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e1eb4906 GR |
1 | /* |
2 | * Driver for Texas Instruments / National Semiconductor LM95234 | |
3 | * | |
dfcd4c53 | 4 | * Copyright (c) 2013, 2014 Guenter Roeck <linux@roeck-us.net> |
e1eb4906 GR |
5 | * |
6 | * Derived from lm95241.c | |
7 | * Copyright (C) 2008, 2010 Davide Rizzo <elpa.rizzo@gmail.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/jiffies.h> | |
24 | #include <linux/i2c.h> | |
25 | #include <linux/hwmon.h> | |
26 | #include <linux/hwmon-sysfs.h> | |
27 | #include <linux/err.h> | |
28 | #include <linux/mutex.h> | |
29 | #include <linux/sysfs.h> | |
30 | ||
31 | #define DRVNAME "lm95234" | |
32 | ||
dfcd4c53 GR |
33 | enum chips { lm95233, lm95234 }; |
34 | ||
35 | static const unsigned short normal_i2c[] = { | |
36 | 0x18, 0x2a, 0x2b, 0x4d, 0x4e, I2C_CLIENT_END }; | |
e1eb4906 GR |
37 | |
38 | /* LM95234 registers */ | |
39 | #define LM95234_REG_MAN_ID 0xFE | |
40 | #define LM95234_REG_CHIP_ID 0xFF | |
41 | #define LM95234_REG_STATUS 0x02 | |
42 | #define LM95234_REG_CONFIG 0x03 | |
43 | #define LM95234_REG_CONVRATE 0x04 | |
44 | #define LM95234_REG_STS_FAULT 0x07 | |
45 | #define LM95234_REG_STS_TCRIT1 0x08 | |
46 | #define LM95234_REG_STS_TCRIT2 0x09 | |
47 | #define LM95234_REG_TEMPH(x) ((x) + 0x10) | |
48 | #define LM95234_REG_TEMPL(x) ((x) + 0x20) | |
49 | #define LM95234_REG_UTEMPH(x) ((x) + 0x19) /* Remote only */ | |
50 | #define LM95234_REG_UTEMPL(x) ((x) + 0x29) | |
51 | #define LM95234_REG_REM_MODEL 0x30 | |
52 | #define LM95234_REG_REM_MODEL_STS 0x38 | |
53 | #define LM95234_REG_OFFSET(x) ((x) + 0x31) /* Remote only */ | |
54 | #define LM95234_REG_TCRIT1(x) ((x) + 0x40) | |
55 | #define LM95234_REG_TCRIT2(x) ((x) + 0x49) /* Remote channel 1,2 */ | |
56 | #define LM95234_REG_TCRIT_HYST 0x5a | |
57 | ||
58 | #define NATSEMI_MAN_ID 0x01 | |
dfcd4c53 | 59 | #define LM95233_CHIP_ID 0x89 |
e1eb4906 GR |
60 | #define LM95234_CHIP_ID 0x79 |
61 | ||
62 | /* Client data (each client gets its own) */ | |
63 | struct lm95234_data { | |
9d86bd6b | 64 | struct i2c_client *client; |
dfcd4c53 | 65 | const struct attribute_group *groups[3]; |
e1eb4906 GR |
66 | struct mutex update_lock; |
67 | unsigned long last_updated, interval; /* in jiffies */ | |
68 | bool valid; /* false until following fields are valid */ | |
69 | /* registers values */ | |
70 | int temp[5]; /* temperature (signed) */ | |
71 | u32 status; /* fault/alarm status */ | |
72 | u8 tcrit1[5]; /* critical temperature limit */ | |
73 | u8 tcrit2[2]; /* high temperature limit */ | |
74 | s8 toffset[4]; /* remote temperature offset */ | |
75 | u8 thyst; /* common hysteresis */ | |
76 | ||
77 | u8 sensor_type; /* temperature sensor type */ | |
78 | }; | |
79 | ||
80 | static int lm95234_read_temp(struct i2c_client *client, int index, int *t) | |
81 | { | |
82 | int val; | |
83 | u16 temp = 0; | |
84 | ||
85 | if (index) { | |
86 | val = i2c_smbus_read_byte_data(client, | |
87 | LM95234_REG_UTEMPH(index - 1)); | |
88 | if (val < 0) | |
89 | return val; | |
90 | temp = val << 8; | |
91 | val = i2c_smbus_read_byte_data(client, | |
92 | LM95234_REG_UTEMPL(index - 1)); | |
93 | if (val < 0) | |
94 | return val; | |
95 | temp |= val; | |
96 | *t = temp; | |
97 | } | |
98 | /* | |
99 | * Read signed temperature if unsigned temperature is 0, | |
100 | * or if this is the local sensor. | |
101 | */ | |
102 | if (!temp) { | |
103 | val = i2c_smbus_read_byte_data(client, | |
104 | LM95234_REG_TEMPH(index)); | |
105 | if (val < 0) | |
106 | return val; | |
