Commit | Line | Data |
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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
e1eb4906 GR |
2 | /* |
3 | * Driver for Texas Instruments / National Semiconductor LM95234 | |
4 | * | |
dfcd4c53 | 5 | * Copyright (c) 2013, 2014 Guenter Roeck <linux@roeck-us.net> |
e1eb4906 GR |
6 | * |
7 | * Derived from lm95241.c | |
8 | * Copyright (C) 2008, 2010 Davide Rizzo <elpa.rizzo@gmail.com> | |
e1eb4906 GR |
9 | */ |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/jiffies.h> | |
15 | #include <linux/i2c.h> | |
16 | #include <linux/hwmon.h> | |
17 | #include <linux/hwmon-sysfs.h> | |
18 | #include <linux/err.h> | |
19 | #include <linux/mutex.h> | |
20 | #include <linux/sysfs.h> | |
21 | ||
22 | #define DRVNAME "lm95234" | |
23 | ||
dfcd4c53 GR |
24 | enum chips { lm95233, lm95234 }; |
25 | ||
26 | static const unsigned short normal_i2c[] = { | |
27 | 0x18, 0x2a, 0x2b, 0x4d, 0x4e, I2C_CLIENT_END }; | |
e1eb4906 GR |
28 | |
29 | /* LM95234 registers */ | |
30 | #define LM95234_REG_MAN_ID 0xFE | |
31 | #define LM95234_REG_CHIP_ID 0xFF | |
32 | #define LM95234_REG_STATUS 0x02 | |
33 | #define LM95234_REG_CONFIG 0x03 | |
34 | #define LM95234_REG_CONVRATE 0x04 | |
35 | #define LM95234_REG_STS_FAULT 0x07 | |
36 | #define LM95234_REG_STS_TCRIT1 0x08 | |
37 | #define LM95234_REG_STS_TCRIT2 0x09 | |
38 | #define LM95234_REG_TEMPH(x) ((x) + 0x10) | |
39 | #define LM95234_REG_TEMPL(x) ((x) + 0x20) | |
40 | #define LM95234_REG_UTEMPH(x) ((x) + 0x19) /* Remote only */ | |
41 | #define LM95234_REG_UTEMPL(x) ((x) + 0x29) | |
42 | #define LM95234_REG_REM_MODEL 0x30 | |
43 | #define LM95234_REG_REM_MODEL_STS 0x38 | |
44 | #define LM95234_REG_OFFSET(x) ((x) + 0x31) /* Remote only */ | |
45 | #define LM95234_REG_TCRIT1(x) ((x) + 0x40) | |
46 | #define LM95234_REG_TCRIT2(x) ((x) + 0x49) /* Remote channel 1,2 */ | |
47 | #define LM95234_REG_TCRIT_HYST 0x5a | |
48 | ||
49 | #define NATSEMI_MAN_ID 0x01 | |
dfcd4c53 | 50 | #define LM95233_CHIP_ID 0x89 |
e1eb4906 GR |
51 | #define LM95234_CHIP_ID 0x79 |
52 | ||
53 | /* Client data (each client gets its own) */ | |
54 | struct lm95234_data { | |
9d86bd6b | 55 | struct i2c_client *client; |
dfcd4c53 | 56 | const struct attribute_group *groups[3]; |
e1eb4906 GR |
57 | struct mutex update_lock; |
58 | unsigned long last_updated, interval; /* in jiffies */ | |
59 | bool valid; /* false until following fields are valid */ | |
60 | /* registers values */ | |
61 | int temp[5]; /* temperature (signed) */ | |
62 | u32 status; /* fault/alarm status */ | |
63 | u8 tcrit1[5]; /* critical temperature limit */ | |
64 | u8 tcrit2[2]; /* high temperature limit */ | |
65 | s8 toffset[4]; /* remote temperature offset */ | |
66 | u8 thyst; /* common hysteresis */ | |
67 | ||
68 | u8 sensor_type; /* temperature sensor type */ | |
69 | }; | |
70 | ||
71 | static int lm95234_read_temp(struct i2c_client *client, int index, int *t) | |
72 | { | |
73 | int val; | |
74 | u16 temp = 0; | |
75 | ||
76 | if (index) { | |
77 | val = i2c_smbus_read_byte_data(client, | |
78 | LM95234_REG_UTEMPH(index - 1)); | |
79 | if (val < 0) | |
80 | return val; | |
81 | temp = val << 8; | |
82 | val = i2c_smbus_read_byte_data(client, | |
83 | LM95234_REG_UTEMPL(index - 1)); | |
84 | if (val < 0) | |
85 | return val; | |
86 | temp |= val; | |
87 | *t = temp; | |
88 | } | |
89 | /* | |
90 | * Read signed temperature if unsigned temperature is 0, | |
