]>
Commit | Line | Data |
---|---|---|
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 { | |
9d86bd6b | 60 | struct i2c_client *client; |
e1eb4906 GR |
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 | ||
9d86bd6b GR |
117 | static int lm95234_fill_cache(struct lm95234_data *data, |
118 | struct i2c_client *client) | |
e1eb4906 | 119 | { |
e1eb4906 GR |
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 | ||
9d86bd6b | 160 | static int lm95234_update_device(struct lm95234_data *data) |
e1eb4906 | 161 | { |
9d86bd6b | 162 | struct i2c_client *client = data->client; |
e1eb4906 GR |
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) { | |
9d86bd6b | 172 | ret = lm95234_fill_cache(data, client); |
e1eb4906 GR |
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 | { | |
9d86bd6b | 212 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 213 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 214 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
215 | |
216 | if (ret) | |
217 | return ret; | |
218 | ||
219 | return sprintf(buf, "%d\n", | |
220 | DIV_ROUND_CLOSEST(data->temp[index] * 125, 32)); | |
221 | } | |
222 | ||
223 | static ssize_t show_alarm(struct device *dev, | |
224 | struct device_attribute *attr, char *buf) | |
225 | { | |
9d86bd6b | 226 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 227 | u32 mask = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 228 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
229 | |
230 | if (ret) | |
231 | return ret; | |
232 | ||
233 | return sprintf(buf, "%u", !!(data->status & mask)); | |
234 | } | |
235 | ||
236 | static ssize_t show_type(struct device *dev, struct device_attribute *attr, | |
237 | char *buf) | |
238 | { | |
9d86bd6b | 239 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 240 | u8 mask = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 241 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
242 | |
243 | if (ret) | |
244 | return ret; | |
245 | ||
246 | return sprintf(buf, data->sensor_type & mask ? "1\n" : "2\n"); | |
247 | } | |
248 | ||
249 | static ssize_t set_type(struct device *dev, struct device_attribute *attr, | |
250 | const char *buf, size_t count) | |
251 | { | |
9d86bd6b | 252 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 GR |
253 | unsigned long val; |
254 | u8 mask = to_sensor_dev_attr(attr)->index; | |
9d86bd6b | 255 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
256 | |
257 | if (ret) | |
258 | return ret; | |
259 | ||
260 | ret = kstrtoul(buf, 10, &val); | |
261 | if (ret < 0) | |
262 | return ret; | |
263 | ||
264 | if (val != 1 && val != 2) | |
265 | return -EINVAL; | |
266 | ||
267 | mutex_lock(&data->update_lock); | |
268 | if (val == 1) | |
269 | data->sensor_type |= mask; | |
270 | else | |
271 | data->sensor_type &= ~mask; | |
272 | data->valid = false; | |
9d86bd6b | 273 | i2c_smbus_write_byte_data(data->client, LM95234_REG_REM_MODEL, |
e1eb4906 GR |
274 | data->sensor_type); |
275 | mutex_unlock(&data->update_lock); | |
276 | ||
277 | return count; | |
278 | } | |
279 | ||
280 | static ssize_t show_tcrit2(struct device *dev, struct device_attribute *attr, | |
281 | char *buf) | |
282 | { | |
9d86bd6b | 283 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 284 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 285 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
286 | |
287 | if (ret) | |
288 | return ret; | |
289 | ||
290 | return sprintf(buf, "%u", data->tcrit2[index] * 1000); | |
291 | } | |
292 | ||
293 | static ssize_t set_tcrit2(struct device *dev, struct device_attribute *attr, | |
294 | const char *buf, size_t count) | |
295 | { | |
9d86bd6b | 296 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 GR |
297 | int index = to_sensor_dev_attr(attr)->index; |
298 | long val; | |
9d86bd6b | 299 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
300 | |
301 | if (ret) | |
302 | return ret; | |
303 | ||
304 | ret = kstrtol(buf, 10, &val); | |
305 | if (ret < 0) | |
306 | return ret; | |
307 | ||
308 | val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, index ? 255 : 127); | |
309 | ||
