Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * lm83.c - Part of lm_sensors, Linux kernel modules for hardware | |
3 | * monitoring | |
2d45771e | 4 | * Copyright (C) 2003-2006 Jean Delvare <khali@linux-fr.org> |
1da177e4 LT |
5 | * |
6 | * Heavily inspired from the lm78, lm75 and adm1021 drivers. The LM83 is | |
7 | * a sensor chip made by National Semiconductor. It reports up to four | |
8 | * temperatures (its own plus up to three external ones) with a 1 deg | |
9 | * resolution and a 3-4 deg accuracy. Complete datasheet can be obtained | |
10 | * from National's website at: | |
11 | * http://www.national.com/pf/LM/LM83.html | |
12 | * Since the datasheet omits to give the chip stepping code, I give it | |
13 | * here: 0x03 (at register 0xff). | |
14 | * | |
43cb7ebe JC |
15 | * Also supports the LM82 temp sensor, which is basically a stripped down |
16 | * model of the LM83. Datasheet is here: | |
17 | * http://www.national.com/pf/LM/LM82.html | |
18 | * | |
1da177e4 LT |
19 | * This program is free software; you can redistribute it and/or modify |
20 | * it under the terms of the GNU General Public License as published by | |
21 | * the Free Software Foundation; either version 2 of the License, or | |
22 | * (at your option) any later version. | |
23 | * | |
24 | * This program is distributed in the hope that it will be useful, | |
25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
27 | * GNU General Public License for more details. | |
28 | * | |
29 | * You should have received a copy of the GNU General Public License | |
30 | * along with this program; if not, write to the Free Software | |
31 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
32 | */ | |
33 | ||
1da177e4 LT |
34 | #include <linux/module.h> |
35 | #include <linux/init.h> | |
36 | #include <linux/slab.h> | |
37 | #include <linux/jiffies.h> | |
38 | #include <linux/i2c.h> | |
10c08f81 | 39 | #include <linux/hwmon-sysfs.h> |
943b0830 MH |
40 | #include <linux/hwmon.h> |
41 | #include <linux/err.h> | |
9a61bf63 | 42 | #include <linux/mutex.h> |
0e39e01c | 43 | #include <linux/sysfs.h> |
1da177e4 LT |
44 | |
45 | /* | |
46 | * Addresses to scan | |
47 | * Address is selected using 2 three-level pins, resulting in 9 possible | |
48 | * addresses. | |
49 | */ | |
50 | ||
51 | static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a, | |
52 | 0x29, 0x2a, 0x2b, | |
53 | 0x4c, 0x4d, 0x4e, | |
54 | I2C_CLIENT_END }; | |
1da177e4 LT |
55 | |
56 | /* | |
57 | * Insmod parameters | |
58 | */ | |
59 | ||
43cb7ebe | 60 | I2C_CLIENT_INSMOD_2(lm83, lm82); |
1da177e4 LT |
61 | |
62 | /* | |
63 | * The LM83 registers | |
64 | * Manufacturer ID is 0x01 for National Semiconductor. | |
65 | */ | |
66 | ||
67 | #define LM83_REG_R_MAN_ID 0xFE | |
68 | #define LM83_REG_R_CHIP_ID 0xFF | |
69 | #define LM83_REG_R_CONFIG 0x03 | |
70 | #define LM83_REG_W_CONFIG 0x09 | |
71 | #define LM83_REG_R_STATUS1 0x02 | |
72 | #define LM83_REG_R_STATUS2 0x35 | |
73 | #define LM83_REG_R_LOCAL_TEMP 0x00 | |
74 | #define LM83_REG_R_LOCAL_HIGH 0x05 | |
75 | #define LM83_REG_W_LOCAL_HIGH 0x0B | |
76 | #define LM83_REG_R_REMOTE1_TEMP 0x30 | |
77 | #define LM83_REG_R_REMOTE1_HIGH 0x38 | |
78 | #define LM83_REG_W_REMOTE1_HIGH 0x50 | |
79 | #define LM83_REG_R_REMOTE2_TEMP 0x01 | |
80 | #define LM83_REG_R_REMOTE2_HIGH 0x07 | |
81 | #define LM83_REG_W_REMOTE2_HIGH 0x0D | |
82 | #define LM83_REG_R_REMOTE3_TEMP 0x31 | |
83 | #define LM83_REG_R_REMOTE3_HIGH 0x3A | |
84 | #define LM83_REG_W_REMOTE3_HIGH 0x52 | |
85 | #define LM83_REG_R_TCRIT 0x42 | |
86 | #define LM83_REG_W_TCRIT 0x5A | |
87 | ||
88 | /* | |
89 | * Conversions and various macros | |
44bbe87e | 90 | * The LM83 uses signed 8-bit values with LSB = 1 degree Celsius. |
1da177e4 LT |
91 | */ |
92 | ||
93 | #define TEMP_FROM_REG(val) ((val) * 1000) | |
