Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * lm90.c - Part of lm_sensors, Linux kernel modules for hardware | |
3 | * monitoring | |
6388a388 | 4 | * Copyright (C) 2003-2008 Jean Delvare <khali@linux-fr.org> |
1da177e4 LT |
5 | * |
6 | * Based on the lm83 driver. The LM90 is a sensor chip made by National | |
7 | * Semiconductor. It reports up to two temperatures (its own plus up to | |
8 | * one external one) with a 0.125 deg resolution (1 deg for local | |
a874a10c | 9 | * temperature) and a 3-4 deg accuracy. |
1da177e4 LT |
10 | * |
11 | * This driver also supports the LM89 and LM99, two other sensor chips | |
12 | * made by National Semiconductor. Both have an increased remote | |
13 | * temperature measurement accuracy (1 degree), and the LM99 | |
14 | * additionally shifts remote temperatures (measured and limits) by 16 | |
15 | * degrees, which allows for higher temperatures measurement. The | |
16 | * driver doesn't handle it since it can be done easily in user-space. | |
44bbe87e | 17 | * Note that there is no way to differentiate between both chips. |
1da177e4 LT |
18 | * |
19 | * This driver also supports the LM86, another sensor chip made by | |
20 | * National Semiconductor. It is exactly similar to the LM90 except it | |
21 | * has a higher accuracy. | |
1da177e4 LT |
22 | * |
23 | * This driver also supports the ADM1032, a sensor chip made by Analog | |
24 | * Devices. That chip is similar to the LM90, with a few differences | |
a874a10c JD |
25 | * that are not handled by this driver. Among others, it has a higher |
26 | * accuracy than the LM90, much like the LM86 does. | |
1da177e4 LT |
27 | * |
28 | * This driver also supports the MAX6657, MAX6658 and MAX6659 sensor | |
a874a10c | 29 | * chips made by Maxim. These chips are similar to the LM86. |
44bbe87e | 30 | * Note that there is no easy way to differentiate between the three |
1da177e4 | 31 | * variants. The extra address and features of the MAX6659 are not |
69f2f96d JD |
32 | * supported by this driver. These chips lack the remote temperature |
33 | * offset feature. | |
1da177e4 | 34 | * |
32c82a93 RB |
35 | * This driver also supports the MAX6680 and MAX6681, two other sensor |
36 | * chips made by Maxim. These are quite similar to the other Maxim | |
a874a10c JD |
37 | * chips. The MAX6680 and MAX6681 only differ in the pinout so they can |
38 | * be treated identically. | |
32c82a93 | 39 | * |
23b2d477 NC |
40 | * This driver also supports the ADT7461 chip from Analog Devices. |
41 | * It's supported in both compatibility and extended mode. It is mostly | |
42 | * compatible with LM90 except for a data format difference for the | |
43 | * temperature value registers. | |
1da177e4 LT |
44 | * |
45 | * Since the LM90 was the first chipset supported by this driver, most | |
46 | * comments will refer to this chipset, but are actually general and | |
47 | * concern all supported chipsets, unless mentioned otherwise. | |
48 | * | |
49 | * This program is free software; you can redistribute it and/or modify | |
50 | * it under the terms of the GNU General Public License as published by | |
51 | * the Free Software Foundation; either version 2 of the License, or | |
52 | * (at your option) any later version. | |
53 | * | |
54 | * This program is distributed in the hope that it will be useful, | |
55 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
56 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
57 | * GNU General Public License for more details. | |
58 | * | |
59 | * You should have received a copy of the GNU General Public License | |
60 | * along with this program; if not, write to the Free Software | |
61 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
62 | */ | |
63 | ||
1da177e4 LT |
64 | #include <linux/module.h> |
65 | #include <linux/init.h> | |
66 | #include <linux/slab.h> | |
67 | #include <linux/jiffies.h> | |
68 | #include <linux/i2c.h> | |
10c08f81 | 69 | #include <linux/hwmon-sysfs.h> |
943b0830 MH |
70 | #include <linux/hwmon.h> |
71 | #include <linux/err.h> | |
9a61bf63 | 72 | #include <linux/mutex.h> |
0e39e01c | 73 | #include <linux/sysfs.h> |
1da177e4 LT |
74 | |
75 | /* | |
76 | * Addresses to scan | |
77 | * Address is fully defined internally and cannot be changed except for | |
32c82a93 | 78 | * MAX6659, MAX6680 and MAX6681. |
90209b42 JD |
79 | * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, MAX6657 and MAX6658 |
80 | * have address 0x4c. | |
81 | * ADM1032-2, ADT7461-2, LM89-1, and LM99-1 have address 0x4d. | |
1da177e4 | 82 | * MAX6659 can have address 0x4c, 0x4d or 0x4e (unsupported). |
32c82a93 RB |
83 | * MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, |
84 | * 0x4c, 0x4d or 0x4e. | |
1da177e4 LT |
85 | */ |
86 | ||
25e9c86d MH |