310 | mutex_lock(&data->update_lock); | |
311 | data->tcrit2[index] = val; | |
9d86bd6b | 312 | i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT2(index), val); |
e1eb4906 GR |
313 | mutex_unlock(&data->update_lock); |
314 | ||
315 | return count; | |
316 | } | |
317 | ||
318 | static ssize_t show_tcrit2_hyst(struct device *dev, | |
319 | struct device_attribute *attr, char *buf) | |
320 | { | |
9d86bd6b | 321 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 322 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 323 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
324 | |
325 | if (ret) | |
326 | return ret; | |
327 | ||
328 | /* Result can be negative, so be careful with unsigned operands */ | |
329 | return sprintf(buf, "%d", | |
330 | ((int)data->tcrit2[index] - (int)data->thyst) * 1000); | |
331 | } | |
332 | ||
333 | static ssize_t show_tcrit1(struct device *dev, struct device_attribute *attr, | |
334 | char *buf) | |
335 | { | |
9d86bd6b | 336 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 GR |
337 | int index = to_sensor_dev_attr(attr)->index; |
338 | ||
339 | return sprintf(buf, "%u", data->tcrit1[index] * 1000); | |
340 | } | |
341 | ||
342 | static ssize_t set_tcrit1(struct device *dev, struct device_attribute *attr, | |
343 | const char *buf, size_t count) | |
344 | { | |
9d86bd6b | 345 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 346 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 347 | int ret = lm95234_update_device(data); |
e1eb4906 | 348 | long val; |
e1eb4906 GR |
349 | |
350 | if (ret) | |
351 | return ret; | |
352 | ||
353 | ret = kstrtol(buf, 10, &val); | |
354 | if (ret < 0) | |
355 | return ret; | |
356 | ||
357 | val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, 255); | |
358 | ||
359 | mutex_lock(&data->update_lock); | |
360 | data->tcrit1[index] = val; | |
9d86bd6b | 361 | i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT1(index), val); |
e1eb4906 GR |
362 | mutex_unlock(&data->update_lock); |
363 | ||
364 | return count; | |
365 | } | |
366 | ||
367 | static ssize_t show_tcrit1_hyst(struct device *dev, | |
368 | struct device_attribute *attr, char *buf) | |
369 | { | |
9d86bd6b | 370 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 371 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 372 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
373 | |
374 | if (ret) | |
375 | return ret; | |
376 | ||
377 | /* Result can be negative, so be careful with unsigned operands */ | |
378 | return sprintf(buf, "%d", | |
379 | ((int)data->tcrit1[index] - (int)data->thyst) * 1000); | |
380 | } | |
381 | ||
382 | static ssize_t set_tcrit1_hyst(struct device *dev, | |
383 | struct device_attribute *attr, | |
384 | const char *buf, size_t count) | |
385 | { | |
9d86bd6b | 386 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 387 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 388 | int ret = lm95234_update_device(data); |
e1eb4906 | 389 | long val; |
e1eb4906 GR |
390 | |
391 | if (ret) | |
392 | return ret; | |
393 | ||
394 | ret = kstrtol(buf, 10, &val); | |
395 | if (ret < 0) | |
396 | return ret; | |
397 | ||
398 | val = DIV_ROUND_CLOSEST(val, 1000); | |
399 | val = clamp_val((int)data->tcrit1[index] - val, 0, 31); | |
400 | ||
401 | mutex_lock(&data->update_lock); | |
402 | data->thyst = val; | |
9d86bd6b | 403 | i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT_HYST, val); |
e1eb4906 GR |
404 | mutex_unlock(&data->update_lock); |
405 | ||
406 | return count; | |
407 | } | |
408 | ||
409 | static ssize_t show_offset(struct device *dev, struct device_attribute *attr, | |
410 | char *buf) | |
411 | { | |
9d86bd6b | 412 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 413 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 414 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
415 | |
416 | if (ret) | |
417 | return ret; | |
418 | ||
419 | return sprintf(buf, "%d", data->toffset[index] * 500); | |
420 | } | |
421 | ||
422 | static ssize_t set_offset(struct device *dev, struct device_attribute *attr, | |
423 | const char *buf, size_t count) | |
424 | { | |
