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.lk@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 0 > intrusion0_alarm'
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>
52 #include <linux/mutex.h>
53 #include <linux/jiffies.h>
55 /* Addresses to scan */
56 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
59 enum chips { adm9240, ds1780, lm81 };
61 /* ADM9240 registers */
62 #define ADM9240_REG_MAN_ID 0x3e
63 #define ADM9240_REG_DIE_REV 0x3f
64 #define ADM9240_REG_CONFIG 0x40
66 #define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */
67 #define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2)
68 #define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2)
69 #define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */
70 #define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr))
71 #define ADM9240_REG_INT(nr) (0x41 + (nr))
72 #define ADM9240_REG_INT_MASK(nr) (0x43 + (nr))
73 #define ADM9240_REG_TEMP 0x27
74 #define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */
75 #define ADM9240_REG_ANALOG_OUT 0x19
76 #define ADM9240_REG_CHASSIS_CLEAR 0x46
77 #define ADM9240_REG_VID_FAN_DIV 0x47
78 #define ADM9240_REG_I2C_ADDR 0x48
79 #define ADM9240_REG_VID4 0x49
80 #define ADM9240_REG_TEMP_CONF 0x4b
82 /* generalised scaling with integer rounding */
83 static inline int SCALE(long val, int mul, int div)
86 return (val * mul - div / 2) / div;
88 return (val * mul + div / 2) / div;
91 /* adm9240 internally scales voltage measurements */
92 static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 };
94 static inline unsigned int IN_FROM_REG(u8 reg, int n)
96 return SCALE(reg, nom_mv[n], 192);
99 static inline u8 IN_TO_REG(unsigned long val, int n)
101 val = clamp_val(val, 0, nom_mv[n] * 255 / 192);
102 return SCALE(val, 192, nom_mv[n]);
105 /* temperature range: -40..125, 127 disables temperature alarm */
106 static inline s8 TEMP_TO_REG(long val)
108 val = clamp_val(val, -40000, 127000);
109 return SCALE(val, 1, 1000);
112 /* two fans, each with low fan speed limit */
113 static inline unsigned int FAN_FROM_REG(u8 reg, u8 div)
115 if (!reg) /* error */
121 return SCALE(1350000, 1, reg * div);
124 /* analog out 0..1250mV */
125 static inline u8 AOUT_TO_REG(unsigned long val)
127 val = clamp_val(val, 0, 1250);
128 return SCALE(val, 255, 1250);
131 static inline unsigned int AOUT_FROM_REG(u8 reg)
133 return SCALE(reg, 1250, 255);
136 /* per client data */
137 struct adm9240_data {
138 struct i2c_client *client;
139 struct mutex update_lock;
141 unsigned long last_updated_measure;
142 unsigned long last_updated_config;
144 u8 in[6]; /* ro in0_input */
145 u8 in_max[6]; /* rw in0_max */
146 u8 in_min[6]; /* rw in0_min */
147 u8 fan[2]; /* ro fan1_input */
148 u8 fan_min[2]; /* rw fan1_min */
149 u8 fan_div[2]; /* rw fan1_div, read-only accessor */
150 s16 temp; /* ro temp1_input, 9-bit sign-extended */
151 s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */
152 u16 alarms; /* ro alarms */
153 u8 aout; /* rw aout_output */
155 u8 vrm; /* -- vrm set on startup, no accessor */
158 /* write new fan div, callers must hold data->update_lock */
159 static void adm9240_write_fan_div(struct i2c_client *client, int nr,
162 u8 reg, old, shift = (nr + 2) * 2;
164 reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
165 old = (reg >> shift) & 3;
166 reg &= ~(3 << shift);
167 reg |= (fan_div << shift);
168 i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg);
169 dev_dbg(&client->dev,
170 "fan%d clock divider changed from %u to %u\n",
171 nr + 1, 1 << old, 1 << fan_div);
174 static struct adm9240_data *adm9240_update_device(struct device *dev)
176 struct adm9240_data *data = dev_get_drvdata(dev);
177 struct i2c_client *client = data->client;
180 mutex_lock(&data->update_lock);
182 /* minimum measurement cycle: 1.75 seconds */
183 if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4))
186 for (i = 0; i < 6; i++) { /* read voltages */
187 data->in[i] = i2c_smbus_read_byte_data(client,
190 data->alarms = i2c_smbus_read_byte_data(client,
191 ADM9240_REG_INT(0)) |
192 i2c_smbus_read_byte_data(client,
193 ADM9240_REG_INT(1)) << 8;
