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[PATCH] i2c: Drop i2c_driver.{owner,name}, 2 of 11
[linux-2.6-block.git] / drivers / hwmon / adm9240.c
CommitLineData
40b5cda2
GC		 1/*
2 * adm9240.c Part of lm_sensors, Linux kernel modules for hardware
3 * monitoring
4 *
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
10 *
11 * Driver supports Analog Devices ADM9240
12 * Dallas Semiconductor DS1780
13 * National Semiconductor LM81
14 *
15 * ADM9240 is the reference, DS1780 and LM81 are register compatibles
16 *
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
22 *
23 * Chassis Intrusion: clear CI latch with 'echo 1 > chassis_clear'
24 *
25 * Test hardware: Intel SE440BX-2 desktop motherboard --Grant
26 *
27 * LM81 extended temp reading not implemented
28 *
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.
33 *
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.
38 *
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.
42 */
43
44#include <linux/init.h>
45#include <linux/module.h>
46#include <linux/slab.h>
47#include <linux/i2c.h>
c7461a66 48#include <linux/hwmon-sysfs.h>
943b0830 49#include <linux/hwmon.h>
303760b4 50#include <linux/hwmon-vid.h>
943b0830 51#include <linux/err.h>
40b5cda2
GC		 52
53/* Addresses to scan */
54static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
55 I2C_CLIENT_END };
56
40b5cda2 57/* Insmod parameters */
f4b50261 58I2C_CLIENT_INSMOD_3(adm9240, ds1780, lm81);
40b5cda2
GC		 59
60/* ADM9240 registers */
61#define ADM9240_REG_MAN_ID 0x3e
62#define ADM9240_REG_DIE_REV 0x3f
63#define ADM9240_REG_CONFIG 0x40
64
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
c7461a66 73#define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */
40b5cda2
GC		 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
80
81/* generalised scaling with integer rounding */
82static inline int SCALE(long val, int mul, int div)
83{
84 if (val < 0)
85 return (val * mul - div / 2) / div;
86 else
87 return (val * mul + div / 2) / div;
88}
89
90/* adm9240 internally scales voltage measurements */
91static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 };
92
93static inline unsigned int IN_FROM_REG(u8 reg, int n)
94{
95 return SCALE(reg, nom_mv[n], 192);
96}
97
98static inline u8 IN_TO_REG(unsigned long val, int n)
99{
100 return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255);
101}
102
103/* temperature range: -40..125, 127 disables temperature alarm */
104static inline s8 TEMP_TO_REG(long val)
105{
106 return SENSORS_LIMIT(SCALE(val, 1, 1000), -40, 127);
107}
108
109/* two fans, each with low fan speed limit */
110static inline unsigned int FAN_FROM_REG(u8 reg, u8 div)
111{
112 if (!reg) /* error */
113 return -1;
114
115 if (reg == 255)
116 return 0;
117
118 return SCALE(1350000, 1, reg * div);
119}
120
121/* analog out 0..1250mV */
122static inline u8 AOUT_TO_REG(unsigned long val)
123{
124 return SENSORS_LIMIT(SCALE(val, 255, 1250), 0, 255);
125}
126
127static inline unsigned int AOUT_FROM_REG(u8 reg)
128{
129 return SCALE(reg, 1250, 255);
130}
131
132static int adm9240_attach_adapter(struct i2c_adapter *adapter);
133static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind);
134static void adm9240_init_client(struct i2c_client *client);
135static int adm9240_detach_client(struct i2c_client *client);
136static struct adm9240_data *adm9240_update_device(struct device *dev);
137
138/* driver data */
139static struct i2c_driver adm9240_driver = {
140 .owner = THIS_MODULE,
141 .name = "adm9240",
142 .id = I2C_DRIVERID_ADM9240,
40b5cda2
GC		 143 .attach_adapter = adm9240_attach_adapter,
144 .detach_client = adm9240_detach_client,
145};
146
147/* per client data */
148struct adm9240_data {
149 enum chips type;
150 struct i2c_client client;
943b0830 151 struct class_device *class_dev;
40b5cda2
GC		 152 struct semaphore update_lock;
153 char valid;
154 unsigned long last_updated_measure;
155 unsigned long last_updated_config;
156
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 */
c7461a66 164 s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */
40b5cda2 165 u16 alarms; /* ro alarms */
8e8f9289 166 u8 aout; /* rw aout_output */
40b5cda2
GC		 167 u8 vid; /* ro vid */
168 u8 vrm; /* -- vrm set on startup, no accessor */
169};
170
40b5cda2
GC		 171/*** sysfs accessors ***/