87 | static const unsigned short normal_i2c[] = { |
88 | 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END }; | |
1da177e4 LT |
89 | |
90 | /* | |
91 | * Insmod parameters | |
92 | */ | |
93 | ||
32c82a93 | 94 | I2C_CLIENT_INSMOD_7(lm90, adm1032, lm99, lm86, max6657, adt7461, max6680); |
1da177e4 LT |
95 | |
96 | /* | |
97 | * The LM90 registers | |
98 | */ | |
99 | ||
100 | #define LM90_REG_R_MAN_ID 0xFE | |
101 | #define LM90_REG_R_CHIP_ID 0xFF | |
102 | #define LM90_REG_R_CONFIG1 0x03 | |
103 | #define LM90_REG_W_CONFIG1 0x09 | |
104 | #define LM90_REG_R_CONFIG2 0xBF | |
105 | #define LM90_REG_W_CONFIG2 0xBF | |
106 | #define LM90_REG_R_CONVRATE 0x04 | |
107 | #define LM90_REG_W_CONVRATE 0x0A | |
108 | #define LM90_REG_R_STATUS 0x02 | |
109 | #define LM90_REG_R_LOCAL_TEMP 0x00 | |
110 | #define LM90_REG_R_LOCAL_HIGH 0x05 | |
111 | #define LM90_REG_W_LOCAL_HIGH 0x0B | |
112 | #define LM90_REG_R_LOCAL_LOW 0x06 | |
113 | #define LM90_REG_W_LOCAL_LOW 0x0C | |
114 | #define LM90_REG_R_LOCAL_CRIT 0x20 | |
115 | #define LM90_REG_W_LOCAL_CRIT 0x20 | |
116 | #define LM90_REG_R_REMOTE_TEMPH 0x01 | |
117 | #define LM90_REG_R_REMOTE_TEMPL 0x10 | |
118 | #define LM90_REG_R_REMOTE_OFFSH 0x11 | |
119 | #define LM90_REG_W_REMOTE_OFFSH 0x11 | |
120 | #define LM90_REG_R_REMOTE_OFFSL 0x12 | |
121 | #define LM90_REG_W_REMOTE_OFFSL 0x12 | |
122 | #define LM90_REG_R_REMOTE_HIGHH 0x07 | |
123 | #define LM90_REG_W_REMOTE_HIGHH 0x0D | |
124 | #define LM90_REG_R_REMOTE_HIGHL 0x13 | |
125 | #define LM90_REG_W_REMOTE_HIGHL 0x13 | |
126 | #define LM90_REG_R_REMOTE_LOWH 0x08 | |
127 | #define LM90_REG_W_REMOTE_LOWH 0x0E | |
128 | #define LM90_REG_R_REMOTE_LOWL 0x14 | |
129 | #define LM90_REG_W_REMOTE_LOWL 0x14 | |
130 | #define LM90_REG_R_REMOTE_CRIT 0x19 | |
131 | #define LM90_REG_W_REMOTE_CRIT 0x19 | |
132 | #define LM90_REG_R_TCRIT_HYST 0x21 | |
133 | #define LM90_REG_W_TCRIT_HYST 0x21 | |
134 | ||
f65e1708 JD |
135 | /* MAX6657-specific registers */ |
136 | ||
137 | #define MAX6657_REG_R_LOCAL_TEMPL 0x11 | |
138 | ||
23b2d477 NC |
139 | /* |
140 | * Device flags | |
141 | */ | |
142 | #define LM90_FLAG_ADT7461_EXT 0x01 /* ADT7461 extended mode */ | |
143 | ||
1da177e4 LT |
144 | /* |
145 | * Functions declaration | |
146 | */ | |
147 | ||
9b0e8526 JD |
148 | static int lm90_detect(struct i2c_client *client, int kind, |
149 | struct i2c_board_info *info); | |
150 | static int lm90_probe(struct i2c_client *client, | |
151 | const struct i2c_device_id *id); | |
1da177e4 | 152 | static void lm90_init_client(struct i2c_client *client); |
9b0e8526 | 153 | static int lm90_remove(struct i2c_client *client); |
1da177e4 LT |
154 | static struct lm90_data *lm90_update_device(struct device *dev); |
155 | ||
156 | /* | |
157 | * Driver data (common to all clients) | |
158 | */ | |
159 | ||
9b0e8526 JD |
160 | static const struct i2c_device_id lm90_id[] = { |
161 | { "adm1032", adm1032 }, | |
162 | { "adt7461", adt7461 }, | |
163 | { "lm90", lm90 }, | |
164 | { "lm86", lm86 }, | |
165 | { "lm89", lm99 }, | |
166 | { "lm99", lm99 }, /* Missing temperature offset */ | |
167 | { "max6657", max6657 }, | |
168 | { "max6658", max6657 }, | |
169 | { "max6659", max6657 }, | |
170 | { "max6680", max6680 }, | |
171 | { "max6681", max6680 }, | |
172 | { } | |
173 | }; | |
174 | MODULE_DEVICE_TABLE(i2c, lm90_id); | |
175 | ||
1da177e4 | 176 | static struct i2c_driver lm90_driver = { |
9b0e8526 | 177 | .class = I2C_CLASS_HWMON, |
cdaf7934 | 178 | .driver = { |
cdaf7934 LR |
179 | .name = "lm90", |
180 | }, | |
9b0e8526 JD |
181 | .probe = lm90_probe, |
182 | .remove = lm90_remove, | |
183 | .id_table = lm90_id, | |
184 | .detect = lm90_detect, | |
185 | .address_data = &addr_data, | |
1da177e4 LT |
186 | }; |
187 | ||
188 | /* | |
189 | * Client data (each client gets its own) | |
190 | */ | |
191 | ||
192 | struct lm90_data { | |
1beeffe4 | 193 | struct device *hwmon_dev; |
9a61bf63 | 194 | struct mutex update_lock; |
1da177e4 LT |
195 | char valid; /* zero until following fields are valid */ |
196 | unsigned long last_updated; /* in jiffies */ | |
197 | int kind; | |
23b2d477 | 198 | int flags; |
1da177e4 LT |
199 | |
200 | /* registers values */ | |
f65e1708 JD |
201 | s8 temp8[4]; /* 0: local low limit |
202 | 1: local high limit | |
203 | 2: local critical limit | |
204 | 3: remote critical limit */ | |
205 | s16 temp11[5]; /* 0: remote input | |
30d7394b | 206 | 1: remote low limit |
69f2f96d | 207 | 2: remote high limit |
f65e1708 JD |
208 | 3: remote offset (except max6657) |
209 | 4: local input */ | |
1da177e4 LT |
210 | u8 temp_hyst; |
211 | u8 alarms; /* bitvector */ | |
212 | }; | |
213 | ||
cea50fe2 NC |
214 | /* |
215 | * Conversions | |
216 | * For local temperatures and limits, critical limits and the hysteresis | |