107 | temp = val << 8; | |
108 | val = i2c_smbus_read_byte_data(client, | |
109 | LM95234_REG_TEMPL(index)); | |
110 | if (val < 0) | |
111 | return val; | |
112 | temp |= val; | |
113 | *t = (s16)temp; | |
114 | } | |
115 | return 0; | |
116 | } | |
117 | ||
118 | static u16 update_intervals[] = { 143, 364, 1000, 2500 }; | |
119 | ||
120 | /* Fill value cache. Must be called with update lock held. */ | |
121 | ||
9d86bd6b GR |
122 | static int lm95234_fill_cache(struct lm95234_data *data, |
123 | struct i2c_client *client) | |
e1eb4906 | 124 | { |
e1eb4906 GR |
125 | int i, ret; |
126 | ||
127 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_CONVRATE); | |
128 | if (ret < 0) | |
129 | return ret; | |
130 | ||
131 | data->interval = msecs_to_jiffies(update_intervals[ret & 0x03]); | |
132 | ||
133 | for (i = 0; i < ARRAY_SIZE(data->tcrit1); i++) { | |
134 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT1(i)); | |
135 | if (ret < 0) | |
136 | return ret; | |
137 | data->tcrit1[i] = ret; | |
138 | } | |
139 | for (i = 0; i < ARRAY_SIZE(data->tcrit2); i++) { | |
140 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT2(i)); | |
141 | if (ret < 0) | |
142 | return ret; | |
143 | data->tcrit2[i] = ret; | |
144 | } | |
145 | for (i = 0; i < ARRAY_SIZE(data->toffset); i++) { | |
146 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_OFFSET(i)); | |
147 | if (ret < 0) | |
148 | return ret; | |
149 | data->toffset[i] = ret; | |
150 | } | |
151 | ||
152 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT_HYST); | |
153 | if (ret < 0) | |
154 | return ret; | |
155 | data->thyst = ret; | |
156 | ||
157 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); | |
158 | if (ret < 0) | |
159 | return ret; | |
160 | data->sensor_type = ret; | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
9d86bd6b | 165 | static int lm95234_update_device(struct lm95234_data *data) |
e1eb4906 | 166 | { |
9d86bd6b | 167 | struct i2c_client *client = data->client; |
e1eb4906 GR |
168 | int ret; |
169 | ||
170 | mutex_lock(&data->update_lock); | |
171 | ||
172 | if (time_after(jiffies, data->last_updated + data->interval) || | |
173 | !data->valid) { | |
174 | int i; | |
175 | ||
176 | if (!data->valid) { | |
9d86bd6b | 177 | ret = lm95234_fill_cache(data, client); |
e1eb4906 GR |
178 | if (ret < 0) |
179 | goto abort; | |
180 | } | |
181 | ||
182 | data->valid = false; | |
183 | for (i = 0; i < ARRAY_SIZE(data->temp); i++) { | |
184 | ret = lm95234_read_temp(client, i, &data->temp[i]); | |
185 | if (ret < 0) | |
186 | goto abort; | |
187 | } | |
188 | ||
189 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_FAULT); | |
190 | if (ret < 0) | |
191 | goto abort; | |
192 | data->status = ret; | |
193 | ||
194 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_TCRIT1); | |
195 | if (ret < 0) | |
196 | goto abort; | |
197 | data->status |= ret << 8; | |
198 | ||
199 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_TCRIT2); | |
200 | if (ret < 0) | |
201 | goto abort; | |
202 | data->status |= ret << 16; | |
203 | ||
204 | data->last_updated = jiffies; | |
205 | data->valid = true; | |
206 | } | |
207 | ret = 0; | |
208 | abort: | |
209 | mutex_unlock(&data->update_lock); | |
210 | ||
211 | return ret; | |
212 | } | |
213 | ||
214 | static ssize_t show_temp(struct device *dev, struct device_attribute *attr, | |
215 | char *buf) | |
216 | { | |
9d86bd6b | 217 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 218 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 219 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