9d86bd6b | 425 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 426 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 427 | int ret = lm95234_update_device(data); |
e1eb4906 | 428 | long val; |
e1eb4906 GR |
429 | |
430 | if (ret) | |
431 | return ret; | |
432 | ||
433 | ret = kstrtol(buf, 10, &val); | |
434 | if (ret < 0) | |
435 | return ret; | |
436 | ||
437 | /* Accuracy is 1/2 degrees C */ | |
438 | val = clamp_val(DIV_ROUND_CLOSEST(val, 500), -128, 127); | |
439 | ||
440 | mutex_lock(&data->update_lock); | |
441 | data->toffset[index] = val; | |
9d86bd6b | 442 | i2c_smbus_write_byte_data(data->client, LM95234_REG_OFFSET(index), val); |
e1eb4906 GR |
443 | mutex_unlock(&data->update_lock); |
444 | ||
445 | return count; | |
446 | } | |
447 | ||
448 | static ssize_t show_interval(struct device *dev, struct device_attribute *attr, | |
449 | char *buf) | |
450 | { | |
9d86bd6b GR |
451 | struct lm95234_data *data = dev_get_drvdata(dev); |
452 | int ret = lm95234_update_device(data); | |
e1eb4906 GR |
453 | |
454 | if (ret) | |
455 | return ret; | |
456 | ||
457 | return sprintf(buf, "%lu\n", | |
458 | DIV_ROUND_CLOSEST(data->interval * 1000, HZ)); | |
459 | } | |
460 | ||
461 | static ssize_t set_interval(struct device *dev, struct device_attribute *attr, | |
462 | const char *buf, size_t count) | |
463 | { | |
9d86bd6b GR |
464 | struct lm95234_data *data = dev_get_drvdata(dev); |
465 | int ret = lm95234_update_device(data); | |
e1eb4906 GR |
466 | unsigned long val; |
467 | u8 regval; | |
e1eb4906 GR |
468 | |
469 | if (ret) | |
470 | return ret; | |
471 | ||
472 | ret = kstrtoul(buf, 10, &val); | |
473 | if (ret < 0) | |
474 | return ret; | |
475 | ||
476 | for (regval = 0; regval < 3; regval++) { | |
477 | if (val <= update_intervals[regval]) | |
478 | break; | |
479 | } | |
480 | ||
481 | mutex_lock(&data->update_lock); | |
482 | data->interval = msecs_to_jiffies(update_intervals[regval]); | |
9d86bd6b | 483 | i2c_smbus_write_byte_data(data->client, LM95234_REG_CONVRATE, regval); |
e1eb4906 GR |
484 | mutex_unlock(&data->update_lock); |
485 | ||
486 | return count; | |
487 | } | |
488 | ||
489 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); | |
490 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); | |
491 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); | |
492 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); | |
493 | static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4); | |
494 | ||
495 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, | |
496 | BIT(0) | BIT(1)); | |
497 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, | |
498 | BIT(2) | BIT(3)); | |
499 | static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_alarm, NULL, | |
500 | BIT(4) | BIT(5)); | |
501 | static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_alarm, NULL, | |
502 | BIT(6) | BIT(7)); | |
503 | ||
504 | static SENSOR_DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, set_type, | |
505 | BIT(1)); | |
506 | static SENSOR_DEVICE_ATTR(temp3_type, S_IWUSR | S_IRUGO, show_type, set_type, | |
507 | BIT(2)); | |
508 | static SENSOR_DEVICE_ATTR(temp4_type, S_IWUSR | S_IRUGO, show_type, set_type, | |
509 | BIT(3)); | |
510 | static SENSOR_DEVICE_ATTR(temp5_type, S_IWUSR | S_IRUGO, show_type, set_type, | |
511 | BIT(4)); | |
512 | ||
513 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_tcrit1, | |
514 | set_tcrit1, 0); | |
515 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_tcrit2, | |
516 | set_tcrit2, 0); | |
517 | static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_tcrit2, | |
518 | set_tcrit2, 1); | |
519 | static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_tcrit1, | |
520 | set_tcrit1, 3); | |
521 | static SENSOR_DEVICE_ATTR(temp5_max, S_IWUSR | S_IRUGO, show_tcrit1, | |
522 | set_tcrit1, 4); | |
523 | ||
524 | static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_tcrit1_hyst, | |
525 | set_tcrit1_hyst, 0); | |
526 | static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO, show_tcrit2_hyst, NULL, 0); | |
527 | static SENSOR_DEVICE_ATTR(temp3_max_hyst, S_IRUGO, show_tcrit2_hyst, NULL, 1); | |
