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>
37 /* Addresses to scan */
38 static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END };
40 /* Insmod parameters */
41 I2C_CLIENT_INSMOD_1(w83l786ng);
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 = SENSORS_LIMIT(rpm, 1, 1000000);
90 return SENSORS_LIMIT((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) (SENSORS_LIMIT(((val) < 0 ? (val)+0x100*1000 \
99 : (val)) / 1000, 0, 0xff))
100 #define TEMP_FROM_REG(val) (((val) & 0x80 ? (val)-0x100 : (val)) * 1000)
102 /* The analog voltage inputs have 8mV LSB. Since the sysfs output is
103 in mV as would be measured on the chip input pin, need to just
104 multiply/divide by 8 to translate from/to register values. */
105 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 4) / 8), 0, 255))
106 #define IN_FROM_REG(val) ((val) * 8)
108 #define DIV_FROM_REG(val) (1 << (val))
114 val = SENSORS_LIMIT(val, 1, 128) >> 1;
115 for (i = 0; i < 7; i++) {
123 struct w83l786ng_data {
124 struct i2c_client client;
125 struct device *hwmon_dev;
126 struct mutex update_lock;
127 char valid; /* !=0 if following fields are valid */
128 unsigned long last_updated; /* In jiffies */
129 unsigned long last_nonvolatile; /* In jiffies, last time we update the
130 nonvolatile registers */
141 u8 pwm_mode[2]; /* 0->DC variable voltage
142 1->PWM variable duty cycle */
144 u8 pwm_enable[2]; /* 1->manual
145 2->thermal cruise (also called SmartFan I) */
149 static int w83l786ng_attach_adapter(struct i2c_adapter *adapter);
150 static int w83l786ng_detect(struct i2c_adapter *adapter, int address, int kind);
151 static int w83l786ng_detach_client(struct i2c_client *client);
152 static void w83l786ng_init_client(struct i2c_client *client);
153 static struct w83l786ng_data *w83l786ng_update_device(struct device *dev);
155 static struct i2c_driver w83l786ng_driver = {
159 .attach_adapter = w83l786ng_attach_adapter,
160 .detach_client = w83l786ng_detach_client,
164 w83l786ng_read_value(struct i2c_client *client, u8 reg)
166 return i2c_smbus_read_byte_data(client, reg);
170 w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value)
172 return i2c_smbus_write_byte_data(client, reg, value);
175 /* following are the sysfs callback functions */
176 #define show_in_reg(reg) \
178 show_##reg(struct device *dev, struct device_attribute *attr, \
181 int nr = to_sensor_dev_attr(attr)->index; \
182 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
183 return sprintf(buf,"%d\n", IN_FROM_REG(data->reg[nr])); \
190 #define store_in_reg(REG, reg) \
192 store_in_##reg (struct device *dev, struct device_attribute *attr, \
193 const char *buf, size_t count) \
195 int nr = to_sensor_dev_attr(attr)->index; \
196 struct i2c_client *client = to_i2c_client(dev); \
197 struct w83l786ng_data *data = i2c_get_clientdata(client); \
198 unsigned long val = simple_strtoul(buf, NULL, 10); \
199 mutex_lock(&data->update_lock); \
200 data->in_##reg[nr] = IN_TO_REG(val); \
201 w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \
202 data->in_##reg[nr]); \
203 mutex_unlock(&data->update_lock); \
207 store_in_reg(MIN, min)
208 store_in_reg(MAX, max)
210 static struct sensor_device_attribute sda_in_input[] = {
211 SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0),
212 SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1),
213 SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2),
216 static struct sensor_device_attribute sda_in_min[] = {
217 SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0),
218 SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1),
219 SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2),
222 static struct sensor_device_attribute sda_in_max[] = {
223 SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0),
224 SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1),
225 SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2),
228 #define show_fan_reg(reg) \
229 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
232 int nr = to_sensor_dev_attr(attr)->index; \
233 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
234 return sprintf(buf,"%d\n", \
235 FAN_FROM_REG(data->fan[nr], DIV_FROM_REG(data->fan_div[nr]))); \
239 show_fan_reg(fan_min);
242 store_fan_min(struct device *dev, struct device_attribute *attr,
243 const char *buf, size_t count)
245 int nr = to_sensor_dev_attr(attr)->index;
246 struct i2c_client *client = to_i2c_client(dev);
247 struct w83l786ng_data *data = i2c_get_clientdata(client);
250 val = simple_strtoul(buf, NULL, 10);
251 mutex_lock(&data->update_lock);