220 | |
221 | if (ret) | |
222 | return ret; | |
223 | ||
224 | return sprintf(buf, "%d\n", | |
225 | DIV_ROUND_CLOSEST(data->temp[index] * 125, 32)); | |
226 | } | |
227 | ||
228 | static ssize_t show_alarm(struct device *dev, | |
229 | struct device_attribute *attr, char *buf) | |
230 | { | |
9d86bd6b | 231 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 232 | u32 mask = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 233 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
234 | |
235 | if (ret) | |
236 | return ret; | |
237 | ||
238 | return sprintf(buf, "%u", !!(data->status & mask)); | |
239 | } | |
240 | ||
241 | static ssize_t show_type(struct device *dev, struct device_attribute *attr, | |
242 | char *buf) | |
243 | { | |
9d86bd6b | 244 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 245 | u8 mask = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 246 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
247 | |
248 | if (ret) | |
249 | return ret; | |
250 | ||
251 | return sprintf(buf, data->sensor_type & mask ? "1\n" : "2\n"); | |
252 | } | |
253 | ||
254 | static ssize_t set_type(struct device *dev, struct device_attribute *attr, | |
255 | const char *buf, size_t count) | |
256 | { | |
9d86bd6b | 257 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 GR |
258 | unsigned long val; |
259 | u8 mask = to_sensor_dev_attr(attr)->index; | |
9d86bd6b | 260 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
261 | |
262 | if (ret) | |
263 | return ret; | |
264 | ||
265 | ret = kstrtoul(buf, 10, &val); | |
266 | if (ret < 0) | |
267 | return ret; | |
268 | ||
269 | if (val != 1 && val != 2) | |
270 | return -EINVAL; | |
271 | ||
272 | mutex_lock(&data->update_lock); | |
273 | if (val == 1) | |
274 | data->sensor_type |= mask; | |
275 | else | |
276 | data->sensor_type &= ~mask; | |
277 | data->valid = false; | |
9d86bd6b | 278 | i2c_smbus_write_byte_data(data->client, LM95234_REG_REM_MODEL, |
e1eb4906 GR |
279 | data->sensor_type); |
280 | mutex_unlock(&data->update_lock); | |
281 | ||
282 | return count; | |
283 | } | |
284 | ||
285 | static ssize_t show_tcrit2(struct device *dev, struct device_attribute *attr, | |
286 | char *buf) | |
287 | { | |
9d86bd6b | 288 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 289 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 290 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
291 | |
292 | if (ret) | |
293 | return ret; | |
294 | ||
295 | return sprintf(buf, "%u", data->tcrit2[index] * 1000); | |
296 | } | |
297 | ||
298 | static ssize_t set_tcrit2(struct device *dev, struct device_attribute *attr, | |
299 | const char *buf, size_t count) | |
300 | { | |
9d86bd6b | 301 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 GR |
302 | int index = to_sensor_dev_attr(attr)->index; |
303 | long val; | |
9d86bd6b | 304 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
305 | |
306 | if (ret) | |
307 | return ret; | |
308 | ||
309 | ret = kstrtol(buf, 10, &val); | |
310 | if (ret < 0) | |
311 | return ret; | |
312 | ||
313 | val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, index ? 255 : 127); | |
314 | ||
315 | mutex_lock(&data->update_lock); | |
316 | data->tcrit2[index] = val; | |
9d86bd6b | 317 | i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT2(index), val); |
e1eb4906 GR |
318 | mutex_unlock(&data->update_lock); |
319 | ||
320 | return count; | |
321 | } | |
322 | ||
323 | static ssize_t show_tcrit2_hyst(struct device *dev, | |
