2 * w83l786ng.c - Linux kernel driver for hardware monitoring
3 * Copyright (c) 2007 Kevin Lo <kevlo@kevlo.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation - version 2.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * Supports following chips:
23 * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
24 * w83l786ng 3 2 2 2 0x7b 0x5ca3 yes no
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <linux/i2c.h>
31 #include <linux/hwmon.h>
32 #include <linux/hwmon-vid.h>
33 #include <linux/hwmon-sysfs.h>
34 #include <linux/err.h>
35 #include <linux/mutex.h>
36 #include <linux/jiffies.h>
38 /* Addresses to scan */
39 static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END };
41 /* Insmod parameters */
44 module_param(reset, bool, 0);
45 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
47 #define W83L786NG_REG_IN_MIN(nr) (0x2C + (nr) * 2)
48 #define W83L786NG_REG_IN_MAX(nr) (0x2B + (nr) * 2)
49 #define W83L786NG_REG_IN(nr) ((nr) + 0x20)
51 #define W83L786NG_REG_FAN(nr) ((nr) + 0x28)
52 #define W83L786NG_REG_FAN_MIN(nr) ((nr) + 0x3B)
54 #define W83L786NG_REG_CONFIG 0x40
55 #define W83L786NG_REG_ALARM1 0x41
56 #define W83L786NG_REG_ALARM2 0x42
57 #define W83L786NG_REG_GPIO_EN 0x47
58 #define W83L786NG_REG_MAN_ID2 0x4C
59 #define W83L786NG_REG_MAN_ID1 0x4D
60 #define W83L786NG_REG_CHIP_ID 0x4E
62 #define W83L786NG_REG_DIODE 0x53
63 #define W83L786NG_REG_FAN_DIV 0x54
64 #define W83L786NG_REG_FAN_CFG 0x80
66 #define W83L786NG_REG_TOLERANCE 0x8D
68 static const u8 W83L786NG_REG_TEMP[2][3] = {
69 { 0x25, /* TEMP 0 in DataSheet */
70 0x35, /* TEMP 0 Over in DataSheet */
71 0x36 }, /* TEMP 0 Hyst in DataSheet */
72 { 0x26, /* TEMP 1 in DataSheet */
73 0x37, /* TEMP 1 Over in DataSheet */
74 0x38 } /* TEMP 1 Hyst in DataSheet */
77 static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7};
78 static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4};
80 /* FAN Duty Cycle, be used to control */
81 static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87};
85 FAN_TO_REG(long rpm, int div)
89 rpm = clamp_val(rpm, 1, 1000000);
90 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
93 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \
95 1350000 / ((val) * (div))))
98 #define TEMP_TO_REG(val) (clamp_val(((val) < 0 ? (val) + 0x100 * 1000 \
99 : (val)) / 1000, 0, 0xff))
100 #define TEMP_FROM_REG(val) (((val) & 0x80 ? \
101 (val) - 0x100 : (val)) * 1000)
104 * The analog voltage inputs have 8mV LSB. Since the sysfs output is
105 * in mV as would be measured on the chip input pin, need to just
106 * multiply/divide by 8 to translate from/to register values.
108 #define IN_TO_REG(val) (clamp_val((((val) + 4) / 8), 0, 255))
109 #define IN_FROM_REG(val) ((val) * 8)
111 #define DIV_FROM_REG(val) (1 << (val))
117 val = clamp_val(val, 1, 128) >> 1;
118 for (i = 0; i < 7; i++) {
126 struct w83l786ng_data {
127 struct i2c_client *client;
128 struct mutex update_lock;
129 char valid; /* !=0 if following fields are valid */
130 unsigned long last_updated; /* In jiffies */
131 unsigned long last_nonvolatile; /* In jiffies, last time we update the
132 * nonvolatile registers */
143 u8 pwm_mode[2]; /* 0->DC variable voltage
144 * 1->PWM variable duty cycle */
146 u8 pwm_enable[2]; /* 1->manual
147 * 2->thermal cruise (also called SmartFan I) */
152 w83l786ng_read_value(struct i2c_client *client, u8 reg)
154 return i2c_smbus_read_byte_data(client, reg);
158 w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value)
160 return i2c_smbus_write_byte_data(client, reg, value);
163 static struct w83l786ng_data *w83l786ng_update_device(struct device *dev)
165 struct w83l786ng_data *data = dev_get_drvdata(dev);
166 struct i2c_client *client = data->client;
170 mutex_lock(&data->update_lock);
171 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
173 dev_dbg(&client->dev, "Updating w83l786ng data.\n");
175 /* Update the voltages measured value and limits */
176 for (i = 0; i < 3; i++) {
177 data->in[i] = w83l786ng_read_value(client,
178 W83L786NG_REG_IN(i));
179 data->in_min[i] = w83l786ng_read_value(client,
180 W83L786NG_REG_IN_MIN(i));
181 data->in_max[i] = w83l786ng_read_value(client,