252 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
253 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
255 mutex_unlock(&data->update_lock);
261 show_fan_div(struct device *dev, struct device_attribute *attr,
264 int nr = to_sensor_dev_attr(attr)->index;
265 struct w83l786ng_data *data = w83l786ng_update_device(dev);
266 return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr]));
269 /* Note: we save and restore the fan minimum here, because its value is
270 determined in part by the fan divisor. This follows the principle of
271 least surprise; the user doesn't expect the fan minimum to change just
272 because the divisor changed. */
274 store_fan_div(struct device *dev, struct device_attribute *attr,
275 const char *buf, size_t count)
277 int nr = to_sensor_dev_attr(attr)->index;
278 struct i2c_client *client = to_i2c_client(dev);
279 struct w83l786ng_data *data = i2c_get_clientdata(client);
288 mutex_lock(&data->update_lock);
289 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
291 data->fan_div[nr] = DIV_TO_REG(simple_strtoul(buf, NULL, 10));
304 fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV)
307 tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask;
309 w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV,
310 fan_div_reg | tmp_fan_div);
312 /* Restore fan_min */
313 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
314 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
316 mutex_unlock(&data->update_lock);
321 static struct sensor_device_attribute sda_fan_input[] = {
322 SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0),
323 SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1),
326 static struct sensor_device_attribute sda_fan_min[] = {
327 SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
329 SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
333 static struct sensor_device_attribute sda_fan_div[] = {
334 SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div,
336 SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div,
341 /* read/write the temperature, includes measured value and limits */
344 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
346 struct sensor_device_attribute_2 *sensor_attr =
347 to_sensor_dev_attr_2(attr);
348 int nr = sensor_attr->nr;
349 int index = sensor_attr->index;
350 struct w83l786ng_data *data = w83l786ng_update_device(dev);
351 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
355 store_temp(struct device *dev, struct device_attribute *attr,
356 const char *buf, size_t count)
358 struct sensor_device_attribute_2 *sensor_attr =
359 to_sensor_dev_attr_2(attr);
360 int nr = sensor_attr->nr;
361 int index = sensor_attr->index;
362 struct i2c_client *client = to_i2c_client(dev);
363 struct w83l786ng_data *data = i2c_get_clientdata(client);
366 val = simple_strtol(buf, NULL, 10);
367 mutex_lock(&data->update_lock);
368 data->temp[nr][index] = TEMP_TO_REG(val);
369 w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index],
370 data->temp[nr][index]);
371 mutex_unlock(&data->update_lock);
376 static struct sensor_device_attribute_2 sda_temp_input[] = {
377 SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0),
378 SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0),
381 static struct sensor_device_attribute_2 sda_temp_max[] = {
382 SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR,
383 show_temp, store_temp, 0, 1),
384 SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR,
385 show_temp, store_temp, 1, 1),
388 static struct sensor_device_attribute_2 sda_temp_max_hyst[] = {
389 SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR,
390 show_temp, store_temp, 0, 2),
391 SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR,
392 show_temp, store_temp, 1, 2),
395 #define show_pwm_reg(reg) \
396 static ssize_t show_##reg (struct device *dev, struct device_attribute *attr, \
399 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
400 int nr = to_sensor_dev_attr(attr)->index; \
401 return sprintf(buf, "%d\n", data->reg[nr]); \
404 show_pwm_reg(pwm_mode)
405 show_pwm_reg(pwm_enable)
409 store_pwm_mode(struct device *dev, struct device_attribute *attr,
410 const char *buf, size_t count)
412 int nr = to_sensor_dev_attr(attr)->index;
413 struct i2c_client *client = to_i2c_client(dev);
414 struct w83l786ng_data *data = i2c_get_clientdata(client);
415 u32 val = simple_strtoul(buf, NULL, 10);
420 mutex_lock(&data->update_lock);
421 data->pwm_mode[nr] = val;
422 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