324 | struct device_attribute *attr, char *buf) | |
325 | { | |
9d86bd6b | 326 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 327 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 328 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
329 | |
330 | if (ret) | |
331 | return ret; | |
332 | ||
333 | /* Result can be negative, so be careful with unsigned operands */ | |
334 | return sprintf(buf, "%d", | |
335 | ((int)data->tcrit2[index] - (int)data->thyst) * 1000); | |
336 | } | |
337 | ||
338 | static ssize_t show_tcrit1(struct device *dev, struct device_attribute *attr, | |
339 | char *buf) | |
340 | { | |
9d86bd6b | 341 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 GR |
342 | int index = to_sensor_dev_attr(attr)->index; |
343 | ||
344 | return sprintf(buf, "%u", data->tcrit1[index] * 1000); | |
345 | } | |
346 | ||
347 | static ssize_t set_tcrit1(struct device *dev, struct device_attribute *attr, | |
348 | const char *buf, size_t count) | |
349 | { | |
9d86bd6b | 350 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 351 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 352 | int ret = lm95234_update_device(data); |
e1eb4906 | 353 | long val; |
e1eb4906 GR |
354 | |
355 | if (ret) | |
356 | return ret; | |
357 | ||
358 | ret = kstrtol(buf, 10, &val); | |
359 | if (ret < 0) | |
360 | return ret; | |
361 | ||
362 | val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, 255); | |
363 | ||
364 | mutex_lock(&data->update_lock); | |
365 | data->tcrit1[index] = val; | |
9d86bd6b | 366 | i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT1(index), val); |
e1eb4906 GR |
367 | mutex_unlock(&data->update_lock); |
368 | ||
369 | return count; | |
370 | } | |
371 | ||
372 | static ssize_t show_tcrit1_hyst(struct device *dev, | |
373 | struct device_attribute *attr, char *buf) | |
374 | { | |
9d86bd6b | 375 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 376 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 377 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
378 | |
379 | if (ret) | |
380 | return ret; | |
381 | ||
382 | /* Result can be negative, so be careful with unsigned operands */ | |
383 | return sprintf(buf, "%d", | |
384 | ((int)data->tcrit1[index] - (int)data->thyst) * 1000); | |
385 | } | |
386 | ||
387 | static ssize_t set_tcrit1_hyst(struct device *dev, | |
388 | struct device_attribute *attr, | |
389 | const char *buf, size_t count) | |
390 | { | |
9d86bd6b | 391 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 392 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 393 | int ret = lm95234_update_device(data); |
e1eb4906 | 394 | long val; |
e1eb4906 GR |
395 | |
396 | if (ret) | |
397 | return ret; | |
398 | ||
399 | ret = kstrtol(buf, 10, &val); | |
400 | if (ret < 0) | |
401 | return ret; | |
402 | ||
403 | val = DIV_ROUND_CLOSEST(val, 1000); | |
404 | val = clamp_val((int)data->tcrit1[index] - val, 0, 31); | |
405 | ||
406 | mutex_lock(&data->update_lock); | |
407 | data->thyst = val; | |
9d86bd6b | 408 | i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT_HYST, val); |
e1eb4906 GR |
409 | mutex_unlock(&data->update_lock); |
410 | ||
411 | return count; | |
412 | } | |
413 | ||
414 | static ssize_t show_offset(struct device *dev, struct device_attribute *attr, | |
415 | char *buf) | |
416 | { | |
9d86bd6b | 417 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 418 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 419 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
420 | |