217 | * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius. | |
218 | * For remote temperatures and limits, it uses signed 11-bit values with | |
219 | * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. | |
220 | */ | |
221 | ||
9d4d3834 | 222 | static inline int temp_from_s8(s8 val) |
cea50fe2 NC |
223 | { |
224 | return val * 1000; | |
225 | } | |
226 | ||
9d4d3834 | 227 | static inline int temp_from_s16(s16 val) |
cea50fe2 NC |
228 | { |
229 | return val / 32 * 125; | |
230 | } | |
231 | ||
9d4d3834 | 232 | static s8 temp_to_s8(long val) |
cea50fe2 NC |
233 | { |
234 | if (val <= -128000) | |
235 | return -128; | |
236 | if (val >= 127000) | |
237 | return 127; | |
238 | if (val < 0) | |
239 | return (val - 500) / 1000; | |
240 | return (val + 500) / 1000; | |
241 | } | |
242 | ||
9d4d3834 | 243 | static s16 temp_to_s16(long val) |
cea50fe2 NC |
244 | { |
245 | if (val <= -128000) | |
246 | return 0x8000; | |
247 | if (val >= 127875) | |
248 | return 0x7FE0; | |
249 | if (val < 0) | |
250 | return (val - 62) / 125 * 32; | |
251 | return (val + 62) / 125 * 32; | |
252 | } | |
253 | ||
254 | static u8 hyst_to_reg(long val) | |
255 | { | |
256 | if (val <= 0) | |
257 | return 0; | |
258 | if (val >= 30500) | |
259 | return 31; | |
260 | return (val + 500) / 1000; | |
261 | } | |
262 | ||
263 | /* | |
23b2d477 NC |
264 | * ADT7461 in compatibility mode is almost identical to LM90 except that |
265 | * attempts to write values that are outside the range 0 < temp < 127 are | |
266 | * treated as the boundary value. | |
267 | * | |
268 | * ADT7461 in "extended mode" operation uses unsigned integers offset by | |
269 | * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC. | |
cea50fe2 | 270 | */ |
9d4d3834 | 271 | static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val) |
cea50fe2 | 272 | { |
23b2d477 NC |
273 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
274 | return (val - 64) * 1000; | |
275 | else | |
9d4d3834 | 276 | return temp_from_s8(val); |
cea50fe2 NC |
277 | } |
278 | ||
9d4d3834 | 279 | static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val) |
cea50fe2 | 280 | { |
23b2d477 NC |
281 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
282 | return (val - 0x4000) / 64 * 250; | |
283 | else | |
9d4d3834 | 284 | return temp_from_s16(val); |
23b2d477 NC |
285 | } |
286 | ||
9d4d3834 | 287 | static u8 temp_to_u8_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
288 | { |
289 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
290 | if (val <= -64000) | |
291 | return 0; | |
292 | if (val >= 191000) | |
293 | return 0xFF; | |
294 | return (val + 500 + 64000) / 1000; | |
295 | } else { | |
296 | if (val <= 0) | |
297 | return 0; | |
298 | if (val >= 127000) | |
299 | return 127; | |
300 | return (val + 500) / 1000; | |
301 | } | |
302 | } | |
303 | ||
9d4d3834 | 304 | static u16 temp_to_u16_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
305 | { |
306 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
307 | if (val <= -64000) | |
308 | return 0; | |
309 | if (val >= 191750) | |
310 | return 0xFFC0; | |
311 | return (val + 64000 + 125) / 250 * 64; | |
312 | } else { | |
313 | if (val <= 0) | |
314 | return 0; | |
315 | if (val >= 127750) | |
316 | return 0x7FC0; | |
317 | return (val + 125) / 250 * 64; | |
318 | } | |
cea50fe2 NC |
319 | } |
320 | ||
1da177e4 LT |
321 | /* |
322 | * Sysfs stuff | |
323 | */ | |
324 | ||
30d7394b JD |
325 | static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr, |
326 | char *buf) | |
327 | { | |
328 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
329 | struct lm90_data *data = lm90_update_device(dev); | |
23b2d477 NC |
330 | int temp; |
331 | ||
332 | if (data->kind == adt7461) | |
9d4d3834 | 333 | temp = temp_from_u8_adt7461(data, data->temp8[attr->index]); |
23b2d477 | 334 | else |
9d4d3834 | 335 | temp = temp_from_s8(data->temp8[attr->index]); |
23b2d477 NC |
336 | |
337 | return sprintf(buf, "%d\n", temp); | |
30d7394b JD |
338 | } |
339 | ||
340 | static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, | |
341 | const char *buf, size_t count) | |
342 | { | |
343 | static const u8 reg[4] = { | |
344 | LM90_REG_W_LOCAL_LOW, | |
345 | LM90_REG_W_LOCAL_HIGH, | |
346 | LM90_REG_W_LOCAL_CRIT, | |
347 | LM90_REG_W_REMOTE_CRIT, | |
348 | }; | |
349 | ||
350 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
351 | struct i2c_client *client = to_i2c_client(dev); | |
352 | struct lm90_data *data = i2c_get_clientdata(client); | |
353 | long val = simple_strtol(buf, NULL, 10); | |
354 | int nr = attr->index; | |
355 | ||
9a61bf63 | 356 | mutex_lock(&data->update_lock); |
30d7394b | 357 | if (data->kind == adt7461) |
9d4d3834 | 358 | data->temp8[nr] = temp_to_u8_adt7461(data, val); |