91 | * or if this is the local sensor. | |
92 | */ | |
93 | if (!temp) { | |
94 | val = i2c_smbus_read_byte_data(client, | |
95 | LM95234_REG_TEMPH(index)); | |
96 | if (val < 0) | |
97 | return val; | |
98 | temp = val << 8; | |
99 | val = i2c_smbus_read_byte_data(client, | |
100 | LM95234_REG_TEMPL(index)); | |
101 | if (val < 0) | |
102 | return val; | |
103 | temp |= val; | |
104 | *t = (s16)temp; | |
105 | } | |
106 | return 0; | |
107 | } | |
108 | ||
109 | static u16 update_intervals[] = { 143, 364, 1000, 2500 }; | |
110 | ||
111 | /* Fill value cache. Must be called with update lock held. */ | |
112 | ||
9d86bd6b GR |
113 | static int lm95234_fill_cache(struct lm95234_data *data, |
114 | struct i2c_client *client) | |
e1eb4906 | 115 | { |
e1eb4906 GR |
116 | int i, ret; |
117 | ||
118 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_CONVRATE); | |
119 | if (ret < 0) | |
120 | return ret; | |
121 | ||
122 | data->interval = msecs_to_jiffies(update_intervals[ret & 0x03]); | |
123 | ||
124 | for (i = 0; i < ARRAY_SIZE(data->tcrit1); i++) { | |
125 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT1(i)); | |
126 | if (ret < 0) | |
127 | return ret; | |
128 | data->tcrit1[i] = ret; | |
129 | } | |
130 | for (i = 0; i < ARRAY_SIZE(data->tcrit2); i++) { | |
131 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT2(i)); | |
132 | if (ret < 0) | |
133 | return ret; | |
134 | data->tcrit2[i] = ret; | |
135 | } | |
136 | for (i = 0; i < ARRAY_SIZE(data->toffset); i++) { | |
137 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_OFFSET(i)); | |
138 | if (ret < 0) | |
139 | return ret; | |
140 | data->toffset[i] = ret; | |
141 | } | |
142 | ||
143 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT_HYST); | |
144 | if (ret < 0) | |
145 | return ret; | |
146 | data->thyst = ret; | |
147 | ||
148 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); | |
149 | if (ret < 0) | |
150 | return ret; | |
151 | data->sensor_type = ret; | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
9d86bd6b | 156 | static int lm95234_update_device(struct lm95234_data *data) |
e1eb4906 | 157 | { |
9d86bd6b | 158 | struct i2c_client *client = data->client; |
e1eb4906 GR |
159 | int ret; |
160 | ||
161 | mutex_lock(&data->update_lock); | |
162 | ||
163 | if (time_after(jiffies, data->last_updated + data->interval) || | |
164 | !data->valid) { | |
165 | int i; | |
166 | ||
167 | if (!data->valid) { | |
9d86bd6b | 168 | ret = lm95234_fill_cache(data, client); |
e1eb4906 GR |
169 | if (ret < 0) |
170 | goto abort; | |
171 | } | |
172 | ||
173 | data->valid = false; | |
174 | for (i = 0; i < ARRAY_SIZE(data->temp); i++) { | |
175 | ret = lm95234_read_temp(client, i, &data->temp[i]); | |
176 | if (ret < 0) | |
177 | goto abort; | |
178 | } | |
179 | ||
180 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_FAULT); | |
181 | if (ret < 0) | |
182 | goto abort; | |
183 | data->status = ret; | |
184 | ||
185 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_TCRIT1); | |
186 | if (ret < 0) | |
187 | goto abort; | |
188 | data->status |= ret << 8; | |
189 | ||
190 | ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_TCRIT2); | |
191 | if (ret < 0) | |
192 | goto abort; | |
193 | data->status |= ret << 16; | |
194 | ||
195 | data->last_updated = jiffies; | |
196 | data->valid = true; | |
197 | } | |
198 | ret = 0; | |
199 | abort: | |
200 | mutex_unlock(&data->update_lock); | |
