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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 | |
fce0758f | 92 | #define TMP411_DEVICE_ID 0x12 |
a1fac92b | 93 | #define TMP431_DEVICE_ID 0x31 |
ab2b79d5 | 94 | |
ab2b79d5 HG |
95 | /* |
96 | * Driver data (common to all clients) | |
97 | */ | |
98 | ||
99 | static const struct i2c_device_id tmp401_id[] = { | |
100 | { "tmp401", tmp401 }, | |
fce0758f | 101 | { "tmp411", tmp411 }, |
a1fac92b | 102 | { "tmp431", tmp431 }, |
ab2b79d5 HG |
103 | { } |
104 | }; | |
105 | MODULE_DEVICE_TABLE(i2c, tmp401_id); | |
106 | ||
ab2b79d5 HG |
107 | /* |
108 | * Client data (each client gets its own) | |
109 | */ | |
110 | ||
111 | struct tmp401_data { | |
112 | struct device *hwmon_dev; | |
113 | struct mutex update_lock; | |
114 | char valid; /* zero until following fields are valid */ | |
115 | unsigned long last_updated; /* in jiffies */ | |
dc71afe5 | 116 | enum chips kind; |
ab2b79d5 HG |
117 | |
118 | /* register values */ | |
119 | u8 status; | |
120 | u8 config; | |
121 | u16 temp[2]; | |
122 | u16 temp_low[2]; | |
123 | u16 temp_high[2]; | |
124 | u8 temp_crit[2]; | |
125 | u8 temp_crit_hyst; | |
fce0758f AP |
126 | u16 temp_lowest[2]; |
127 | u16 temp_highest[2]; | |
ab2b79d5 HG |
128 | }; |
129 | ||
130 | /* | |
131 | * Sysfs attr show / store functions | |
132 | */ | |
133 | ||
134 | static int tmp401_register_to_temp(u16 reg, u8 config) | |
135 | { | |
136 | int temp = reg; | |
137 | ||
138 | if (config & TMP401_CONFIG_RANGE) | |
139 | temp -= 64 * 256; | |
140 | ||
141 | return (temp * 625 + 80) / 160; | |
142 | } | |
143 | ||
144 | static u16 tmp401_temp_to_register(long temp, u8 config) | |
145 | { | |
146 | if (config & TMP401_CONFIG_RANGE) { | |
2a844c14 | 147 | temp = clamp_val(temp, -64000, 191000); |
ab2b79d5 HG |
148 | temp += 64000; |
149 | } else | |
2a844c14 | 150 | temp = clamp_val(temp, 0, 127000); |
ab2b79d5 HG |
151 | |
152 | return (temp * 160 + 312) / 625; | |
153 | } | |
154 | ||
155 | static int tmp401_crit_register_to_temp(u8 reg, u8 config) | |
156 | { | |
157 | int temp = reg; | |
158 | ||
159 | if (config & TMP401_CONFIG_RANGE) | |
160 | temp -= 64; | |
161 | ||
162 | return temp * 1000; | |
163 | } | |
164 | ||
165 | static u8 tmp401_crit_temp_to_register(long temp, u8 config) | |
166 | { | |
167 | if (config & TMP401_CONFIG_RANGE) { | |
2a844c14 | 168 | temp = clamp_val(temp, -64000, 191000); |
ab2b79d5 HG |
169 | temp += 64000; |
170 | } else | |
2a844c14 | 171 | temp = clamp_val(temp, 0, 127000); |
ab2b79d5 HG |
172 | |
173 | return (temp + 500) / 1000; | |
174 | } | |
175 | ||
ea63c2b9 AP |
176 | static struct tmp401_data *tmp401_update_device_reg16( |
177 | struct i2c_client *client, struct tmp401_data *data) | |
178 | { | |
179 | int i; | |
180 | ||
181 | for (i = 0; i < 2; i++) { | |
182 | /* | |
183 | * High byte must be read first immediately followed | |
184 | * by the low byte | |
185 | */ | |
186 | data->temp[i] = i2c_smbus_read_byte_data(client, | |
187 | TMP401_TEMP_MSB[i]) << 8; | |
188 | data->temp[i] |= i2c_smbus_read_byte_data(client, | |
189 | TMP401_TEMP_LSB[i]); | |
190 | data->temp_low[i] = i2c_smbus_read_byte_data(client, | |
191 | TMP401_TEMP_LOW_LIMIT_MSB_READ[i]) << 8; | |
192 | data->temp_low[i] |= i2c_smbus_read_byte_data(client, | |
193 | TMP401_TEMP_LOW_LIMIT_LSB[i]); | |
