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e1eb4906 GR |
1 | /* |
2 | * Driver for Texas Instruments / National Semiconductor LM95234 | |
3 | * | |
4 | * Copyright (c) 2013 Guenter Roeck <linux@roeck-us.net> | |
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 | ||
33 | static const unsigned short normal_i2c[] = { 0x18, 0x4d, 0x4e, I2C_CLIENT_END }; | |
34 | ||
35 | /* LM95234 registers */ | |
36 | #define LM95234_REG_MAN_ID 0xFE | |
37 | #define LM95234_REG_CHIP_ID 0xFF | |
38 | #define LM95234_REG_STATUS 0x02 | |
39 | #define LM95234_REG_CONFIG 0x03 | |
40 | #define LM95234_REG_CONVRATE 0x04 | |
41 | #define LM95234_REG_STS_FAULT 0x07 | |
42 | #define LM95234_REG_STS_TCRIT1 0x08 | |
43 | #define LM95234_REG_STS_TCRIT2 0x09 | |
44 | #define LM95234_REG_TEMPH(x) ((x) + 0x10) | |
45 | #define LM95234_REG_TEMPL(x) ((x) + 0x20) | |
46 | #define LM95234_REG_UTEMPH(x) ((x) + 0x19) /* Remote only */ | |
47 | #define LM95234_REG_UTEMPL(x) ((x) + 0x29) | |
48 | #define LM95234_REG_REM_MODEL 0x30 | |
49 | #define LM95234_REG_REM_MODEL_STS 0x38 | |
50 | #define LM95234_REG_OFFSET(x) ((x) + 0x31) /* Remote only */ | |
51 | #define LM95234_REG_TCRIT1(x) ((x) + 0x40) | |
52 | #define LM95234_REG_TCRIT2(x) ((x) + 0x49) /* Remote channel 1,2 */ | |
53 | #define LM95234_REG_TCRIT_HYST 0x5a | |
54 | ||
55 | #define NATSEMI_MAN_ID 0x01 | |
56 | #define LM95234_CHIP_ID 0x79 | |
57 | ||
58 | /* Client data (each client gets its own) */ | |
59 | struct lm95234_data { | |
60 | struct device *hwmon_dev; | |
61 | struct mutex update_lock; | |
62 | unsigned long last_updated, interval; /* in jiffies */ | |
63 | bool valid; /* false until following fields are valid */ | |
64 | /* registers values */ | |
65 | int temp[5]; /* temperature (signed) */ | |
66 | u32 status; /* fault/alarm status */ | |
67 | u8 tcrit1[5]; /* critical temperature limit */ | |
68 | u8 tcrit2[2]; /* high temperature limit */ | |
69 | s8 toffset[4]; /* remote temperature offset */ | |
70 | u8 thyst; /* common hysteresis */ | |
71 | ||
72 | u8 sensor_type; /* temperature sensor type */ | |
73 | }; | |
74 | ||
75 | static int lm95234_read_temp(struct i2c_client *client, int index, int *t) | |
76 | { | |
77 | int val; | |
78 | u16 temp = 0; | |
79 | ||
80 | if (index) { | |
81 | val = i2c_smbus_read_byte_data(client, | |
82 | LM95234_REG_UTEMPH(index - 1)); | |
83 | if (val < 0) | |
84 | return val; | |
85 | temp = val << 8; | |
86 | val = i2c_smbus_read_byte_data(client, | |
87 | LM95234_REG_UTEMPL(index - 1)); | |
88 | if (val < 0) | |
89 | return val; | |
90 | temp |= val; | |
91 | *t = temp; | |
92 | } | |
93 | /* | |
94 | * Read signed temperature if unsigned temperature is 0, | |
95 | * or if this is the local sensor. | |
96 | */ | |
97 | if (!temp) { | |
98 | val = i2c_smbus_read_byte_data(client, | |
99 | LM95234_REG_TEMPH(index)); | |
100 | if (val < 0) | |
101 | return val; | |
102 | temp = val << 8; | |
103 | val = i2c_smbus_read_byte_data(client, | |
104 | LM95234_REG_TEMPL(index)); | |
105 | if (val < 0) | |
106 | return val; | |
107 | temp |= val; | |
108 | *t = (s16)temp; | |
109 | } | |
110 | return 0; | |
111 | } | |
112 | ||
113 | static u16 update_intervals[] = { 143, 364, 1000, 2500 }; | |
114 | ||
115 | /* Fill value cache. Must be called with update lock held. */ | |
116 | ||
117 | static int lm95234_fill_cache(struct i2c_client *client) | |
118 | { | |
119 | struct lm95234_data *data = i2c_get_clientdata(client); | |
120 | int i, ret; | |
121 | ||
122 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_CONVRATE); | |
123 | if (ret < 0) | |
124 | return ret; | |
125 | ||
126 | data->interval = msecs_to_jiffies(update_intervals[ret & 0x03]); | |
127 | ||
128 | for (i = 0; i < ARRAY_SIZE(data->tcrit1); i++) { | |
129 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT1(i)); | |
