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 | ||
25e9c86d MH |
51 | static const unsigned short normal_i2c[] = { |
52 | 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END }; | |
1da177e4 LT |
53 | |
54 | /* | |
55 | * Insmod parameters | |
56 | */ | |
57 | ||
43cb7ebe | 58 | I2C_CLIENT_INSMOD_2(lm83, lm82); |
1da177e4 LT |
59 | |
60 | /* | |
61 | * The LM83 registers | |
62 | * Manufacturer ID is 0x01 for National Semiconductor. | |
63 | */ | |
64 | ||
65 | #define LM83_REG_R_MAN_ID 0xFE | |
66 | #define LM83_REG_R_CHIP_ID 0xFF | |
67 | #define LM83_REG_R_CONFIG 0x03 | |
68 | #define LM83_REG_W_CONFIG 0x09 | |
69 | #define LM83_REG_R_STATUS1 0x02 | |
70 | #define LM83_REG_R_STATUS2 0x35 | |
71 | #define LM83_REG_R_LOCAL_TEMP 0x00 | |
72 | #define LM83_REG_R_LOCAL_HIGH 0x05 | |
73 | #define LM83_REG_W_LOCAL_HIGH 0x0B | |
74 | #define LM83_REG_R_REMOTE1_TEMP 0x30 | |
75 | #define LM83_REG_R_REMOTE1_HIGH 0x38 | |
76 | #define LM83_REG_W_REMOTE1_HIGH 0x50 | |
77 | #define LM83_REG_R_REMOTE2_TEMP 0x01 | |
78 | #define LM83_REG_R_REMOTE2_HIGH 0x07 | |
79 | #define LM83_REG_W_REMOTE2_HIGH 0x0D | |
80 | #define LM83_REG_R_REMOTE3_TEMP 0x31 | |
81 | #define LM83_REG_R_REMOTE3_HIGH 0x3A | |
82 | #define LM83_REG_W_REMOTE3_HIGH 0x52 | |
83 | #define LM83_REG_R_TCRIT 0x42 | |
84 | #define LM83_REG_W_TCRIT 0x5A | |
85 | ||
86 | /* | |
87 | * Conversions and various macros | |
44bbe87e | 88 | * The LM83 uses signed 8-bit values with LSB = 1 degree Celsius. |
1da177e4 LT |
89 | */ |
90 | ||
91 | #define TEMP_FROM_REG(val) ((val) * 1000) | |
92 | #define TEMP_TO_REG(val) ((val) <= -128000 ? -128 : \ | |
93 | (val) >= 127000 ? 127 : \ | |
94 | (val) < 0 ? ((val) - 500) / 1000 : \ | |
95 | ((val) + 500) / 1000) | |
96 | ||
97 | static const u8 LM83_REG_R_TEMP[] = { | |
98 | LM83_REG_R_LOCAL_TEMP, | |
99 | LM83_REG_R_REMOTE1_TEMP, | |
100 | LM83_REG_R_REMOTE2_TEMP, | |
1a86c051 | 101 | LM83_REG_R_REMOTE3_TEMP, |
1da177e4 LT |
102 | LM83_REG_R_LOCAL_HIGH, |
103 | LM83_REG_R_REMOTE1_HIGH, | |
104 | LM83_REG_R_REMOTE2_HIGH, | |
1a86c051 JD |
105 | LM83_REG_R_REMOTE3_HIGH, |
106 | LM83_REG_R_TCRIT, | |
1da177e4 LT |
107 | }; |
108 | ||
109 | static const u8 LM83_REG_W_HIGH[] = { | |
110 | LM83_REG_W_LOCAL_HIGH, | |
111 | LM83_REG_W_REMOTE1_HIGH, | |
112 | LM83_REG_W_REMOTE2_HIGH, | |
1a86c051 JD |
113 | LM83_REG_W_REMOTE3_HIGH, |
114 | LM83_REG_W_TCRIT, | |
1da177e4 LT |
115 | }; |
116 | ||
117 | /* | |
118 | * Functions declaration | |
119 | */ | |
120 | ||
121 | static int lm83_attach_adapter(struct i2c_adapter *adapter); | |
122 | static int lm83_detect(struct i2c_adapter *adapter, int address, int kind); | |
123 | static int lm83_detach_client(struct i2c_client *client); | |
124 | static struct lm83_data *lm83_update_device(struct device *dev); | |
125 | ||
126 | /* | |
127 | * Driver data (common to all clients) | |
128 | */ | |
129 | ||
130 | static struct i2c_driver lm83_driver = { | |
cdaf7934 | 131 | .driver = { |
cdaf7934 LR |
132 | .name = "lm83", |
133 | }, | |
1da177e4 LT |
134 | .attach_adapter = lm83_attach_adapter, |
135 | .detach_client = lm83_detach_client, | |
136 | }; | |
137 | ||
138 | /* | |
139 | * Client data (each client gets its own) | |
140 | */ | |
141 | ||
142 | struct lm83_data { | |
143 | struct i2c_client client; | |
1beeffe4 | 144 | struct device *hwmon_dev; |
