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ab2b79d5 HG |
1 | /* tmp401.c |
2 | * | |
3 | * Copyright (C) 2007,2008 Hans de Goede <hdegoede@redhat.com> | |
fce0758f AP |
4 | * Preliminary tmp411 support by: |
5 | * Gabriel Konat, Sander Leget, Wouter Willems | |
6 | * Copyright (C) 2009 Andre Prendel <andre.prendel@gmx.de> | |
ab2b79d5 HG |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | */ | |
22 | ||
23 | /* | |
24 | * Driver for the Texas Instruments TMP401 SMBUS temperature sensor IC. | |
25 | * | |
26 | * Note this IC is in some aspect similar to the LM90, but it has quite a | |
27 | * few differences too, for example the local temp has a higher resolution | |
28 | * and thus has 16 bits registers for its value and limit instead of 8 bits. | |
29 | */ | |
30 | ||
31 | #include <linux/module.h> | |
32 | #include <linux/init.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/jiffies.h> | |
35 | #include <linux/i2c.h> | |
36 | #include <linux/hwmon.h> | |
37 | #include <linux/hwmon-sysfs.h> | |
38 | #include <linux/err.h> | |
39 | #include <linux/mutex.h> | |
40 | #include <linux/sysfs.h> | |
41 | ||
42 | /* Addresses to scan */ | |
a1fac92b | 43 | static const unsigned short normal_i2c[] = { 0x4c, 0x4d, 0x4e, I2C_CLIENT_END }; |
ab2b79d5 | 44 | |
a1fac92b | 45 | enum chips { tmp401, tmp411, tmp431 }; |
ab2b79d5 HG |
46 | |
47 | /* | |
48 | * The TMP401 registers, note some registers have different addresses for | |
49 | * reading and writing | |
50 | */ | |
51 | #define TMP401_STATUS 0x02 | |
52 | #define TMP401_CONFIG_READ 0x03 | |
53 | #define TMP401_CONFIG_WRITE 0x09 | |
54 | #define TMP401_CONVERSION_RATE_READ 0x04 | |
55 | #define TMP401_CONVERSION_RATE_WRITE 0x0A | |
56 | #define TMP401_TEMP_CRIT_HYST 0x21 | |
57 | #define TMP401_CONSECUTIVE_ALERT 0x22 | |
58 | #define TMP401_MANUFACTURER_ID_REG 0xFE | |
59 | #define TMP401_DEVICE_ID_REG 0xFF | |
fce0758f | 60 | #define TMP411_N_FACTOR_REG 0x18 |
ab2b79d5 HG |
61 | |
62 | static const u8 TMP401_TEMP_MSB[2] = { 0x00, 0x01 }; | |
63 | static const u8 TMP401_TEMP_LSB[2] = { 0x15, 0x10 }; | |
64 | static const u8 TMP401_TEMP_LOW_LIMIT_MSB_READ[2] = { 0x06, 0x08 }; | |
65 | static const u8 TMP401_TEMP_LOW_LIMIT_MSB_WRITE[2] = { 0x0C, 0x0E }; | |
66 | static const u8 TMP401_TEMP_LOW_LIMIT_LSB[2] = { 0x17, 0x14 }; | |
67 | static const u8 TMP401_TEMP_HIGH_LIMIT_MSB_READ[2] = { 0x05, 0x07 }; | |
68 | static const u8 TMP401_TEMP_HIGH_LIMIT_MSB_WRITE[2] = { 0x0B, 0x0D }; | |
69 | static const u8 TMP401_TEMP_HIGH_LIMIT_LSB[2] = { 0x16, 0x13 }; | |
70 | /* These are called the THERM limit / hysteresis / mask in the datasheet */ | |
71 | static const u8 TMP401_TEMP_CRIT_LIMIT[2] = { 0x20, 0x19 }; | |
72 | ||
fce0758f AP |
73 | static const u8 TMP411_TEMP_LOWEST_MSB[2] = { 0x30, 0x34 }; |
74 | static const u8 TMP411_TEMP_LOWEST_LSB[2] = { 0x31, 0x35 }; | |
75 | static const u8 TMP411_TEMP_HIGHEST_MSB[2] = { 0x32, 0x36 }; | |
76 | static const u8 TMP411_TEMP_HIGHEST_LSB[2] = { 0x33, 0x37 }; | |
77 | ||
ab2b79d5 HG |
78 | /* Flags */ |
79 | #define TMP401_CONFIG_RANGE 0x04 | |
80 | #define TMP401_CONFIG_SHUTDOWN 0x40 | |
81 | #define TMP401_STATUS_LOCAL_CRIT 0x01 | |
