2 * adm9240.c Part of lm_sensors, Linux kernel modules for hardware
5 * Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl>
6 * Philip Edelbrock <phil@netroedge.com>
7 * Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl>
8 * Copyright (C) 2005 Grant Coady <gcoady@gmail.com> with valuable
9 * guidance from Jean Delvare
11 * Driver supports Analog Devices ADM9240
12 * Dallas Semiconductor DS1780
13 * National Semiconductor LM81
15 * ADM9240 is the reference, DS1780 and LM81 are register compatibles
17 * Voltage Six inputs are scaled by chip, VID also reported
18 * Temperature Chip temperature to 0.5'C, maximum and max_hysteris
19 * Fans 2 fans, low speed alarm, automatic fan clock divider
20 * Alarms 16-bit map of active alarms
21 * Analog Out 0..1250 mV output
23 * Chassis Intrusion: clear CI latch with 'echo 1 > chassis_clear'
25 * Test hardware: Intel SE440BX-2 desktop motherboard --Grant
27 * LM81 extended temp reading not implemented
29 * This program is free software; you can redistribute it and/or modify
30 * it under the terms of the GNU General Public License as published by
31 * the Free Software Foundation; either version 2 of the License, or
32 * (at your option) any later version.
34 * This program is distributed in the hope that it will be useful,
35 * but WITHOUT ANY WARRANTY; without even the implied warranty of
36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
37 * GNU General Public License for more details.
39 * You should have received a copy of the GNU General Public License
40 * along with this program; if not, write to the Free Software
41 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
44 #include <linux/init.h>
45 #include <linux/module.h>
46 #include <linux/slab.h>
47 #include <linux/i2c.h>
48 #include <linux/hwmon-sysfs.h>
49 #include <linux/hwmon.h>
50 #include <linux/hwmon-vid.h>
51 #include <linux/err.h>
53 /* Addresses to scan */
54 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
57 /* Insmod parameters */
58 I2C_CLIENT_INSMOD_3(adm9240, ds1780, lm81);
60 /* ADM9240 registers */
61 #define ADM9240_REG_MAN_ID 0x3e
62 #define ADM9240_REG_DIE_REV 0x3f
63 #define ADM9240_REG_CONFIG 0x40
65 #define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */
66 #define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2)
67 #define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2)
68 #define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */
69 #define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr))
70 #define ADM9240_REG_INT(nr) (0x41 + (nr))
71 #define ADM9240_REG_INT_MASK(nr) (0x43 + (nr))
72 #define ADM9240_REG_TEMP 0x27
73 #define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */
74 #define ADM9240_REG_ANALOG_OUT 0x19
75 #define ADM9240_REG_CHASSIS_CLEAR 0x46
76 #define ADM9240_REG_VID_FAN_DIV 0x47
77 #define ADM9240_REG_I2C_ADDR 0x48
78 #define ADM9240_REG_VID4 0x49
79 #define ADM9240_REG_TEMP_CONF 0x4b
81 /* generalised scaling with integer rounding */
82 static inline int SCALE(long val, int mul, int div)
85 return (val * mul - div / 2) / div;
87 return (val * mul + div / 2) / div;
90 /* adm9240 internally scales voltage measurements */
91 static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 };
93 static inline unsigned int IN_FROM_REG(u8 reg, int n)
95 return SCALE(reg, nom_mv[n], 192);
98 static inline u8 IN_TO_REG(unsigned long val, int n)
100 return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255);
103 /* temperature range: -40..125, 127 disables temperature alarm */
104 static inline s8 TEMP_TO_REG(long val)
106 return SENSORS_LIMIT(SCALE(val, 1, 1000), -40, 127);
109 /* two fans, each with low fan speed limit */
110 static inline unsigned int FAN_FROM_REG(u8 reg, u8 div)
112 if (!reg) /* error */