9a61bf63 | 145 | struct mutex update_lock; |
1da177e4 LT |
146 | char valid; /* zero until following fields are valid */ |
147 | unsigned long last_updated; /* in jiffies */ | |
148 | ||
149 | /* registers values */ | |
1a86c051 JD |
150 | s8 temp[9]; /* 0..3: input 1-4, |
151 | 4..7: high limit 1-4, | |
152 | 8 : critical limit */ | |
1da177e4 LT |
153 | u16 alarms; /* bitvector, combined */ |
154 | }; | |
155 | ||
156 | /* | |
157 | * Sysfs stuff | |
158 | */ | |
159 | ||
1a86c051 JD |
160 | static ssize_t show_temp(struct device *dev, struct device_attribute *devattr, |
161 | char *buf) | |
162 | { | |
163 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
164 | struct lm83_data *data = lm83_update_device(dev); | |
165 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index])); | |
1da177e4 | 166 | } |
1a86c051 JD |
167 | |
168 | static ssize_t set_temp(struct device *dev, struct device_attribute *devattr, | |
169 | const char *buf, size_t count) | |
170 | { | |
171 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
172 | struct i2c_client *client = to_i2c_client(dev); | |
173 | struct lm83_data *data = i2c_get_clientdata(client); | |
174 | long val = simple_strtol(buf, NULL, 10); | |
175 | int nr = attr->index; | |
176 | ||
9a61bf63 | 177 | mutex_lock(&data->update_lock); |
1a86c051 JD |
178 | data->temp[nr] = TEMP_TO_REG(val); |
179 | i2c_smbus_write_byte_data(client, LM83_REG_W_HIGH[nr - 4], | |
180 | data->temp[nr]); | |
9a61bf63 | 181 | mutex_unlock(&data->update_lock); |
1a86c051 | 182 | return count; |
1da177e4 | 183 | } |
1da177e4 | 184 | |
1a86c051 JD |
185 | static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, |
186 | char *buf) | |
1da177e4 LT |
187 | { |
188 | struct lm83_data *data = lm83_update_device(dev); | |
189 | return sprintf(buf, "%d\n", data->alarms); | |
190 | } | |
191 | ||
2d45771e JD |
192 | static ssize_t show_alarm(struct device *dev, struct device_attribute |
193 | *devattr, char *buf) | |
194 | { | |
195 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
196 | struct lm83_data *data = lm83_update_device(dev); | |
197 | int bitnr = attr->index; | |
198 | ||
199 | return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1); | |
200 | } | |
201 | ||
1a86c051 JD |
202 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); |
203 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); | |
204 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); | |
205 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); | |
206 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp, | |
207 | set_temp, 4); | |
208 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp, | |
209 | set_temp, 5); | |
210 | static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp, | |
211 | set_temp, 6); | |
212 | static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp, | |
213 | set_temp, 7); | |
214 | static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp, NULL, 8); | |
215 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp, NULL, 8); | |
216 | static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp, | |
217 | set_temp, 8); | |
218 | static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp, NULL, 8); | |
2d45771e JD |
219 | |
220 | /* Individual alarm files */ | |
221 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0); | |