196 * read temperature: assume temperature changes less than
197 * 0.5'C per two measurement cycles thus ignore possible
198 * but unlikely aliasing error on lsb reading. --Grant
200 data->temp = (i2c_smbus_read_byte_data(client,
201 ADM9240_REG_TEMP) << 8) |
202 i2c_smbus_read_byte_data(client,
203 ADM9240_REG_TEMP_CONF);
205 for (i = 0; i < 2; i++) { /* read fans */
206 data->fan[i] = i2c_smbus_read_byte_data(client,
209 /* adjust fan clock divider on overflow */
210 if (data->valid && data->fan[i] == 255 &&
211 data->fan_div[i] < 3) {
213 adm9240_write_fan_div(client, i,
216 /* adjust fan_min if active, but not to 0 */
217 if (data->fan_min[i] < 255 &&
218 data->fan_min[i] >= 2)
219 data->fan_min[i] /= 2;
222 data->last_updated_measure = jiffies;
225 /* minimum config reading cycle: 300 seconds */
226 if (time_after(jiffies, data->last_updated_config + (HZ * 300))
229 for (i = 0; i < 6; i++) {
230 data->in_min[i] = i2c_smbus_read_byte_data(client,
231 ADM9240_REG_IN_MIN(i));
232 data->in_max[i] = i2c_smbus_read_byte_data(client,
233 ADM9240_REG_IN_MAX(i));
235 for (i = 0; i < 2; i++) {
236 data->fan_min[i] = i2c_smbus_read_byte_data(client,
237 ADM9240_REG_FAN_MIN(i));
239 data->temp_max[0] = i2c_smbus_read_byte_data(client,
240 ADM9240_REG_TEMP_MAX(0));
241 data->temp_max[1] = i2c_smbus_read_byte_data(client,
242 ADM9240_REG_TEMP_MAX(1));
244 /* read fan divs and 5-bit VID */
245 i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
246 data->fan_div[0] = (i >> 4) & 3;
247 data->fan_div[1] = (i >> 6) & 3;
248 data->vid = i & 0x0f;
249 data->vid |= (i2c_smbus_read_byte_data(client,
250 ADM9240_REG_VID4) & 1) << 4;
251 /* read analog out */
252 data->aout = i2c_smbus_read_byte_data(client,
253 ADM9240_REG_ANALOG_OUT);
255 data->last_updated_config = jiffies;
258 mutex_unlock(&data->update_lock);
262 /*** sysfs accessors ***/
265 static ssize_t temp1_input_show(struct device *dev,
266 struct device_attribute *dummy, char *buf)
268 struct adm9240_data *data = adm9240_update_device(dev);
269 return sprintf(buf, "%d\n", data->temp / 128 * 500); /* 9-bit value */
272 static ssize_t max_show(struct device *dev, struct device_attribute *devattr,
275 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
276 struct adm9240_data *data = adm9240_update_device(dev);
277 return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000);
280 static ssize_t max_store(struct device *dev, struct device_attribute *devattr,
281 const char *buf, size_t count)
283 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
284 struct adm9240_data *data = dev_get_drvdata(dev);
285 struct i2c_client *client = data->client;
289 err = kstrtol(buf, 10, &val);
293 mutex_lock(&data->update_lock);
294 data->temp_max[attr->index] = TEMP_TO_REG(val);
295 i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index),
296 data->temp_max[attr->index]);
297 mutex_unlock(&data->update_lock);
301 static DEVICE_ATTR_RO(temp1_input);
302 static SENSOR_DEVICE_ATTR_RW(temp1_max, max, 0);
303 static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, max, 1);
306 static ssize_t in_show(struct device *dev, struct device_attribute *devattr,
309 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
310 struct adm9240_data *data = adm9240_update_device(dev);
311 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index],
315 static ssize_t in_min_show(struct device *dev,
316 struct device_attribute *devattr, char *buf)
318 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
319 struct adm9240_data *data = adm9240_update_device(dev);
320 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index],
324 static ssize_t in_max_show(struct device *dev,
325 struct device_attribute *devattr, char *buf)
327 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
328 struct adm9240_data *data = adm9240_update_device(dev);
329 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index],
333 static ssize_t in_min_store(struct device *dev,
334 struct device_attribute *devattr, const char *buf,
337 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
338 struct adm9240_data *data = dev_get_drvdata(dev);
339 struct i2c_client *client = data->client;
343 err = kstrtoul(buf, 10, &val);