94 | #define TEMP_TO_REG(val) ((val) <= -128000 ? -128 : \ | |
95 | (val) >= 127000 ? 127 : \ | |
96 | (val) < 0 ? ((val) - 500) / 1000 : \ | |
97 | ((val) + 500) / 1000) | |
98 | ||
99 | static const u8 LM83_REG_R_TEMP[] = { | |
100 | LM83_REG_R_LOCAL_TEMP, | |
101 | LM83_REG_R_REMOTE1_TEMP, | |
102 | LM83_REG_R_REMOTE2_TEMP, | |
1a86c051 | 103 | LM83_REG_R_REMOTE3_TEMP, |
1da177e4 LT |
104 | LM83_REG_R_LOCAL_HIGH, |
105 | LM83_REG_R_REMOTE1_HIGH, | |
106 | LM83_REG_R_REMOTE2_HIGH, | |
1a86c051 JD |
107 | LM83_REG_R_REMOTE3_HIGH, |
108 | LM83_REG_R_TCRIT, | |
1da177e4 LT |
109 | }; |
110 | ||
111 | static const u8 LM83_REG_W_HIGH[] = { | |
112 | LM83_REG_W_LOCAL_HIGH, | |
113 | LM83_REG_W_REMOTE1_HIGH, | |
114 | LM83_REG_W_REMOTE2_HIGH, | |
1a86c051 JD |
115 | LM83_REG_W_REMOTE3_HIGH, |
116 | LM83_REG_W_TCRIT, | |
1da177e4 LT |
117 | }; |
118 | ||
119 | /* | |
120 | * Functions declaration | |
121 | */ | |
122 | ||
123 | static int lm83_attach_adapter(struct i2c_adapter *adapter); | |
124 | static int lm83_detect(struct i2c_adapter *adapter, int address, int kind); | |
125 | static int lm83_detach_client(struct i2c_client *client); | |
126 | static struct lm83_data *lm83_update_device(struct device *dev); | |
127 | ||
128 | /* | |
129 | * Driver data (common to all clients) | |
130 | */ | |
131 | ||
132 | static struct i2c_driver lm83_driver = { | |
cdaf7934 | 133 | .driver = { |
cdaf7934 LR |
134 | .name = "lm83", |
135 | }, | |
1da177e4 LT |
136 | .attach_adapter = lm83_attach_adapter, |
137 | .detach_client = lm83_detach_client, | |
138 | }; | |
139 | ||
140 | /* | |
141 | * Client data (each client gets its own) | |
142 | */ | |
143 | ||
144 | struct lm83_data { | |
145 | struct i2c_client client; | |
1beeffe4 | 146 | struct device *hwmon_dev; |
9a61bf63 | 147 | struct mutex update_lock; |
1da177e4 LT |
148 | char valid; /* zero until following fields are valid */ |
149 | unsigned long last_updated; /* in jiffies */ | |
150 | ||
151 | /* registers values */ | |
1a86c051 JD |
152 | s8 temp[9]; /* 0..3: input 1-4, |
153 | 4..7: high limit 1-4, | |
154 | 8 : critical limit */ | |
1da177e4 LT |
155 | u16 alarms; /* bitvector, combined */ |
156 | }; | |
157 | ||
158 | /* | |
159 | * Sysfs stuff | |
160 | */ | |
161 | ||
1a86c051 JD |
162 | static ssize_t show_temp(struct device *dev, struct device_attribute *devattr, |
163 | char *buf) | |
164 | { | |
165 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
166 | struct lm83_data *data = lm83_update_device(dev); | |
167 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index])); | |
1da177e4 | 168 | } |
1a86c051 JD |
169 | |
170 | static ssize_t set_temp(struct device *dev, struct device_attribute *devattr, | |
171 | const char *buf, size_t count) | |
172 | { | |
173 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
174 | struct i2c_client *client = to_i2c_client(dev); | |
175 | struct lm83_data *data = i2c_get_clientdata(client); | |
176 | long val = simple_strtol(buf, NULL, 10); | |
177 | int nr = attr->index; | |
178 | ||
9a61bf63 | 179 | mutex_lock(&data->update_lock); |
1a86c051 JD |
180 | data->temp[nr] = TEMP_TO_REG(val); |
181 | i2c_smbus_write_byte_data(client, LM83_REG_W_HIGH[nr - 4], | |
182 | data->temp[nr]); | |
9a61bf63 | 183 | mutex_unlock(&data->update_lock); |
1a86c051 | 184 | return count; |
1da177e4 | 185 | } |
1da177e4 | 186 | |
1a86c051 JD |
187 | static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, |
188 | char *buf) | |
1da177e4 LT |
189 | { |
190 | struct lm83_data *data = lm83_update_device(dev); | |
191 | return sprintf(buf, "%d\n", data->alarms); | |
192 | } | |
193 | ||
2d45771e JD |
194 | static ssize_t show_alarm(struct device *dev, struct device_attribute |
195 | *devattr, char *buf) | |
196 | { | |