201 | ||
202 | return ret; | |
203 | } | |
204 | ||
33721d90 | 205 | static ssize_t temp_show(struct device *dev, struct device_attribute *attr, |
e1eb4906 GR |
206 | char *buf) |
207 | { | |
9d86bd6b | 208 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 209 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 210 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
211 | |
212 | if (ret) | |
213 | return ret; | |
214 | ||
215 | return sprintf(buf, "%d\n", | |
216 | DIV_ROUND_CLOSEST(data->temp[index] * 125, 32)); | |
217 | } | |
218 | ||
33721d90 GR |
219 | static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, |
220 | char *buf) | |
e1eb4906 | 221 | { |
9d86bd6b | 222 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 223 | u32 mask = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 224 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
225 | |
226 | if (ret) | |
227 | return ret; | |
228 | ||
229 | return sprintf(buf, "%u", !!(data->status & mask)); | |
230 | } | |
231 | ||
33721d90 | 232 | static ssize_t type_show(struct device *dev, struct device_attribute *attr, |
e1eb4906 GR |
233 | char *buf) |
234 | { | |
9d86bd6b | 235 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 236 | u8 mask = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 237 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
238 | |
239 | if (ret) | |
240 | return ret; | |
241 | ||
242 | return sprintf(buf, data->sensor_type & mask ? "1\n" : "2\n"); | |
243 | } | |
244 | ||
33721d90 GR |
245 | static ssize_t type_store(struct device *dev, struct device_attribute *attr, |
246 | const char *buf, size_t count) | |
e1eb4906 | 247 | { |
9d86bd6b | 248 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 GR |
249 | unsigned long val; |
250 | u8 mask = to_sensor_dev_attr(attr)->index; | |
9d86bd6b | 251 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
252 | |
253 | if (ret) | |
254 | return ret; | |
255 | ||
256 | ret = kstrtoul(buf, 10, &val); | |
257 | if (ret < 0) | |
258 | return ret; | |
259 | ||
260 | if (val != 1 && val != 2) | |
261 | return -EINVAL; | |
262 | ||
263 | mutex_lock(&data->update_lock); | |
264 | if (val == 1) | |
265 | data->sensor_type |= mask; | |
266 | else | |
267 | data->sensor_type &= ~mask; | |
268 | data->valid = false; | |
9d86bd6b | 269 | i2c_smbus_write_byte_data(data->client, LM95234_REG_REM_MODEL, |
e1eb4906 GR |
270 | data->sensor_type); |
271 | mutex_unlock(&data->update_lock); | |
272 | ||
273 | return count; | |
274 | } | |
275 | ||
33721d90 | 276 | static ssize_t tcrit2_show(struct device *dev, struct device_attribute *attr, |
e1eb4906 GR |
277 | char *buf) |
278 | { | |
9d86bd6b | 279 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 280 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 281 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
282 | |
283 | if (ret) | |
284 | return ret; | |
285 | ||
286 | return sprintf(buf, "%u", data->tcrit2[index] * 1000); | |
287 | } | |
288 | ||
33721d90 GR |
289 | static ssize_t tcrit2_store(struct device *dev, struct device_attribute *attr, |
290 | const char *buf, size_t count) | |
e1eb4906 | 291 | { |
9d86bd6b | 292 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 GR |
293 | int index = to_sensor_dev_attr(attr)->index; |
294 | long val; | |
9d86bd6b | 295 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
296 | |
297 | if (ret) | |
298 | return ret; | |
299 | ||