172
173/* temperature */
c7461a66
GC		 174static ssize_t show_temp(struct device *dev, struct device_attribute *dummy,
175 char *buf)
176{
177 struct adm9240_data *data = adm9240_update_device(dev);
178 return sprintf(buf, "%d\n", data->temp * 500); /* 9-bit value */
179}
180
181static ssize_t show_max(struct device *dev, struct device_attribute *devattr,
182 char *buf)
183{
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);
187}
188
189static ssize_t set_max(struct device *dev, struct device_attribute *devattr,
190 const char *buf, size_t count)
191{
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);
196
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);
202 return count;
203}
204
40b5cda2 205static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
c7461a66
GC		 206static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
207 show_max, set_max, 0);
208static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
209 show_max, set_max, 1);
40b5cda2
GC		 210
211/* voltage */
c7461a66
GC		 212static ssize_t show_in(struct device *dev, struct device_attribute *devattr,
213 char *buf)
40b5cda2 214{
c7461a66 215 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 216 struct adm9240_data *data = adm9240_update_device(dev);
c7461a66
GC		 217 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index],
218 attr->index));
40b5cda2
GC		 219}
220
e415e48b
JD		 221static ssize_t show_in_min(struct device *dev,
222 struct device_attribute *devattr, char *buf)
40b5cda2 223{
c7461a66 224 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 225 struct adm9240_data *data = adm9240_update_device(dev);
c7461a66
GC		 226 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index],
227 attr->index));
40b5cda2
GC		 228}
229
e415e48b
JD		 230static ssize_t show_in_max(struct device *dev,
231 struct device_attribute *devattr, char *buf)
40b5cda2 232{
c7461a66 233 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 234 struct adm9240_data *data = adm9240_update_device(dev);
c7461a66
GC		 235 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index],
236 attr->index));
40b5cda2
GC		 237}
238
e415e48b
JD		 239static ssize_t set_in_min(struct device *dev,
240 struct device_attribute *devattr,
c7461a66 241 const char *buf, size_t count)
40b5cda2 242{
c7461a66 243 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2
GC		 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);
247
248 down(&data->update_lock);
c7461a66
GC		 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]);
40b5cda2
GC		 252 up(&data->update_lock);
253 return count;
254}
255
e415e48b
JD		 256static ssize_t set_in_max(struct device *dev,
257 struct device_attribute *devattr,
c7461a66 258 const char *buf, size_t count)
40b5cda2 259{
c7461a66 260 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2
GC		 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);
264
265 down(&data->update_lock);
c7461a66
GC		 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]);
40b5cda2
GC		 269 up(&data->update_lock);
270 return count;
271}
272
c7461a66
GC		 273#define vin(nr) \
274static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, \
275 show_in, NULL, nr); \
276static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR, \
277 show_in_min, set_in_min, nr); \
278static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR, \
279 show_in_max, set_in_max, nr);
280
281vin(0);
282vin(1);
283vin(2);
284vin(3);
285vin(4);
286vin(5);
40b5cda2
GC		 287
288/* fans */
c7461a66
GC		 289static ssize_t show_fan(struct device *dev,
290 struct device_attribute *devattr, char *buf)
40b5cda2 291{
c7461a66 292 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 293 struct adm9240_data *data = adm9240_update_device(dev);
c7461a66
GC		 294 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index],
295 1 << data->fan_div[attr->index]));
40b5cda2
GC		 296}
297
c7461a66
GC		 298static ssize_t show_fan_min(struct device *dev,
299 struct device_attribute *devattr, char *buf)
40b5cda2 300{
c7461a66 301 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 302 struct adm9240_data *data = adm9240_update_device(dev);
c7461a66
GC		 303 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index],
304 1 << data->fan_div[attr->index]));
40b5cda2
GC		 305}
306
c7461a66