347 mutex_lock(&data->update_lock);
348 data->in_min[attr->index] = IN_TO_REG(val, attr->index);
349 i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index),
350 data->in_min[attr->index]);
351 mutex_unlock(&data->update_lock);
355 static ssize_t in_max_store(struct device *dev,
356 struct device_attribute *devattr, const char *buf,
359 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
360 struct adm9240_data *data = dev_get_drvdata(dev);
361 struct i2c_client *client = data->client;
365 err = kstrtoul(buf, 10, &val);
369 mutex_lock(&data->update_lock);
370 data->in_max[attr->index] = IN_TO_REG(val, attr->index);
371 i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index),
372 data->in_max[attr->index]);
373 mutex_unlock(&data->update_lock);
377 static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
378 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
379 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
380 static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
381 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
382 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
383 static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
384 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
385 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
386 static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
387 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
388 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
389 static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
390 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
391 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
392 static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5);
393 static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5);
394 static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5);
397 static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
400 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
401 struct adm9240_data *data = adm9240_update_device(dev);
402 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index],
403 1 << data->fan_div[attr->index]));
406 static ssize_t fan_min_show(struct device *dev,
407 struct device_attribute *devattr, char *buf)
409 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
410 struct adm9240_data *data = adm9240_update_device(dev);
411 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index],
412 1 << data->fan_div[attr->index]));
415 static ssize_t fan_div_show(struct device *dev,
416 struct device_attribute *devattr, char *buf)
418 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
419 struct adm9240_data *data = adm9240_update_device(dev);
420 return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]);
424 * set fan speed low limit:
426 * - value is zero: disable fan speed low limit alarm
428 * - value is below fan speed measurement range: enable fan speed low
429 * limit alarm to be asserted while fan speed too slow to measure
431 * - otherwise: select fan clock divider to suit fan speed low limit,
432 * measurement code may adjust registers to ensure fan speed reading
434 static ssize_t fan_min_store(struct device *dev,
435 struct device_attribute *devattr,
436 const char *buf, size_t count)
438 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
439 struct adm9240_data *data = dev_get_drvdata(dev);
440 struct i2c_client *client = data->client;
441 int nr = attr->index;
446 err = kstrtoul(buf, 10, &val);
450 mutex_lock(&data->update_lock);
453 data->fan_min[nr] = 255;
454 new_div = data->fan_div[nr];
456 dev_dbg(&client->dev, "fan%u low limit set disabled\n",
459 } else if (val < 1350000 / (8 * 254)) {
461 data->fan_min[nr] = 254;
463 dev_dbg(&client->dev, "fan%u low limit set minimum %u\n",
464 nr + 1, FAN_FROM_REG(254, 1 << new_div));
467 unsigned int new_min = 1350000 / val;
470 while (new_min > 192 && new_div < 3) {
474 if (!new_min) /* keep > 0 */
477 data->fan_min[nr] = new_min;
479 dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n",
480 nr + 1, FAN_FROM_REG(new_min, 1 << new_div));
483 if (new_div != data->fan_div[nr]) {
484 data->fan_div[nr] = new_div;