300 | ret = kstrtol(buf, 10, &val); | |
301 | if (ret < 0) | |
302 | return ret; | |
303 | ||
304 | val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, index ? 255 : 127); | |
305 | ||
306 | mutex_lock(&data->update_lock); | |
307 | data->tcrit2[index] = val; | |
9d86bd6b | 308 | i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT2(index), val); |
e1eb4906 GR |
309 | mutex_unlock(&data->update_lock); |
310 | ||
311 | return count; | |
312 | } | |
313 | ||
33721d90 | 314 | static ssize_t tcrit2_hyst_show(struct device *dev, |
e1eb4906 GR |
315 | struct device_attribute *attr, char *buf) |
316 | { | |
9d86bd6b | 317 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 318 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 319 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
320 | |
321 | if (ret) | |
322 | return ret; | |
323 | ||
324 | /* Result can be negative, so be careful with unsigned operands */ | |
325 | return sprintf(buf, "%d", | |
326 | ((int)data->tcrit2[index] - (int)data->thyst) * 1000); | |
327 | } | |
328 | ||
33721d90 | 329 | static ssize_t tcrit1_show(struct device *dev, struct device_attribute *attr, |
e1eb4906 GR |
330 | char *buf) |
331 | { | |
9d86bd6b | 332 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 GR |
333 | int index = to_sensor_dev_attr(attr)->index; |
334 | ||
335 | return sprintf(buf, "%u", data->tcrit1[index] * 1000); | |
336 | } | |
337 | ||
33721d90 GR |
338 | static ssize_t tcrit1_store(struct device *dev, struct device_attribute *attr, |
339 | const char *buf, size_t count) | |
e1eb4906 | 340 | { |
9d86bd6b | 341 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 342 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 343 | int ret = lm95234_update_device(data); |
e1eb4906 | 344 | long val; |
e1eb4906 GR |
345 | |
346 | if (ret) | |
347 | return ret; | |
348 | ||
349 | ret = kstrtol(buf, 10, &val); | |
350 | if (ret < 0) | |
351 | return ret; | |
352 | ||
353 | val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, 255); | |
354 | ||
355 | mutex_lock(&data->update_lock); | |
356 | data->tcrit1[index] = val; | |
9d86bd6b | 357 | i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT1(index), val); |
e1eb4906 GR |
358 | mutex_unlock(&data->update_lock); |
359 | ||
360 | return count; | |
361 | } | |
362 | ||
33721d90 | 363 | static ssize_t tcrit1_hyst_show(struct device *dev, |
e1eb4906 GR |
364 | struct device_attribute *attr, char *buf) |
365 | { | |
9d86bd6b | 366 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 367 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 368 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
369 | |
370 | if (ret) | |
371 | return ret; | |
372 | ||
373 | /* Result can be negative, so be careful with unsigned operands */ | |
374 | return sprintf(buf, "%d", | |
375 | ((int)data->tcrit1[index] - (int)data->thyst) * 1000); | |
376 | } | |
377 | ||
33721d90 GR |
378 | static ssize_t tcrit1_hyst_store(struct device *dev, |
379 | struct device_attribute *attr, | |
380 | const char *buf, size_t count) | |
e1eb4906 | 381 | { |
9d86bd6b | 382 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 383 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 384 | int ret = lm95234_update_device(data); |
e1eb4906 | 385 | long val; |
e1eb4906 GR |
386 | |
387 | if (ret) | |
388 | return ret; | |
389 | ||
390 | ret = kstrtol(buf, 10, &val); | |
391 | if (ret < 0) | |
392 | return ret; | |