182 W83L786NG_REG_IN_MAX(i));
185 /* Update the fan counts and limits */
186 for (i = 0; i < 2; i++) {
187 data->fan[i] = w83l786ng_read_value(client,
188 W83L786NG_REG_FAN(i));
189 data->fan_min[i] = w83l786ng_read_value(client,
190 W83L786NG_REG_FAN_MIN(i));
193 /* Update the fan divisor */
194 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
195 data->fan_div[0] = reg_tmp & 0x07;
196 data->fan_div[1] = (reg_tmp >> 4) & 0x07;
198 pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
199 for (i = 0; i < 2; i++) {
201 ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1)
203 data->pwm_enable[i] =
204 ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 3) + 1;
206 (w83l786ng_read_value(client, W83L786NG_REG_PWM[i])
211 /* Update the temperature sensors */
212 for (i = 0; i < 2; i++) {
213 for (j = 0; j < 3; j++) {
214 data->temp[i][j] = w83l786ng_read_value(client,
215 W83L786NG_REG_TEMP[i][j]);
219 /* Update Smart Fan I/II tolerance */
220 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE);
221 data->tolerance[0] = reg_tmp & 0x0f;
222 data->tolerance[1] = (reg_tmp >> 4) & 0x0f;
224 data->last_updated = jiffies;
229 mutex_unlock(&data->update_lock);
234 /* following are the sysfs callback functions */
235 #define show_in_reg(reg) \
237 show_##reg(struct device *dev, struct device_attribute *attr, \
240 int nr = to_sensor_dev_attr(attr)->index; \
241 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
242 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
249 #define store_in_reg(REG, reg) \
251 store_in_##reg(struct device *dev, struct device_attribute *attr, \
252 const char *buf, size_t count) \
254 int nr = to_sensor_dev_attr(attr)->index; \
255 struct w83l786ng_data *data = dev_get_drvdata(dev); \
256 struct i2c_client *client = data->client; \
258 int err = kstrtoul(buf, 10, &val); \
261 mutex_lock(&data->update_lock); \
262 data->in_##reg[nr] = IN_TO_REG(val); \
263 w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \
264 data->in_##reg[nr]); \
265 mutex_unlock(&data->update_lock); \
269 store_in_reg(MIN, min)
270 store_in_reg(MAX, max)
272 static struct sensor_device_attribute sda_in_input[] = {
273 SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0),
274 SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1),
275 SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2),
278 static struct sensor_device_attribute sda_in_min[] = {
279 SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0),
280 SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1),
281 SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2),
284 static struct sensor_device_attribute sda_in_max[] = {
285 SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0),
286 SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1),
287 SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2),
290 #define show_fan_reg(reg) \
291 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
294 int nr = to_sensor_dev_attr(attr)->index; \
295 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
296 return sprintf(buf, "%d\n", \
297 FAN_FROM_REG(data->reg[nr], DIV_FROM_REG(data->fan_div[nr]))); \
301 show_fan_reg(fan_min);
304 store_fan_min(struct device *dev, struct device_attribute *attr,
305 const char *buf, size_t count)
307 int nr = to_sensor_dev_attr(attr)->index;
308 struct w83l786ng_data *data = dev_get_drvdata(dev);
309 struct i2c_client *client = data->client;
313 err = kstrtoul(buf, 10, &val);
317 mutex_lock(&data->update_lock);
318 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
319 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
321 mutex_unlock(&data->update_lock);
327 show_fan_div(struct device *dev, struct device_attribute *attr,
330 int nr = to_sensor_dev_attr(attr)->index;
331 struct w83l786ng_data *data = w83l786ng_update_device(dev);
332 return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr]));
336 * Note: we save and restore the fan minimum here, because its value is
337 * determined in part by the fan divisor. This follows the principle of
338 * least surprise; the user doesn't expect the fan minimum to change just
339 * because the divisor changed.