485 adm9240_write_fan_div(client, nr, new_div);
487 i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr),
490 mutex_unlock(&data->update_lock);
494 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
495 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
496 static SENSOR_DEVICE_ATTR_RO(fan1_div, fan_div, 0);
497 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
498 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
499 static SENSOR_DEVICE_ATTR_RO(fan2_div, fan_div, 1);
502 static ssize_t alarms_show(struct device *dev,
503 struct device_attribute *attr, char *buf)
505 struct adm9240_data *data = adm9240_update_device(dev);
506 return sprintf(buf, "%u\n", data->alarms);
508 static DEVICE_ATTR_RO(alarms);
510 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
513 int bitnr = to_sensor_dev_attr(attr)->index;
514 struct adm9240_data *data = adm9240_update_device(dev);
515 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
517 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
518 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
519 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
520 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
521 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8);
522 static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 9);
523 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
524 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
525 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
528 static ssize_t cpu0_vid_show(struct device *dev,
529 struct device_attribute *attr, char *buf)
531 struct adm9240_data *data = adm9240_update_device(dev);
532 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
534 static DEVICE_ATTR_RO(cpu0_vid);
537 static ssize_t aout_output_show(struct device *dev,
538 struct device_attribute *attr, char *buf)
540 struct adm9240_data *data = adm9240_update_device(dev);
541 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
544 static ssize_t aout_output_store(struct device *dev,
545 struct device_attribute *attr,
546 const char *buf, size_t count)
548 struct adm9240_data *data = dev_get_drvdata(dev);
549 struct i2c_client *client = data->client;
553 err = kstrtol(buf, 10, &val);
557 mutex_lock(&data->update_lock);
558 data->aout = AOUT_TO_REG(val);
559 i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout);
560 mutex_unlock(&data->update_lock);
563 static DEVICE_ATTR_RW(aout_output);
565 static ssize_t alarm_store(struct device *dev, struct device_attribute *attr,
566 const char *buf, size_t count)
568 struct adm9240_data *data = dev_get_drvdata(dev);
569 struct i2c_client *client = data->client;
572 if (kstrtoul(buf, 10, &val) || val != 0)
575 mutex_lock(&data->update_lock);
576 i2c_smbus_write_byte_data(client, ADM9240_REG_CHASSIS_CLEAR, 0x80);
577 data->valid = 0; /* Force cache refresh */
578 mutex_unlock(&data->update_lock);
579 dev_dbg(&client->dev, "chassis intrusion latch cleared\n");
583 static SENSOR_DEVICE_ATTR_RW(intrusion0_alarm, alarm, 12);
585 static struct attribute *adm9240_attrs[] = {
586 &sensor_dev_attr_in0_input.dev_attr.attr,
587 &sensor_dev_attr_in0_min.dev_attr.attr,
588 &sensor_dev_attr_in0_max.dev_attr.attr,
589 &sensor_dev_attr_in0_alarm.dev_attr.attr,
590 &sensor_dev_attr_in1_input.dev_attr.attr,
591 &sensor_dev_attr_in1_min.dev_attr.attr,
592 &sensor_dev_attr_in1_max.dev_attr.attr,
593 &sensor_dev_attr_in1_alarm.dev_attr.attr,
594 &sensor_dev_attr_in2_input.dev_attr.attr,
595 &sensor_dev_attr_in2_min.dev_attr.attr,
596 &sensor_dev_attr_in2_max.dev_attr.attr,
597 &sensor_dev_attr_in2_alarm.dev_attr.attr,
598 &sensor_dev_attr_in3_input.dev_attr.attr,
599 &sensor_dev_attr_in3_min.dev_attr.attr,
600 &sensor_dev_attr_in3_max.dev_attr.attr,
601 &sensor_dev_attr_in3_alarm.dev_attr.attr,
602 &sensor_dev_attr_in4_input.dev_attr.attr,
603 &sensor_dev_attr_in4_min.dev_attr.attr,
604 &sensor_dev_attr_in4_max.dev_attr.attr,
605 &sensor_dev_attr_in4_alarm.dev_attr.attr,
606 &sensor_dev_attr_in5_input.dev_attr.attr,
607 &sensor_dev_attr_in5_min.dev_attr.attr,
608 &sensor_dev_attr_in5_max.dev_attr.attr,
609 &sensor_dev_attr_in5_alarm.dev_attr.attr,
610 &dev_attr_temp1_input.attr,