82 | #define TMP401_STATUS_REMOTE_CRIT 0x02 | |
83 | #define TMP401_STATUS_REMOTE_OPEN 0x04 | |
84 | #define TMP401_STATUS_REMOTE_LOW 0x08 | |
85 | #define TMP401_STATUS_REMOTE_HIGH 0x10 | |
86 | #define TMP401_STATUS_LOCAL_LOW 0x20 | |
87 | #define TMP401_STATUS_LOCAL_HIGH 0x40 | |
88 | ||
89 | /* Manufacturer / Device ID's */ | |
90 | #define TMP401_MANUFACTURER_ID 0x55 | |
91 | #define TMP401_DEVICE_ID 0x11 | |
4ce5b1fe GR |
92 | #define TMP411A_DEVICE_ID 0x12 |
93 | #define TMP411B_DEVICE_ID 0x13 | |
94 | #define TMP411C_DEVICE_ID 0x10 | |
a1fac92b | 95 | #define TMP431_DEVICE_ID 0x31 |
ab2b79d5 | 96 | |
ab2b79d5 HG |
97 | /* |
98 | * Driver data (common to all clients) | |
99 | */ | |
100 | ||
101 | static const struct i2c_device_id tmp401_id[] = { | |
102 | { "tmp401", tmp401 }, | |
fce0758f | 103 | { "tmp411", tmp411 }, |
a1fac92b | 104 | { "tmp431", tmp431 }, |
ab2b79d5 HG |
105 | { } |
106 | }; | |
107 | MODULE_DEVICE_TABLE(i2c, tmp401_id); | |
108 | ||
ab2b79d5 HG |
109 | /* |
110 | * Client data (each client gets its own) | |
111 | */ | |
112 | ||
113 | struct tmp401_data { | |
114 | struct device *hwmon_dev; | |
115 | struct mutex update_lock; | |
116 | char valid; /* zero until following fields are valid */ | |
117 | unsigned long last_updated; /* in jiffies */ | |
dc71afe5 | 118 | enum chips kind; |
ab2b79d5 HG |
119 | |
120 | /* register values */ | |
121 | u8 status; | |
122 | u8 config; | |
123 | u16 temp[2]; | |
124 | u16 temp_low[2]; | |
125 | u16 temp_high[2]; | |
126 | u8 temp_crit[2]; | |
127 | u8 temp_crit_hyst; | |
fce0758f AP |
128 | u16 temp_lowest[2]; |
129 | u16 temp_highest[2]; | |
ab2b79d5 HG |
130 | }; |
131 | ||
132 | /* | |
133 | * Sysfs attr show / store functions | |
134 | */ | |
135 | ||
136 | static int tmp401_register_to_temp(u16 reg, u8 config) | |
137 | { | |
138 | int temp = reg; | |
139 | ||
140 | if (config & TMP401_CONFIG_RANGE) | |
141 | temp -= 64 * 256; | |
142 | ||
143 | return (temp * 625 + 80) / 160; | |
144 | } | |
145 | ||
146 | static u16 tmp401_temp_to_register(long temp, u8 config) | |
147 | { | |
148 | if (config & TMP401_CONFIG_RANGE) { | |
2a844c14 | 149 | temp = clamp_val(temp, -64000, 191000); |
ab2b79d5 HG |
150 | temp += 64000; |
151 | } else | |
2a844c14 | 152 | temp = clamp_val(temp, 0, 127000); |
ab2b79d5 HG |
153 | |
154 | return (temp * 160 + 312) / 625; | |
155 | } | |
156 | ||
157 | static int tmp401_crit_register_to_temp(u8 reg, u8 config) | |
158 | { | |
159 | int temp = reg; | |
160 | ||
161 | if (config & TMP401_CONFIG_RANGE) | |
162 | temp -= 64; | |
163 | ||
164 | return temp * 1000; | |
165 | } | |
166 | ||
167 | static u8 tmp401_crit_temp_to_register(long temp, u8 config) | |
168 | { | |
169 | if (config & TMP401_CONFIG_RANGE) { | |
2a844c14 | 170 | temp = clamp_val(temp, -64000, 191000); |
ab2b79d5 HG |
171 | temp += 64000; |
172 | } else | |
2a844c14 | 173 | temp = clamp_val(temp, 0, 127000); |
ab2b79d5 HG |
174 | |
175 | return (temp + 500) / 1000; | |
176 | } | |
177 | ||
ea63c2b9 AP |
178 | static struct tmp401_data *tmp401_update_device_reg16( |
179 | struct i2c_client *client, struct tmp401_data *data) | |
180 | { | |