30d7394b | 359 | else |
9d4d3834 | 360 | data->temp8[nr] = temp_to_s8(val); |
f65e1708 | 361 | i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]); |
9a61bf63 | 362 | mutex_unlock(&data->update_lock); |
30d7394b | 363 | return count; |
1da177e4 | 364 | } |
30d7394b JD |
365 | |
366 | static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, | |
367 | char *buf) | |
368 | { | |
369 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
370 | struct lm90_data *data = lm90_update_device(dev); | |
23b2d477 NC |
371 | int temp; |
372 | ||
373 | if (data->kind == adt7461) | |
9d4d3834 | 374 | temp = temp_from_u16_adt7461(data, data->temp11[attr->index]); |
23b2d477 | 375 | else |
9d4d3834 | 376 | temp = temp_from_s16(data->temp11[attr->index]); |
23b2d477 NC |
377 | |
378 | return sprintf(buf, "%d\n", temp); | |
1da177e4 | 379 | } |
30d7394b JD |
380 | |
381 | static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, | |
382 | const char *buf, size_t count) | |
383 | { | |
69f2f96d | 384 | static const u8 reg[6] = { |
30d7394b JD |
385 | LM90_REG_W_REMOTE_LOWH, |
386 | LM90_REG_W_REMOTE_LOWL, | |
387 | LM90_REG_W_REMOTE_HIGHH, | |
388 | LM90_REG_W_REMOTE_HIGHL, | |
69f2f96d JD |
389 | LM90_REG_W_REMOTE_OFFSH, |
390 | LM90_REG_W_REMOTE_OFFSL, | |
30d7394b JD |
391 | }; |
392 | ||
393 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
394 | struct i2c_client *client = to_i2c_client(dev); | |
395 | struct lm90_data *data = i2c_get_clientdata(client); | |
396 | long val = simple_strtol(buf, NULL, 10); | |
397 | int nr = attr->index; | |
398 | ||
9a61bf63 | 399 | mutex_lock(&data->update_lock); |
30d7394b | 400 | if (data->kind == adt7461) |
9d4d3834 | 401 | data->temp11[nr] = temp_to_u16_adt7461(data, val); |
5f502a83 | 402 | else if (data->kind == max6657 || data->kind == max6680) |
9d4d3834 | 403 | data->temp11[nr] = temp_to_s8(val) << 8; |
30d7394b | 404 | else |
9d4d3834 | 405 | data->temp11[nr] = temp_to_s16(val); |
5f502a83 | 406 | |
30d7394b JD |
407 | i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], |
408 | data->temp11[nr] >> 8); | |
5f502a83 JD |
409 | if (data->kind != max6657 && data->kind != max6680) |
410 | i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], | |
411 | data->temp11[nr] & 0xff); | |
9a61bf63 | 412 | mutex_unlock(&data->update_lock); |
30d7394b | 413 | return count; |
1da177e4 | 414 | } |
30d7394b JD |
415 | |
416 | static ssize_t show_temphyst(struct device *dev, struct device_attribute *devattr, | |
417 | char *buf) | |
418 | { | |
419 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
420 | struct lm90_data *data = lm90_update_device(dev); | |
23b2d477 NC |
421 | int temp; |
422 | ||
423 | if (data->kind == adt7461) | |
9d4d3834 | 424 | temp = temp_from_u8_adt7461(data, data->temp8[attr->index]); |
23b2d477 | 425 | else |
9d4d3834 | 426 | temp = temp_from_s8(data->temp8[attr->index]); |
23b2d477 | 427 | |
9d4d3834 | 428 | return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst)); |
1da177e4 | 429 | } |
1da177e4 | 430 | |
30d7394b JD |
431 | static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy, |
432 | const char *buf, size_t count) | |
1da177e4 LT |
433 | { |
434 | struct i2c_client *client = to_i2c_client(dev); | |
435 | struct lm90_data *data = i2c_get_clientdata(client); | |
436 | long val = simple_strtol(buf, NULL, 10); | |
437 | long hyst; | |
438 | ||
9a61bf63 | 439 | mutex_lock(&data->update_lock); |
9d4d3834 | 440 | hyst = temp_from_s8(data->temp8[2]) - val; |
1da177e4 | 441 | i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST, |
cea50fe2 | 442 | hyst_to_reg(hyst)); |
9a61bf63 | 443 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
444 | return count; |
445 | } | |
446 | ||
30d7394b JD |
447 | static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, |
448 | char *buf) | |
1da177e4 LT |
449 | { |
450 | struct lm90_data *data = lm90_update_device(dev); | |
451 | return sprintf(buf, "%d\n", data->alarms); | |
452 | } | |
453 | ||
2d45771e JD |
454 | static ssize_t show_alarm(struct device *dev, struct device_attribute |
455 | *devattr, char *buf) | |
456 | { | |
457 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
458 | struct lm90_data *data = lm90_update_device(dev); | |
459 | int bitnr = attr->index; | |
460 | ||
461 | return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1); | |
462 | } | |
463 | ||
f65e1708 | 464 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp11, NULL, 4); |
30d7394b JD |
465 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); |
466 | static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8, | |
f65e1708 | 467 | set_temp8, 0); |
30d7394b JD |
468 | static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, |
469 | set_temp11, 1); | |