130 | if (ret < 0) | |
131 | return ret; | |
132 | data->tcrit1[i] = ret; | |
133 | } | |
134 | for (i = 0; i < ARRAY_SIZE(data->tcrit2); i++) { | |
135 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT2(i)); | |
136 | if (ret < 0) | |
137 | return ret; | |
138 | data->tcrit2[i] = ret; | |
139 | } | |
140 | for (i = 0; i < ARRAY_SIZE(data->toffset); i++) { | |
141 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_OFFSET(i)); | |
142 | if (ret < 0) | |
143 | return ret; | |
144 | data->toffset[i] = ret; | |
145 | } | |
146 | ||
147 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT_HYST); | |
148 | if (ret < 0) | |
149 | return ret; | |
150 | data->thyst = ret; | |
151 | ||
152 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); | |
153 | if (ret < 0) | |
154 | return ret; | |
155 | data->sensor_type = ret; | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
160 | static int lm95234_update_device(struct i2c_client *client, | |
161 | struct lm95234_data *data) | |
162 | { | |
163 | int ret; | |
164 | ||
165 | mutex_lock(&data->update_lock); | |
166 | ||
167 | if (time_after(jiffies, data->last_updated + data->interval) || | |
168 | !data->valid) { | |
169 | int i; | |
170 | ||
171 | if (!data->valid) { | |
172 | ret = lm95234_fill_cache(client); | |
173 | if (ret < 0) | |
174 | goto abort; | |
175 | } | |
176 | ||
177 | data->valid = false; | |
178 | for (i = 0; i < ARRAY_SIZE(data->temp); i++) { | |
179 | ret = lm95234_read_temp(client, i, &data->temp[i]); | |
180 | if (ret < 0) | |
181 | goto abort; | |
182 | } | |
183 | ||
184 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_FAULT); | |
185 | if (ret < 0) | |
186 | goto abort; | |
187 | data->status = ret; | |
188 | ||
189 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_TCRIT1); | |
190 | if (ret < 0) | |
191 | goto abort; | |
192 | data->status |= ret << 8; | |
193 | ||
194 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_TCRIT2); | |
195 | if (ret < 0) | |
196 | goto abort; | |
197 | data->status |= ret << 16; | |
198 | ||
199 | data->last_updated = jiffies; | |
200 | data->valid = true; | |
201 | } | |
202 | ret = 0; | |
203 | abort: | |
204 | mutex_unlock(&data->update_lock); | |
205 | ||
206 | return ret; | |
207 | } | |
208 | ||
209 | static ssize_t show_temp(struct device *dev, struct device_attribute *attr, | |
210 | char *buf) | |
211 | { | |
212 | struct i2c_client *client = to_i2c_client(dev); | |
213 | struct lm95234_data *data = i2c_get_clientdata(client); | |
214 | int index = to_sensor_dev_attr(attr)->index; | |
215 | int ret = lm95234_update_device(client, data); | |
216 | ||
217 | if (ret) | |
218 | return ret; | |
219 | ||
220 | return sprintf(buf, "%d\n", | |
221 | DIV_ROUND_CLOSEST(data->temp[index] * 125, 32)); | |
222 | } | |
223 | ||
224 | static ssize_t show_alarm(struct device *dev, | |
225 | struct device_attribute *attr, char *buf) | |
226 | { | |
227 | struct i2c_client *client = to_i2c_client(dev); | |
228 | struct lm95234_data *data = i2c_get_clientdata(client); | |
229 | u32 mask = to_sensor_dev_attr(attr)->index; | |
230 | int ret = lm95234_update_device(client, data); | |
231 | ||
232 | if (ret) | |
233 | return ret; | |
234 | ||
235 | return sprintf(buf, "%u", !!(data->status & mask)); | |
236 | } | |
237 | ||
238 | static ssize_t show_type(struct device *dev, struct device_attribute *attr, | |
239 | char *buf) | |
240 | { | |
241 | struct i2c_client *client = to_i2c_client(dev); | |
242 | struct lm95234_data *data = i2c_get_clientdata(client); | |
243 | u8 mask = to_sensor_dev_attr(attr)->index; | |
244 | int ret = lm95234_update_device(client, data); | |
245 | ||
246 | if (ret) | |
247 | return ret; | |
248 | ||
249 | return sprintf(buf, data->sensor_type & mask ? "1\n" : "2\n"); | |
250 | } | |
251 | ||