181 | int i; | |
182 | ||
183 | for (i = 0; i < 2; i++) { | |
184 | /* | |
185 | * High byte must be read first immediately followed | |
186 | * by the low byte | |
187 | */ | |
188 | data->temp[i] = i2c_smbus_read_byte_data(client, | |
189 | TMP401_TEMP_MSB[i]) << 8; | |
190 | data->temp[i] |= i2c_smbus_read_byte_data(client, | |
191 | TMP401_TEMP_LSB[i]); | |
192 | data->temp_low[i] = i2c_smbus_read_byte_data(client, | |
193 | TMP401_TEMP_LOW_LIMIT_MSB_READ[i]) << 8; | |
194 | data->temp_low[i] |= i2c_smbus_read_byte_data(client, | |
195 | TMP401_TEMP_LOW_LIMIT_LSB[i]); | |
196 | data->temp_high[i] = i2c_smbus_read_byte_data(client, | |
197 | TMP401_TEMP_HIGH_LIMIT_MSB_READ[i]) << 8; | |
198 | data->temp_high[i] |= i2c_smbus_read_byte_data(client, | |
199 | TMP401_TEMP_HIGH_LIMIT_LSB[i]); | |
200 | data->temp_crit[i] = i2c_smbus_read_byte_data(client, | |
201 | TMP401_TEMP_CRIT_LIMIT[i]); | |
202 | ||
203 | if (data->kind == tmp411) { | |
204 | data->temp_lowest[i] = i2c_smbus_read_byte_data(client, | |
205 | TMP411_TEMP_LOWEST_MSB[i]) << 8; | |
206 | data->temp_lowest[i] |= i2c_smbus_read_byte_data( | |
207 | client, TMP411_TEMP_LOWEST_LSB[i]); | |
208 | ||
209 | data->temp_highest[i] = i2c_smbus_read_byte_data( | |
210 | client, TMP411_TEMP_HIGHEST_MSB[i]) << 8; | |
211 | data->temp_highest[i] |= i2c_smbus_read_byte_data( | |
212 | client, TMP411_TEMP_HIGHEST_LSB[i]); | |
213 | } | |
214 | } | |
215 | return data; | |
216 | } | |
217 | ||
218 | static struct tmp401_data *tmp401_update_device(struct device *dev) | |
219 | { | |
220 | struct i2c_client *client = to_i2c_client(dev); | |
221 | struct tmp401_data *data = i2c_get_clientdata(client); | |
222 | ||
223 | mutex_lock(&data->update_lock); | |
224 | ||
225 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
226 | data->status = i2c_smbus_read_byte_data(client, TMP401_STATUS); | |
227 | data->config = i2c_smbus_read_byte_data(client, | |
228 | TMP401_CONFIG_READ); | |
229 | tmp401_update_device_reg16(client, data); | |
230 | ||
231 | data->temp_crit_hyst = i2c_smbus_read_byte_data(client, | |
232 | TMP401_TEMP_CRIT_HYST); | |
233 | ||
234 | data->last_updated = jiffies; | |
235 | data->valid = 1; | |
236 | } | |
237 | ||
238 | mutex_unlock(&data->update_lock); | |
239 | ||
240 | return data; | |
241 | } | |
242 | ||
ab2b79d5 HG |
243 | static ssize_t show_temp_value(struct device *dev, |
244 | struct device_attribute *devattr, char *buf) | |
245 | { | |
246 | int index = to_sensor_dev_attr(devattr)->index; | |
247 | struct tmp401_data *data = tmp401_update_device(dev); | |
248 | ||
249 | return sprintf(buf, "%d\n", | |
250 | tmp401_register_to_temp(data->temp[index], data->config)); | |
251 | } | |
252 | ||
253 | static ssize_t show_temp_min(struct device *dev, | |
254 | struct device_attribute *devattr, char *buf) | |
255 | { | |
256 | int index = to_sensor_dev_attr(devattr)->index; | |
257 | struct tmp401_data *data = tmp401_update_device(dev); | |
258 | ||
259 | return sprintf(buf, "%d\n", | |
260 | tmp401_register_to_temp(data->temp_low[index], data->config)); | |
261 | } | |
262 | ||
263 | static ssize_t show_temp_max(struct device *dev, | |