118 return SCALE(1350000, 1, reg * div);
121 /* analog out 0..1250mV */
122 static inline u8 AOUT_TO_REG(unsigned long val)
124 return SENSORS_LIMIT(SCALE(val, 255, 1250), 0, 255);
127 static inline unsigned int AOUT_FROM_REG(u8 reg)
129 return SCALE(reg, 1250, 255);
132 static int adm9240_attach_adapter(struct i2c_adapter *adapter);
133 static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind);
134 static void adm9240_init_client(struct i2c_client *client);
135 static int adm9240_detach_client(struct i2c_client *client);
136 static struct adm9240_data *adm9240_update_device(struct device *dev);
139 static struct i2c_driver adm9240_driver = {
140 .owner = THIS_MODULE,
142 .id = I2C_DRIVERID_ADM9240,
143 .attach_adapter = adm9240_attach_adapter,
144 .detach_client = adm9240_detach_client,
147 /* per client data */
148 struct adm9240_data {
150 struct i2c_client client;
151 struct class_device *class_dev;
152 struct semaphore update_lock;
154 unsigned long last_updated_measure;
155 unsigned long last_updated_config;
157 u8 in[6]; /* ro in0_input */
158 u8 in_max[6]; /* rw in0_max */
159 u8 in_min[6]; /* rw in0_min */
160 u8 fan[2]; /* ro fan1_input */
161 u8 fan_min[2]; /* rw fan1_min */
162 u8 fan_div[2]; /* rw fan1_div, read-only accessor */
163 s16 temp; /* ro temp1_input, 9-bit sign-extended */
164 s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */
165 u16 alarms; /* ro alarms */
166 u8 aout; /* rw aout_output */
168 u8 vrm; /* -- vrm set on startup, no accessor */
171 /*** sysfs accessors ***/
174 static ssize_t show_temp(struct device *dev, struct device_attribute *dummy,
177 struct adm9240_data *data = adm9240_update_device(dev);
178 return sprintf(buf, "%d\n", data->temp * 500); /* 9-bit value */
181 static ssize_t show_max(struct device *dev, struct device_attribute *devattr,
184 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
185 struct adm9240_data *data = adm9240_update_device(dev);
186 return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000);
189 static ssize_t set_max(struct device *dev, struct device_attribute *devattr,
190 const char *buf, size_t count)
192 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
193 struct i2c_client *client = to_i2c_client(dev);
194 struct adm9240_data *data = i2c_get_clientdata(client);
195 long val = simple_strtol(buf, NULL, 10);
197 down(&data->update_lock);
198 data->temp_max[attr->index] = TEMP_TO_REG(val);
199 i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index),
200 data->temp_max[attr->index]);
201 up(&data->update_lock);
205 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
206 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
207 show_max, set_max, 0);
208 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
209 show_max, set_max, 1);
212 static ssize_t show_in(struct device *dev, struct device_attribute *devattr,
215 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
216 struct adm9240_data *data = adm9240_update_device(dev);
217 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index],
221 static ssize_t show_in_min(struct device *dev,
222 struct device_attribute *devattr, char *buf)
224 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
225 struct adm9240_data *data = adm9240_update_device(dev);
226 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index],
230 static ssize_t show_in_max(struct device *dev,
231 struct device_attribute *devattr, char *buf)
233 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
234 struct adm9240_data *data = adm9240_update_device(dev);
235 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index],
239 static ssize_t set_in_min(struct device *dev,
240 struct device_attribute *devattr,
241 const char *buf, size_t count)