393 | ||
394 | val = DIV_ROUND_CLOSEST(val, 1000); | |
395 | val = clamp_val((int)data->tcrit1[index] - val, 0, 31); | |
396 | ||
397 | mutex_lock(&data->update_lock); | |
398 | data->thyst = val; | |
9d86bd6b | 399 | i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT_HYST, val); |
e1eb4906 GR |
400 | mutex_unlock(&data->update_lock); |
401 | ||
402 | return count; | |
403 | } | |
404 | ||
33721d90 | 405 | static ssize_t offset_show(struct device *dev, struct device_attribute *attr, |
e1eb4906 GR |
406 | char *buf) |
407 | { | |
9d86bd6b | 408 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 409 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 410 | int ret = lm95234_update_device(data); |
e1eb4906 GR |
411 | |
412 | if (ret) | |
413 | return ret; | |
414 | ||
415 | return sprintf(buf, "%d", data->toffset[index] * 500); | |
416 | } | |
417 | ||
33721d90 GR |
418 | static ssize_t offset_store(struct device *dev, struct device_attribute *attr, |
419 | const char *buf, size_t count) | |
e1eb4906 | 420 | { |
9d86bd6b | 421 | struct lm95234_data *data = dev_get_drvdata(dev); |
e1eb4906 | 422 | int index = to_sensor_dev_attr(attr)->index; |
9d86bd6b | 423 | int ret = lm95234_update_device(data); |
e1eb4906 | 424 | long val; |
e1eb4906 GR |
425 | |
426 | if (ret) | |
427 | return ret; | |
428 | ||
429 | ret = kstrtol(buf, 10, &val); | |
430 | if (ret < 0) | |
431 | return ret; | |
432 | ||
433 | /* Accuracy is 1/2 degrees C */ | |
434 | val = clamp_val(DIV_ROUND_CLOSEST(val, 500), -128, 127); | |
435 | ||
436 | mutex_lock(&data->update_lock); | |
437 | data->toffset[index] = val; | |
9d86bd6b | 438 | i2c_smbus_write_byte_data(data->client, LM95234_REG_OFFSET(index), val); |
e1eb4906 GR |
439 | mutex_unlock(&data->update_lock); |
440 | ||
441 | return count; | |
442 | } | |
443 | ||
2f2dbea6 JL |
444 | static ssize_t update_interval_show(struct device *dev, |
445 | struct device_attribute *attr, char *buf) | |
e1eb4906 | 446 | { |
9d86bd6b GR |
447 | struct lm95234_data *data = dev_get_drvdata(dev); |
448 | int ret = lm95234_update_device(data); | |
e1eb4906 GR |
449 | |
450 | if (ret) | |
451 | return ret; | |
452 | ||
453 | return sprintf(buf, "%lu\n", | |
454 | DIV_ROUND_CLOSEST(data->interval * 1000, HZ)); | |
455 | } | |
456 | ||
2f2dbea6 JL |
457 | static ssize_t update_interval_store(struct device *dev, |
458 | struct device_attribute *attr, | |
459 | const char *buf, size_t count) | |
e1eb4906 | 460 | { |
9d86bd6b GR |
461 | struct lm95234_data *data = dev_get_drvdata(dev); |
462 | int ret = lm95234_update_device(data); | |
e1eb4906 GR |
463 | unsigned long val; |
464 | u8 regval; | |
e1eb4906 GR |
465 | |
466 | if (ret) | |
467 | return ret; | |
468 | ||
469 | ret = kstrtoul(buf, 10, &val); | |
470 | if (ret < 0) | |
471 | return ret; | |
472 | ||
473 | for (regval = 0; regval < 3; regval++) { | |
474 | if (val <= update_intervals[regval]) | |
475 | break; | |
476 | } | |
477 | ||
478 | mutex_lock(&data->update_lock); | |
479 | data->interval = msecs_to_jiffies(update_intervals[regval]); | |
9d86bd6b | 480 | i2c_smbus_write_byte_data(data->client, LM95234_REG_CONVRATE, regval); |
e1eb4906 GR |
481 | mutex_unlock(&data->update_lock); |
482 | ||
483 | return count; | |
484 | } | |
485 | ||
33721d90 GR |
486 | static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); |
487 | static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); | |