470 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8, | |
f65e1708 | 471 | set_temp8, 1); |
30d7394b JD |
472 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, |
473 | set_temp11, 2); | |
474 | static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8, | |
f65e1708 | 475 | set_temp8, 2); |
30d7394b | 476 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8, |
f65e1708 | 477 | set_temp8, 3); |
30d7394b | 478 | static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst, |
f65e1708 JD |
479 | set_temphyst, 2); |
480 | static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, 3); | |
69f2f96d JD |
481 | static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, |
482 | set_temp11, 3); | |
2d45771e JD |
483 | |
484 | /* Individual alarm files */ | |
485 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0); | |
486 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); | |
7817a39e | 487 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); |
2d45771e JD |
488 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); |
489 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); | |
490 | static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5); | |
491 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); | |
492 | /* Raw alarm file for compatibility */ | |
1da177e4 LT |
493 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
494 | ||
0e39e01c JD |
495 | static struct attribute *lm90_attributes[] = { |
496 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
497 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
498 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
499 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
500 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
501 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
502 | &sensor_dev_attr_temp1_crit.dev_attr.attr, | |
503 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
504 | &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, | |
505 | &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, | |
506 | ||
507 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
508 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
7817a39e | 509 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
0e39e01c JD |
510 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
511 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
512 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, | |
513 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
514 | &dev_attr_alarms.attr, | |
515 | NULL | |
516 | }; | |
517 | ||
518 | static const struct attribute_group lm90_group = { | |
519 | .attrs = lm90_attributes, | |
520 | }; | |
521 | ||
c3df5806 JD |
522 | /* pec used for ADM1032 only */ |
523 | static ssize_t show_pec(struct device *dev, struct device_attribute *dummy, | |
524 | char *buf) | |
525 | { | |
526 | struct i2c_client *client = to_i2c_client(dev); | |
527 | return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC)); | |
528 | } | |
529 | ||
530 | static ssize_t set_pec(struct device *dev, struct device_attribute *dummy, | |
531 | const char *buf, size_t count) | |
532 | { | |
533 | struct i2c_client *client = to_i2c_client(dev); | |
534 | long val = simple_strtol(buf, NULL, 10); | |
535 | ||
536 | switch (val) { | |
537 | case 0: | |
538 | client->flags &= ~I2C_CLIENT_PEC; | |
539 | break; | |
540 | case 1: | |
541 | client->flags |= I2C_CLIENT_PEC; | |
542 | break; | |
543 | default: | |
544 | return -EINVAL; | |
545 | } | |
546 | ||
547 | return count; | |
548 | } | |
549 | ||
550 | static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec); | |
551 | ||
1da177e4 LT |
552 | /* |
553 | * Real code | |
554 | */ | |
555 | ||
c3df5806 | 556 | /* The ADM1032 supports PEC but not on write byte transactions, so we need |
0966415d | 557 | to explicitly ask for a transaction without PEC. */ |
c3df5806 JD |
558 | static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value) |
559 | { | |
560 | return i2c_smbus_xfer(client->adapter, client->addr, | |
561 | client->flags & ~I2C_CLIENT_PEC, | |
562 | I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL); | |
563 | } | |
564 | ||
565 | /* It is assumed that client->update_lock is held (unless we are in | |
566 | detection or initialization steps). This matters when PEC is enabled, | |
567 | because we don't want the address pointer to change between the write | |
568 | byte and the read byte transactions. */ | |
8256fe0f JD |
569 | static int lm90_read_reg(struct i2c_client* client, u8 reg, u8 *value) |
570 | { | |
571 | int err; | |
572 | ||
c3df5806 JD |
573 | if (client->flags & I2C_CLIENT_PEC) { |
574 | err = adm1032_write_byte(client, reg); | |
575 | if (err >= 0) | |
576 | err = i2c_smbus_read_byte(client); | |
577 | } else | |
