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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6-block.git] / drivers / hwmon / adm1025.c
CommitLineData
1da177e4
LT		 1/*
2 * adm1025.c
3 *
4 * Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com>
7dbafe02 5 * Copyright (C) 2003-2008 Jean Delvare <khali@linux-fr.org>
1da177e4
LT		 6 *
7 * The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6
8 * voltages (including its own power source) and up to two temperatures
9 * (its own plus up to one external one). Voltages are scaled internally
10 * (which is not the common way) with ratios such that the nominal value
11 * of each voltage correspond to a register value of 192 (which means a
12 * resolution of about 0.5% of the nominal value). Temperature values are
13 * reported with a 1 deg resolution and a 3 deg accuracy. Complete
14 * datasheet can be obtained from Analog's website at:
15 * http://www.analog.com/Analog_Root/productPage/productHome/0,2121,ADM1025,00.html
16 *
17 * This driver also supports the ADM1025A, which differs from the ADM1025
18 * only in that it has "open-drain VID inputs while the ADM1025 has
19 * on-chip 100k pull-ups on the VID inputs". It doesn't make any
20 * difference for us.
21 *
22 * This driver also supports the NE1619, a sensor chip made by Philips.
23 * That chip is similar to the ADM1025A, with a few differences. The only
24 * difference that matters to us is that the NE1619 has only two possible
25 * addresses while the ADM1025A has a third one. Complete datasheet can be
26 * obtained from Philips's website at:
27 * http://www.semiconductors.philips.com/pip/NE1619DS.html
28 *
29 * Since the ADM1025 was the first chipset supported by this driver, most
30 * comments will refer to this chipset, but are actually general and
31 * concern all supported chipsets, unless mentioned otherwise.
32 *
33 * This program is free software; you can redistribute it and/or modify
34 * it under the terms of the GNU General Public License as published by
35 * the Free Software Foundation; either version 2 of the License, or
36 * (at your option) any later version.
37 *
38 * This program is distributed in the hope that it will be useful,
39 * but WITHOUT ANY WARRANTY; without even the implied warranty of
40 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
41 * GNU General Public License for more details.
42 *
43 * You should have received a copy of the GNU General Public License
44 * along with this program; if not, write to the Free Software
45 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
46 */
47
1da177e4
LT		 48#include <linux/module.h>
49#include <linux/init.h>
50#include <linux/slab.h>
51#include <linux/jiffies.h>
52#include <linux/i2c.h>
943b0830 53#include <linux/hwmon.h>
d8543e7f 54#include <linux/hwmon-sysfs.h>
303760b4 55#include <linux/hwmon-vid.h>
943b0830 56#include <linux/err.h>
9a61bf63 57#include <linux/mutex.h>
1da177e4
LT		 58
59/*
60 * Addresses to scan
61 * ADM1025 and ADM1025A have three possible addresses: 0x2c, 0x2d and 0x2e.
62 * NE1619 has two possible addresses: 0x2c and 0x2d.
63 */
64
25e9c86d 65static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
1da177e4
LT		 66
67/*
68 * Insmod parameters
69 */
70
f4b50261 71I2C_CLIENT_INSMOD_2(adm1025, ne1619);
1da177e4
LT		 72
73/*
74 * The ADM1025 registers
75 */
76
77#define ADM1025_REG_MAN_ID 0x3E
4e952799 78#define ADM1025_REG_CHIP_ID 0x3F
1da177e4
LT		 79#define ADM1025_REG_CONFIG 0x40
80#define ADM1025_REG_STATUS1 0x41
81#define ADM1025_REG_STATUS2 0x42
82#define ADM1025_REG_IN(nr) (0x20 + (nr))
83#define ADM1025_REG_IN_MAX(nr) (0x2B + (nr) * 2)
84#define ADM1025_REG_IN_MIN(nr) (0x2C + (nr) * 2)
85#define ADM1025_REG_TEMP(nr) (0x26 + (nr))
86#define ADM1025_REG_TEMP_HIGH(nr) (0x37 + (nr) * 2)
87#define ADM1025_REG_TEMP_LOW(nr) (0x38 + (nr) * 2)
88#define ADM1025_REG_VID 0x47
89#define ADM1025_REG_VID4 0x49
90
91/*
92 * Conversions and various macros
93 * The ADM1025 uses signed 8-bit values for temperatures.