243 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
244 struct i2c_client *client = to_i2c_client(dev);
245 struct adm9240_data *data = i2c_get_clientdata(client);
246 unsigned long val = simple_strtoul(buf, NULL, 10);
248 down(&data->update_lock);
249 data->in_min[attr->index] = IN_TO_REG(val, attr->index);
250 i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index),
251 data->in_min[attr->index]);
252 up(&data->update_lock);
256 static ssize_t set_in_max(struct device *dev,
257 struct device_attribute *devattr,
258 const char *buf, size_t count)
260 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
261 struct i2c_client *client = to_i2c_client(dev);
262 struct adm9240_data *data = i2c_get_clientdata(client);
263 unsigned long val = simple_strtoul(buf, NULL, 10);
265 down(&data->update_lock);
266 data->in_max[attr->index] = IN_TO_REG(val, attr->index);
267 i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index),
268 data->in_max[attr->index]);
269 up(&data->update_lock);
274 static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, \
275 show_in, NULL, nr); \
276 static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR, \
277 show_in_min, set_in_min, nr); \
278 static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR, \
279 show_in_max, set_in_max, nr);
289 static ssize_t show_fan(struct device *dev,
290 struct device_attribute *devattr, char *buf)
292 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
293 struct adm9240_data *data = adm9240_update_device(dev);
294 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index],
295 1 << data->fan_div[attr->index]));
298 static ssize_t show_fan_min(struct device *dev,
299 struct device_attribute *devattr, char *buf)
301 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
302 struct adm9240_data *data = adm9240_update_device(dev);
303 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index],
304 1 << data->fan_div[attr->index]));
307 static ssize_t show_fan_div(struct device *dev,
308 struct device_attribute *devattr, char *buf)
310 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
311 struct adm9240_data *data = adm9240_update_device(dev);
312 return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]);
315 /* write new fan div, callers must hold data->update_lock */
316 static void adm9240_write_fan_div(struct i2c_client *client, int nr,
319 u8 reg, old, shift = (nr + 2) * 2;
321 reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
322 old = (reg >> shift) & 3;
323 reg &= ~(3 << shift);
324 reg |= (fan_div << shift);
325 i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg);
326 dev_dbg(&client->dev, "fan%d clock divider changed from %u "
327 "to %u\n", nr + 1, 1 << old, 1 << fan_div);
331 * set fan speed low limit:
333 * - value is zero: disable fan speed low limit alarm
335 * - value is below fan speed measurement range: enable fan speed low
336 * limit alarm to be asserted while fan speed too slow to measure
338 * - otherwise: select fan clock divider to suit fan speed low limit,
339 * measurement code may adjust registers to ensure fan speed reading
341 static ssize_t set_fan_min(struct device *dev,
342 struct device_attribute *devattr,
343 const char *buf, size_t count)
345 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
346 struct i2c_client *client = to_i2c_client(dev);
347 struct adm9240_data *data = i2c_get_clientdata(client);
348 unsigned long val = simple_strtoul(buf, NULL, 10);
349 int nr = attr->index;
352 down(&data->update_lock);
355 data->fan_min[nr] = 255;
356 new_div = data->fan_div[nr];
358 dev_dbg(&client->dev, "fan%u low limit set disabled\n",
361 } else if (val < 1350000 / (8 * 254)) {
363 data->fan_min[nr] = 254;
365 dev_dbg(&client->dev, "fan%u low limit set minimum %u\n",