578 | err = i2c_smbus_read_byte_data(client, reg); | |
8256fe0f JD |
579 | |
580 | if (err < 0) { | |
581 | dev_warn(&client->dev, "Register %#02x read failed (%d)\n", | |
582 | reg, err); | |
583 | return err; | |
584 | } | |
585 | *value = err; | |
586 | ||
587 | return 0; | |
588 | } | |
589 | ||
9b0e8526 JD |
590 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
591 | static int lm90_detect(struct i2c_client *new_client, int kind, | |
592 | struct i2c_board_info *info) | |
1da177e4 | 593 | { |
9b0e8526 JD |
594 | struct i2c_adapter *adapter = new_client->adapter; |
595 | int address = new_client->addr; | |
1da177e4 LT |
596 | const char *name = ""; |
597 | ||
598 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
9b0e8526 | 599 | return -ENODEV; |
1da177e4 LT |
600 | |
601 | /* | |
602 | * Now we do the remaining detection. A negative kind means that | |
603 | * the driver was loaded with no force parameter (default), so we | |
604 | * must both detect and identify the chip. A zero kind means that | |
605 | * the driver was loaded with the force parameter, the detection | |
606 | * step shall be skipped. A positive kind means that the driver | |
607 | * was loaded with the force parameter and a given kind of chip is | |
608 | * requested, so both the detection and the identification steps | |
609 | * are skipped. | |
610 | */ | |
611 | ||
612 | /* Default to an LM90 if forced */ | |
613 | if (kind == 0) | |
614 | kind = lm90; | |
615 | ||
616 | if (kind < 0) { /* detection and identification */ | |
e0ae87a4 JD |
617 | int man_id, chip_id, reg_config1, reg_convrate; |
618 | ||
619 | if ((man_id = i2c_smbus_read_byte_data(new_client, | |
620 | LM90_REG_R_MAN_ID)) < 0 | |
621 | || (chip_id = i2c_smbus_read_byte_data(new_client, | |
622 | LM90_REG_R_CHIP_ID)) < 0 | |
623 | || (reg_config1 = i2c_smbus_read_byte_data(new_client, | |
624 | LM90_REG_R_CONFIG1)) < 0 | |
625 | || (reg_convrate = i2c_smbus_read_byte_data(new_client, | |
626 | LM90_REG_R_CONVRATE)) < 0) | |
9b0e8526 | 627 | return -ENODEV; |
1da177e4 | 628 | |
32c82a93 RB |
629 | if ((address == 0x4C || address == 0x4D) |
630 | && man_id == 0x01) { /* National Semiconductor */ | |
e0ae87a4 | 631 | int reg_config2; |
1da177e4 | 632 | |
e0ae87a4 JD |
633 | if ((reg_config2 = i2c_smbus_read_byte_data(new_client, |
634 | LM90_REG_R_CONFIG2)) < 0) | |
9b0e8526 | 635 | return -ENODEV; |
1da177e4 LT |
636 | |
637 | if ((reg_config1 & 0x2A) == 0x00 | |
638 | && (reg_config2 & 0xF8) == 0x00 | |
639 | && reg_convrate <= 0x09) { | |
640 | if (address == 0x4C | |
641 | && (chip_id & 0xF0) == 0x20) { /* LM90 */ | |
642 | kind = lm90; | |
643 | } else | |
644 | if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */ | |
645 | kind = lm99; | |
646 | } else | |
647 | if (address == 0x4C | |
648 | && (chip_id & 0xF0) == 0x10) { /* LM86 */ | |
649 | kind = lm86; | |
650 | } | |
651 | } | |
652 | } else | |
32c82a93 RB |
653 | if ((address == 0x4C || address == 0x4D) |
654 | && man_id == 0x41) { /* Analog Devices */ | |
90209b42 | 655 | if ((chip_id & 0xF0) == 0x40 /* ADM1032 */ |
1da177e4 LT |
656 | && (reg_config1 & 0x3F) == 0x00 |
657 | && reg_convrate <= 0x0A) { | |
658 | kind = adm1032; | |
659 | } else | |
90209b42 | 660 | if (chip_id == 0x51 /* ADT7461 */ |
23b2d477 | 661 | && (reg_config1 & 0x1B) == 0x00 |
1da177e4 LT |
662 | && reg_convrate <= 0x0A) { |
663 | kind = adt7461; | |
664 | } | |
665 | } else | |
666 | if (man_id == 0x4D) { /* Maxim */ | |
667 | /* | |
32c82a93 RB |
668 | * The MAX6657, MAX6658 and MAX6659 do NOT have a |
669 | * chip_id register. Reading from that address will | |
670 | * return the last read value, which in our case is | |
671 | * those of the man_id register. Likewise, the config1 | |
672 | * register seems to lack a low nibble, so the value | |
673 | * will be those of the previous read, so in our case | |
674 | * those of the man_id register. | |
1da177e4 LT |
675 | */ |
676 | if (chip_id == man_id | |
f5744e37 | 677 | && (address == 0x4C || address == 0x4D) |
1da177e4 LT |
678 | && (reg_config1 & 0x1F) == (man_id & 0x0F) |
679 | && reg_convrate <= 0x09) { | |
680 | kind = max6657; | |
32c82a93 RB |
681 | } else |
682 | /* The chip_id register of the MAX6680 and MAX6681 | |
683 | * holds the revision of the chip. | |
684 | * the lowest bit of the config1 register is unused | |
685 | * and should return zero when read, so should the | |
686 | * second to last bit of config1 (software reset) | |
687 | */ | |
688 | if (chip_id == 0x01 | |
689 | && (reg_config1 & 0x03) == 0x00 | |
690 | && reg_convrate <= 0x07) { | |
691 | kind = max6680; | |
1da177e4 LT |
692 | } |
693 | } | |
694 | ||
695 | if (kind <= 0) { /* identification failed */ | |
696 | dev_info(&adapter->dev, | |
697 | "Unsupported chip (man_id=0x%02X, " | |