94 */
95
4e952799 96static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 };
1da177e4
LT		 97
98#define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192)
99#define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \
100 (val) * 192 >= (scale) * 255 ? 255 : \
101 ((val) * 192 + (scale)/2) / (scale))
102
103#define TEMP_FROM_REG(reg) ((reg) * 1000)
104#define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \
105 (val) >= 126500 ? 127 : \
106 (((val) < 0 ? (val)-500 : (val)+500) / 1000))
107
108/*
109 * Functions declaration
110 */
111
7dbafe02
JD		 112static int adm1025_probe(struct i2c_client *client,
113 const struct i2c_device_id *id);
114static int adm1025_detect(struct i2c_client *client, int kind,
115 struct i2c_board_info *info);
1da177e4 116static void adm1025_init_client(struct i2c_client *client);
7dbafe02 117static int adm1025_remove(struct i2c_client *client);
1da177e4
LT		 118static struct adm1025_data *adm1025_update_device(struct device *dev);
119
120/*
121 * Driver data (common to all clients)
122 */
123
7dbafe02
JD		 124static const struct i2c_device_id adm1025_id[] = {
125 { "adm1025", adm1025 },
126 { "ne1619", ne1619 },
127 { }
128};
129MODULE_DEVICE_TABLE(i2c, adm1025_id);
130
1da177e4 131static struct i2c_driver adm1025_driver = {
7dbafe02 132 .class = I2C_CLASS_HWMON,
cdaf7934 133 .driver = {
cdaf7934
LR		 134 .name = "adm1025",
135 },
7dbafe02
JD		 136 .probe = adm1025_probe,
137 .remove = adm1025_remove,
138 .id_table = adm1025_id,
139 .detect = adm1025_detect,
140 .address_data = &addr_data,
1da177e4
LT		 141};
142
143/*
144 * Client data (each client gets its own)
145 */
146
147struct adm1025_data {
1beeffe4 148 struct device *hwmon_dev;
9a61bf63 149 struct mutex update_lock;
1da177e4
LT		 150 char valid; /* zero until following fields are valid */
151 unsigned long last_updated; /* in jiffies */
152
153 u8 in[6]; /* register value */
154 u8 in_max[6]; /* register value */
155 u8 in_min[6]; /* register value */
156 s8 temp[2]; /* register value */
157 s8 temp_min[2]; /* register value */
158 s8 temp_max[2]; /* register value */
159 u16 alarms; /* register values, combined */
160 u8 vid; /* register values, combined */
161 u8 vrm;
162};
163
164/*
165 * Sysfs stuff
166 */
167
d8543e7f
JD		 168static ssize_t
169show_in(struct device *dev, struct device_attribute *attr, char *buf)
170{
171 int index = to_sensor_dev_attr(attr)->index;
172 struct adm1025_data *data = adm1025_update_device(dev);
173 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[index],
174 in_scale[index]));
175}
176
177static ssize_t
178show_in_min(struct device *dev, struct device_attribute *attr, char *buf)
179{
180 int index = to_sensor_dev_attr(attr)->index;
181 struct adm1025_data *data = adm1025_update_device(dev);
182 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[index],
183 in_scale[index]));
184}
185
186static ssize_t
187show_in_max(struct device *dev, struct device_attribute *attr, char *buf)
188{
189 int index = to_sensor_dev_attr(attr)->index;
190 struct adm1025_data *data = adm1025_update_device(dev);
191 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[index],
192 in_scale[index]));
193}
194
195static ssize_t
196show_temp(struct device *dev, struct device_attribute *attr, char *buf)
197{
198 int index = to_sensor_dev_attr(attr)->index;
199 struct adm1025_data *data = adm1025_update_device(dev);
200 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[index]));
201}
202
203static ssize_t
204show_temp_min(struct device *dev, struct device_attribute *attr, char *buf)
205{
206 int index = to_sensor_dev_attr(attr)->index;
207 struct adm1025_data *data = adm1025_update_device(dev);
208 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[index]));
209}
210
211static ssize_t
212show_temp_max(struct device *dev, struct device_attribute *attr, char *buf)
213{
214 int index = to_sensor_dev_attr(attr)->index;
215 struct adm1025_data *data = adm1025_update_device(dev);
216 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index]));
217}
218
219static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