197 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
198 | struct lm83_data *data = lm83_update_device(dev); | |
199 | int bitnr = attr->index; | |
200 | ||
201 | return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1); | |
202 | } | |
203 | ||
1a86c051 JD |
204 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); |
205 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); | |
206 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); | |
207 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); | |
208 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp, | |
209 | set_temp, 4); | |
210 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp, | |
211 | set_temp, 5); | |
212 | static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp, | |
213 | set_temp, 6); | |
214 | static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp, | |
215 | set_temp, 7); | |
216 | static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp, NULL, 8); | |
217 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp, NULL, 8); | |
218 | static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp, | |
219 | set_temp, 8); | |
220 | static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp, NULL, 8); | |
2d45771e JD |
221 | |
222 | /* Individual alarm files */ | |
223 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0); | |
224 | static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 1); | |
7817a39e | 225 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2); |
2d45771e JD |
226 | static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 4); |
227 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); | |
228 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 8); | |
229 | static SENSOR_DEVICE_ATTR(temp4_crit_alarm, S_IRUGO, show_alarm, NULL, 9); | |
7817a39e | 230 | static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_alarm, NULL, 10); |
2d45771e | 231 | static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_alarm, NULL, 12); |
7817a39e | 232 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 13); |
2d45771e JD |
233 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 15); |
234 | /* Raw alarm file for compatibility */ | |
1da177e4 LT |
235 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
236 | ||
0e39e01c JD |
237 | static struct attribute *lm83_attributes[] = { |
238 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
239 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
240 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
241 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
242 | &sensor_dev_attr_temp1_crit.dev_attr.attr, | |
243 | &sensor_dev_attr_temp3_crit.dev_attr.attr, | |
244 | ||
245 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
246 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, | |
7817a39e | 247 | &sensor_dev_attr_temp3_fault.dev_attr.attr, |
0e39e01c JD |
248 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, |
249 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
250 | &dev_attr_alarms.attr, | |
251 | NULL | |
252 | }; | |
253 | ||
254 | static const struct attribute_group lm83_group = { | |
255 | .attrs = lm83_attributes, | |
256 | }; | |
257 | ||
258 | static struct attribute *lm83_attributes_opt[] = { | |
259 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
260 | &sensor_dev_attr_temp4_input.dev_attr.attr, | |
261 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
262 | &sensor_dev_attr_temp4_max.dev_attr.attr, | |
263 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
264 | &sensor_dev_attr_temp4_crit.dev_attr.attr, | |
265 | ||
266 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
267 | &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, | |
7817a39e | 268 | &sensor_dev_attr_temp4_fault.dev_attr.attr, |
0e39e01c | 269 | &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, |