342 store_fan_div(struct device *dev, struct device_attribute *attr,
343 const char *buf, size_t count)
345 int nr = to_sensor_dev_attr(attr)->index;
346 struct w83l786ng_data *data = dev_get_drvdata(dev);
347 struct i2c_client *client = data->client;
358 err = kstrtoul(buf, 10, &val);
363 mutex_lock(&data->update_lock);
364 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
366 data->fan_div[nr] = DIV_TO_REG(val);
379 fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV)
382 tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask;
384 w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV,
385 fan_div_reg | tmp_fan_div);
387 /* Restore fan_min */
388 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
389 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
391 mutex_unlock(&data->update_lock);
396 static struct sensor_device_attribute sda_fan_input[] = {
397 SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0),
398 SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1),
401 static struct sensor_device_attribute sda_fan_min[] = {
402 SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
404 SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
408 static struct sensor_device_attribute sda_fan_div[] = {
409 SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div,
411 SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div,
416 /* read/write the temperature, includes measured value and limits */
419 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
421 struct sensor_device_attribute_2 *sensor_attr =
422 to_sensor_dev_attr_2(attr);
423 int nr = sensor_attr->nr;
424 int index = sensor_attr->index;
425 struct w83l786ng_data *data = w83l786ng_update_device(dev);
426 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
430 store_temp(struct device *dev, struct device_attribute *attr,
431 const char *buf, size_t count)
433 struct sensor_device_attribute_2 *sensor_attr =
434 to_sensor_dev_attr_2(attr);
435 int nr = sensor_attr->nr;
436 int index = sensor_attr->index;
437 struct w83l786ng_data *data = dev_get_drvdata(dev);
438 struct i2c_client *client = data->client;
442 err = kstrtol(buf, 10, &val);
446 mutex_lock(&data->update_lock);
447 data->temp[nr][index] = TEMP_TO_REG(val);
448 w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index],
449 data->temp[nr][index]);
450 mutex_unlock(&data->update_lock);
455 static struct sensor_device_attribute_2 sda_temp_input[] = {
456 SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0),
457 SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0),
460 static struct sensor_device_attribute_2 sda_temp_max[] = {
461 SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR,
462 show_temp, store_temp, 0, 1),
463 SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR,
464 show_temp, store_temp, 1, 1),
467 static struct sensor_device_attribute_2 sda_temp_max_hyst[] = {
468 SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR,
469 show_temp, store_temp, 0, 2),
470 SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR,
471 show_temp, store_temp, 1, 2),
474 #define show_pwm_reg(reg) \
475 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
478 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
479 int nr = to_sensor_dev_attr(attr)->index; \
480 return sprintf(buf, "%d\n", data->reg[nr]); \
483 show_pwm_reg(pwm_mode)
484 show_pwm_reg(pwm_enable)
488 store_pwm_mode(struct device *dev, struct device_attribute *attr,
489 const char *buf, size_t count)
491 int nr = to_sensor_dev_attr(attr)->index;
492 struct w83l786ng_data *data = dev_get_drvdata(dev);
493 struct i2c_client *client = data->client;
498 err = kstrtoul(buf, 10, &val);
504 mutex_lock(&data->update_lock);
505 data->pwm_mode[nr] = val;
506 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
507 reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]);
509 reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr];
510 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
511 mutex_unlock(&data->update_lock);
516 store_pwm(struct device *dev, struct device_attribute *attr,
517 const char *buf, size_t count)
519 int nr = to_sensor_dev_attr(attr)->index;
520 struct w83l786ng_data *data = dev_get_drvdata(dev);
521 struct i2c_client *client = data->client;
525 err = kstrtoul(buf, 10, &val);
528 val = clamp_val(val, 0, 255);
529 val = DIV_ROUND_CLOSEST(val, 0x11);
531 mutex_lock(&data->update_lock);
532 data->pwm[nr] = val * 0x11;
533 val |= w83l786ng_read_value(client, W83L786NG_REG_PWM[nr]) & 0xf0;
534 w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val);
535 mutex_unlock(&data->update_lock);
540 store_pwm_enable(struct device *dev, struct device_attribute *attr,
541 const char *buf, size_t count)
543 int nr = to_sensor_dev_attr(attr)->index;
544 struct w83l786ng_data *data = dev_get_drvdata(dev);
545 struct i2c_client *client = data->client;
550 err = kstrtoul(buf, 10, &val);
554 if (!val || val > 2) /* only modes 1 and 2 are supported */
557 mutex_lock(&data->update_lock);
558 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
559 data->pwm_enable[nr] = val;