421 | if (ret) | |
422 | return ret; | |
423 | ||
424 | return sprintf(buf, "%d", data->toffset[index] * 500); | |
425 | } | |
426 | ||
427 | static ssize_t set_offset(struct device *dev, struct device_attribute *attr, | |
428 | const char *buf, size_t count) | |
429 | { | |
9d86bd6b | 430 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 431 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 432 | int ret = lm95234_update_device(data); |
e1eb4906 | 433 | long val; |
e1eb4906 GR |
434 | |
435 | if (ret) | |
436 | return ret; | |
437 | ||
438 | ret = kstrtol(buf, 10, &val); | |
439 | if (ret < 0) | |
440 | return ret; | |
441 | ||
442 | /* Accuracy is 1/2 degrees C */ | |
443 | val = clamp_val(DIV_ROUND_CLOSEST(val, 500), -128, 127); | |
444 | ||
445 | mutex_lock(&data->update_lock); | |
446 | data->toffset[index] = val; | |
9d86bd6b | 447 | i2c_smbus_write_byte_data(data->client, LM95234_REG_OFFSET(index), val); |
e1eb4906 GR |
448 | mutex_unlock(&data->update_lock); |
449 | ||
450 | return count; | |
451 | } | |
452 | ||
2f2dbea6 JL |
453 | static ssize_t update_interval_show(struct device *dev, |
454 | struct device_attribute *attr, char *buf) | |
e1eb4906 | 455 | { |
9d86bd6b GR |
456 | struct lm95234_data *data = dev_get_drvdata(dev); |
457 | int ret = lm95234_update_device(data); | |
e1eb4906 GR |
458 | |
459 | if (ret) | |
460 | return ret; | |
461 | ||
462 | return sprintf(buf, "%lu\n", | |
463 | DIV_ROUND_CLOSEST(data->interval * 1000, HZ)); | |
464 | } | |
465 | ||
2f2dbea6 JL |
466 | static ssize_t update_interval_store(struct device *dev, |
467 | struct device_attribute *attr, | |
468 | const char *buf, size_t count) | |
e1eb4906 | 469 | { |
9d86bd6b GR |
470 | struct lm95234_data *data = dev_get_drvdata(dev); |
471 | int ret = lm95234_update_device(data); | |
e1eb4906 GR |
472 | unsigned long val; |
473 | u8 regval; | |
e1eb4906 GR |
474 | |
475 | if (ret) | |
476 | return ret; | |
477 | ||
478 | ret = kstrtoul(buf, 10, &val); | |
479 | if (ret < 0) | |
480 | return ret; | |
481 | ||
482 | for (regval = 0; regval < 3; regval++) { | |
483 | if (val <= update_intervals[regval]) | |
484 | break; | |
485 | } | |
486 | ||
487 | mutex_lock(&data->update_lock); | |
488 | data->interval = msecs_to_jiffies(update_intervals[regval]); | |
9d86bd6b | 489 | i2c_smbus_write_byte_data(data->client, LM95234_REG_CONVRATE, regval); |
e1eb4906 GR |
490 | mutex_unlock(&data->update_lock); |
491 | ||
492 | return count; | |
493 | } | |
494 | ||
495 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); | |
496 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); | |
497 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); | |
498 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); | |
499 | static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4); | |
500 | ||
501 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, | |
502 | BIT(0) | BIT(1)); | |
503 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, | |
504 | BIT(2) | BIT(3)); | |
505 | static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_alarm, NULL, | |
506 | BIT(4) | BIT(5)); | |
507 | static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_alarm, NULL, | |
508 | BIT(6) | BIT(7)); | |
509 | ||
510 | static SENSOR_DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, set_type, | |
511 | BIT(1)); | |
512 | static SENSOR_DEVICE_ATTR(temp3_type, S_IWUSR | S_IRUGO, show_type, set_type, | |
513 | BIT(2)); | |
514 | static SENSOR_DEVICE_ATTR(temp4_type, S_IWUSR | S_IRUGO, show_type, set_type, | |