366 nr + 1, FAN_FROM_REG(254, 1 << new_div));
369 unsigned int new_min = 1350000 / val;
372 while (new_min > 192 && new_div < 3) {
376 if (!new_min) /* keep > 0 */
379 data->fan_min[nr] = new_min;
381 dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n",
382 nr + 1, FAN_FROM_REG(new_min, 1 << new_div));
385 if (new_div != data->fan_div[nr]) {
386 data->fan_div[nr] = new_div;
387 adm9240_write_fan_div(client, nr, new_div);
389 i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr),
392 up(&data->update_lock);
397 static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO, \
398 show_fan, NULL, nr - 1); \
399 static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO, \
400 show_fan_div, NULL, nr - 1); \
401 static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR, \
402 show_fan_min, set_fan_min, nr - 1);
408 static ssize_t show_alarms(struct device *dev,
409 struct device_attribute *attr, char *buf)
411 struct adm9240_data *data = adm9240_update_device(dev);
412 return sprintf(buf, "%u\n", data->alarms);
414 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
417 static ssize_t show_vid(struct device *dev,
418 struct device_attribute *attr, char *buf)
420 struct adm9240_data *data = adm9240_update_device(dev);
421 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
423 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
426 static ssize_t show_aout(struct device *dev,
427 struct device_attribute *attr, char *buf)
429 struct adm9240_data *data = adm9240_update_device(dev);
430 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
433 static ssize_t set_aout(struct device *dev,
434 struct device_attribute *attr,
435 const char *buf, size_t count)
437 struct i2c_client *client = to_i2c_client(dev);
438 struct adm9240_data *data = i2c_get_clientdata(client);
439 unsigned long val = simple_strtol(buf, NULL, 10);
441 down(&data->update_lock);
442 data->aout = AOUT_TO_REG(val);
443 i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout);
444 up(&data->update_lock);
447 static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
450 static ssize_t chassis_clear(struct device *dev,
451 struct device_attribute *attr,
452 const char *buf, size_t count)
454 struct i2c_client *client = to_i2c_client(dev);
455 unsigned long val = simple_strtol(buf, NULL, 10);
458 i2c_smbus_write_byte_data(client,
459 ADM9240_REG_CHASSIS_CLEAR, 0x80);
460 dev_dbg(&client->dev, "chassis intrusion latch cleared\n");
464 static DEVICE_ATTR(chassis_clear, S_IWUSR, NULL, chassis_clear);
467 /*** sensor chip detect and driver install ***/
469 static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind)
471 struct i2c_client *new_client;
472 struct adm9240_data *data;
474 const char *name = "";
477 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
480 if (!(data = kzalloc(sizeof(*data), GFP_KERNEL))) {
485 new_client = &data->client;
486 i2c_set_clientdata(new_client, data);
487 new_client->addr = address;
488 new_client->adapter = adapter;
489 new_client->driver = &adm9240_driver;
490 new_client->flags = 0;
498 /* verify chip: reg address should match i2c address */
499 if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR)
501 dev_err(&adapter->dev, "detect fail: address match, "
502 "0x%02x\n", address);
506 /* check known chip manufacturer */
507 man_id = i2c_smbus_read_byte_data(new_client,
509 if (man_id == 0x23) {
511 } else if (man_id == 0xda) {
513 } else if (man_id == 0x01) {
516 dev_err(&adapter->dev, "detect fail: unknown manuf, "
521 /* successful detect, print chip info */
522 die_rev = i2c_smbus_read_byte_data(new_client,
523 ADM9240_REG_DIE_REV);
524 dev_info(&adapter->dev, "found %s revision %u\n",
525 man_id == 0x23 ? "ADM9240" :
526 man_id == 0xda ? "DS1780" : "LM81", die_rev);