698 | "chip_id=0x%02X).\n", man_id, chip_id); | |
9b0e8526 | 699 | return -ENODEV; |
1da177e4 LT |
700 | } |
701 | } | |
702 | ||
9b0e8526 | 703 | /* Fill the i2c board info */ |
1da177e4 LT |
704 | if (kind == lm90) { |
705 | name = "lm90"; | |
706 | } else if (kind == adm1032) { | |
707 | name = "adm1032"; | |
c3df5806 JD |
708 | /* The ADM1032 supports PEC, but only if combined |
709 | transactions are not used. */ | |
710 | if (i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) | |
9b0e8526 | 711 | info->flags |= I2C_CLIENT_PEC; |
1da177e4 LT |
712 | } else if (kind == lm99) { |
713 | name = "lm99"; | |
714 | } else if (kind == lm86) { | |
715 | name = "lm86"; | |
716 | } else if (kind == max6657) { | |
717 | name = "max6657"; | |
32c82a93 RB |
718 | } else if (kind == max6680) { |
719 | name = "max6680"; | |
1da177e4 LT |
720 | } else if (kind == adt7461) { |
721 | name = "adt7461"; | |
722 | } | |
9b0e8526 JD |
723 | strlcpy(info->type, name, I2C_NAME_SIZE); |
724 | ||
725 | return 0; | |
726 | } | |
727 | ||
728 | static int lm90_probe(struct i2c_client *new_client, | |
729 | const struct i2c_device_id *id) | |
730 | { | |
731 | struct i2c_adapter *adapter = to_i2c_adapter(new_client->dev.parent); | |
732 | struct lm90_data *data; | |
733 | int err; | |
1da177e4 | 734 | |
9b0e8526 JD |
735 | data = kzalloc(sizeof(struct lm90_data), GFP_KERNEL); |
736 | if (!data) { | |
737 | err = -ENOMEM; | |
738 | goto exit; | |
739 | } | |
740 | i2c_set_clientdata(new_client, data); | |
9a61bf63 | 741 | mutex_init(&data->update_lock); |
1da177e4 | 742 | |
9b0e8526 JD |
743 | /* Set the device type */ |
744 | data->kind = id->driver_data; | |
745 | if (data->kind == adm1032) { | |
746 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) | |
747 | new_client->flags &= ~I2C_CLIENT_PEC; | |
748 | } | |
1da177e4 LT |
749 | |
750 | /* Initialize the LM90 chip */ | |
751 | lm90_init_client(new_client); | |
752 | ||
753 | /* Register sysfs hooks */ | |
0e39e01c | 754 | if ((err = sysfs_create_group(&new_client->dev.kobj, &lm90_group))) |
9b0e8526 | 755 | goto exit_free; |
0e39e01c JD |
756 | if (new_client->flags & I2C_CLIENT_PEC) { |
757 | if ((err = device_create_file(&new_client->dev, | |
758 | &dev_attr_pec))) | |
759 | goto exit_remove_files; | |
760 | } | |
69f2f96d JD |
761 | if (data->kind != max6657) { |
762 | if ((err = device_create_file(&new_client->dev, | |
763 | &sensor_dev_attr_temp2_offset.dev_attr))) | |
764 | goto exit_remove_files; | |
765 | } | |
0e39e01c | 766 | |
1beeffe4 TJ |
767 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
768 | if (IS_ERR(data->hwmon_dev)) { | |
769 | err = PTR_ERR(data->hwmon_dev); | |
0e39e01c | 770 | goto exit_remove_files; |
943b0830 MH |
771 | } |
772 | ||
1da177e4 LT |
773 | return 0; |
774 | ||
0e39e01c JD |
775 | exit_remove_files: |
776 | sysfs_remove_group(&new_client->dev.kobj, &lm90_group); | |
777 | device_remove_file(&new_client->dev, &dev_attr_pec); | |
1da177e4 LT |
778 | exit_free: |
779 | kfree(data); | |
780 | exit: | |
781 | return err; | |
782 | } | |
783 | ||
784 | static void lm90_init_client(struct i2c_client *client) | |
785 | { | |
32c82a93 RB |
786 | u8 config, config_orig; |
787 | struct lm90_data *data = i2c_get_clientdata(client); | |
1da177e4 LT |
788 | |
789 | /* | |
790 | * Start the conversions. | |
791 | */ | |
792 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, | |
793 | 5); /* 2 Hz */ | |
8256fe0f JD |
794 | if (lm90_read_reg(client, LM90_REG_R_CONFIG1, &config) < 0) { |
795 | dev_warn(&client->dev, "Initialization failed!\n"); | |
796 | return; | |
797 | } | |
32c82a93 RB |
798 | config_orig = config; |
799 | ||
23b2d477 NC |
800 | /* Check Temperature Range Select */ |
801 | if (data->kind == adt7461) { | |
802 | if (config & 0x04) | |
803 | data->flags |= LM90_FLAG_ADT7461_EXT; | |
804 | } | |
805 | ||
32c82a93 RB |
806 | /* |
807 | * Put MAX6680/MAX8881 into extended resolution (bit 0x10, | |
808 | * 0.125 degree resolution) and range (0x08, extend range | |
809 | * to -64 degree) mode for the remote temperature sensor. | |
810 | */ | |
811 | if (data->kind == max6680) { | |
812 | config |= 0x18; | |
813 | } | |
814 | ||
815 | config &= 0xBF; /* run */ | |
816 | if (config != config_orig) /* Only write if changed */ | |
817 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config); | |
1da177e4 LT |
818 | } |
819 | ||
9b0e8526 | 820 | static int lm90_remove(struct i2c_client *client) |
1da177e4 | 821 | { |
943b0830 | 822 | struct lm90_data *data = i2c_get_clientdata(client); |
1da177e4 | 823 | |
1beeffe4 | 824 | hwmon_device_unregister(data->hwmon_dev); |
0e39e01c JD |
825 | sysfs_remove_group(&client->dev.kobj, &lm90_group); |
826 | device_remove_file(&client->dev, &dev_attr_pec); | |