220 const char *buf, size_t count)
221{
222 int index = to_sensor_dev_attr(attr)->index;
223 struct i2c_client *client = to_i2c_client(dev);
224 struct adm1025_data *data = i2c_get_clientdata(client);
225 long val = simple_strtol(buf, NULL, 10);
226
227 mutex_lock(&data->update_lock);
228 data->in_min[index] = IN_TO_REG(val, in_scale[index]);
229 i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index),
230 data->in_min[index]);
231 mutex_unlock(&data->update_lock);
232 return count;
233}
234
235static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
236 const char *buf, size_t count)
237{
238 int index = to_sensor_dev_attr(attr)->index;
239 struct i2c_client *client = to_i2c_client(dev);
240 struct adm1025_data *data = i2c_get_clientdata(client);
241 long val = simple_strtol(buf, NULL, 10);
242
243 mutex_lock(&data->update_lock);
244 data->in_max[index] = IN_TO_REG(val, in_scale[index]);
245 i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index),
246 data->in_max[index]);
247 mutex_unlock(&data->update_lock);
248 return count;
249}
1da177e4
LT		 250
251#define set_in(offset) \
d8543e7f
JD		 252static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
253 show_in, NULL, offset); \
254static SENSOR_DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \
255 show_in_min, set_in_min, offset); \
256static SENSOR_DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \
257 show_in_max, set_in_max, offset)
1da177e4
LT		 258set_in(0);
259set_in(1);
260set_in(2);
261set_in(3);
262set_in(4);
263set_in(5);
264
d8543e7f
JD		 265static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
266 const char *buf, size_t count)
267{
268 int index = to_sensor_dev_attr(attr)->index;
269 struct i2c_client *client = to_i2c_client(dev);
270 struct adm1025_data *data = i2c_get_clientdata(client);
271 long val = simple_strtol(buf, NULL, 10);
272
273 mutex_lock(&data->update_lock);
274 data->temp_min[index] = TEMP_TO_REG(val);
275 i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index),
276 data->temp_min[index]);
277 mutex_unlock(&data->update_lock);
278 return count;
279}
280
281static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
282 const char *buf, size_t count)
283{
284 int index = to_sensor_dev_attr(attr)->index;
285 struct i2c_client *client = to_i2c_client(dev);
286 struct adm1025_data *data = i2c_get_clientdata(client);
287 long val = simple_strtol(buf, NULL, 10);
288
289 mutex_lock(&data->update_lock);
290 data->temp_max[index] = TEMP_TO_REG(val);
291 i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index),
292 data->temp_max[index]);
293 mutex_unlock(&data->update_lock);
294 return count;
295}
296
1da177e4 297#define set_temp(offset) \
d8543e7f
JD		 298static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
299 show_temp, NULL, offset - 1); \
300static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \
301 show_temp_min, set_temp_min, offset - 1); \
302static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \
303 show_temp_max, set_temp_max, offset - 1)
1da177e4
LT		 304set_temp(1);
305set_temp(2);
306
4e952799
JD		 307static ssize_t
308show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 309{
310 struct adm1025_data *data = adm1025_update_device(dev);
311 return sprintf(buf, "%u\n", data->alarms);
312}
313static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
314
bb081300
JD		 315static ssize_t
316show_alarm(struct device *dev, struct device_attribute *attr, char *buf)
317{
318 int bitnr = to_sensor_dev_attr(attr)->index;
319 struct adm1025_data *data = adm1025_update_device(dev);
320 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
321}
322static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
323static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
324static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
325static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
326static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
327static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
328static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 5);