222 | static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 1); | |
7817a39e | 223 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2); |
2d45771e JD |
224 | static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 4); |
225 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); | |
226 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 8); | |
227 | static SENSOR_DEVICE_ATTR(temp4_crit_alarm, S_IRUGO, show_alarm, NULL, 9); | |
7817a39e | 228 | static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_alarm, NULL, 10); |
2d45771e | 229 | static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_alarm, NULL, 12); |
7817a39e | 230 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 13); |
2d45771e JD |
231 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 15); |
232 | /* Raw alarm file for compatibility */ | |
1da177e4 LT |
233 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
234 | ||
0e39e01c JD |
235 | static struct attribute *lm83_attributes[] = { |
236 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
237 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
238 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
239 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
240 | &sensor_dev_attr_temp1_crit.dev_attr.attr, | |
241 | &sensor_dev_attr_temp3_crit.dev_attr.attr, | |
242 | ||
243 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
244 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, | |
7817a39e | 245 | &sensor_dev_attr_temp3_fault.dev_attr.attr, |
0e39e01c JD |
246 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, |
247 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
248 | &dev_attr_alarms.attr, | |
249 | NULL | |
250 | }; | |
251 | ||
252 | static const struct attribute_group lm83_group = { | |
253 | .attrs = lm83_attributes, | |
254 | }; | |
255 | ||
256 | static struct attribute *lm83_attributes_opt[] = { | |
257 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
258 | &sensor_dev_attr_temp4_input.dev_attr.attr, | |
259 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
260 | &sensor_dev_attr_temp4_max.dev_attr.attr, | |
261 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
262 | &sensor_dev_attr_temp4_crit.dev_attr.attr, | |
263 | ||
264 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
265 | &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, | |
7817a39e | 266 | &sensor_dev_attr_temp4_fault.dev_attr.attr, |
0e39e01c | 267 | &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, |
7817a39e | 268 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
0e39e01c JD |
269 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, |
270 | NULL | |
271 | }; | |
272 | ||
273 | static const struct attribute_group lm83_group_opt = { | |
274 | .attrs = lm83_attributes_opt, | |
275 | }; | |
276 | ||
1da177e4 LT |
277 | /* |
278 | * Real code | |
279 | */ | |
280 | ||
281 | static int lm83_attach_adapter(struct i2c_adapter *adapter) | |
282 | { | |
283 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
284 | return 0; | |
2ed2dc3c | 285 | return i2c_probe(adapter, &addr_data, lm83_detect); |
1da177e4 LT |
286 | } |
287 | ||
288 | /* | |
289 | * The following function does more than just detection. If detection | |
290 | * succeeds, it also registers the new chip. | |
291 | */ | |
292 | static int lm83_detect(struct i2c_adapter *adapter, int address, int kind) | |