488 | static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); | |
489 | static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3); | |
490 | static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4); | |
491 | ||
492 | static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, BIT(0) | BIT(1)); | |
493 | static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, BIT(2) | BIT(3)); | |
494 | static SENSOR_DEVICE_ATTR_RO(temp4_fault, alarm, BIT(4) | BIT(5)); | |
495 | static SENSOR_DEVICE_ATTR_RO(temp5_fault, alarm, BIT(6) | BIT(7)); | |
496 | ||
497 | static SENSOR_DEVICE_ATTR_RW(temp2_type, type, BIT(1)); | |
498 | static SENSOR_DEVICE_ATTR_RW(temp3_type, type, BIT(2)); | |
499 | static SENSOR_DEVICE_ATTR_RW(temp4_type, type, BIT(3)); | |
500 | static SENSOR_DEVICE_ATTR_RW(temp5_type, type, BIT(4)); | |
501 | ||
502 | static SENSOR_DEVICE_ATTR_RW(temp1_max, tcrit1, 0); | |
503 | static SENSOR_DEVICE_ATTR_RW(temp2_max, tcrit2, 0); | |
504 | static SENSOR_DEVICE_ATTR_RW(temp3_max, tcrit2, 1); | |
505 | static SENSOR_DEVICE_ATTR_RW(temp4_max, tcrit1, 3); | |
506 | static SENSOR_DEVICE_ATTR_RW(temp5_max, tcrit1, 4); | |
507 | ||
508 | static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, tcrit1_hyst, 0); | |
509 | static SENSOR_DEVICE_ATTR_RO(temp2_max_hyst, tcrit2_hyst, 0); | |
510 | static SENSOR_DEVICE_ATTR_RO(temp3_max_hyst, tcrit2_hyst, 1); | |
511 | static SENSOR_DEVICE_ATTR_RO(temp4_max_hyst, tcrit1_hyst, 3); | |
512 | static SENSOR_DEVICE_ATTR_RO(temp5_max_hyst, tcrit1_hyst, 4); | |
513 | ||
514 | static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, BIT(0 + 8)); | |
515 | static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, BIT(1 + 16)); | |
516 | static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, alarm, BIT(2 + 16)); | |
517 | static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, alarm, BIT(3 + 8)); | |
518 | static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, alarm, BIT(4 + 8)); | |
519 | ||
520 | static SENSOR_DEVICE_ATTR_RW(temp2_crit, tcrit1, 1); | |
521 | static SENSOR_DEVICE_ATTR_RW(temp3_crit, tcrit1, 2); | |
522 | ||
523 | static SENSOR_DEVICE_ATTR_RO(temp2_crit_hyst, tcrit1_hyst, 1); | |
524 | static SENSOR_DEVICE_ATTR_RO(temp3_crit_hyst, tcrit1_hyst, 2); | |
525 | ||
526 | static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, BIT(1 + 8)); | |
527 | static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, alarm, BIT(2 + 8)); | |
528 | ||
529 | static SENSOR_DEVICE_ATTR_RW(temp2_offset, offset, 0); | |
530 | static SENSOR_DEVICE_ATTR_RW(temp3_offset, offset, 1); | |
531 | static SENSOR_DEVICE_ATTR_RW(temp4_offset, offset, 2); | |
532 | static SENSOR_DEVICE_ATTR_RW(temp5_offset, offset, 3); | |
e1eb4906 | 533 | |
2f2dbea6 | 534 | static DEVICE_ATTR_RW(update_interval); |
e1eb4906 | 535 | |
dfcd4c53 | 536 | static struct attribute *lm95234_common_attrs[] = { |
e1eb4906 GR |
537 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
538 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
539 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
e1eb4906 GR |
540 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
541 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
e1eb4906 GR |
542 | &sensor_dev_attr_temp2_type.dev_attr.attr, |
543 | &sensor_dev_attr_temp3_type.dev_attr.attr, | |
e1eb4906 GR |
544 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
545 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