329static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 4);
330static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14);
331
4e952799
JD		 332static ssize_t
333show_vid(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 334{
335 struct adm1025_data *data = adm1025_update_device(dev);
336 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
337}
937df8df 338static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
1da177e4 339
4e952799
JD		 340static ssize_t
341show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4 342{
90d6619a 343 struct adm1025_data *data = dev_get_drvdata(dev);
1da177e4
LT		 344 return sprintf(buf, "%u\n", data->vrm);
345}
4e952799
JD		 346static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
347 const char *buf, size_t count)
1da177e4 348{
8f74efe8 349 struct adm1025_data *data = dev_get_drvdata(dev);
1da177e4
LT		 350 data->vrm = simple_strtoul(buf, NULL, 10);
351 return count;
352}
353static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
354
355/*
356 * Real code
357 */
358
681c6f7a 359static struct attribute *adm1025_attributes[] = {
d8543e7f
JD		 360 &sensor_dev_attr_in0_input.dev_attr.attr,
361 &sensor_dev_attr_in1_input.dev_attr.attr,
362 &sensor_dev_attr_in2_input.dev_attr.attr,
363 &sensor_dev_attr_in3_input.dev_attr.attr,
364 &sensor_dev_attr_in5_input.dev_attr.attr,
365 &sensor_dev_attr_in0_min.dev_attr.attr,
366 &sensor_dev_attr_in1_min.dev_attr.attr,
367 &sensor_dev_attr_in2_min.dev_attr.attr,
368 &sensor_dev_attr_in3_min.dev_attr.attr,
369 &sensor_dev_attr_in5_min.dev_attr.attr,
370 &sensor_dev_attr_in0_max.dev_attr.attr,
371 &sensor_dev_attr_in1_max.dev_attr.attr,
372 &sensor_dev_attr_in2_max.dev_attr.attr,
373 &sensor_dev_attr_in3_max.dev_attr.attr,
374 &sensor_dev_attr_in5_max.dev_attr.attr,
bb081300
JD		 375 &sensor_dev_attr_in0_alarm.dev_attr.attr,
376 &sensor_dev_attr_in1_alarm.dev_attr.attr,
377 &sensor_dev_attr_in2_alarm.dev_attr.attr,
378 &sensor_dev_attr_in3_alarm.dev_attr.attr,
379 &sensor_dev_attr_in5_alarm.dev_attr.attr,
d8543e7f
JD		 380 &sensor_dev_attr_temp1_input.dev_attr.attr,
381 &sensor_dev_attr_temp2_input.dev_attr.attr,
382 &sensor_dev_attr_temp1_min.dev_attr.attr,
383 &sensor_dev_attr_temp2_min.dev_attr.attr,
384 &sensor_dev_attr_temp1_max.dev_attr.attr,
385 &sensor_dev_attr_temp2_max.dev_attr.attr,
bb081300
JD		 386 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
387 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
388 &sensor_dev_attr_temp1_fault.dev_attr.attr,
681c6f7a
MH		 389 &dev_attr_alarms.attr,
390 &dev_attr_cpu0_vid.attr,
391 &dev_attr_vrm.attr,
392 NULL
393};
394
395static const struct attribute_group adm1025_group = {
396 .attrs = adm1025_attributes,
397};
398
4e952799 399static struct attribute *adm1025_attributes_in4[] = {
d8543e7f
JD		 400 &sensor_dev_attr_in4_input.dev_attr.attr,
401 &sensor_dev_attr_in4_min.dev_attr.attr,
402 &sensor_dev_attr_in4_max.dev_attr.attr,
bb081300 403 &sensor_dev_attr_in4_alarm.dev_attr.attr,
681c6f7a
MH		 404 NULL
405};
406
4e952799
JD		 407static const struct attribute_group adm1025_group_in4 = {
408 .attrs = adm1025_attributes_in4,
681c6f7a
MH		 409};
410
7dbafe02
JD		 411/* Return 0 if detection is successful, -ENODEV otherwise */
412static int adm1025_detect(struct i2c_client *client, int kind,
413 struct i2c_board_info *info)
1da177e4 414{
7dbafe02 415 struct i2c_adapter *adapter = client->adapter;
1da177e4
LT		 416 const char *name = "";
417 u8 config;
418
419 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
7dbafe02 420 return -ENODEV;
1da177e4
LT		 421
422 /*
423 * Now we do the remaining detection. A negative kind means that
424 * the driver was loaded with no force parameter (default), so we
425 * must both detect and identify the chip. A zero kind means that
426 * the driver was loaded with the force parameter, the detection
427 * step shall be skipped. A positive kind means that the driver
428 * was loaded with the force parameter and a given kind of chip is
429 * requested, so both the detection and the identification steps
430 * are skipped.