560 reg &= ~(0x03 << W83L786NG_PWM_ENABLE_SHIFT[nr]);
561 reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr];
562 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
563 mutex_unlock(&data->update_lock);
567 static struct sensor_device_attribute sda_pwm[] = {
568 SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0),
569 SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1),
572 static struct sensor_device_attribute sda_pwm_mode[] = {
573 SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
575 SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
579 static struct sensor_device_attribute sda_pwm_enable[] = {
580 SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
581 store_pwm_enable, 0),
582 SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
583 store_pwm_enable, 1),
586 /* For Smart Fan I/Thermal Cruise and Smart Fan II */
588 show_tolerance(struct device *dev, struct device_attribute *attr, char *buf)
590 int nr = to_sensor_dev_attr(attr)->index;
591 struct w83l786ng_data *data = w83l786ng_update_device(dev);
592 return sprintf(buf, "%ld\n", (long)data->tolerance[nr]);
596 store_tolerance(struct device *dev, struct device_attribute *attr,
597 const char *buf, size_t count)
599 int nr = to_sensor_dev_attr(attr)->index;
600 struct w83l786ng_data *data = dev_get_drvdata(dev);
601 struct i2c_client *client = data->client;
602 u8 tol_tmp, tol_mask;
606 err = kstrtoul(buf, 10, &val);
610 mutex_lock(&data->update_lock);
611 tol_mask = w83l786ng_read_value(client,
612 W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0);
613 tol_tmp = clamp_val(val, 0, 15);
615 data->tolerance[nr] = tol_tmp;
619 w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE,
621 mutex_unlock(&data->update_lock);
625 static struct sensor_device_attribute sda_tolerance[] = {
626 SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO,
627 show_tolerance, store_tolerance, 0),
628 SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO,
629 show_tolerance, store_tolerance, 1),
633 #define IN_UNIT_ATTRS(X) \
634 &sda_in_input[X].dev_attr.attr, \
635 &sda_in_min[X].dev_attr.attr, \
636 &sda_in_max[X].dev_attr.attr
638 #define FAN_UNIT_ATTRS(X) \
639 &sda_fan_input[X].dev_attr.attr, \
640 &sda_fan_min[X].dev_attr.attr, \
641 &sda_fan_div[X].dev_attr.attr
643 #define TEMP_UNIT_ATTRS(X) \
644 &sda_temp_input[X].dev_attr.attr, \
645 &sda_temp_max[X].dev_attr.attr, \
646 &sda_temp_max_hyst[X].dev_attr.attr
648 #define PWM_UNIT_ATTRS(X) \
649 &sda_pwm[X].dev_attr.attr, \
650 &sda_pwm_mode[X].dev_attr.attr, \
651 &sda_pwm_enable[X].dev_attr.attr
653 #define TOLERANCE_UNIT_ATTRS(X) \
654 &sda_tolerance[X].dev_attr.attr
656 static struct attribute *w83l786ng_attrs[] = {
666 TOLERANCE_UNIT_ATTRS(0),
667 TOLERANCE_UNIT_ATTRS(1),
671 ATTRIBUTE_GROUPS(w83l786ng);
674 w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info)
676 struct i2c_adapter *adapter = client->adapter;
680 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
684 if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) {
685 dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n",
691 man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) +
692 w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2);
693 chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID);
695 if (man_id != 0x5CA3 || /* Winbond */
696 chip_id != 0x80) { /* W83L786NG */
697 dev_dbg(&adapter->dev,
698 "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n",
703 strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE);
708 static void w83l786ng_init_client(struct i2c_client *client)
713 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80);
715 /* Start monitoring */
716 tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG);
718 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01);
722 w83l786ng_probe(struct i2c_client *client, const struct i2c_device_id *id)
724 struct device *dev = &client->dev;
725 struct w83l786ng_data *data;
726 struct device *hwmon_dev;
730 data = devm_kzalloc(dev, sizeof(struct w83l786ng_data), GFP_KERNEL);
734 data->client = client;
735 mutex_init(&data->update_lock);
737 /* Initialize the chip */
738 w83l786ng_init_client(client);
740 /* A few vars need to be filled upon startup */
741 for (i = 0; i < 2; i++) {
742 data->fan_min[i] = w83l786ng_read_value(client,
743 W83L786NG_REG_FAN_MIN(i));
746 /* Update the fan divisor */
747 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
748 data->fan_div[0] = reg_tmp & 0x07;
749 data->fan_div[1] = (reg_tmp >> 4) & 0x07;
751 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
754 return PTR_ERR_OR_ZERO(hwmon_dev);
757 static const struct i2c_device_id w83l786ng_id[] = {
761 MODULE_DEVICE_TABLE(i2c, w83l786ng_id);
763 static struct i2c_driver w83l786ng_driver = {
764 .class = I2C_CLASS_HWMON,
768 .probe = w83l786ng_probe,
769 .id_table = w83l786ng_id,
770 .detect = w83l786ng_detect,
771 .address_list = normal_i2c,
774 module_i2c_driver(w83l786ng_driver);
776 MODULE_AUTHOR("Kevin Lo");
777 MODULE_DESCRIPTION("w83l786ng driver");
778 MODULE_LICENSE("GPL");