252 | static ssize_t set_type(struct device *dev, struct device_attribute *attr, | |
253 | const char *buf, size_t count) | |
254 | { | |
255 | struct i2c_client *client = to_i2c_client(dev); | |
256 | struct lm95234_data *data = i2c_get_clientdata(client); | |
257 | unsigned long val; | |
258 | u8 mask = to_sensor_dev_attr(attr)->index; | |
259 | int ret = lm95234_update_device(client, data); | |
260 | ||
261 | if (ret) | |
262 | return ret; | |
263 | ||
264 | ret = kstrtoul(buf, 10, &val); | |
265 | if (ret < 0) | |
266 | return ret; | |
267 | ||
268 | if (val != 1 && val != 2) | |
269 | return -EINVAL; | |
270 | ||
271 | mutex_lock(&data->update_lock); | |
272 | if (val == 1) | |
273 | data->sensor_type |= mask; | |
274 | else | |
275 | data->sensor_type &= ~mask; | |
276 | data->valid = false; | |
277 | i2c_smbus_write_byte_data(client, LM95234_REG_REM_MODEL, | |
278 | data->sensor_type); | |
279 | mutex_unlock(&data->update_lock); | |
280 | ||
281 | return count; | |
282 | } | |
283 | ||
284 | static ssize_t show_tcrit2(struct device *dev, struct device_attribute *attr, | |
285 | char *buf) | |
286 | { | |
287 | struct i2c_client *client = to_i2c_client(dev); | |
288 | struct lm95234_data *data = i2c_get_clientdata(client); | |
289 | int index = to_sensor_dev_attr(attr)->index; | |
290 | int ret = lm95234_update_device(client, data); | |
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 | { | |
301 | struct i2c_client *client = to_i2c_client(dev); | |
302 | struct lm95234_data *data = i2c_get_clientdata(client); | |
303 | int index = to_sensor_dev_attr(attr)->index; | |
304 | long val; | |
305 | int ret = lm95234_update_device(client, data); | |
306 | ||
307 | if (ret) | |
308 | return ret; | |
309 | ||
310 | ret = kstrtol(buf, 10, &val); | |
311 | if (ret < 0) | |
312 | return ret; | |
313 | ||
314 | val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, index ? 255 : 127); | |
315 | ||
316 | mutex_lock(&data->update_lock); | |
317 | data->tcrit2[index] = val; | |
318 | i2c_smbus_write_byte_data(client, LM95234_REG_TCRIT2(index), val); | |
319 | mutex_unlock(&data->update_lock); | |
320 | ||
321 | return count; | |
322 | } | |
323 | ||
324 | static ssize_t show_tcrit2_hyst(struct device *dev, | |
325 | struct device_attribute *attr, char *buf) | |
326 | { | |
327 | struct i2c_client *client = to_i2c_client(dev); | |
328 | struct lm95234_data *data = i2c_get_clientdata(client); | |
329 | int index = to_sensor_dev_attr(attr)->index; | |
330 | int ret = lm95234_update_device(client, data); | |
331 | ||
332 | if (ret) | |
333 | return ret; | |
334 | ||
335 | /* Result can be negative, so be careful with unsigned operands */ | |
336 | return sprintf(buf, "%d", | |
337 | ((int)data->tcrit2[index] - (int)data->thyst) * 1000); | |
338 | } | |
339 | ||
340 | static ssize_t show_tcrit1(struct device *dev, struct device_attribute *attr, | |
341 | char *buf) | |
342 | { | |
343 | struct i2c_client *client = to_i2c_client(dev); | |
344 | struct lm95234_data *data = i2c_get_clientdata(client); | |
345 | int index = to_sensor_dev_attr(attr)->index; | |
346 | ||
347 | return sprintf(buf, "%u", data->tcrit1[index] * 1000); | |
348 | } | |
349 | ||
350 | static ssize_t set_tcrit1(struct device *dev, struct device_attribute *attr, | |
351 | const char *buf, size_t count) | |
352 | { | |
353 | struct i2c_client *client = to_i2c_client(dev); | |
354 | struct lm95234_data *data = i2c_get_clientdata(client); | |
355 | int index = to_sensor_dev_attr(attr)->index; | |
356 | long val; | |
357 | int ret = lm95234_update_device(client, data); | |
358 | ||
359 | if (ret) | |
360 | return ret; | |
361 | ||
362 | ret = kstrtol(buf, 10, &val); | |
363 | if (ret < 0) | |
364 | return ret; | |
365 | ||
366 | val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, 255); | |
367 | ||