264 | struct device_attribute *devattr, char *buf) | |
265 | { | |
266 | int index = to_sensor_dev_attr(devattr)->index; | |
267 | struct tmp401_data *data = tmp401_update_device(dev); | |
268 | ||
269 | return sprintf(buf, "%d\n", | |
270 | tmp401_register_to_temp(data->temp_high[index], data->config)); | |
271 | } | |
272 | ||
273 | static ssize_t show_temp_crit(struct device *dev, | |
274 | struct device_attribute *devattr, char *buf) | |
275 | { | |
276 | int index = to_sensor_dev_attr(devattr)->index; | |
277 | struct tmp401_data *data = tmp401_update_device(dev); | |
278 | ||
279 | return sprintf(buf, "%d\n", | |
280 | tmp401_crit_register_to_temp(data->temp_crit[index], | |
281 | data->config)); | |
282 | } | |
283 | ||
284 | static ssize_t show_temp_crit_hyst(struct device *dev, | |
285 | struct device_attribute *devattr, char *buf) | |
286 | { | |
287 | int temp, index = to_sensor_dev_attr(devattr)->index; | |
288 | struct tmp401_data *data = tmp401_update_device(dev); | |
289 | ||
290 | mutex_lock(&data->update_lock); | |
291 | temp = tmp401_crit_register_to_temp(data->temp_crit[index], | |
292 | data->config); | |
293 | temp -= data->temp_crit_hyst * 1000; | |
294 | mutex_unlock(&data->update_lock); | |
295 | ||
296 | return sprintf(buf, "%d\n", temp); | |
297 | } | |
298 | ||
fce0758f AP |
299 | static ssize_t show_temp_lowest(struct device *dev, |
300 | struct device_attribute *devattr, char *buf) | |
301 | { | |
302 | int index = to_sensor_dev_attr(devattr)->index; | |
303 | struct tmp401_data *data = tmp401_update_device(dev); | |
304 | ||
305 | return sprintf(buf, "%d\n", | |
306 | tmp401_register_to_temp(data->temp_lowest[index], | |
307 | data->config)); | |
308 | } | |
309 | ||
310 | static ssize_t show_temp_highest(struct device *dev, | |
311 | struct device_attribute *devattr, char *buf) | |
312 | { | |
313 | int index = to_sensor_dev_attr(devattr)->index; | |
314 | struct tmp401_data *data = tmp401_update_device(dev); | |
315 | ||
316 | return sprintf(buf, "%d\n", | |
317 | tmp401_register_to_temp(data->temp_highest[index], | |
318 | data->config)); | |
319 | } | |
320 | ||
ab2b79d5 HG |
321 | static ssize_t show_status(struct device *dev, |
322 | struct device_attribute *devattr, char *buf) | |
323 | { | |
324 | int mask = to_sensor_dev_attr(devattr)->index; | |
325 | struct tmp401_data *data = tmp401_update_device(dev); | |
326 | ||
327 | if (data->status & mask) | |
328 | return sprintf(buf, "1\n"); | |
329 | else | |
330 | return sprintf(buf, "0\n"); | |
331 | } | |
332 | ||
333 | static ssize_t store_temp_min(struct device *dev, struct device_attribute | |
334 | *devattr, const char *buf, size_t count) | |
335 | { | |
336 | int index = to_sensor_dev_attr(devattr)->index; | |
337 | struct tmp401_data *data = tmp401_update_device(dev); | |
338 | long val; | |
339 | u16 reg; | |
340 | ||
179c4fdb | 341 | if (kstrtol(buf, 10, &val)) |
ab2b79d5 HG |
342 | return -EINVAL; |
343 | ||
344 | reg = tmp401_temp_to_register(val, data->config); | |
345 | ||
346 | mutex_lock(&data->update_lock); | |
347 | ||
348 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
349 | TMP401_TEMP_LOW_LIMIT_MSB_WRITE[index], reg >> 8); | |