431 */
4e952799 432 config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
1da177e4
LT		 433 if (kind < 0) { /* detection */
434 if ((config & 0x80) != 0x00
4e952799 435 || (i2c_smbus_read_byte_data(client,
1da177e4 436 ADM1025_REG_STATUS1) & 0xC0) != 0x00
4e952799 437 || (i2c_smbus_read_byte_data(client,
1da177e4
LT		 438 ADM1025_REG_STATUS2) & 0xBC) != 0x00) {
439 dev_dbg(&adapter->dev,
440 "ADM1025 detection failed at 0x%02x.\n",
7dbafe02
JD		 441 client->addr);
442 return -ENODEV;
1da177e4
LT		 443 }
444 }
445
446 if (kind <= 0) { /* identification */
447 u8 man_id, chip_id;
448
4e952799
JD		 449 man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID);
450 chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID);
451
1da177e4
LT		 452 if (man_id == 0x41) { /* Analog Devices */
453 if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */
454 kind = adm1025;
455 }
456 } else
457 if (man_id == 0xA1) { /* Philips */
7dbafe02 458 if (client->addr != 0x2E
1da177e4
LT		 459 && (chip_id & 0xF0) == 0x20) { /* NE1619 */
460 kind = ne1619;
461 }
462 }
463
464 if (kind <= 0) { /* identification failed */
465 dev_info(&adapter->dev,
466 "Unsupported chip (man_id=0x%02X, "
467 "chip_id=0x%02X).\n", man_id, chip_id);
7dbafe02 468 return -ENODEV;
1da177e4
LT		 469 }
470 }
471
472 if (kind == adm1025) {
473 name = "adm1025";
474 } else if (kind == ne1619) {
475 name = "ne1619";
476 }
7dbafe02 477 strlcpy(info->type, name, I2C_NAME_SIZE);
1da177e4 478
7dbafe02
JD		 479 return 0;
480}
1da177e4 481
7dbafe02
JD		 482static int adm1025_probe(struct i2c_client *client,
483 const struct i2c_device_id *id)
484{
485 struct adm1025_data *data;
486 int err;
487 u8 config;
488
489 data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL);
490 if (!data) {
491 err = -ENOMEM;
492 goto exit;
493 }
494
495 i2c_set_clientdata(client, data);
496 mutex_init(&data->update_lock);
1da177e4
LT		 497
498 /* Initialize the ADM1025 chip */
4e952799 499 adm1025_init_client(client);
1da177e4
LT		 500
501 /* Register sysfs hooks */
4e952799 502 if ((err = sysfs_create_group(&client->dev.kobj, &adm1025_group)))
7dbafe02 503 goto exit_free;
1da177e4
LT		 504
505 /* Pin 11 is either in4 (+12V) or VID4 */
7dbafe02 506 config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
1da177e4 507 if (!(config & 0x20)) {
4e952799
JD		 508 if ((err = sysfs_create_group(&client->dev.kobj,
509 &adm1025_group_in4)))
681c6f7a
MH		 510 goto exit_remove;
511 }
512
4e952799 513 data->hwmon_dev = hwmon_device_register(&client->dev);
1beeffe4
TJ		 514 if (IS_ERR(data->hwmon_dev)) {
515 err = PTR_ERR(data->hwmon_dev);
681c6f7a 516 goto exit_remove;
1da177e4
LT		 517 }
518
519 return 0;
520
681c6f7a 521exit_remove:
4e952799
JD		 522 sysfs_remove_group(&client->dev.kobj, &adm1025_group);
523 sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4);
1da177e4
LT		 524exit_free:
525 kfree(data);
526exit:
527 return err;
528}
529
530static void adm1025_init_client(struct i2c_client *client)
531{
532 u8 reg;
533 struct adm1025_data *data = i2c_get_clientdata(client);
534 int i;
535
303760b4 536 data->vrm = vid_which_vrm();
1da177e4
LT		 537
538 /*
539 * Set high limits
540 * Usually we avoid setting limits on driver init, but it happens
541 * that the ADM1025 comes with stupid default limits (all registers
542 * set to 0). In case the chip has not gone through any limit
543 * setting yet, we better set the high limits to the max so that
544 * no alarm triggers.