194 | data->temp_high[i] = i2c_smbus_read_byte_data(client, | |
195 | TMP401_TEMP_HIGH_LIMIT_MSB_READ[i]) << 8; | |
196 | data->temp_high[i] |= i2c_smbus_read_byte_data(client, | |
197 | TMP401_TEMP_HIGH_LIMIT_LSB[i]); | |
198 | data->temp_crit[i] = i2c_smbus_read_byte_data(client, | |
199 | TMP401_TEMP_CRIT_LIMIT[i]); | |
200 | ||
201 | if (data->kind == tmp411) { | |
202 | data->temp_lowest[i] = i2c_smbus_read_byte_data(client, | |
203 | TMP411_TEMP_LOWEST_MSB[i]) << 8; | |
204 | data->temp_lowest[i] |= i2c_smbus_read_byte_data( | |
205 | client, TMP411_TEMP_LOWEST_LSB[i]); | |
206 | ||
207 | data->temp_highest[i] = i2c_smbus_read_byte_data( | |
208 | client, TMP411_TEMP_HIGHEST_MSB[i]) << 8; | |
209 | data->temp_highest[i] |= i2c_smbus_read_byte_data( | |
210 | client, TMP411_TEMP_HIGHEST_LSB[i]); | |
211 | } | |
212 | } | |
213 | return data; | |
214 | } | |
215 | ||
216 | static struct tmp401_data *tmp401_update_device(struct device *dev) | |
217 | { | |
218 | struct i2c_client *client = to_i2c_client(dev); | |
219 | struct tmp401_data *data = i2c_get_clientdata(client); | |
220 | ||
221 | mutex_lock(&data->update_lock); | |
222 | ||
223 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
224 | data->status = i2c_smbus_read_byte_data(client, TMP401_STATUS); | |
225 | data->config = i2c_smbus_read_byte_data(client, | |
226 | TMP401_CONFIG_READ); | |
227 | tmp401_update_device_reg16(client, data); | |
228 | ||
229 | data->temp_crit_hyst = i2c_smbus_read_byte_data(client, | |
230 | TMP401_TEMP_CRIT_HYST); | |
231 | ||
232 | data->last_updated = jiffies; | |
233 | data->valid = 1; | |
234 | } | |
235 | ||
236 | mutex_unlock(&data->update_lock); | |
237 | ||
238 | return data; | |
239 | } | |
240 | ||
ab2b79d5 HG |
241 | static ssize_t show_temp_value(struct device *dev, |
242 | struct device_attribute *devattr, char *buf) | |
243 | { | |
244 | int index = to_sensor_dev_attr(devattr)->index; | |
245 | struct tmp401_data *data = tmp401_update_device(dev); | |
246 | ||
247 | return sprintf(buf, "%d\n", | |
248 | tmp401_register_to_temp(data->temp[index], data->config)); | |
249 | } | |
250 | ||
251 | static ssize_t show_temp_min(struct device *dev, | |
252 | struct device_attribute *devattr, char *buf) | |
253 | { | |
254 | int index = to_sensor_dev_attr(devattr)->index; | |
255 | struct tmp401_data *data = tmp401_update_device(dev); | |
256 | ||
257 | return sprintf(buf, "%d\n", | |
258 | tmp401_register_to_temp(data->temp_low[index], data->config)); | |
259 | } | |
260 | ||
261 | static ssize_t show_temp_max(struct device *dev, | |
262 | struct device_attribute *devattr, char *buf) | |
263 | { | |
264 | int index = to_sensor_dev_attr(devattr)->index; | |
265 | struct tmp401_data *data = tmp401_update_device(dev); | |
266 | ||
267 | return sprintf(buf, "%d\n", | |
268 | tmp401_register_to_temp(data->temp_high[index], data->config)); | |
269 | } | |
270 | ||
271 | static ssize_t show_temp_crit(struct device *dev, | |
272 | struct device_attribute *devattr, char *buf) | |
273 | { | |
274 | int index = to_sensor_dev_attr(devattr)->index; | |
275 | struct tmp401_data *data = tmp401_update_device(dev); | |
276 | ||
277 | return sprintf(buf, "%d\n", | |
278 | tmp401_crit_register_to_temp(data->temp_crit[index], | |
279 | data->config)); | |
280 | } | |
281 | ||