350 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
351 | TMP401_TEMP_LOW_LIMIT_LSB[index], reg & 0xFF); | |
352 | ||
353 | data->temp_low[index] = reg; | |
354 | ||
355 | mutex_unlock(&data->update_lock); | |
356 | ||
357 | return count; | |
358 | } | |
359 | ||
360 | static ssize_t store_temp_max(struct device *dev, struct device_attribute | |
361 | *devattr, const char *buf, size_t count) | |
362 | { | |
363 | int index = to_sensor_dev_attr(devattr)->index; | |
364 | struct tmp401_data *data = tmp401_update_device(dev); | |
365 | long val; | |
366 | u16 reg; | |
367 | ||
179c4fdb | 368 | if (kstrtol(buf, 10, &val)) |
ab2b79d5 HG |
369 | return -EINVAL; |
370 | ||
371 | reg = tmp401_temp_to_register(val, data->config); | |
372 | ||
373 | mutex_lock(&data->update_lock); | |
374 | ||
375 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
376 | TMP401_TEMP_HIGH_LIMIT_MSB_WRITE[index], reg >> 8); | |
377 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
378 | TMP401_TEMP_HIGH_LIMIT_LSB[index], reg & 0xFF); | |
379 | ||
380 | data->temp_high[index] = reg; | |
381 | ||
382 | mutex_unlock(&data->update_lock); | |
383 | ||
384 | return count; | |
385 | } | |
386 | ||
387 | static ssize_t store_temp_crit(struct device *dev, struct device_attribute | |
388 | *devattr, const char *buf, size_t count) | |
389 | { | |
390 | int index = to_sensor_dev_attr(devattr)->index; | |
391 | struct tmp401_data *data = tmp401_update_device(dev); | |
392 | long val; | |
393 | u8 reg; | |
394 | ||
179c4fdb | 395 | if (kstrtol(buf, 10, &val)) |
ab2b79d5 HG |
396 | return -EINVAL; |
397 | ||
398 | reg = tmp401_crit_temp_to_register(val, data->config); | |
399 | ||
400 | mutex_lock(&data->update_lock); | |
401 | ||
402 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
403 | TMP401_TEMP_CRIT_LIMIT[index], reg); | |
404 | ||
405 | data->temp_crit[index] = reg; | |
406 | ||
407 | mutex_unlock(&data->update_lock); | |
408 | ||
409 | return count; | |
410 | } | |
411 | ||
412 | static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute | |
413 | *devattr, const char *buf, size_t count) | |
414 | { | |
415 | int temp, index = to_sensor_dev_attr(devattr)->index; | |
416 | struct tmp401_data *data = tmp401_update_device(dev); | |
417 | long val; | |
418 | u8 reg; | |
419 | ||
179c4fdb | 420 | if (kstrtol(buf, 10, &val)) |
ab2b79d5 HG |
421 | return -EINVAL; |
422 | ||
423 | if (data->config & TMP401_CONFIG_RANGE) | |
2a844c14 | 424 | val = clamp_val(val, -64000, 191000); |
ab2b79d5 | 425 | else |
2a844c14 | 426 | val = clamp_val(val, 0, 127000); |
ab2b79d5 HG |
427 | |
428 | mutex_lock(&data->update_lock); | |
429 | temp = tmp401_crit_register_to_temp(data->temp_crit[index], | |
430 | data->config); | |
2a844c14 | 431 | val = clamp_val(val, temp - 255000, temp); |
ab2b79d5 HG |
432 | reg = ((temp - val) + 500) / 1000; |
433 | ||
434 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
435 | TMP401_TEMP_CRIT_HYST, reg); | |
436 | ||
437 | data->temp_crit_hyst = reg; | |
438 | ||
439 | mutex_unlock(&data->update_lock); | |
440 | ||
441 | return count; | |
442 | } | |
443 | ||
fce0758f AP |
444 | /* |