GC		 307static ssize_t show_fan_div(struct device *dev,
308 struct device_attribute *devattr, char *buf)
40b5cda2 309{
c7461a66 310 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2 311 struct adm9240_data *data = adm9240_update_device(dev);
c7461a66 312 return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]);
40b5cda2
GC		 313}
314
315/* write new fan div, callers must hold data->update_lock */
316static void adm9240_write_fan_div(struct i2c_client *client, int nr,
317 u8 fan_div)
318{
319 u8 reg, old, shift = (nr + 2) * 2;
320
205cf13e 321 reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
40b5cda2
GC		 322 old = (reg >> shift) & 3;
323 reg &= ~(3 << shift);
324 reg |= (fan_div << shift);
205cf13e 325 i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg);
40b5cda2
GC		 326 dev_dbg(&client->dev, "fan%d clock divider changed from %u "
327 "to %u\n", nr + 1, 1 << old, 1 << fan_div);
328}
329
e415e48b 330/*
40b5cda2
GC		 331 * set fan speed low limit:
332 *
333 * - value is zero: disable fan speed low limit alarm
334 *
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
337 *
338 * - otherwise: select fan clock divider to suit fan speed low limit,
339 * measurement code may adjust registers to ensure fan speed reading
340 */
c7461a66
GC		 341static ssize_t set_fan_min(struct device *dev,
342 struct device_attribute *devattr,
343 const char *buf, size_t count)
40b5cda2 344{
c7461a66 345 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
40b5cda2
GC		 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);
c7461a66 349 int nr = attr->index;
40b5cda2
GC		 350 u8 new_div;
351
352 down(&data->update_lock);
353
354 if (!val) {
355 data->fan_min[nr] = 255;
356 new_div = data->fan_div[nr];
357
358 dev_dbg(&client->dev, "fan%u low limit set disabled\n",
359 nr + 1);
360
361 } else if (val < 1350000 / (8 * 254)) {
362 new_div = 3;
363 data->fan_min[nr] = 254;
364
365 dev_dbg(&client->dev, "fan%u low limit set minimum %u\n",
366 nr + 1, FAN_FROM_REG(254, 1 << new_div));
367
368 } else {
369 unsigned int new_min = 1350000 / val;
370
371 new_div = 0;
372 while (new_min > 192 && new_div < 3) {
373 new_div++;
374 new_min /= 2;
375 }
376 if (!new_min) /* keep > 0 */
377 new_min++;
378
379 data->fan_min[nr] = new_min;
380
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));
383 }
384
385 if (new_div != data->fan_div[nr]) {
386 data->fan_div[nr] = new_div;
387 adm9240_write_fan_div(client, nr, new_div);
388 }
205cf13e 389 i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr),
40b5cda2
GC		 390 data->fan_min[nr]);
391
392 up(&data->update_lock);
393 return count;
394}
395
c7461a66
GC		 396#define fan(nr) \
397static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO, \
398 show_fan, NULL, nr - 1); \
399static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO, \
400 show_fan_div, NULL, nr - 1); \
401static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR, \
402 show_fan_min, set_fan_min, nr - 1);
403
404fan(1);
405fan(2);
40b5cda2
GC		 406
407/* alarms */
e415e48b
JD		 408static ssize_t show_alarms(struct device *dev,
409 struct device_attribute *attr, char *buf)
40b5cda2
GC		 410{
411 struct adm9240_data *data = adm9240_update_device(dev);
412 return sprintf(buf, "%u\n", data->alarms);
413}
414static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
415
416/* vid */
e415e48b
JD		 417static ssize_t show_vid(struct device *dev,
418 struct device_attribute *attr, char *buf)
40b5cda2
GC		 419{
420 struct adm9240_data *data = adm9240_update_device(dev);
421 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
422}
423static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
424
425/* analog output */
e415e48b
JD		 426static ssize_t show_aout(struct device *dev,
427 struct device_attribute *attr, char *buf)
40b5cda2
GC		 428{
429 struct adm9240_data *data = adm9240_update_device(dev);
430 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
431}
432
e415e48b
JD		 433static ssize_t set_aout(struct device *dev,
434 struct device_attribute *attr,
435 const char *buf, size_t count)
40b5cda2
GC		 436{
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);
440
441 down(&data->update_lock);
442 data->aout = AOUT_TO_REG(val);
205cf13e 443 i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout);
40b5cda2