282 | static ssize_t show_temp_crit_hyst(struct device *dev, | |
283 | struct device_attribute *devattr, char *buf) | |
284 | { | |
285 | int temp, index = to_sensor_dev_attr(devattr)->index; | |
286 | struct tmp401_data *data = tmp401_update_device(dev); | |
287 | ||
288 | mutex_lock(&data->update_lock); | |
289 | temp = tmp401_crit_register_to_temp(data->temp_crit[index], | |
290 | data->config); | |
291 | temp -= data->temp_crit_hyst * 1000; | |
292 | mutex_unlock(&data->update_lock); | |
293 | ||
294 | return sprintf(buf, "%d\n", temp); | |
295 | } | |
296 | ||
fce0758f AP |
297 | static ssize_t show_temp_lowest(struct device *dev, |
298 | struct device_attribute *devattr, char *buf) | |
299 | { | |
300 | int index = to_sensor_dev_attr(devattr)->index; | |
301 | struct tmp401_data *data = tmp401_update_device(dev); | |
302 | ||
303 | return sprintf(buf, "%d\n", | |
304 | tmp401_register_to_temp(data->temp_lowest[index], | |
305 | data->config)); | |
306 | } | |
307 | ||
308 | static ssize_t show_temp_highest(struct device *dev, | |
309 | struct device_attribute *devattr, char *buf) | |
310 | { | |
311 | int index = to_sensor_dev_attr(devattr)->index; | |
312 | struct tmp401_data *data = tmp401_update_device(dev); | |
313 | ||
314 | return sprintf(buf, "%d\n", | |
315 | tmp401_register_to_temp(data->temp_highest[index], | |
316 | data->config)); | |
317 | } | |
318 | ||
ab2b79d5 HG |
319 | static ssize_t show_status(struct device *dev, |
320 | struct device_attribute *devattr, char *buf) | |
321 | { | |
322 | int mask = to_sensor_dev_attr(devattr)->index; | |
323 | struct tmp401_data *data = tmp401_update_device(dev); | |
324 | ||
325 | if (data->status & mask) | |
326 | return sprintf(buf, "1\n"); | |
327 | else | |
328 | return sprintf(buf, "0\n"); | |
329 | } | |
330 | ||
331 | static ssize_t store_temp_min(struct device *dev, struct device_attribute | |
332 | *devattr, const char *buf, size_t count) | |
333 | { | |
334 | int index = to_sensor_dev_attr(devattr)->index; | |
335 | struct tmp401_data *data = tmp401_update_device(dev); | |
336 | long val; | |
337 | u16 reg; | |
338 | ||
179c4fdb | 339 | if (kstrtol(buf, 10, &val)) |
ab2b79d5 HG |
340 | return -EINVAL; |
341 | ||
342 | reg = tmp401_temp_to_register(val, data->config); | |
343 | ||
344 | mutex_lock(&data->update_lock); | |
345 | ||
346 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
347 | TMP401_TEMP_LOW_LIMIT_MSB_WRITE[index], reg >> 8); | |
348 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
349 | TMP401_TEMP_LOW_LIMIT_LSB[index], reg & 0xFF); | |
350 | ||
351 | data->temp_low[index] = reg; | |
352 | ||
353 | mutex_unlock(&data->update_lock); | |
354 | ||
355 | return count; | |
356 | } | |
357 | ||
358 | static ssize_t store_temp_max(struct device *dev, struct device_attribute | |
359 | *devattr, const char *buf, size_t count) | |
360 | { | |
361 | int index = to_sensor_dev_attr(devattr)->index; | |
362 | struct tmp401_data *data = tmp401_update_device(dev); | |
363 | long val; | |
364 | u16 reg; | |
365 | ||
179c4fdb | 366 | if (kstrtol(buf, 10, &val)) |
ab2b79d5 HG |
367 | return -EINVAL; |
368 | ||
369 | reg = tmp401_temp_to_register(val, data->config); | |
370 | ||
371 | mutex_lock(&data->update_lock); | |
372 | ||
373 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
374 | TMP401_TEMP_HIGH_LIMIT_MSB_WRITE[index], reg >> 8); | |