445 | * Resets the historical measurements of minimum and maximum temperatures. | |
446 | * This is done by writing any value to any of the minimum/maximum registers | |
447 | * (0x30-0x37). | |
448 | */ | |
449 | static ssize_t reset_temp_history(struct device *dev, | |
450 | struct device_attribute *devattr, const char *buf, size_t count) | |
451 | { | |
452 | long val; | |
453 | ||
179c4fdb | 454 | if (kstrtol(buf, 10, &val)) |
fce0758f AP |
455 | return -EINVAL; |
456 | ||
457 | if (val != 1) { | |
b55f3757 GR |
458 | dev_err(dev, |
459 | "temp_reset_history value %ld not supported. Use 1 to reset the history!\n", | |
460 | val); | |
fce0758f AP |
461 | return -EINVAL; |
462 | } | |
463 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
464 | TMP411_TEMP_LOWEST_MSB[0], val); | |
465 | ||
466 | return count; | |
467 | } | |
468 | ||
ab2b79d5 | 469 | static struct sensor_device_attribute tmp401_attr[] = { |
2b76d80a AP |
470 | SENSOR_ATTR(temp1_input, S_IRUGO, show_temp_value, NULL, 0), |
471 | SENSOR_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min, | |
472 | store_temp_min, 0), | |
473 | SENSOR_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, | |
474 | store_temp_max, 0), | |
475 | SENSOR_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_crit, | |
476 | store_temp_crit, 0), | |
477 | SENSOR_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_crit_hyst, | |
ab2b79d5 | 478 | store_temp_crit_hyst, 0), |
2b76d80a | 479 | SENSOR_ATTR(temp1_min_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 | 480 | TMP401_STATUS_LOCAL_LOW), |
2b76d80a | 481 | SENSOR_ATTR(temp1_max_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 | 482 | TMP401_STATUS_LOCAL_HIGH), |
2b76d80a | 483 | SENSOR_ATTR(temp1_crit_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 | 484 | TMP401_STATUS_LOCAL_CRIT), |
2b76d80a AP |
485 | SENSOR_ATTR(temp2_input, S_IRUGO, show_temp_value, NULL, 1), |
486 | SENSOR_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min, | |
487 | store_temp_min, 1), | |
488 | SENSOR_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max, | |
489 | store_temp_max, 1), | |
490 | SENSOR_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp_crit, | |
491 | store_temp_crit, 1), | |
492 | SENSOR_ATTR(temp2_crit_hyst, S_IRUGO, show_temp_crit_hyst, NULL, 1), | |
493 | SENSOR_ATTR(temp2_fault, S_IRUGO, show_status, NULL, | |
ab2b79d5 | 494 | TMP401_STATUS_REMOTE_OPEN), |
2b76d80a | 495 | SENSOR_ATTR(temp2_min_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 | 496 | TMP401_STATUS_REMOTE_LOW), |
2b76d80a | 497 | SENSOR_ATTR(temp2_max_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 | 498 | TMP401_STATUS_REMOTE_HIGH), |
2b76d80a | 499 | SENSOR_ATTR(temp2_crit_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 HG |
500 | TMP401_STATUS_REMOTE_CRIT), |
501 | }; | |
502 | ||
fce0758f AP |
503 | /* |
504 | * Additional features of the TMP411 chip. | |
505 | * The TMP411 stores the minimum and maximum | |
506 | * temperature measured since power-on, chip-reset, or | |
507 | * minimum and maximum register reset for both the local | |
508 | * and remote channels. | |
509 | */ | |
510 | static struct sensor_device_attribute tmp411_attr[] = { | |