GC		 444 up(&data->update_lock);
445 return count;
446}
447static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
448
449/* chassis_clear */
e415e48b
JD		 450static ssize_t chassis_clear(struct device *dev,
451 struct device_attribute *attr,
452 const char *buf, size_t count)
40b5cda2
GC		 453{
454 struct i2c_client *client = to_i2c_client(dev);
455 unsigned long val = simple_strtol(buf, NULL, 10);
456
457 if (val == 1) {
205cf13e
GC		 458 i2c_smbus_write_byte_data(client,
459 ADM9240_REG_CHASSIS_CLEAR, 0x80);
40b5cda2
GC		 460 dev_dbg(&client->dev, "chassis intrusion latch cleared\n");
461 }
462 return count;
463}
464static DEVICE_ATTR(chassis_clear, S_IWUSR, NULL, chassis_clear);
465
466
467/*** sensor chip detect and driver install ***/
468
469static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind)
470{
471 struct i2c_client *new_client;
472 struct adm9240_data *data;
473 int err = 0;
474 const char *name = "";
475 u8 man_id, die_rev;
476
477 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
478 goto exit;
479
205cf13e 480 if (!(data = kzalloc(sizeof(*data), GFP_KERNEL))) {
40b5cda2
GC		 481 err = -ENOMEM;
482 goto exit;
483 }
40b5cda2
GC		 484
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;
491
492 if (kind == 0) {
493 kind = adm9240;
494 }
495
496 if (kind < 0) {
497
498 /* verify chip: reg address should match i2c address */
205cf13e 499 if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR)
40b5cda2
GC		 500 != address) {
501 dev_err(&adapter->dev, "detect fail: address match, "
502 "0x%02x\n", address);
503 goto exit_free;
504 }
505
506 /* check known chip manufacturer */
205cf13e
GC		 507 man_id = i2c_smbus_read_byte_data(new_client,
508 ADM9240_REG_MAN_ID);
40b5cda2
GC		 509 if (man_id == 0x23) {
510 kind = adm9240;
511 } else if (man_id == 0xda) {
512 kind = ds1780;
513 } else if (man_id == 0x01) {
514 kind = lm81;
515 } else {
516 dev_err(&adapter->dev, "detect fail: unknown manuf, "
517 "0x%02x\n", man_id);
518 goto exit_free;
519 }
520
521 /* successful detect, print chip info */
205cf13e
GC		 522 die_rev = i2c_smbus_read_byte_data(new_client,
523 ADM9240_REG_DIE_REV);
40b5cda2
GC		 524 dev_info(&adapter->dev, "found %s revision %u\n",
525 man_id == 0x23 ? "ADM9240" :
526 man_id == 0xda ? "DS1780" : "LM81", die_rev);
527 }
528
529 /* either forced or detected chip kind */
530 if (kind == adm9240) {
531 name = "adm9240";
532 } else if (kind == ds1780) {
533 name = "ds1780";
534 } else if (kind == lm81) {
535 name = "lm81";
536 }
537
538 /* fill in the remaining client fields and attach */
539 strlcpy(new_client->name, name, I2C_NAME_SIZE);
540 data->type = kind;
541 init_MUTEX(&data->update_lock);
542
543 if ((err = i2c_attach_client(new_client)))
544 goto exit_free;
545
546 adm9240_init_client(new_client);
547
548 /* populate sysfs filesystem */
943b0830
MH		 549 data->class_dev = hwmon_device_register(&new_client->dev);
550 if (IS_ERR(data->class_dev)) {
551 err = PTR_ERR(data->class_dev);
552 goto exit_detach;
553 }
554
c7461a66
GC		 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);
40b5cda2 591 device_create_file(&new_client->dev, &dev_attr_temp1_input);
c7461a66
GC		 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);
40b5cda2
GC		 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);
612
613 return 0;
943b0830
MH		 614
615exit_detach:
616 i2c_detach_client(new_client);
40b5cda2 617exit_free:
1f57ff89 618 kfree(data);
40b5cda2
GC		 619exit:
620 return err;
621}
622
623static int adm9240_attach_adapter(struct i2c_adapter *adapter)
624{
625 if (!(adapter->class & I2C_CLASS_HWMON))
626 return 0;
2ed2dc3c 627 return i2c_probe(adapter, &addr_data, adm9240_detect);
40b5cda2
GC		 628}
629
630static int adm9240_detach_client(struct i2c_client *client)
631{
943b0830 632 struct adm9240_data *data = i2c_get_clientdata(client);
40b5cda2
GC		 633 int err;
634
943b0830
MH		 635 hwmon_device_unregister(data->class_dev);
636
7bef5594 637 if ((err = i2c_detach_client(client)))
40b5cda2 638 return err;
40b5cda2 639
943b0830 640 kfree(data);
40b5cda2
GC		 641 return 0;
642}
643
644static void adm9240_init_client(struct i2c_client *client)
645{
646 struct adm9240_data *data = i2c_get_clientdata(client);
205cf13e
GC		 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;
40b5cda2 649