368 | mutex_lock(&data->update_lock); | |
369 | data->tcrit1[index] = val; | |
370 | i2c_smbus_write_byte_data(client, LM95234_REG_TCRIT1(index), val); | |
371 | mutex_unlock(&data->update_lock); | |
372 | ||
373 | return count; | |
374 | } | |
375 | ||
376 | static ssize_t show_tcrit1_hyst(struct device *dev, | |
377 | struct device_attribute *attr, char *buf) | |
378 | { | |
379 | struct i2c_client *client = to_i2c_client(dev); | |
380 | struct lm95234_data *data = i2c_get_clientdata(client); | |
381 | int index = to_sensor_dev_attr(attr)->index; | |
382 | int ret = lm95234_update_device(client, data); | |
383 | ||
384 | if (ret) | |
385 | return ret; | |
386 | ||
387 | /* Result can be negative, so be careful with unsigned operands */ | |
388 | return sprintf(buf, "%d", | |
389 | ((int)data->tcrit1[index] - (int)data->thyst) * 1000); | |
390 | } | |
391 | ||
392 | static ssize_t set_tcrit1_hyst(struct device *dev, | |
393 | struct device_attribute *attr, | |
394 | const char *buf, size_t count) | |
395 | { | |
396 | struct i2c_client *client = to_i2c_client(dev); | |
397 | struct lm95234_data *data = i2c_get_clientdata(client); | |
398 | int index = to_sensor_dev_attr(attr)->index; | |
399 | long val; | |
400 | int ret = lm95234_update_device(client, data); | |
401 | ||
402 | if (ret) | |
403 | return ret; | |
404 | ||
405 | ret = kstrtol(buf, 10, &val); | |
406 | if (ret < 0) | |
407 | return ret; | |
408 | ||
409 | val = DIV_ROUND_CLOSEST(val, 1000); | |
410 | val = clamp_val((int)data->tcrit1[index] - val, 0, 31); | |
411 | ||
412 | mutex_lock(&data->update_lock); | |
413 | data->thyst = val; | |
414 | i2c_smbus_write_byte_data(client, LM95234_REG_TCRIT_HYST, val); | |
415 | mutex_unlock(&data->update_lock); | |
416 | ||
417 | return count; | |
418 | } | |
419 | ||
420 | static ssize_t show_offset(struct device *dev, struct device_attribute *attr, | |
421 | char *buf) | |
422 | { | |
423 | struct i2c_client *client = to_i2c_client(dev); | |
424 | struct lm95234_data *data = i2c_get_clientdata(client); | |
425 | int index = to_sensor_dev_attr(attr)->index; | |
426 | int ret = lm95234_update_device(client, data); | |
427 | ||
428 | if (ret) | |
429 | return ret; | |
430 | ||
431 | return sprintf(buf, "%d", data->toffset[index] * 500); | |
432 | } | |
433 | ||
434 | static ssize_t set_offset(struct device *dev, struct device_attribute *attr, | |
435 | const char *buf, size_t count) | |
436 | { | |
437 | struct i2c_client *client = to_i2c_client(dev); | |
438 | struct lm95234_data *data = i2c_get_clientdata(client); | |
439 | int index = to_sensor_dev_attr(attr)->index; | |
440 | long val; | |
441 | int ret = lm95234_update_device(client, data); | |
442 | ||
443 | if (ret) | |
444 | return ret; | |
445 | ||
446 | ret = kstrtol(buf, 10, &val); | |
447 | if (ret < 0) | |
448 | return ret; | |
449 | ||
450 | /* Accuracy is 1/2 degrees C */ | |
451 | val = clamp_val(DIV_ROUND_CLOSEST(val, 500), -128, 127); | |
452 | ||
453 | mutex_lock(&data->update_lock); | |
454 | data->toffset[index] = val; | |
455 | i2c_smbus_write_byte_data(client, LM95234_REG_OFFSET(index), val); | |
456 | mutex_unlock(&data->update_lock); | |
457 | ||
458 | return count; | |
459 | } | |
460 | ||
461 | static ssize_t show_interval(struct device *dev, struct device_attribute *attr, | |
462 | char *buf) | |
463 | { | |
464 | struct i2c_client *client = to_i2c_client(dev); | |
465 | struct lm95234_data *data = i2c_get_clientdata(client); | |
466 | int ret = lm95234_update_device(client, data); | |
467 | ||
468 | if (ret) | |
469 | return ret; | |
470 | ||
471 | return sprintf(buf, "%lu\n", | |
472 | DIV_ROUND_CLOSEST(data->interval * 1000, HZ)); | |
473 | } | |
474 | ||
475 | static ssize_t set_interval(struct device *dev, struct device_attribute *attr, | |
476 | const char *buf, size_t count) | |