546 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
e1eb4906 GR |
547 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, |
548 | &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, | |
549 | &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, | |
e1eb4906 GR |
550 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, |
551 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
552 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, | |
e1eb4906 GR |
553 | &sensor_dev_attr_temp2_crit.dev_attr.attr, |
554 | &sensor_dev_attr_temp3_crit.dev_attr.attr, | |
555 | &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, | |
556 | &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, | |
557 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
558 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, | |
559 | &sensor_dev_attr_temp2_offset.dev_attr.attr, | |
560 | &sensor_dev_attr_temp3_offset.dev_attr.attr, | |
dfcd4c53 GR |
561 | &dev_attr_update_interval.attr, |
562 | NULL | |
563 | }; | |
564 | ||
565 | static const struct attribute_group lm95234_common_group = { | |
566 | .attrs = lm95234_common_attrs, | |
567 | }; | |
568 | ||
569 | static struct attribute *lm95234_attrs[] = { | |
570 | &sensor_dev_attr_temp4_input.dev_attr.attr, | |
571 | &sensor_dev_attr_temp5_input.dev_attr.attr, | |
572 | &sensor_dev_attr_temp4_fault.dev_attr.attr, | |
573 | &sensor_dev_attr_temp5_fault.dev_attr.attr, | |
574 | &sensor_dev_attr_temp4_type.dev_attr.attr, | |
575 | &sensor_dev_attr_temp5_type.dev_attr.attr, | |
576 | &sensor_dev_attr_temp4_max.dev_attr.attr, | |
577 | &sensor_dev_attr_temp5_max.dev_attr.attr, | |
578 | &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, | |
579 | &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, | |
580 | &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, | |
581 | &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, | |
e1eb4906 GR |
582 | &sensor_dev_attr_temp4_offset.dev_attr.attr, |
583 | &sensor_dev_attr_temp5_offset.dev_attr.attr, | |
e1eb4906 GR |
584 | NULL |
585 | }; | |
dfcd4c53 GR |
586 | |
587 | static const struct attribute_group lm95234_group = { | |
588 | .attrs = lm95234_attrs, | |
589 | }; | |
e1eb4906 GR |
590 | |
591 | static int lm95234_detect(struct i2c_client *client, | |
592 | struct i2c_board_info *info) | |
593 | { | |
594 | struct i2c_adapter *adapter = client->adapter; | |
dfcd4c53 GR |
595 | int address = client->addr; |
596 | u8 config_mask, model_mask; | |
e1eb4906 | 597 | int mfg_id, chip_id, val; |
dfcd4c53 | 598 | const char *name; |
e1eb4906 GR |
599 | |
600 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
601 | return -ENODEV; | |
602 | ||
603 | mfg_id = i2c_smbus_read_byte_data(client, LM95234_REG_MAN_ID); | |
604 | if (mfg_id != NATSEMI_MAN_ID) | |
605 | return -ENODEV; | |
606 | ||
607 | chip_id = i2c_smbus_read_byte_data(client, LM95234_REG_CHIP_ID); | |
dfcd4c53 GR |
608 | switch (chip_id) { |
609 | case LM95233_CHIP_ID: | |
610 | if (address != 0x18 && address != 0x2a && address != 0x2b) | |
611 | return -ENODEV; | |
612 | config_mask = 0xbf; | |
613 | model_mask = 0xf9; | |
614 | name = "lm95233"; | |
615 | break; | |
616 | case LM95234_CHIP_ID: | |
617 | if (address != 0x18 && address != 0x4d && address != 0x4e) | |
618 | return -ENODEV; | |
619 | config_mask = 0xbc; | |
620 | model_mask = 0xe1; | |
621 | name = "lm95234"; | |
622 | break; | |