7817a39e | 270 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
0e39e01c JD |
271 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, |
272 | NULL | |
273 | }; | |
274 | ||
275 | static const struct attribute_group lm83_group_opt = { | |
276 | .attrs = lm83_attributes_opt, | |
277 | }; | |
278 | ||
1da177e4 LT |
279 | /* |
280 | * Real code | |
281 | */ | |
282 | ||
283 | static int lm83_attach_adapter(struct i2c_adapter *adapter) | |
284 | { | |
285 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
286 | return 0; | |
2ed2dc3c | 287 | return i2c_probe(adapter, &addr_data, lm83_detect); |
1da177e4 LT |
288 | } |
289 | ||
290 | /* | |
291 | * The following function does more than just detection. If detection | |
292 | * succeeds, it also registers the new chip. | |
293 | */ | |
294 | static int lm83_detect(struct i2c_adapter *adapter, int address, int kind) | |
295 | { | |
296 | struct i2c_client *new_client; | |
297 | struct lm83_data *data; | |
298 | int err = 0; | |
299 | const char *name = ""; | |
300 | ||
301 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
302 | goto exit; | |
303 | ||
ba9c2e8d | 304 | if (!(data = kzalloc(sizeof(struct lm83_data), GFP_KERNEL))) { |
1da177e4 LT |
305 | err = -ENOMEM; |
306 | goto exit; | |
307 | } | |
1da177e4 LT |
308 | |
309 | /* The common I2C client data is placed right after the | |
310 | * LM83-specific data. */ | |
311 | new_client = &data->client; | |
312 | i2c_set_clientdata(new_client, data); | |
313 | new_client->addr = address; | |
314 | new_client->adapter = adapter; | |
315 | new_client->driver = &lm83_driver; | |
316 | new_client->flags = 0; | |
317 | ||
318 | /* Now we do the detection and identification. A negative kind | |
319 | * means that the driver was loaded with no force parameter | |
320 | * (default), so we must both detect and identify the chip | |
321 | * (actually there is only one possible kind of chip for now, LM83). | |
322 | * A zero kind means that the driver was loaded with the force | |
323 | * parameter, the detection step shall be skipped. A positive kind | |
324 | * means that the driver was loaded with the force parameter and a | |
325 | * given kind of chip is requested, so both the detection and the | |
326 | * identification steps are skipped. */ | |
327 | ||
328 | /* Default to an LM83 if forced */ | |
329 | if (kind == 0) | |
330 | kind = lm83; | |
331 | ||
332 | if (kind < 0) { /* detection */ | |
333 | if (((i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS1) | |
334 | & 0xA8) != 0x00) || | |
335 | ((i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS2) | |
336 | & 0x48) != 0x00) || | |
337 | ((i2c_smbus_read_byte_data(new_client, LM83_REG_R_CONFIG) | |
338 | & 0x41) != 0x00)) { | |
339 | dev_dbg(&adapter->dev, | |
340 | "LM83 detection failed at 0x%02x.\n", address); | |
341 | goto exit_free; | |
342 | } | |
343 | } | |
344 | ||
345 | if (kind <= 0) { /* identification */ | |
346 | u8 man_id, chip_id; | |
347 | ||
348 | man_id = i2c_smbus_read_byte_data(new_client, | |
349 | LM83_REG_R_MAN_ID); | |
350 | chip_id = i2c_smbus_read_byte_data(new_client, | |
351 | LM83_REG_R_CHIP_ID); | |
352 | ||
353 | if (man_id == 0x01) { /* National Semiconductor */ | |
354 | if (chip_id == 0x03) { | |
355 | kind = lm83; | |
43cb7ebe JC |
356 | } else |
357 | if (chip_id == 0x01) { | |
358 | kind = lm82; | |
1da177e4 LT |
359 | } |
360 | } | |
361 | ||
362 | if (kind <= 0) { /* identification failed */ | |
363 | dev_info(&adapter->dev, | |
364 | "Unsupported chip (man_id=0x%02X, " | |
365 | "chip_id=0x%02X).\n", man_id, chip_id); | |
366 | goto exit_free; | |
367 | } | |
368 | } | |
369 | ||
370 | if (kind == lm83) { | |
371 | name = "lm83"; | |
43cb7ebe JC |
372 | } else |
373 | if (kind == lm82) { | |