477 | { | |
478 | struct i2c_client *client = to_i2c_client(dev); | |
479 | struct lm95234_data *data = i2c_get_clientdata(client); | |
480 | unsigned long val; | |
481 | u8 regval; | |
482 | int ret = lm95234_update_device(client, data); | |
483 | ||
484 | if (ret) | |
485 | return ret; | |
486 | ||
487 | ret = kstrtoul(buf, 10, &val); | |
488 | if (ret < 0) | |
489 | return ret; | |
490 | ||
491 | for (regval = 0; regval < 3; regval++) { | |
492 | if (val <= update_intervals[regval]) | |
493 | break; | |
494 | } | |
495 | ||
496 | mutex_lock(&data->update_lock); | |
497 | data->interval = msecs_to_jiffies(update_intervals[regval]); | |
498 | i2c_smbus_write_byte_data(client, LM95234_REG_CONVRATE, regval); | |
499 | mutex_unlock(&data->update_lock); | |
500 | ||
501 | return count; | |
502 | } | |
503 | ||
504 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); | |
505 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); | |
506 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); | |
507 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); | |
508 | static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4); | |
509 | ||
510 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, | |
511 | BIT(0) | BIT(1)); | |
512 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, | |
513 | BIT(2) | BIT(3)); | |
514 | static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_alarm, NULL, | |
515 | BIT(4) | BIT(5)); | |
516 | static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_alarm, NULL, | |
517 | BIT(6) | BIT(7)); | |
518 | ||
519 | static SENSOR_DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, set_type, | |
520 | BIT(1)); | |
521 | static SENSOR_DEVICE_ATTR(temp3_type, S_IWUSR | S_IRUGO, show_type, set_type, | |
522 | BIT(2)); | |
523 | static SENSOR_DEVICE_ATTR(temp4_type, S_IWUSR | S_IRUGO, show_type, set_type, | |
524 | BIT(3)); | |
525 | static SENSOR_DEVICE_ATTR(temp5_type, S_IWUSR | S_IRUGO, show_type, set_type, | |
526 | BIT(4)); | |
527 | ||
528 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_tcrit1, | |
529 | set_tcrit1, 0); | |
530 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_tcrit2, | |
531 | set_tcrit2, 0); | |
532 | static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_tcrit2, | |
533 | set_tcrit2, 1); | |
534 | static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_tcrit1, | |
535 | set_tcrit1, 3); | |
536 | static SENSOR_DEVICE_ATTR(temp5_max, S_IWUSR | S_IRUGO, show_tcrit1, | |
537 | set_tcrit1, 4); | |
538 | ||
539 | static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_tcrit1_hyst, | |
540 | set_tcrit1_hyst, 0); | |
541 | static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO, show_tcrit2_hyst, NULL, 0); | |
542 | static SENSOR_DEVICE_ATTR(temp3_max_hyst, S_IRUGO, show_tcrit2_hyst, NULL, 1); | |
543 | static SENSOR_DEVICE_ATTR(temp4_max_hyst, S_IRUGO, show_tcrit1_hyst, NULL, 3); | |
544 | static SENSOR_DEVICE_ATTR(temp5_max_hyst, S_IRUGO, show_tcrit1_hyst, NULL, 4); | |
545 | ||
546 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, | |
547 | BIT(0 + 8)); | |
548 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, | |
549 | BIT(1 + 16)); | |
550 | static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, | |
551 | BIT(2 + 16)); | |
552 | static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_alarm, NULL, | |
553 | BIT(3 + 8)); | |
554 | static SENSOR_DEVICE_ATTR(temp5_max_alarm, S_IRUGO, show_alarm, NULL, | |
555 | BIT(4 + 8)); | |
556 | ||
557 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_tcrit1, | |
558 | set_tcrit1, 1); | |
559 | static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_tcrit1, | |
560 | set_tcrit1, 2); | |
561 | ||
562 | static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_tcrit1_hyst, NULL, 1); | |