528 | static SENSOR_DEVICE_ATTR(temp4_max_hyst, S_IRUGO, show_tcrit1_hyst, NULL, 3); | |
529 | static SENSOR_DEVICE_ATTR(temp5_max_hyst, S_IRUGO, show_tcrit1_hyst, NULL, 4); | |
530 | ||
531 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, | |
532 | BIT(0 + 8)); | |
533 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, | |
534 | BIT(1 + 16)); | |
535 | static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, | |
536 | BIT(2 + 16)); | |
537 | static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_alarm, NULL, | |
538 | BIT(3 + 8)); | |
539 | static SENSOR_DEVICE_ATTR(temp5_max_alarm, S_IRUGO, show_alarm, NULL, | |
540 | BIT(4 + 8)); | |
541 | ||
542 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_tcrit1, | |
543 | set_tcrit1, 1); | |
544 | static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_tcrit1, | |
545 | set_tcrit1, 2); | |
546 | ||
547 | static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_tcrit1_hyst, NULL, 1); | |
548 | static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_tcrit1_hyst, NULL, 2); | |
549 | ||
550 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, | |
551 | BIT(1 + 8)); | |
552 | static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, | |
553 | BIT(2 + 8)); | |
554 | ||
555 | static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_offset, | |
556 | set_offset, 0); | |
557 | static SENSOR_DEVICE_ATTR(temp3_offset, S_IWUSR | S_IRUGO, show_offset, | |
558 | set_offset, 1); | |
559 | static SENSOR_DEVICE_ATTR(temp4_offset, S_IWUSR | S_IRUGO, show_offset, | |
560 | set_offset, 2); | |
561 | static SENSOR_DEVICE_ATTR(temp5_offset, S_IWUSR | S_IRUGO, show_offset, | |
562 | set_offset, 3); | |
563 | ||
564 | static DEVICE_ATTR(update_interval, S_IWUSR | S_IRUGO, show_interval, | |
565 | set_interval); | |
566 | ||
9d86bd6b | 567 | static struct attribute *lm95234_attrs[] = { |
e1eb4906 GR |
568 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
569 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
570 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
571 | &sensor_dev_attr_temp4_input.dev_attr.attr, | |
572 | &sensor_dev_attr_temp5_input.dev_attr.attr, | |
573 | &sensor_dev_attr_temp2_fault.dev_attr.attr, | |
574 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
575 | &sensor_dev_attr_temp4_fault.dev_attr.attr, | |
576 | &sensor_dev_attr_temp5_fault.dev_attr.attr, | |
577 | &sensor_dev_attr_temp2_type.dev_attr.attr, | |
578 | &sensor_dev_attr_temp3_type.dev_attr.attr, | |
579 | &sensor_dev_attr_temp4_type.dev_attr.attr, | |
580 | &sensor_dev_attr_temp5_type.dev_attr.attr, | |
581 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
582 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
583 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
584 | &sensor_dev_attr_temp4_max.dev_attr.attr, | |
585 | &sensor_dev_attr_temp5_max.dev_attr.attr, | |
586 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, | |
587 | &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, | |
588 | &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, | |
589 | &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, | |
590 | &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, | |
591 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
592 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
593 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, | |
594 | &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, | |
595 | &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, | |
596 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
597 | &sensor_dev_attr_temp3_crit.dev_attr.attr, | |
598 | &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, | |
599 | &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, | |
600 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
601 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, | |
602 | &sensor_dev_attr_temp2_offset.dev_attr.attr, | |
603 | &sensor_dev_attr_temp3_offset.dev_attr.attr, | |
604 | &sensor_dev_attr_temp4_offset.dev_attr.attr, | |
605 | &sensor_dev_attr_temp5_offset.dev_attr.attr, | |