69f2f96d JD |
827 | if (data->kind != max6657) |
828 | device_remove_file(&client->dev, | |
829 | &sensor_dev_attr_temp2_offset.dev_attr); | |
943b0830 | 830 | |
943b0830 | 831 | kfree(data); |
1da177e4 LT |
832 | return 0; |
833 | } | |
834 | ||
6388a388 JD |
835 | static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, u16 *value) |
836 | { | |
837 | int err; | |
838 | u8 oldh, newh, l; | |
839 | ||
840 | /* | |
841 | * There is a trick here. We have to read two registers to have the | |
842 | * sensor temperature, but we have to beware a conversion could occur | |
843 | * inbetween the readings. The datasheet says we should either use | |
844 | * the one-shot conversion register, which we don't want to do | |
845 | * (disables hardware monitoring) or monitor the busy bit, which is | |
846 | * impossible (we can't read the values and monitor that bit at the | |
847 | * exact same time). So the solution used here is to read the high | |
848 | * byte once, then the low byte, then the high byte again. If the new | |
849 | * high byte matches the old one, then we have a valid reading. Else | |
850 | * we have to read the low byte again, and now we believe we have a | |
851 | * correct reading. | |
852 | */ | |
853 | if ((err = lm90_read_reg(client, regh, &oldh)) | |
854 | || (err = lm90_read_reg(client, regl, &l)) | |
855 | || (err = lm90_read_reg(client, regh, &newh))) | |
856 | return err; | |
857 | if (oldh != newh) { | |
858 | err = lm90_read_reg(client, regl, &l); | |
859 | if (err) | |
860 | return err; | |
861 | } | |
862 | *value = (newh << 8) | l; | |
863 | ||
864 | return 0; | |
865 | } | |
866 | ||
1da177e4 LT |
867 | static struct lm90_data *lm90_update_device(struct device *dev) |
868 | { | |
869 | struct i2c_client *client = to_i2c_client(dev); | |
870 | struct lm90_data *data = i2c_get_clientdata(client); | |
871 | ||
9a61bf63 | 872 | mutex_lock(&data->update_lock); |
1da177e4 LT |
873 | |
874 | if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { | |
6388a388 | 875 | u8 h, l; |
1da177e4 LT |
876 | |
877 | dev_dbg(&client->dev, "Updating lm90 data.\n"); | |
f65e1708 JD |
878 | lm90_read_reg(client, LM90_REG_R_LOCAL_LOW, &data->temp8[0]); |
879 | lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH, &data->temp8[1]); | |
880 | lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT, &data->temp8[2]); | |
881 | lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT, &data->temp8[3]); | |
8256fe0f | 882 | lm90_read_reg(client, LM90_REG_R_TCRIT_HYST, &data->temp_hyst); |
1da177e4 | 883 | |
f65e1708 JD |
884 | if (data->kind == max6657) { |
885 | lm90_read16(client, LM90_REG_R_LOCAL_TEMP, | |
886 | MAX6657_REG_R_LOCAL_TEMPL, | |
887 | &data->temp11[4]); | |
888 | } else { | |
889 | if (lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP, | |
890 | &h) == 0) | |
891 | data->temp11[4] = h << 8; | |
892 | } | |
6388a388 JD |
893 | lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, |
894 | LM90_REG_R_REMOTE_TEMPL, &data->temp11[0]); | |
895 | ||
5f502a83 JD |
896 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h) == 0) { |
897 | data->temp11[1] = h << 8; | |
898 | if (data->kind != max6657 && data->kind != max6680 | |
899 | && lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL, | |
900 | &l) == 0) | |
901 | data->temp11[1] |= l; | |
902 | } | |
903 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h) == 0) { | |
904 | data->temp11[2] = h << 8; | |
905 | if (data->kind != max6657 && data->kind != max6680 | |
906 | && lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL, | |
907 | &l) == 0) | |
908 | data->temp11[2] |= l; | |
909 | } | |
910 | ||
69f2f96d JD |
911 | if (data->kind != max6657) { |
912 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSH, | |
6388a388 | 913 | &h) == 0 |
69f2f96d JD |
914 | && lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSL, |
915 | &l) == 0) | |
6388a388 | 916 | data->temp11[3] = (h << 8) | l; |
69f2f96d | 917 | } |
8256fe0f | 918 | lm90_read_reg(client, LM90_REG_R_STATUS, &data->alarms); |
1da177e4 LT |
919 | |
920 | data->last_updated = jiffies; | |
921 | data->valid = 1; | |
922 | } | |
923 | ||
9a61bf63 | 924 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
925 | |
926 | return data; | |
927 | } | |
928 | ||
929 | static int __init sensors_lm90_init(void) | |
930 | { | |
931 | return i2c_add_driver(&lm90_driver); | |
932 | } | |
933 | ||
934 | static void __exit sensors_lm90_exit(void) | |
935 | { | |
936 | i2c_del_driver(&lm90_driver); | |
937 | } | |
938 | ||
939 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); | |
940 | MODULE_DESCRIPTION("LM90/ADM1032 driver"); | |
941 | MODULE_LICENSE("GPL"); | |
942 | ||
943 | module_init(sensors_lm90_init); | |
944 | module_exit(sensors_lm90_exit); |