563 | static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_tcrit1_hyst, NULL, 2); | |
564 | ||
565 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, | |
566 | BIT(1 + 8)); | |
567 | static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, | |
568 | BIT(2 + 8)); | |
569 | ||
570 | static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_offset, | |
571 | set_offset, 0); | |
572 | static SENSOR_DEVICE_ATTR(temp3_offset, S_IWUSR | S_IRUGO, show_offset, | |
573 | set_offset, 1); | |
574 | static SENSOR_DEVICE_ATTR(temp4_offset, S_IWUSR | S_IRUGO, show_offset, | |
575 | set_offset, 2); | |
576 | static SENSOR_DEVICE_ATTR(temp5_offset, S_IWUSR | S_IRUGO, show_offset, | |
577 | set_offset, 3); | |
578 | ||
579 | static DEVICE_ATTR(update_interval, S_IWUSR | S_IRUGO, show_interval, | |
580 | set_interval); | |
581 | ||
582 | static struct attribute *lm95234_attributes[] = { | |
583 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
584 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
585 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
586 | &sensor_dev_attr_temp4_input.dev_attr.attr, | |
587 | &sensor_dev_attr_temp5_input.dev_attr.attr, | |
588 | &sensor_dev_attr_temp2_fault.dev_attr.attr, | |
589 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
590 | &sensor_dev_attr_temp4_fault.dev_attr.attr, | |
591 | &sensor_dev_attr_temp5_fault.dev_attr.attr, | |
592 | &sensor_dev_attr_temp2_type.dev_attr.attr, | |
593 | &sensor_dev_attr_temp3_type.dev_attr.attr, | |
594 | &sensor_dev_attr_temp4_type.dev_attr.attr, | |
595 | &sensor_dev_attr_temp5_type.dev_attr.attr, | |
596 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
597 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
598 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
599 | &sensor_dev_attr_temp4_max.dev_attr.attr, | |
600 | &sensor_dev_attr_temp5_max.dev_attr.attr, | |
601 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, | |
602 | &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, | |
603 | &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, | |
604 | &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, | |
605 | &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, | |
606 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
607 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
608 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, | |
609 | &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, | |
610 | &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, | |
611 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
612 | &sensor_dev_attr_temp3_crit.dev_attr.attr, | |
613 | &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, | |
614 | &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, | |
615 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
616 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, | |
617 | &sensor_dev_attr_temp2_offset.dev_attr.attr, | |
618 | &sensor_dev_attr_temp3_offset.dev_attr.attr, | |
619 | &sensor_dev_attr_temp4_offset.dev_attr.attr, | |
620 | &sensor_dev_attr_temp5_offset.dev_attr.attr, | |
621 | &dev_attr_update_interval.attr, | |
622 | NULL | |
623 | }; | |
624 | ||
625 | static const struct attribute_group lm95234_group = { | |
626 | .attrs = lm95234_attributes, | |
627 | }; | |
628 | ||
629 | static int lm95234_detect(struct i2c_client *client, | |
630 | struct i2c_board_info *info) | |
631 | { | |
632 | struct i2c_adapter *adapter = client->adapter; | |
633 | int mfg_id, chip_id, val; | |
634 | ||
635 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
636 | return -ENODEV; | |
637 | ||
638 | mfg_id = i2c_smbus_read_byte_data(client, LM95234_REG_MAN_ID); | |
639 | if (mfg_id != NATSEMI_MAN_ID) | |
640 | return -ENODEV; | |
641 | ||
642 | chip_id = i2c_smbus_read_byte_data(client, LM95234_REG_CHIP_ID); | |