623 | default: | |
e1eb4906 | 624 | return -ENODEV; |
dfcd4c53 | 625 | } |
e1eb4906 GR |
626 | |
627 | val = i2c_smbus_read_byte_data(client, LM95234_REG_STATUS); | |
628 | if (val & 0x30) | |
629 | return -ENODEV; | |
630 | ||
631 | val = i2c_smbus_read_byte_data(client, LM95234_REG_CONFIG); | |
dfcd4c53 | 632 | if (val & config_mask) |
e1eb4906 GR |
633 | return -ENODEV; |
634 | ||
635 | val = i2c_smbus_read_byte_data(client, LM95234_REG_CONVRATE); | |
636 | if (val & 0xfc) | |
637 | return -ENODEV; | |
638 | ||
639 | val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); | |
dfcd4c53 | 640 | if (val & model_mask) |
e1eb4906 GR |
641 | return -ENODEV; |
642 | ||
643 | val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL_STS); | |
dfcd4c53 | 644 | if (val & model_mask) |
e1eb4906 GR |
645 | return -ENODEV; |
646 | ||
dfcd4c53 | 647 | strlcpy(info->type, name, I2C_NAME_SIZE); |
e1eb4906 GR |
648 | return 0; |
649 | } | |
650 | ||
651 | static int lm95234_init_client(struct i2c_client *client) | |
652 | { | |
653 | int val, model; | |
654 | ||
655 | /* start conversion if necessary */ | |
656 | val = i2c_smbus_read_byte_data(client, LM95234_REG_CONFIG); | |
657 | if (val < 0) | |
658 | return val; | |
659 | if (val & 0x40) | |
660 | i2c_smbus_write_byte_data(client, LM95234_REG_CONFIG, | |
661 | val & ~0x40); | |
662 | ||
663 | /* If diode type status reports an error, try to fix it */ | |
664 | val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL_STS); | |
665 | if (val < 0) | |
666 | return val; | |
667 | model = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); | |
668 | if (model < 0) | |
669 | return model; | |
670 | if (model & val) { | |
671 | dev_notice(&client->dev, | |
672 | "Fixing remote diode type misconfiguration (0x%x)\n", | |
673 | val); | |
674 | i2c_smbus_write_byte_data(client, LM95234_REG_REM_MODEL, | |
675 | model & ~val); | |
676 | } | |
677 | return 0; | |
678 | } | |
679 | ||
67487038 SK |
680 | static const struct i2c_device_id lm95234_id[]; |
681 | ||
682 | static int lm95234_probe(struct i2c_client *client) | |
e1eb4906 GR |
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 | ||
dfcd4c53 | 701 | data->groups[0] = &lm95234_common_group; |
67487038 | 702 | if (i2c_match_id(lm95234_id, client)->driver_data == lm95234) |
dfcd4c53 GR |
703 | data->groups[1] = &lm95234_group; |
704 | ||
9d86bd6b | 705 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
dfcd4c53 | 706 | data, data->groups); |
3ea85ba7 | 707 | return PTR_ERR_OR_ZERO(hwmon_dev); |
e1eb4906 GR |
708 | } |
709 | ||
710 | /* Driver data (common to all clients) */ | |
711 | static const struct i2c_device_id lm95234_id[] = { | |
dfcd4c53 GR |
712 | { "lm95233", lm95233 }, |
713 | { "lm95234", lm95234 }, | |
e1eb4906 GR |
714 | { } |
715 | }; | |
716 | MODULE_DEVICE_TABLE(i2c, lm95234_id); | |
717 | ||
718 | static struct i2c_driver lm95234_driver = { | |
719 | .class = I2C_CLASS_HWMON, | |
720 | .driver = { | |
721 | .name = DRVNAME, | |
722 | }, | |
67487038 | 723 | .probe_new = lm95234_probe, |
e1eb4906 GR |
724 | .id_table = lm95234_id, |
725 | .detect = lm95234_detect, | |
726 | .address_list = normal_i2c, | |
727 | }; | |
728 | ||
729 | module_i2c_driver(lm95234_driver); | |
730 | ||
731 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); | |
dfcd4c53 | 732 | MODULE_DESCRIPTION("LM95233/LM95234 sensor driver"); |
e1eb4906 | 733 | MODULE_LICENSE("GPL"); |