423 reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]);
425 reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr];
426 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
427 mutex_unlock(&data->update_lock);
432 store_pwm(struct device *dev, struct device_attribute *attr,
433 const char *buf, size_t count)
435 int nr = to_sensor_dev_attr(attr)->index;
436 struct i2c_client *client = to_i2c_client(dev);
437 struct w83l786ng_data *data = i2c_get_clientdata(client);
438 u32 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 0, 255);
440 mutex_lock(&data->update_lock);
442 w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val);
443 mutex_unlock(&data->update_lock);
448 store_pwm_enable(struct device *dev, struct device_attribute *attr,
449 const char *buf, size_t count)
451 int nr = to_sensor_dev_attr(attr)->index;
452 struct i2c_client *client = to_i2c_client(dev);
453 struct w83l786ng_data *data = i2c_get_clientdata(client);
454 u32 val = simple_strtoul(buf, NULL, 10);
458 if (!val || (val > 2)) /* only modes 1 and 2 are supported */
461 mutex_lock(&data->update_lock);
462 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
463 data->pwm_enable[nr] = val;
464 reg &= ~(0x02 << W83L786NG_PWM_ENABLE_SHIFT[nr]);
465 reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr];
466 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
467 mutex_unlock(&data->update_lock);
471 static struct sensor_device_attribute sda_pwm[] = {
472 SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0),
473 SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1),
476 static struct sensor_device_attribute sda_pwm_mode[] = {
477 SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
479 SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
483 static struct sensor_device_attribute sda_pwm_enable[] = {
484 SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
485 store_pwm_enable, 0),
486 SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
487 store_pwm_enable, 1),
490 /* For Smart Fan I/Thermal Cruise and Smart Fan II */
492 show_tolerance(struct device *dev, struct device_attribute *attr, char *buf)
494 int nr = to_sensor_dev_attr(attr)->index;
495 struct w83l786ng_data *data = w83l786ng_update_device(dev);
496 return sprintf(buf, "%ld\n", (long)data->tolerance[nr]);
500 store_tolerance(struct device *dev, struct device_attribute *attr,
501 const char *buf, size_t count)
503 int nr = to_sensor_dev_attr(attr)->index;
504 struct i2c_client *client = to_i2c_client(dev);
505 struct w83l786ng_data *data = i2c_get_clientdata(client);
507 u8 tol_tmp, tol_mask;
509 val = simple_strtoul(buf, NULL, 10);
511 mutex_lock(&data->update_lock);
512 tol_mask = w83l786ng_read_value(client,
513 W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0);
514 tol_tmp = SENSORS_LIMIT(val, 0, 15);
516 data->tolerance[nr] = tol_tmp;
521 w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE,
523 mutex_unlock(&data->update_lock);
527 static struct sensor_device_attribute sda_tolerance[] = {
528 SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO,
529 show_tolerance, store_tolerance, 0),
530 SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO,
531 show_tolerance, store_tolerance, 1),
535 #define IN_UNIT_ATTRS(X) \
536 &sda_in_input[X].dev_attr.attr, \
537 &sda_in_min[X].dev_attr.attr, \
538 &sda_in_max[X].dev_attr.attr
540 #define FAN_UNIT_ATTRS(X) \
541 &sda_fan_input[X].dev_attr.attr, \
542 &sda_fan_min[X].dev_attr.attr, \
543 &sda_fan_div[X].dev_attr.attr
545 #define TEMP_UNIT_ATTRS(X) \
546 &sda_temp_input[X].dev_attr.attr, \
547 &sda_temp_max[X].dev_attr.attr, \
548 &sda_temp_max_hyst[X].dev_attr.attr
550 #define PWM_UNIT_ATTRS(X) \
551 &sda_pwm[X].dev_attr.attr, \
552 &sda_pwm_mode[X].dev_attr.attr, \
553 &sda_pwm_enable[X].dev_attr.attr
555 #define TOLERANCE_UNIT_ATTRS(X) \
556 &sda_tolerance[X].dev_attr.attr
558 static struct attribute *w83l786ng_attributes[] = {
568 TOLERANCE_UNIT_ATTRS(0),
569 TOLERANCE_UNIT_ATTRS(1),
573 static const struct attribute_group w83l786ng_group = {
574 .attrs = w83l786ng_attributes,
578 w83l786ng_attach_adapter(struct i2c_adapter *adapter)
580 if (!(adapter->class & I2C_CLASS_HWMON))
582 return i2c_probe(adapter, &addr_data, w83l786ng_detect);
586 w83l786ng_detect(struct i2c_adapter *adapter, int address, int kind)
588 struct i2c_client *client;
590 struct w83l786ng_data *data;
594 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
598 /* OK. For now, we presume we have a valid client. We now create the
599 client structure, even though we cannot fill it completely yet.