374 | name = "lm82"; | |
1da177e4 LT |
375 | } |
376 | ||
377 | /* We can fill in the remaining client fields */ | |
378 | strlcpy(new_client->name, name, I2C_NAME_SIZE); | |
379 | data->valid = 0; | |
9a61bf63 | 380 | mutex_init(&data->update_lock); |
1da177e4 LT |
381 | |
382 | /* Tell the I2C layer a new client has arrived */ | |
383 | if ((err = i2c_attach_client(new_client))) | |
384 | goto exit_free; | |
385 | ||
386 | /* | |
0e39e01c | 387 | * Register sysfs hooks |
43cb7ebe JC |
388 | * The LM82 can only monitor one external diode which is |
389 | * at the same register as the LM83 temp3 entry - so we | |
390 | * declare 1 and 3 common, and then 2 and 4 only for the LM83. | |
391 | */ | |
392 | ||
0e39e01c JD |
393 | if ((err = sysfs_create_group(&new_client->dev.kobj, &lm83_group))) |
394 | goto exit_detach; | |
1da177e4 | 395 | |
43cb7ebe | 396 | if (kind == lm83) { |
0e39e01c JD |
397 | if ((err = sysfs_create_group(&new_client->dev.kobj, |
398 | &lm83_group_opt))) | |
399 | goto exit_remove_files; | |
400 | } | |
401 | ||
1beeffe4 TJ |
402 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
403 | if (IS_ERR(data->hwmon_dev)) { | |
404 | err = PTR_ERR(data->hwmon_dev); | |
0e39e01c | 405 | goto exit_remove_files; |
43cb7ebe JC |
406 | } |
407 | ||
1da177e4 LT |
408 | return 0; |
409 | ||
0e39e01c JD |
410 | exit_remove_files: |
411 | sysfs_remove_group(&new_client->dev.kobj, &lm83_group); | |
412 | sysfs_remove_group(&new_client->dev.kobj, &lm83_group_opt); | |
943b0830 MH |
413 | exit_detach: |
414 | i2c_detach_client(new_client); | |
1da177e4 LT |
415 | exit_free: |
416 | kfree(data); | |
417 | exit: | |
418 | return err; | |
419 | } | |
420 | ||
421 | static int lm83_detach_client(struct i2c_client *client) | |
422 | { | |
943b0830 | 423 | struct lm83_data *data = i2c_get_clientdata(client); |
1da177e4 LT |
424 | int err; |
425 | ||
1beeffe4 | 426 | hwmon_device_unregister(data->hwmon_dev); |
0e39e01c JD |
427 | sysfs_remove_group(&client->dev.kobj, &lm83_group); |
428 | sysfs_remove_group(&client->dev.kobj, &lm83_group_opt); | |
943b0830 | 429 | |
7bef5594 | 430 | if ((err = i2c_detach_client(client))) |
1da177e4 | 431 | return err; |
1da177e4 | 432 | |
943b0830 | 433 | kfree(data); |
1da177e4 LT |
434 | return 0; |
435 | } | |
436 | ||
437 | static struct lm83_data *lm83_update_device(struct device *dev) | |
438 | { | |
439 | struct i2c_client *client = to_i2c_client(dev); | |
440 | struct lm83_data *data = i2c_get_clientdata(client); | |
441 | ||
9a61bf63 | 442 | mutex_lock(&data->update_lock); |
1da177e4 LT |
443 | |
444 | if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { | |
445 | int nr; | |
446 | ||
447 | dev_dbg(&client->dev, "Updating lm83 data.\n"); | |
1a86c051 JD |
448 | for (nr = 0; nr < 9; nr++) { |
449 | data->temp[nr] = | |
1da177e4 LT |
450 | i2c_smbus_read_byte_data(client, |
451 | LM83_REG_R_TEMP[nr]); | |
1da177e4 | 452 | } |
1da177e4 LT |
453 | data->alarms = |
454 | i2c_smbus_read_byte_data(client, LM83_REG_R_STATUS1) | |
455 | + (i2c_smbus_read_byte_data(client, LM83_REG_R_STATUS2) | |
456 | << 8); | |
457 | ||
458 | data->last_updated = jiffies; | |
459 | data->valid = 1; | |
460 | } | |
461 | ||
9a61bf63 | 462 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
463 | |
464 | return data; | |
465 | } | |
466 | ||
467 | static int __init sensors_lm83_init(void) | |
468 | { | |
469 | return i2c_add_driver(&lm83_driver); | |
470 | } | |
471 | ||
472 | static void __exit sensors_lm83_exit(void) | |
473 | { | |
474 | i2c_del_driver(&lm83_driver); | |
475 | } | |
476 | ||
477 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); | |
478 | MODULE_DESCRIPTION("LM83 driver"); | |
479 | MODULE_LICENSE("GPL"); | |
480 | ||
481 | module_init(sensors_lm83_init); | |
482 | module_exit(sensors_lm83_exit); |