529 /* either forced or detected chip kind */
530 if (kind == adm9240) {
532 } else if (kind == ds1780) {
534 } else if (kind == lm81) {
538 /* fill in the remaining client fields and attach */
539 strlcpy(new_client->name, name, I2C_NAME_SIZE);
541 init_MUTEX(&data->update_lock);
543 if ((err = i2c_attach_client(new_client)))
546 adm9240_init_client(new_client);
548 /* populate sysfs filesystem */
549 data->class_dev = hwmon_device_register(&new_client->dev);
550 if (IS_ERR(data->class_dev)) {
551 err = PTR_ERR(data->class_dev);
555 device_create_file(&new_client->dev,
556 &sensor_dev_attr_in0_input.dev_attr);
557 device_create_file(&new_client->dev,
558 &sensor_dev_attr_in0_min.dev_attr);
559 device_create_file(&new_client->dev,
560 &sensor_dev_attr_in0_max.dev_attr);
561 device_create_file(&new_client->dev,
562 &sensor_dev_attr_in1_input.dev_attr);
563 device_create_file(&new_client->dev,
564 &sensor_dev_attr_in1_min.dev_attr);
565 device_create_file(&new_client->dev,
566 &sensor_dev_attr_in1_max.dev_attr);
567 device_create_file(&new_client->dev,
568 &sensor_dev_attr_in2_input.dev_attr);
569 device_create_file(&new_client->dev,
570 &sensor_dev_attr_in2_min.dev_attr);
571 device_create_file(&new_client->dev,
572 &sensor_dev_attr_in2_max.dev_attr);
573 device_create_file(&new_client->dev,
574 &sensor_dev_attr_in3_input.dev_attr);
575 device_create_file(&new_client->dev,
576 &sensor_dev_attr_in3_min.dev_attr);
577 device_create_file(&new_client->dev,
578 &sensor_dev_attr_in3_max.dev_attr);
579 device_create_file(&new_client->dev,
580 &sensor_dev_attr_in4_input.dev_attr);
581 device_create_file(&new_client->dev,
582 &sensor_dev_attr_in4_min.dev_attr);
583 device_create_file(&new_client->dev,
584 &sensor_dev_attr_in4_max.dev_attr);
585 device_create_file(&new_client->dev,
586 &sensor_dev_attr_in5_input.dev_attr);
587 device_create_file(&new_client->dev,
588 &sensor_dev_attr_in5_min.dev_attr);
589 device_create_file(&new_client->dev,
590 &sensor_dev_attr_in5_max.dev_attr);
591 device_create_file(&new_client->dev, &dev_attr_temp1_input);
592 device_create_file(&new_client->dev,
593 &sensor_dev_attr_temp1_max.dev_attr);
594 device_create_file(&new_client->dev,
595 &sensor_dev_attr_temp1_max_hyst.dev_attr);
596 device_create_file(&new_client->dev,
597 &sensor_dev_attr_fan1_input.dev_attr);
598 device_create_file(&new_client->dev,
599 &sensor_dev_attr_fan1_div.dev_attr);
600 device_create_file(&new_client->dev,
601 &sensor_dev_attr_fan1_min.dev_attr);
602 device_create_file(&new_client->dev,
603 &sensor_dev_attr_fan2_input.dev_attr);
604 device_create_file(&new_client->dev,
605 &sensor_dev_attr_fan2_div.dev_attr);
606 device_create_file(&new_client->dev,
607 &sensor_dev_attr_fan2_min.dev_attr);
608 device_create_file(&new_client->dev, &dev_attr_alarms);
609 device_create_file(&new_client->dev, &dev_attr_aout_output);
610 device_create_file(&new_client->dev, &dev_attr_chassis_clear);
611 device_create_file(&new_client->dev, &dev_attr_cpu0_vid);
616 i2c_detach_client(new_client);
623 static int adm9240_attach_adapter(struct i2c_adapter *adapter)
625 if (!(adapter->class & I2C_CLASS_HWMON))
627 return i2c_probe(adapter, &addr_data, adm9240_detect);
630 static int adm9240_detach_client(struct i2c_client *client)
632 struct adm9240_data *data = i2c_get_clientdata(client);
635 hwmon_device_unregister(data->class_dev);
637 if ((err = i2c_detach_client(client)))
644 static void adm9240_init_client(struct i2c_client *client)
646 struct adm9240_data *data = i2c_get_clientdata(client);
647 u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG);
648 u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3;
650 data->vrm = vid_which_vrm(); /* need this to report vid as mV */