606 | &dev_attr_update_interval.attr, | |
607 | NULL | |
608 | }; | |
9d86bd6b | 609 | ATTRIBUTE_GROUPS(lm95234); |
e1eb4906 GR |
610 | |
611 | static int lm95234_detect(struct i2c_client *client, | |
612 | struct i2c_board_info *info) | |
613 | { | |
614 | struct i2c_adapter *adapter = client->adapter; | |
615 | int mfg_id, chip_id, val; | |
616 | ||
617 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
618 | return -ENODEV; | |
619 | ||
620 | mfg_id = i2c_smbus_read_byte_data(client, LM95234_REG_MAN_ID); | |
621 | if (mfg_id != NATSEMI_MAN_ID) | |
622 | return -ENODEV; | |
623 | ||
624 | chip_id = i2c_smbus_read_byte_data(client, LM95234_REG_CHIP_ID); | |
625 | if (chip_id != LM95234_CHIP_ID) | |
626 | return -ENODEV; | |
627 | ||
628 | val = i2c_smbus_read_byte_data(client, LM95234_REG_STATUS); | |
629 | if (val & 0x30) | |
630 | return -ENODEV; | |
631 | ||
632 | val = i2c_smbus_read_byte_data(client, LM95234_REG_CONFIG); | |
633 | if (val & 0xbc) | |
634 | return -ENODEV; | |
635 | ||
636 | val = i2c_smbus_read_byte_data(client, LM95234_REG_CONVRATE); | |
637 | if (val & 0xfc) | |
638 | return -ENODEV; | |
639 | ||
640 | val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); | |
641 | if (val & 0xe1) | |
642 | return -ENODEV; | |
643 | ||
644 | val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL_STS); | |
645 | if (val & 0xe1) | |
646 | return -ENODEV; | |
647 | ||
648 | strlcpy(info->type, "lm95234", I2C_NAME_SIZE); | |
649 | return 0; | |
650 | } | |
651 | ||
652 | static int lm95234_init_client(struct i2c_client *client) | |
653 | { | |
654 | int val, model; | |
655 | ||
656 | /* start conversion if necessary */ | |
657 | val = i2c_smbus_read_byte_data(client, LM95234_REG_CONFIG); | |
658 | if (val < 0) | |
659 | return val; | |
660 | if (val & 0x40) | |
661 | i2c_smbus_write_byte_data(client, LM95234_REG_CONFIG, | |
662 | val & ~0x40); | |
663 | ||
664 | /* If diode type status reports an error, try to fix it */ | |
665 | val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL_STS); | |
666 | if (val < 0) | |
667 | return val; | |
668 | model = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); | |
669 | if (model < 0) | |
670 | return model; | |
671 | if (model & val) { | |
672 | dev_notice(&client->dev, | |
673 | "Fixing remote diode type misconfiguration (0x%x)\n", | |
674 | val); | |
675 | i2c_smbus_write_byte_data(client, LM95234_REG_REM_MODEL, | |
676 | model & ~val); | |
677 | } | |
678 | return 0; | |
679 | } | |
680 | ||
681 | static int lm95234_probe(struct i2c_client *client, | |
682 | const struct i2c_device_id *id) | |
683 | { | |
684 | struct device *dev = &client->dev; | |
685 | struct lm95234_data *data; | |
9d86bd6b | 686 | struct device *hwmon_dev; |
e1eb4906 GR |
687 | int err; |
688 | ||
689 | data = devm_kzalloc(dev, sizeof(struct lm95234_data), GFP_KERNEL); | |
690 | if (!data) | |
691 | return -ENOMEM; | |
692 | ||
9d86bd6b | 693 | data->client = client; |
e1eb4906 GR |
694 | mutex_init(&data->update_lock); |
695 | ||
696 | /* Initialize the LM95234 chip */ | |
697 | err = lm95234_init_client(client); | |
698 | if (err < 0) | |
699 | return err; | |
700 | ||
9d86bd6b GR |
701 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
702 | data, | |
703 | lm95234_groups); | |
3ea85ba7 | 704 | return PTR_ERR_OR_ZERO(hwmon_dev); |
e1eb4906 GR |
705 | } |
706 | ||
707 | /* Driver data (common to all clients) */ | |
708 | static const struct i2c_device_id lm95234_id[] = { | |
709 | { "lm95234", 0 }, | |
710 | { } | |
711 | }; | |
712 | MODULE_DEVICE_TABLE(i2c, lm95234_id); | |
713 | ||
714 | static struct i2c_driver lm95234_driver = { | |
715 | .class = I2C_CLASS_HWMON, | |
716 | .driver = { | |
717 | .name = DRVNAME, | |
718 | }, | |
719 | .probe = lm95234_probe, | |
e1eb4906 GR |
720 | .id_table = lm95234_id, |
721 | .detect = lm95234_detect, | |
722 | .address_list = normal_i2c, | |
723 | }; | |
724 | ||
725 | module_i2c_driver(lm95234_driver); | |
726 | ||
727 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); | |
728 | MODULE_DESCRIPTION("LM95234 sensor driver"); | |
729 | MODULE_LICENSE("GPL"); |