545 */
546 for (i=0; i<6; i++) {
547 reg = i2c_smbus_read_byte_data(client,
548 ADM1025_REG_IN_MAX(i));
549 if (reg == 0)
550 i2c_smbus_write_byte_data(client,
551 ADM1025_REG_IN_MAX(i),
552 0xFF);
553 }
554 for (i=0; i<2; i++) {
555 reg = i2c_smbus_read_byte_data(client,
556 ADM1025_REG_TEMP_HIGH(i));
557 if (reg == 0)
558 i2c_smbus_write_byte_data(client,
559 ADM1025_REG_TEMP_HIGH(i),
560 0x7F);
561 }
562
563 /*
564 * Start the conversions
565 */
566 reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
567 if (!(reg & 0x01))
568 i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG,
569 (reg&0x7E)|0x01);
570}
571
7dbafe02 572static int adm1025_remove(struct i2c_client *client)
1da177e4 573{
943b0830 574 struct adm1025_data *data = i2c_get_clientdata(client);
1da177e4 575
1beeffe4 576 hwmon_device_unregister(data->hwmon_dev);
681c6f7a 577 sysfs_remove_group(&client->dev.kobj, &adm1025_group);
4e952799 578 sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4);
943b0830 579
943b0830 580 kfree(data);
1da177e4
LT		 581 return 0;
582}
583
584static struct adm1025_data *adm1025_update_device(struct device *dev)
585{
586 struct i2c_client *client = to_i2c_client(dev);
587 struct adm1025_data *data = i2c_get_clientdata(client);
588
9a61bf63 589 mutex_lock(&data->update_lock);
1da177e4
LT		 590
591 if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
592 int i;
593
594 dev_dbg(&client->dev, "Updating data.\n");
595 for (i=0; i<6; i++) {
596 data->in[i] = i2c_smbus_read_byte_data(client,
597 ADM1025_REG_IN(i));
598 data->in_min[i] = i2c_smbus_read_byte_data(client,
599 ADM1025_REG_IN_MIN(i));
600 data->in_max[i] = i2c_smbus_read_byte_data(client,
601 ADM1025_REG_IN_MAX(i));
602 }
603 for (i=0; i<2; i++) {
604 data->temp[i] = i2c_smbus_read_byte_data(client,
605 ADM1025_REG_TEMP(i));
606 data->temp_min[i] = i2c_smbus_read_byte_data(client,
607 ADM1025_REG_TEMP_LOW(i));
608 data->temp_max[i] = i2c_smbus_read_byte_data(client,
609 ADM1025_REG_TEMP_HIGH(i));
610 }
611 data->alarms = i2c_smbus_read_byte_data(client,
612 ADM1025_REG_STATUS1)
613 | (i2c_smbus_read_byte_data(client,
614 ADM1025_REG_STATUS2) << 8);
615 data->vid = (i2c_smbus_read_byte_data(client,
616 ADM1025_REG_VID) & 0x0f)
617 | ((i2c_smbus_read_byte_data(client,
618 ADM1025_REG_VID4) & 0x01) << 4);
619
620 data->last_updated = jiffies;
621 data->valid = 1;
622 }
623
9a61bf63 624 mutex_unlock(&data->update_lock);
1da177e4
LT		 625
626 return data;
627}
628
629static int __init sensors_adm1025_init(void)
630{
631 return i2c_add_driver(&adm1025_driver);
632}
633
634static void __exit sensors_adm1025_exit(void)
635{
636 i2c_del_driver(&adm1025_driver);
637}
638
639MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
640MODULE_DESCRIPTION("ADM1025 driver");
641MODULE_LICENSE("GPL");
642
643module_init(sensors_adm1025_init);
644module_exit(sensors_adm1025_exit);
Linux 6.x block layer and io_uring tree(s)