643 | if (chip_id != LM95234_CHIP_ID) | |
644 | return -ENODEV; | |
645 | ||
646 | val = i2c_smbus_read_byte_data(client, LM95234_REG_STATUS); | |
647 | if (val & 0x30) | |
648 | return -ENODEV; | |
649 | ||
650 | val = i2c_smbus_read_byte_data(client, LM95234_REG_CONFIG); | |
651 | if (val & 0xbc) | |
652 | return -ENODEV; | |
653 | ||
654 | val = i2c_smbus_read_byte_data(client, LM95234_REG_CONVRATE); | |
655 | if (val & 0xfc) | |
656 | return -ENODEV; | |
657 | ||
658 | val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); | |
659 | if (val & 0xe1) | |
660 | return -ENODEV; | |
661 | ||
662 | val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL_STS); | |
663 | if (val & 0xe1) | |
664 | return -ENODEV; | |
665 | ||
666 | strlcpy(info->type, "lm95234", I2C_NAME_SIZE); | |
667 | return 0; | |
668 | } | |
669 | ||
670 | static int lm95234_init_client(struct i2c_client *client) | |
671 | { | |
672 | int val, model; | |
673 | ||
674 | /* start conversion if necessary */ | |
675 | val = i2c_smbus_read_byte_data(client, LM95234_REG_CONFIG); | |
676 | if (val < 0) | |
677 | return val; | |
678 | if (val & 0x40) | |
679 | i2c_smbus_write_byte_data(client, LM95234_REG_CONFIG, | |
680 | val & ~0x40); | |
681 | ||
682 | /* If diode type status reports an error, try to fix it */ | |
683 | val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL_STS); | |
684 | if (val < 0) | |
685 | return val; | |
686 | model = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); | |
687 | if (model < 0) | |
688 | return model; | |
689 | if (model & val) { | |
690 | dev_notice(&client->dev, | |
691 | "Fixing remote diode type misconfiguration (0x%x)\n", | |
692 | val); | |
693 | i2c_smbus_write_byte_data(client, LM95234_REG_REM_MODEL, | |
694 | model & ~val); | |
695 | } | |
696 | return 0; | |
697 | } | |
698 | ||
699 | static int lm95234_probe(struct i2c_client *client, | |
700 | const struct i2c_device_id *id) | |
701 | { | |
702 | struct device *dev = &client->dev; | |
703 | struct lm95234_data *data; | |
704 | int err; | |
705 | ||
706 | data = devm_kzalloc(dev, sizeof(struct lm95234_data), GFP_KERNEL); | |
707 | if (!data) | |
708 | return -ENOMEM; | |
709 | ||
710 | i2c_set_clientdata(client, data); | |
711 | mutex_init(&data->update_lock); | |
712 | ||
713 | /* Initialize the LM95234 chip */ | |
714 | err = lm95234_init_client(client); | |
715 | if (err < 0) | |
716 | return err; | |
717 | ||
718 | /* Register sysfs hooks */ | |
719 | err = sysfs_create_group(&dev->kobj, &lm95234_group); | |
720 | if (err) | |
721 | return err; | |
722 | ||
723 | data->hwmon_dev = hwmon_device_register(dev); | |
724 | if (IS_ERR(data->hwmon_dev)) { | |
725 | err = PTR_ERR(data->hwmon_dev); | |
726 | goto exit_remove_files; | |
727 | } | |
728 | ||
729 | return 0; | |
730 | ||
731 | exit_remove_files: | |
732 | sysfs_remove_group(&dev->kobj, &lm95234_group); | |
733 | return err; | |
734 | } | |
735 | ||
736 | static int lm95234_remove(struct i2c_client *client) | |
737 | { | |
738 | struct lm95234_data *data = i2c_get_clientdata(client); | |
739 | ||
740 | hwmon_device_unregister(data->hwmon_dev); | |
741 | sysfs_remove_group(&client->dev.kobj, &lm95234_group); | |
742 | ||
743 | return 0; | |
744 | } | |
745 | ||
746 | /* Driver data (common to all clients) */ | |
747 | static const struct i2c_device_id lm95234_id[] = { | |
748 | { "lm95234", 0 }, | |
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, | |
759 | .remove = lm95234_remove, | |
760 | .id_table = lm95234_id, | |
761 | .detect = lm95234_detect, | |
762 | .address_list = normal_i2c, | |
763 | }; | |
764 | ||
765 | module_i2c_driver(lm95234_driver); | |
766 | ||
767 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); | |
768 | MODULE_DESCRIPTION("LM95234 sensor driver"); | |
769 | MODULE_LICENSE("GPL"); |