303760b4 650 data->vrm = vid_which_vrm(); /* need this to report vid as mV */
40b5cda2 651
8e8f9289
GC		 652 dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10,
653 data->vrm % 10);
654
40b5cda2
GC		 655 if (conf & 1) { /* measurement cycle running: report state */
656
657 dev_info(&client->dev, "status: config 0x%02x mode %u\n",
658 conf, mode);
659
660 } else { /* cold start: open limits before starting chip */
661 int i;
662
663 for (i = 0; i < 6; i++)
664 {
205cf13e 665 i2c_smbus_write_byte_data(client,
40b5cda2 666 ADM9240_REG_IN_MIN(i), 0);
205cf13e 667 i2c_smbus_write_byte_data(client,
40b5cda2
GC		 668 ADM9240_REG_IN_MAX(i), 255);
669 }
205cf13e
GC		 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,
c7461a66 675 ADM9240_REG_TEMP_MAX(0), 127);
205cf13e 676 i2c_smbus_write_byte_data(client,
c7461a66 677 ADM9240_REG_TEMP_MAX(1), 127);
40b5cda2
GC		 678
679 /* start measurement cycle */
205cf13e 680 i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1);
40b5cda2
GC		 681
682 dev_info(&client->dev, "cold start: config was 0x%02x "
683 "mode %u\n", conf, mode);
684 }
685}
686
687static struct adm9240_data *adm9240_update_device(struct device *dev)
688{
689 struct i2c_client *client = to_i2c_client(dev);
690 struct adm9240_data *data = i2c_get_clientdata(client);
691 int i;
692
693 down(&data->update_lock);
694
695 /* minimum measurement cycle: 1.75 seconds */
696 if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4))
697 || !data->valid) {
698
699 for (i = 0; i < 6; i++) /* read voltages */
700 {
205cf13e 701 data->in[i] = i2c_smbus_read_byte_data(client,
40b5cda2
GC		 702 ADM9240_REG_IN(i));
703 }
205cf13e 704 data->alarms = i2c_smbus_read_byte_data(client,
40b5cda2 705 ADM9240_REG_INT(0)) |
205cf13e 706 i2c_smbus_read_byte_data(client,
40b5cda2
GC		 707 ADM9240_REG_INT(1)) << 8;
708
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 */
205cf13e 712 data->temp = ((i2c_smbus_read_byte_data(client,
40b5cda2 713 ADM9240_REG_TEMP) << 8) |
205cf13e 714 i2c_smbus_read_byte_data(client,
40b5cda2
GC		 715 ADM9240_REG_TEMP_CONF)) / 128;
716
717 for (i = 0; i < 2; i++) /* read fans */
718 {
205cf13e 719 data->fan[i] = i2c_smbus_read_byte_data(client,
40b5cda2
GC		 720 ADM9240_REG_FAN(i));
721
722 /* adjust fan clock divider on overflow */
723 if (data->valid && data->fan[i] == 255 &&
724 data->fan_div[i] < 3) {
725
726 adm9240_write_fan_div(client, i,
727 ++data->fan_div[i]);
728
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;
733 }
734 }
735 data->last_updated_measure = jiffies;
736 }
737
738 /* minimum config reading cycle: 300 seconds */
739 if (time_after(jiffies, data->last_updated_config + (HZ * 300))
740 || !data->valid) {
741
742 for (i = 0; i < 6; i++)
743 {
205cf13e 744 data->in_min[i] = i2c_smbus_read_byte_data(client,
40b5cda2 745 ADM9240_REG_IN_MIN(i));
205cf13e 746 data->in_max[i] = i2c_smbus_read_byte_data(client,
40b5cda2
GC		 747 ADM9240_REG_IN_MAX(i));
748 }
749 for (i = 0; i < 2; i++)
750 {
205cf13e 751 data->fan_min[i] = i2c_smbus_read_byte_data(client,
40b5cda2
GC		 752 ADM9240_REG_FAN_MIN(i));
753 }
c7461a66
GC		 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));
40b5cda2
GC		 758
759 /* read fan divs and 5-bit VID */
205cf13e 760 i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
40b5cda2
GC		 761 data->fan_div[0] = (i >> 4) & 3;
762 data->fan_div[1] = (i >> 6) & 3;
763 data->vid = i & 0x0f;
205cf13e 764 data->vid |= (i2c_smbus_read_byte_data(client,
40b5cda2
GC		 765 ADM9240_REG_VID4) & 1) << 4;
766 /* read analog out */
205cf13e 767 data->aout = i2c_smbus_read_byte_data(client,
40b5cda2
GC		 768 ADM9240_REG_ANALOG_OUT);
769
770 data->last_updated_config = jiffies;
771 data->valid = 1;
772 }
773 up(&data->update_lock);
774 return data;
775}
776
777static int __init sensors_adm9240_init(void)
778{
779 return i2c_add_driver(&adm9240_driver);
780}
781
782static void __exit sensors_adm9240_exit(void)
783{
784 i2c_del_driver(&adm9240_driver);
785}
786
787MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, "
788 "Grant Coady <gcoady@gmail.com> and others");
789MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver");
790MODULE_LICENSE("GPL");
791
792module_init(sensors_adm9240_init);
793module_exit(sensors_adm9240_exit);
794
Linux 6.x block layer and io_uring tree(s)