600 But it allows us to access w83l786ng_{read,write}_value. */
602 if (!(data = kzalloc(sizeof(struct w83l786ng_data), GFP_KERNEL))) {
607 client = &data->client;
609 i2c_set_clientdata(client, data);
610 client->addr = address;
611 client->adapter = adapter;
612 client->driver = &w83l786ng_driver;
615 * Now we do the remaining detection. A negative kind means that
616 * the driver was loaded with no force parameter (default), so we
617 * must both detect and identify the chip (actually there is only
618 * one possible kind of chip for now, W83L786NG). A zero kind means
619 * that the driver was loaded with the force parameter, the detection
620 * step shall be skipped. A positive kind means that the driver
621 * was loaded with the force parameter and a given kind of chip is
622 * requested, so both the detection and the identification steps
625 if (kind < 0) { /* detection */
626 if (((w83l786ng_read_value(client,
627 W83L786NG_REG_CONFIG) & 0x80) != 0x00)) {
628 dev_dbg(&adapter->dev,
629 "W83L786NG detection failed at 0x%02x.\n",
635 if (kind <= 0) { /* identification */
639 man_id = (w83l786ng_read_value(client,
640 W83L786NG_REG_MAN_ID1) << 8) +
641 w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2);
642 chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID);
644 if (man_id == 0x5CA3) { /* Winbond */
645 if (chip_id == 0x80) { /* W83L786NG */
650 if (kind <= 0) { /* identification failed */
651 dev_info(&adapter->dev,
652 "Unsupported chip (man_id=0x%04X, "
653 "chip_id=0x%02X).\n", man_id, chip_id);
658 /* Fill in the remaining client fields and put into the global list */
659 strlcpy(client->name, "w83l786ng", I2C_NAME_SIZE);
660 mutex_init(&data->update_lock);
662 /* Tell the I2C layer a new client has arrived */
663 if ((err = i2c_attach_client(client)))
666 /* Initialize the chip */
667 w83l786ng_init_client(client);
669 /* A few vars need to be filled upon startup */
670 for (i = 0; i < 2; i++) {
671 data->fan_min[i] = w83l786ng_read_value(client,
672 W83L786NG_REG_FAN_MIN(i));
675 /* Update the fan divisor */
676 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
677 data->fan_div[0] = reg_tmp & 0x07;
678 data->fan_div[1] = (reg_tmp >> 4) & 0x07;
680 /* Register sysfs hooks */
681 if ((err = sysfs_create_group(&client->dev.kobj, &w83l786ng_group)))
684 data->hwmon_dev = hwmon_device_register(dev);
685 if (IS_ERR(data->hwmon_dev)) {
686 err = PTR_ERR(data->hwmon_dev);
692 /* Unregister sysfs hooks */
695 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group);
696 i2c_detach_client(client);
704 w83l786ng_detach_client(struct i2c_client *client)
706 struct w83l786ng_data *data = i2c_get_clientdata(client);
709 hwmon_device_unregister(data->hwmon_dev);
710 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group);
712 if ((err = i2c_detach_client(client)))
721 w83l786ng_init_client(struct i2c_client *client)
726 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80);
728 /* Start monitoring */
729 tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG);
731 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01);
734 static struct w83l786ng_data *w83l786ng_update_device(struct device *dev)
736 struct i2c_client *client = to_i2c_client(dev);
737 struct w83l786ng_data *data = i2c_get_clientdata(client);
741 mutex_lock(&data->update_lock);
742 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
744 dev_dbg(&client->dev, "Updating w83l786ng data.\n");
746 /* Update the voltages measured value and limits */
747 for (i = 0; i < 3; i++) {
748 data->in[i] = w83l786ng_read_value(client,
749 W83L786NG_REG_IN(i));
750 data->in_min[i] = w83l786ng_read_value(client,
751 W83L786NG_REG_IN_MIN(i));
752 data->in_max[i] = w83l786ng_read_value(client,
753 W83L786NG_REG_IN_MAX(i));
756 /* Update the fan counts and limits */
757 for (i = 0; i < 2; i++) {
758 data->fan[i] = w83l786ng_read_value(client,
759 W83L786NG_REG_FAN(i));
760 data->fan_min[i] = w83l786ng_read_value(client,
761 W83L786NG_REG_FAN_MIN(i));
764 /* Update the fan divisor */
765 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
766 data->fan_div[0] = reg_tmp & 0x07;
767 data->fan_div[1] = (reg_tmp >> 4) & 0x07;
769 pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
770 for (i = 0; i < 2; i++) {
772 ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1)
774 data->pwm_enable[i] =
775 ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 2) + 1;
776 data->pwm[i] = w83l786ng_read_value(client,
777 W83L786NG_REG_PWM[i]);
781 /* Update the temperature sensors */
782 for (i = 0; i < 2; i++) {
783 for (j = 0; j < 3; j++) {
784 data->temp[i][j] = w83l786ng_read_value(client,
785 W83L786NG_REG_TEMP[i][j]);
789 /* Update Smart Fan I/II tolerance */
790 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE);
791 data->tolerance[0] = reg_tmp & 0x0f;
792 data->tolerance[1] = (reg_tmp >> 4) & 0x0f;
794 data->last_updated = jiffies;
799 mutex_unlock(&data->update_lock);
805 sensors_w83l786ng_init(void)
807 return i2c_add_driver(&w83l786ng_driver);
811 sensors_w83l786ng_exit(void)
813 i2c_del_driver(&w83l786ng_driver);
816 MODULE_AUTHOR("Kevin Lo");
817 MODULE_DESCRIPTION("w83l786ng driver");
818 MODULE_LICENSE("GPL");
820 module_init(sensors_w83l786ng_init);
821 module_exit(sensors_w83l786ng_exit);