293 | { | |
294 | struct i2c_client *new_client; | |
295 | struct lm83_data *data; | |
296 | int err = 0; | |
297 | const char *name = ""; | |
298 | ||
299 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
300 | goto exit; | |
301 | ||
ba9c2e8d | 302 | if (!(data = kzalloc(sizeof(struct lm83_data), GFP_KERNEL))) { |
1da177e4 LT |
303 | err = -ENOMEM; |
304 | goto exit; | |
305 | } | |
1da177e4 LT |
306 | |
307 | /* The common I2C client data is placed right after the | |
308 | * LM83-specific data. */ | |
309 | new_client = &data->client; | |
310 | i2c_set_clientdata(new_client, data); | |
311 | new_client->addr = address; | |
312 | new_client->adapter = adapter; | |
313 | new_client->driver = &lm83_driver; | |
314 | new_client->flags = 0; | |
315 | ||
316 | /* Now we do the detection and identification. A negative kind | |
317 | * means that the driver was loaded with no force parameter | |
318 | * (default), so we must both detect and identify the chip | |
319 | * (actually there is only one possible kind of chip for now, LM83). | |
320 | * A zero kind means that the driver was loaded with the force | |
321 | * parameter, the detection step shall be skipped. A positive kind | |
322 | * means that the driver was loaded with the force parameter and a | |
323 | * given kind of chip is requested, so both the detection and the | |
324 | * identification steps are skipped. */ | |
325 | ||
326 | /* Default to an LM83 if forced */ | |
327 | if (kind == 0) | |
328 | kind = lm83; | |
329 | ||
330 | if (kind < 0) { /* detection */ | |
331 | if (((i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS1) | |
332 | & 0xA8) != 0x00) || | |
333 | ((i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS2) | |
334 | & 0x48) != 0x00) || | |
335 | ((i2c_smbus_read_byte_data(new_client, LM83_REG_R_CONFIG) | |
336 | & 0x41) != 0x00)) { | |
337 | dev_dbg(&adapter->dev, | |
338 | "LM83 detection failed at 0x%02x.\n", address); | |
339 | goto exit_free; | |
340 | } | |
341 | } | |
342 | ||
343 | if (kind <= 0) { /* identification */ | |
344 | u8 man_id, chip_id; | |
345 | ||
346 | man_id = i2c_smbus_read_byte_data(new_client, | |
347 | LM83_REG_R_MAN_ID); | |
348 | chip_id = i2c_smbus_read_byte_data(new_client, | |
349 | LM83_REG_R_CHIP_ID); | |
350 | ||
351 | if (man_id == 0x01) { /* National Semiconductor */ | |
352 | if (chip_id == 0x03) { | |
353 | kind = lm83; | |
43cb7ebe JC |
354 | } else |
355 | if (chip_id == 0x01) { | |
356 | kind = lm82; | |
1da177e4 LT |
357 | } |
358 | } | |
359 | ||
360 | if (kind <= 0) { /* identification failed */ | |
361 | dev_info(&adapter->dev, | |
362 | "Unsupported chip (man_id=0x%02X, " | |
363 | "chip_id=0x%02X).\n", man_id, chip_id); | |
364 | goto exit_free; | |
365 | } | |
366 | } | |
367 | ||
368 | if (kind == lm83) { | |
369 | name = "lm83"; | |
43cb7ebe JC |
370 | } else |
371 | if (kind == lm82) { | |
372 | name = "lm82"; | |
1da177e4 LT |
373 | } |
374 | ||
375 | /* We can fill in the remaining client fields */ | |
376 | strlcpy(new_client->name, name, I2C_NAME_SIZE); | |
377 | data->valid = 0; | |
9a61bf63 | 378 | mutex_init(&data->update_lock); |
1da177e4 LT |
379 | |
380 | /* Tell the I2C layer a new client has arrived */ | |
381 | if ((err = i2c_attach_client(new_client))) | |
382 | goto exit_free; | |
383 | ||
384 | /* | |