2b76d80a AP |
511 | SENSOR_ATTR(temp1_highest, S_IRUGO, show_temp_highest, NULL, 0), |
512 | SENSOR_ATTR(temp1_lowest, S_IRUGO, show_temp_lowest, NULL, 0), | |
513 | SENSOR_ATTR(temp2_highest, S_IRUGO, show_temp_highest, NULL, 1), | |
514 | SENSOR_ATTR(temp2_lowest, S_IRUGO, show_temp_lowest, NULL, 1), | |
515 | SENSOR_ATTR(temp_reset_history, S_IWUSR, NULL, reset_temp_history, 0), | |
fce0758f AP |
516 | }; |
517 | ||
ab2b79d5 HG |
518 | /* |
519 | * Begin non sysfs callback code (aka Real code) | |
520 | */ | |
521 | ||
522 | static void tmp401_init_client(struct i2c_client *client) | |
523 | { | |
524 | int config, config_orig; | |
525 | ||
526 | /* Set the conversion rate to 2 Hz */ | |
527 | i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, 5); | |
528 | ||
529 | /* Start conversions (disable shutdown if necessary) */ | |
530 | config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ); | |
531 | if (config < 0) { | |
532 | dev_warn(&client->dev, "Initialization failed!\n"); | |
533 | return; | |
534 | } | |
535 | ||
536 | config_orig = config; | |
537 | config &= ~TMP401_CONFIG_SHUTDOWN; | |
538 | ||
539 | if (config != config_orig) | |
540 | i2c_smbus_write_byte_data(client, TMP401_CONFIG_WRITE, config); | |
541 | } | |
542 | ||
310ec792 | 543 | static int tmp401_detect(struct i2c_client *client, |
ab2b79d5 HG |
544 | struct i2c_board_info *info) |
545 | { | |
dbe73c8f | 546 | enum chips kind; |
ab2b79d5 | 547 | struct i2c_adapter *adapter = client->adapter; |
dbe73c8f | 548 | u8 reg; |
ab2b79d5 HG |
549 | |
550 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
551 | return -ENODEV; | |
552 | ||
553 | /* Detect and identify the chip */ | |
dbe73c8f JD |
554 | reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG); |
555 | if (reg != TMP401_MANUFACTURER_ID) | |
556 | return -ENODEV; | |
ab2b79d5 | 557 | |
dbe73c8f | 558 | reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG); |
ab2b79d5 | 559 | |
dbe73c8f JD |
560 | switch (reg) { |
561 | case TMP401_DEVICE_ID: | |
a1fac92b GR |
562 | if (client->addr != 0x4c) |
563 | return -ENODEV; | |
dbe73c8f JD |
564 | kind = tmp401; |
565 | break; | |
4ce5b1fe GR |
566 | case TMP411A_DEVICE_ID: |
567 | if (client->addr != 0x4c) | |
568 | return -ENODEV; | |
569 | kind = tmp411; | |
570 | break; | |
571 | case TMP411B_DEVICE_ID: | |
572 | if (client->addr != 0x4d) | |
573 | return -ENODEV; | |
574 | kind = tmp411; | |
575 | break; | |
576 | case TMP411C_DEVICE_ID: | |
577 | if (client->addr != 0x4e) | |
578 | return -ENODEV; | |
dbe73c8f JD |
579 | kind = tmp411; |
580 | break; | |
a1fac92b GR |
581 | case TMP431_DEVICE_ID: |
582 | if (client->addr == 0x4e) | |
583 | return -ENODEV; | |
584 | kind = tmp431; | |
585 | break; | |
dbe73c8f JD |
586 | default: |
587 | return -ENODEV; | |
ab2b79d5 | 588 | } |
dbe73c8f JD |
589 | |
590 | reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ); | |
591 | if (reg & 0x1b) | |
592 | return -ENODEV; | |
593 | ||
594 | reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ); | |
595 | /* Datasheet says: 0x1-0x6 */ | |
596 | if (reg > 15) | |
597 | return -ENODEV; | |
598 | ||