515 | BIT(3)); | |
516 | static SENSOR_DEVICE_ATTR(temp5_type, S_IWUSR | S_IRUGO, show_type, set_type, | |
517 | BIT(4)); | |
518 | ||
519 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_tcrit1, | |
520 | set_tcrit1, 0); | |
521 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_tcrit2, | |
522 | set_tcrit2, 0); | |
523 | static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_tcrit2, | |
524 | set_tcrit2, 1); | |
525 | static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_tcrit1, | |
526 | set_tcrit1, 3); | |
527 | static SENSOR_DEVICE_ATTR(temp5_max, S_IWUSR | S_IRUGO, show_tcrit1, | |
528 | set_tcrit1, 4); | |
529 | ||
530 | static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_tcrit1_hyst, | |
531 | set_tcrit1_hyst, 0); | |
532 | static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO, show_tcrit2_hyst, NULL, 0); | |
533 | static SENSOR_DEVICE_ATTR(temp3_max_hyst, S_IRUGO, show_tcrit2_hyst, NULL, 1); | |
534 | static SENSOR_DEVICE_ATTR(temp4_max_hyst, S_IRUGO, show_tcrit1_hyst, NULL, 3); | |
535 | static SENSOR_DEVICE_ATTR(temp5_max_hyst, S_IRUGO, show_tcrit1_hyst, NULL, 4); | |
536 | ||
537 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, | |
538 | BIT(0 + 8)); | |
539 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, | |
540 | BIT(1 + 16)); | |
541 | static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, | |
542 | BIT(2 + 16)); | |
543 | static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_alarm, NULL, | |
544 | BIT(3 + 8)); | |
545 | static SENSOR_DEVICE_ATTR(temp5_max_alarm, S_IRUGO, show_alarm, NULL, | |
546 | BIT(4 + 8)); | |
547 | ||
548 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_tcrit1, | |
549 | set_tcrit1, 1); | |
550 | static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_tcrit1, | |
551 | set_tcrit1, 2); | |
552 | ||
553 | static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_tcrit1_hyst, NULL, 1); | |
554 | static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_tcrit1_hyst, NULL, 2); | |
555 | ||
556 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, | |
557 | BIT(1 + 8)); | |
558 | static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, | |
559 | BIT(2 + 8)); | |
560 | ||
561 | static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_offset, | |
562 | set_offset, 0); | |
563 | static SENSOR_DEVICE_ATTR(temp3_offset, S_IWUSR | S_IRUGO, show_offset, | |
564 | set_offset, 1); | |
565 | static SENSOR_DEVICE_ATTR(temp4_offset, S_IWUSR | S_IRUGO, show_offset, | |
566 | set_offset, 2); | |
567 | static SENSOR_DEVICE_ATTR(temp5_offset, S_IWUSR | S_IRUGO, show_offset, | |
568 | set_offset, 3); | |
569 | ||
2f2dbea6 | 570 | static DEVICE_ATTR_RW(update_interval); |
e1eb4906 | 571 | |
dfcd4c53 | 572 | static struct attribute *lm95234_common_attrs[] = { |
e1eb4906 GR |
573 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
574 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
575 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
e1eb4906 GR |
576 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
577 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
e1eb4906 GR |
578 | &sensor_dev_attr_temp2_type.dev_attr.attr, |
579 | &sensor_dev_attr_temp3_type.dev_attr.attr, | |
e1eb4906 GR |
580 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
581 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
582 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
e1eb4906 GR |
583 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, |