0e39e01c | 385 | * Register sysfs hooks |
43cb7ebe JC |
386 | * The LM82 can only monitor one external diode which is |
387 | * at the same register as the LM83 temp3 entry - so we | |
388 | * declare 1 and 3 common, and then 2 and 4 only for the LM83. | |
389 | */ | |
390 | ||
0e39e01c JD |
391 | if ((err = sysfs_create_group(&new_client->dev.kobj, &lm83_group))) |
392 | goto exit_detach; | |
1da177e4 | 393 | |
43cb7ebe | 394 | if (kind == lm83) { |
0e39e01c JD |
395 | if ((err = sysfs_create_group(&new_client->dev.kobj, |
396 | &lm83_group_opt))) | |
397 | goto exit_remove_files; | |
398 | } | |
399 | ||
1beeffe4 TJ |
400 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
401 | if (IS_ERR(data->hwmon_dev)) { | |
402 | err = PTR_ERR(data->hwmon_dev); | |
0e39e01c | 403 | goto exit_remove_files; |
43cb7ebe JC |
404 | } |
405 | ||
1da177e4 LT |
406 | return 0; |
407 | ||
0e39e01c JD |
408 | exit_remove_files: |
409 | sysfs_remove_group(&new_client->dev.kobj, &lm83_group); | |
410 | sysfs_remove_group(&new_client->dev.kobj, &lm83_group_opt); | |
943b0830 MH |
411 | exit_detach: |
412 | i2c_detach_client(new_client); | |
1da177e4 LT |
413 | exit_free: |
414 | kfree(data); | |
415 | exit: | |
416 | return err; | |
417 | } | |
418 | ||
419 | static int lm83_detach_client(struct i2c_client *client) | |
420 | { | |
943b0830 | 421 | struct lm83_data *data = i2c_get_clientdata(client); |
1da177e4 LT |
422 | int err; |
423 | ||
1beeffe4 | 424 | hwmon_device_unregister(data->hwmon_dev); |
0e39e01c JD |
425 | sysfs_remove_group(&client->dev.kobj, &lm83_group); |
426 | sysfs_remove_group(&client->dev.kobj, &lm83_group_opt); | |
943b0830 | 427 | |
7bef5594 | 428 | if ((err = i2c_detach_client(client))) |
1da177e4 | 429 | return err; |
1da177e4 | 430 | |
943b0830 | 431 | kfree(data); |
1da177e4 LT |
432 | return 0; |
433 | } | |
434 | ||
435 | static struct lm83_data *lm83_update_device(struct device *dev) | |
436 | { | |
437 | struct i2c_client *client = to_i2c_client(dev); | |
438 | struct lm83_data *data = i2c_get_clientdata(client); | |
439 | ||
9a61bf63 | 440 | mutex_lock(&data->update_lock); |
1da177e4 LT |
441 | |
442 | if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { | |
443 | int nr; | |
444 | ||
445 | dev_dbg(&client->dev, "Updating lm83 data.\n"); | |
1a86c051 JD |
446 | for (nr = 0; nr < 9; nr++) { |
447 | data->temp[nr] = | |
1da177e4 LT |
448 | i2c_smbus_read_byte_data(client, |
449 | LM83_REG_R_TEMP[nr]); | |
1da177e4 | 450 | } |
1da177e4 LT |
451 | data->alarms = |
452 | i2c_smbus_read_byte_data(client, LM83_REG_R_STATUS1) | |
453 | + (i2c_smbus_read_byte_data(client, LM83_REG_R_STATUS2) | |
454 | << 8); | |
455 | ||
456 | data->last_updated = jiffies; | |
457 | data->valid = 1; | |
458 | } | |
459 | ||
9a61bf63 | 460 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
461 | |
462 | return data; | |
463 | } | |
464 | ||
465 | static int __init sensors_lm83_init(void) | |
466 | { | |
467 | return i2c_add_driver(&lm83_driver); | |
468 | } | |
469 | ||
470 | static void __exit sensors_lm83_exit(void) | |
471 | { | |
472 | i2c_del_driver(&lm83_driver); | |
473 | } | |
474 | ||
475 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); | |
476 | MODULE_DESCRIPTION("LM83 driver"); | |
477 | MODULE_LICENSE("GPL"); | |
478 | ||
479 | module_init(sensors_lm83_init); | |
480 | module_exit(sensors_lm83_exit); |