dc71afe5 | 599 | strlcpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE); |
ab2b79d5 HG |
600 | |
601 | return 0; | |
602 | } | |
603 | ||
ea63c2b9 AP |
604 | static int tmp401_remove(struct i2c_client *client) |
605 | { | |
606 | struct tmp401_data *data = i2c_get_clientdata(client); | |
607 | int i; | |
608 | ||
609 | if (data->hwmon_dev) | |
610 | hwmon_device_unregister(data->hwmon_dev); | |
611 | ||
612 | for (i = 0; i < ARRAY_SIZE(tmp401_attr); i++) | |
613 | device_remove_file(&client->dev, &tmp401_attr[i].dev_attr); | |
614 | ||
615 | if (data->kind == tmp411) { | |
616 | for (i = 0; i < ARRAY_SIZE(tmp411_attr); i++) | |
617 | device_remove_file(&client->dev, | |
618 | &tmp411_attr[i].dev_attr); | |
619 | } | |
620 | ||
ea63c2b9 AP |
621 | return 0; |
622 | } | |
623 | ||
ab2b79d5 HG |
624 | static int tmp401_probe(struct i2c_client *client, |
625 | const struct i2c_device_id *id) | |
626 | { | |
627 | int i, err = 0; | |
628 | struct tmp401_data *data; | |
a1fac92b | 629 | const char *names[] = { "TMP401", "TMP411", "TMP431" }; |
ab2b79d5 | 630 | |
0df9fc7b GR |
631 | data = devm_kzalloc(&client->dev, sizeof(struct tmp401_data), |
632 | GFP_KERNEL); | |
ab2b79d5 HG |
633 | if (!data) |
634 | return -ENOMEM; | |
635 | ||
636 | i2c_set_clientdata(client, data); | |
637 | mutex_init(&data->update_lock); | |
fce0758f | 638 | data->kind = id->driver_data; |
ab2b79d5 HG |
639 | |
640 | /* Initialize the TMP401 chip */ | |
641 | tmp401_init_client(client); | |
642 | ||
643 | /* Register sysfs hooks */ | |
644 | for (i = 0; i < ARRAY_SIZE(tmp401_attr); i++) { | |
645 | err = device_create_file(&client->dev, | |
646 | &tmp401_attr[i].dev_attr); | |
647 | if (err) | |
648 | goto exit_remove; | |
649 | } | |
650 | ||
a80581d0 | 651 | /* Register additional tmp411 sysfs hooks */ |
fce0758f AP |
652 | if (data->kind == tmp411) { |
653 | for (i = 0; i < ARRAY_SIZE(tmp411_attr); i++) { | |
654 | err = device_create_file(&client->dev, | |
655 | &tmp411_attr[i].dev_attr); | |
656 | if (err) | |
657 | goto exit_remove; | |
658 | } | |
659 | } | |
660 | ||
ab2b79d5 HG |
661 | data->hwmon_dev = hwmon_device_register(&client->dev); |
662 | if (IS_ERR(data->hwmon_dev)) { | |
663 | err = PTR_ERR(data->hwmon_dev); | |
664 | data->hwmon_dev = NULL; | |
665 | goto exit_remove; | |
666 | } | |
667 | ||
dc71afe5 | 668 | dev_info(&client->dev, "Detected TI %s chip\n", names[data->kind]); |
ab2b79d5 HG |
669 | |
670 | return 0; | |
671 | ||
672 | exit_remove: | |
0df9fc7b | 673 | tmp401_remove(client); |
ab2b79d5 HG |
674 | return err; |
675 | } | |
676 | ||
ea63c2b9 AP |
677 | static struct i2c_driver tmp401_driver = { |
678 | .class = I2C_CLASS_HWMON, | |
679 | .driver = { | |
680 | .name = "tmp401", | |
681 | }, | |
682 | .probe = tmp401_probe, | |
683 | .remove = tmp401_remove, | |
684 | .id_table = tmp401_id, | |
685 | .detect = tmp401_detect, | |
686 | .address_list = normal_i2c, | |
687 | }; | |
ab2b79d5 | 688 | |
f0967eea | 689 | module_i2c_driver(tmp401_driver); |
ab2b79d5 HG |
690 | |
691 | MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); | |
692 | MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver"); | |
693 | MODULE_LICENSE("GPL"); |