584 | &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, | |
585 | &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, | |
e1eb4906 GR |
586 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, |
587 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
588 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, | |
e1eb4906 GR |
589 | &sensor_dev_attr_temp2_crit.dev_attr.attr, |
590 | &sensor_dev_attr_temp3_crit.dev_attr.attr, | |
591 | &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, | |
592 | &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, | |
593 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
594 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, | |
595 | &sensor_dev_attr_temp2_offset.dev_attr.attr, | |
596 | &sensor_dev_attr_temp3_offset.dev_attr.attr, | |
dfcd4c53 GR |
597 | &dev_attr_update_interval.attr, |
598 | NULL | |
599 | }; | |
600 | ||
601 | static const struct attribute_group lm95234_common_group = { | |
602 | .attrs = lm95234_common_attrs, | |
603 | }; | |
604 | ||
605 | static struct attribute *lm95234_attrs[] = { | |
606 | &sensor_dev_attr_temp4_input.dev_attr.attr, | |
607 | &sensor_dev_attr_temp5_input.dev_attr.attr, | |
608 | &sensor_dev_attr_temp4_fault.dev_attr.attr, | |
609 | &sensor_dev_attr_temp5_fault.dev_attr.attr, | |
610 | &sensor_dev_attr_temp4_type.dev_attr.attr, | |
611 | &sensor_dev_attr_temp5_type.dev_attr.attr, | |
612 | &sensor_dev_attr_temp4_max.dev_attr.attr, | |
613 | &sensor_dev_attr_temp5_max.dev_attr.attr, | |
614 | &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, | |
615 | &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, | |
616 | &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, | |
617 | &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, | |
e1eb4906 GR |
618 | &sensor_dev_attr_temp4_offset.dev_attr.attr, |
619 | &sensor_dev_attr_temp5_offset.dev_attr.attr, | |
e1eb4906 GR |
620 | NULL |
621 | }; | |
dfcd4c53 GR |
622 | |
623 | static const struct attribute_group lm95234_group = { | |
624 | .attrs = lm95234_attrs, | |
625 | }; | |
e1eb4906 GR |
626 | |
627 | static int lm95234_detect(struct i2c_client *client, | |
628 | struct i2c_board_info *info) | |
629 | { | |
630 | struct i2c_adapter *adapter = client->adapter; | |
dfcd4c53 GR |
631 | int address = client->addr; |
632 | u8 config_mask, model_mask; | |
e1eb4906 | 633 | int mfg_id, chip_id, val; |
dfcd4c53 | 634 | const char *name; |
e1eb4906 GR |
635 | |
636 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
637 | return -ENODEV; | |
638 | ||
639 | mfg_id = i2c_smbus_read_byte_data(client, LM95234_REG_MAN_ID); | |
640 | if (mfg_id != NATSEMI_MAN_ID) | |
641 | return -ENODEV; | |
642 | ||
643 | chip_id = i2c_smbus_read_byte_data(client, LM95234_REG_CHIP_ID); | |
dfcd4c53 GR |
644 | switch (chip_id) { |
645 | case LM95233_CHIP_ID: | |
646 | if (address != 0x18 && address != 0x2a && address != 0x2b) | |
647 | return -ENODEV; | |
648 | config_mask = 0xbf; | |
649 | model_mask = 0xf9; | |
650 | name = "lm95233"; | |
651 | break; | |
652 | case LM95234_CHIP_ID: | |
653 | if (address != 0x18 && address != 0x4d && address != 0x4e) | |
654 | return -ENODEV; | |
655 | config_mask = 0xbc; | |
656 | model_mask = 0xe1; | |
657 | name = "lm95234"; | |
658 | break; | |
659 | default: | |
e1eb4906 | 660 | return -ENODEV; |
dfcd4c53 | 661 | } |
e1eb4906 GR |
662 | |
663 | val = i2c_smbus_read_byte_data(client, LM95234_REG_STATUS); | |
664 | if (val & 0x30) | |
665 | return -ENODEV; | |
666 | ||
667 | val = i2c_smbus_read_byte_data(client, LM95234_REG_CONFIG); | |