611 &sensor_dev_attr_temp1_max.dev_attr.attr,
612 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
613 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
614 &sensor_dev_attr_fan1_input.dev_attr.attr,
615 &sensor_dev_attr_fan1_div.dev_attr.attr,
616 &sensor_dev_attr_fan1_min.dev_attr.attr,
617 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
618 &sensor_dev_attr_fan2_input.dev_attr.attr,
619 &sensor_dev_attr_fan2_div.dev_attr.attr,
620 &sensor_dev_attr_fan2_min.dev_attr.attr,
621 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
622 &dev_attr_alarms.attr,
623 &dev_attr_aout_output.attr,
624 &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
625 &dev_attr_cpu0_vid.attr,
629 ATTRIBUTE_GROUPS(adm9240);
631 /*** sensor chip detect and driver install ***/
633 /* Return 0 if detection is successful, -ENODEV otherwise */
634 static int adm9240_detect(struct i2c_client *new_client,
635 struct i2c_board_info *info)
637 struct i2c_adapter *adapter = new_client->adapter;
638 const char *name = "";
639 int address = new_client->addr;
642 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
645 /* verify chip: reg address should match i2c address */
646 if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR)
648 dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n",
653 /* check known chip manufacturer */
654 man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID);
655 if (man_id == 0x23) {
657 } else if (man_id == 0xda) {
659 } else if (man_id == 0x01) {
662 dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n",
667 /* successful detect, print chip info */
668 die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV);
669 dev_info(&adapter->dev, "found %s revision %u\n",
670 man_id == 0x23 ? "ADM9240" :
671 man_id == 0xda ? "DS1780" : "LM81", die_rev);
673 strlcpy(info->type, name, I2C_NAME_SIZE);
678 static void adm9240_init_client(struct i2c_client *client)
680 struct adm9240_data *data = i2c_get_clientdata(client);
681 u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG);
682 u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3;
684 data->vrm = vid_which_vrm(); /* need this to report vid as mV */
686 dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10,
689 if (conf & 1) { /* measurement cycle running: report state */
691 dev_info(&client->dev, "status: config 0x%02x mode %u\n",
694 } else { /* cold start: open limits before starting chip */
697 for (i = 0; i < 6; i++) {
698 i2c_smbus_write_byte_data(client,
699 ADM9240_REG_IN_MIN(i), 0);
700 i2c_smbus_write_byte_data(client,
701 ADM9240_REG_IN_MAX(i), 255);
703 i2c_smbus_write_byte_data(client,
704 ADM9240_REG_FAN_MIN(0), 255);
705 i2c_smbus_write_byte_data(client,
706 ADM9240_REG_FAN_MIN(1), 255);
707 i2c_smbus_write_byte_data(client,
708 ADM9240_REG_TEMP_MAX(0), 127);
709 i2c_smbus_write_byte_data(client,
710 ADM9240_REG_TEMP_MAX(1), 127);
712 /* start measurement cycle */
713 i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1);
715 dev_info(&client->dev,
716 "cold start: config was 0x%02x mode %u\n", conf, mode);
720 static int adm9240_probe(struct i2c_client *new_client,
721 const struct i2c_device_id *id)
723 struct device *dev = &new_client->dev;
724 struct device *hwmon_dev;
725 struct adm9240_data *data;
727 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
731 i2c_set_clientdata(new_client, data);
732 data->client = new_client;
733 mutex_init(&data->update_lock);
735 adm9240_init_client(new_client);
737 hwmon_dev = devm_hwmon_device_register_with_groups(dev,
741 return PTR_ERR_OR_ZERO(hwmon_dev);
744 static const struct i2c_device_id adm9240_id[] = {
745 { "adm9240", adm9240 },
746 { "ds1780", ds1780 },
750 MODULE_DEVICE_TABLE(i2c, adm9240_id);
752 static struct i2c_driver adm9240_driver = {
753 .class = I2C_CLASS_HWMON,
757 .probe = adm9240_probe,
758 .id_table = adm9240_id,
759 .detect = adm9240_detect,
760 .address_list = normal_i2c,
763 module_i2c_driver(adm9240_driver);
765 MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, "
766 "Grant Coady <gcoady.lk@gmail.com> and others");
767 MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver");
768 MODULE_LICENSE("GPL");