60 seconds */
1539 	if (time_after(jiffies, data->limits_updated + HZ * 60) ||
1540 	    !data->valid) {
1541 		data->config4 = adt7475_read(REG_CONFIG4);
1542 		data->config5 = adt7475_read(REG_CONFIG5);
1543 
1544 		for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
1545 			if (!(data->has_voltage & (1 << i)))
1546 				continue;
1547 			/* Adjust values so they match the input precision */
1548 			data->voltage[MIN][i] =
1549 				adt7475_read(VOLTAGE_MIN_REG(i)) << 2;
1550 			data->voltage[MAX][i] =
1551 				adt7475_read(VOLTAGE_MAX_REG(i)) << 2;
1552 		}
1553 
1554 		if (data->has_voltage & (1 << 5)) {
1555 			data->voltage[MIN][5] = adt7475_read(REG_VTT_MIN) << 2;
1556 			data->voltage[MAX][5] = adt7475_read(REG_VTT_MAX) << 2;
1557 		}
1558 
1559 		for (i = 0; i < ADT7475_TEMP_COUNT; i++) {
1560 			/* Adjust values so they match the input precision */
1561 			data->temp[MIN][i] =
1562 				adt7475_read(TEMP_MIN_REG(i)) << 2;
1563 			data->temp[MAX][i] =
1564 				adt7475_read(TEMP_MAX_REG(i)) << 2;
1565 			data->temp[AUTOMIN][i] =
1566 				adt7475_read(TEMP_TMIN_REG(i)) << 2;
1567 			data->temp[THERM][i] =
1568 				adt7475_read(TEMP_THERM_REG(i)) << 2;
1569 			data->temp[OFFSET][i] =
1570 				adt7475_read(TEMP_OFFSET_REG(i));
1571 		}
1572 		adt7475_read_hystersis(client);
1573 
1574 		for (i = 0; i < ADT7475_TACH_COUNT; i++) {
1575 			if (i == 3 && !data->has_fan4)
1576 				continue;
1577 			data->tach[MIN][i] =
1578 				adt7475_read_word(client, TACH_MIN_REG(i));
1579 		}
1580 
1581 		for (i = 0; i < ADT7475_PWM_COUNT; i++) {
1582 			if (i == 1 && !data->has_pwm2)
1583 				continue;
1584 			data->pwm[MAX][i] = adt7475_read(PWM_MAX_REG(i));
1585 			data->pwm[MIN][i] = adt7475_read(PWM_MIN_REG(i));
1586 			/* Set the channel and control information */
1587 			adt7475_read_pwm(client, i);
1588 		}
1589 
1590 		data->range[0] = adt7475_read(TEMP_TRANGE_REG(0));
1591 		data->range[1] = adt7475_read(TEMP_TRANGE_REG(1));
1592 		data->range[2] = adt7475_read(TEMP_TRANGE_REG(2));
1593 
1594 		data->limits_updated = jiffies;
1595 		data->valid = 1;
1596 	}
1597 
1598 	mutex_unlock(&data->lock);
1599 
1600 	return data;
1601 }
1602 
1603 static int __init sensors_adt7475_init(void)
1604 {
1605 	return i2c_add_driver(&adt7475_driver);
1606 }
1607 
1608 static void __exit sensors_adt7475_exit(void)
1609 {
1610 	i2c_del_driver(&adt7475_driver);
1611 }
1612 
1613 MODULE_AUTHOR("Advanced Micro Devices, Inc");
1614 MODULE_DESCRIPTION("adt7475 driver");
1615 MODULE_LICENSE("GPL");
1616 
1617 module_init(sensors_adt7475_init);
1618 module_exit(sensors_adt7475_exit);
1619