652 dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10,
655 if (conf & 1) { /* measurement cycle running: report state */
657 dev_info(&client->dev, "status: config 0x%02x mode %u\n",
660 } else { /* cold start: open limits before starting chip */
663 for (i = 0; i < 6; i++)
665 i2c_smbus_write_byte_data(client,
666 ADM9240_REG_IN_MIN(i), 0);
667 i2c_smbus_write_byte_data(client,
668 ADM9240_REG_IN_MAX(i), 255);
670 i2c_smbus_write_byte_data(client,
671 ADM9240_REG_FAN_MIN(0), 255);
672 i2c_smbus_write_byte_data(client,
673 ADM9240_REG_FAN_MIN(1), 255);
674 i2c_smbus_write_byte_data(client,
675 ADM9240_REG_TEMP_MAX(0), 127);
676 i2c_smbus_write_byte_data(client,
677 ADM9240_REG_TEMP_MAX(1), 127);
679 /* start measurement cycle */
680 i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1);
682 dev_info(&client->dev, "cold start: config was 0x%02x "
683 "mode %u\n", conf, mode);
687 static struct adm9240_data *adm9240_update_device(struct device *dev)
689 struct i2c_client *client = to_i2c_client(dev);
690 struct adm9240_data *data = i2c_get_clientdata(client);
693 down(&data->update_lock);
695 /* minimum measurement cycle: 1.75 seconds */
696 if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4))
699 for (i = 0; i < 6; i++) /* read voltages */
701 data->in[i] = i2c_smbus_read_byte_data(client,
704 data->alarms = i2c_smbus_read_byte_data(client,
705 ADM9240_REG_INT(0)) |
706 i2c_smbus_read_byte_data(client,
707 ADM9240_REG_INT(1)) << 8;
709 /* read temperature: assume temperature changes less than
710 * 0.5'C per two measurement cycles thus ignore possible
711 * but unlikely aliasing error on lsb reading. --Grant */
712 data->temp = ((i2c_smbus_read_byte_data(client,
713 ADM9240_REG_TEMP) << 8) |
714 i2c_smbus_read_byte_data(client,
715 ADM9240_REG_TEMP_CONF)) / 128;
717 for (i = 0; i < 2; i++) /* read fans */
719 data->fan[i] = i2c_smbus_read_byte_data(client,
722 /* adjust fan clock divider on overflow */
723 if (data->valid && data->fan[i] == 255 &&
724 data->fan_div[i] < 3) {
726 adm9240_write_fan_div(client, i,
729 /* adjust fan_min if active, but not to 0 */
730 if (data->fan_min[i] < 255 &&
731 data->fan_min[i] >= 2)
732 data->fan_min[i] /= 2;
735 data->last_updated_measure = jiffies;
738 /* minimum config reading cycle: 300 seconds */
739 if (time_after(jiffies, data->last_updated_config + (HZ * 300))
742 for (i = 0; i < 6; i++)
744 data->in_min[i] = i2c_smbus_read_byte_data(client,
745 ADM9240_REG_IN_MIN(i));
746 data->in_max[i] = i2c_smbus_read_byte_data(client,
747 ADM9240_REG_IN_MAX(i));
749 for (i = 0; i < 2; i++)
751 data->fan_min[i] = i2c_smbus_read_byte_data(client,
752 ADM9240_REG_FAN_MIN(i));
754 data->temp_max[0] = i2c_smbus_read_byte_data(client,
755 ADM9240_REG_TEMP_MAX(0));
756 data->temp_max[1] = i2c_smbus_read_byte_data(client,
757 ADM9240_REG_TEMP_MAX(1));
759 /* read fan divs and 5-bit VID */
760 i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
761 data->fan_div[0] = (i >> 4) & 3;
762 data->fan_div[1] = (i >> 6) & 3;
763 data->vid = i & 0x0f;
764 data->vid |= (i2c_smbus_read_byte_data(client,
765 ADM9240_REG_VID4) & 1) << 4;
766 /* read analog out */
767 data->aout = i2c_smbus_read_byte_data(client,
768 ADM9240_REG_ANALOG_OUT);
770 data->last_updated_config = jiffies;
773 up(&data->update_lock);
777 static int __init sensors_adm9240_init(void)
779 return i2c_add_driver(&adm9240_driver);
782 static void __exit sensors_adm9240_exit(void)
784 i2c_del_driver(&adm9240_driver);
787 MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, "
788 "Grant Coady <gcoady@gmail.com> and others");
789 MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver");
790 MODULE_LICENSE("GPL");
792 module_init(sensors_adm9240_init);
793 module_exit(sensors_adm9240_exit);