dfcd4c53 | 668 | if (val & config_mask) |
e1eb4906 GR |
669 | return -ENODEV; |
670 | ||
671 | val = i2c_smbus_read_byte_data(client, LM95234_REG_CONVRATE); | |
672 | if (val & 0xfc) | |
673 | return -ENODEV; | |
674 | ||
675 | val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); | |
dfcd4c53 | 676 | if (val & model_mask) |
e1eb4906 GR |
677 | return -ENODEV; |
678 | ||
679 | val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL_STS); | |
dfcd4c53 | 680 | if (val & model_mask) |
e1eb4906 GR |
681 | return -ENODEV; |
682 | ||
dfcd4c53 | 683 | strlcpy(info->type, name, I2C_NAME_SIZE); |
e1eb4906 GR |
684 | return 0; |
685 | } | |
686 | ||
687 | static int lm95234_init_client(struct i2c_client *client) | |
688 | { | |
689 | int val, model; | |
690 | ||
691 | /* start conversion if necessary */ | |
692 | val = i2c_smbus_read_byte_data(client, LM95234_REG_CONFIG); | |
693 | if (val < 0) | |
694 | return val; | |
695 | if (val & 0x40) | |
696 | i2c_smbus_write_byte_data(client, LM95234_REG_CONFIG, | |
697 | val & ~0x40); | |
698 | ||
699 | /* If diode type status reports an error, try to fix it */ | |
700 | val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL_STS); | |
701 | if (val < 0) | |
702 | return val; | |
703 | model = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); | |
704 | if (model < 0) | |
705 | return model; | |
706 | if (model & val) { | |
707 | dev_notice(&client->dev, | |
708 | "Fixing remote diode type misconfiguration (0x%x)\n", | |
709 | val); | |
710 | i2c_smbus_write_byte_data(client, LM95234_REG_REM_MODEL, | |
711 | model & ~val); | |
712 | } | |
713 | return 0; | |
714 | } | |
715 | ||
716 | static int lm95234_probe(struct i2c_client *client, | |
717 | const struct i2c_device_id *id) | |
718 | { | |
719 | struct device *dev = &client->dev; | |
720 | struct lm95234_data *data; | |
9d86bd6b | 721 | struct device *hwmon_dev; |
e1eb4906 GR |
722 | int err; |
723 | ||
724 | data = devm_kzalloc(dev, sizeof(struct lm95234_data), GFP_KERNEL); | |
725 | if (!data) | |
726 | return -ENOMEM; | |
727 | ||
9d86bd6b | 728 | data->client = client; |
e1eb4906 GR |
729 | mutex_init(&data->update_lock); |
730 | ||
731 | /* Initialize the LM95234 chip */ | |
732 | err = lm95234_init_client(client); | |
733 | if (err < 0) | |
734 | return err; | |
735 | ||
dfcd4c53 GR |
736 | data->groups[0] = &lm95234_common_group; |
737 | if (id->driver_data == lm95234) | |
738 | data->groups[1] = &lm95234_group; | |
739 | ||
9d86bd6b | 740 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
dfcd4c53 | 741 | data, data->groups); |
3ea85ba7 | 742 | return PTR_ERR_OR_ZERO(hwmon_dev); |
e1eb4906 GR |
743 | } |
744 | ||
745 | /* Driver data (common to all clients) */ | |
746 | static const struct i2c_device_id lm95234_id[] = { | |
dfcd4c53 GR |
747 | { "lm95233", lm95233 }, |
748 | { "lm95234", lm95234 }, | |
e1eb4906 GR |
749 | { } |
750 | }; | |
751 | MODULE_DEVICE_TABLE(i2c, lm95234_id); | |
752 | ||
753 | static struct i2c_driver lm95234_driver = { | |
754 | .class = I2C_CLASS_HWMON, | |
755 | .driver = { | |
756 | .name = DRVNAME, | |
757 | }, | |
758 | .probe = lm95234_probe, | |
e1eb4906 GR |
759 | .id_table = lm95234_id, |
760 | .detect = lm95234_detect, | |
761 | .address_list = normal_i2c, | |
762 | }; | |
763 | ||
764 | module_i2c_driver(lm95234_driver); | |
765 | ||
766 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); | |
dfcd4c53 | 767 | MODULE_DESCRIPTION("LM95233/LM95234 sensor driver"); |
e1eb4906 | 768 | MODULE_LICENSE("GPL"); |