375 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
376 | TMP401_TEMP_HIGH_LIMIT_LSB[index], reg & 0xFF); | |
377 | ||
378 | data->temp_high[index] = reg; | |
379 | ||
380 | mutex_unlock(&data->update_lock); | |
381 | ||
382 | return count; | |
383 | } | |
384 | ||
385 | static ssize_t store_temp_crit(struct device *dev, struct device_attribute | |
386 | *devattr, const char *buf, size_t count) | |
387 | { | |
388 | int index = to_sensor_dev_attr(devattr)->index; | |
389 | struct tmp401_data *data = tmp401_update_device(dev); | |
390 | long val; | |
391 | u8 reg; | |
392 | ||
179c4fdb | 393 | if (kstrtol(buf, 10, &val)) |
ab2b79d5 HG |
394 | return -EINVAL; |
395 | ||
396 | reg = tmp401_crit_temp_to_register(val, data->config); | |
397 | ||
398 | mutex_lock(&data->update_lock); | |
399 | ||
400 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
401 | TMP401_TEMP_CRIT_LIMIT[index], reg); | |
402 | ||
403 | data->temp_crit[index] = reg; | |
404 | ||
405 | mutex_unlock(&data->update_lock); | |
406 | ||
407 | return count; | |
408 | } | |
409 | ||
410 | static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute | |
411 | *devattr, const char *buf, size_t count) | |
412 | { | |
413 | int temp, index = to_sensor_dev_attr(devattr)->index; | |
414 | struct tmp401_data *data = tmp401_update_device(dev); | |
415 | long val; | |
416 | u8 reg; | |
417 | ||
179c4fdb | 418 | if (kstrtol(buf, 10, &val)) |
ab2b79d5 HG |
419 | return -EINVAL; |
420 | ||
421 | if (data->config & TMP401_CONFIG_RANGE) | |
2a844c14 | 422 | val = clamp_val(val, -64000, 191000); |
ab2b79d5 | 423 | else |
2a844c14 | 424 | val = clamp_val(val, 0, 127000); |
ab2b79d5 HG |
425 | |
426 | mutex_lock(&data->update_lock); | |
427 | temp = tmp401_crit_register_to_temp(data->temp_crit[index], | |
428 | data->config); | |
2a844c14 | 429 | val = clamp_val(val, temp - 255000, temp); |
ab2b79d5 HG |
430 | reg = ((temp - val) + 500) / 1000; |
431 | ||
432 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
433 | TMP401_TEMP_CRIT_HYST, reg); | |
434 | ||
435 | data->temp_crit_hyst = reg; | |
436 | ||
437 | mutex_unlock(&data->update_lock); | |
438 | ||
439 | return count; | |
440 | } | |
441 | ||
fce0758f AP |
442 | /* |
443 | * Resets the historical measurements of minimum and maximum temperatures. | |
444 | * This is done by writing any value to any of the minimum/maximum registers | |
445 | * (0x30-0x37). | |
446 | */ | |
447 | static ssize_t reset_temp_history(struct device *dev, | |
448 | struct device_attribute *devattr, const char *buf, size_t count) | |
449 | { | |
450 | long val; | |
451 | ||
179c4fdb | 452 | if (kstrtol(buf, 10, &val)) |
fce0758f AP |
453 | return -EINVAL; |
454 | ||
455 | if (val != 1) { | |
b55f3757 GR |
456 | dev_err(dev, |
457 | "temp_reset_history value %ld not supported. Use 1 to reset the history!\n", | |
458 | val); | |
fce0758f AP |
459 | return -EINVAL; |
460 | } | |
461 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
462 | TMP411_TEMP_LOWEST_MSB[0], val); | |
463 | ||
464 | return count; | |
465 | } | |
466 | ||
ab2b79d5 | 467 | static struct sensor_device_attribute tmp401_attr[] = { |
2b76d80a AP |
468 | SENSOR_ATTR(temp1_input, S_IRUGO, show_temp_value, NULL, 0), |
469 | SENSOR_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min, | |
470 | store_temp_min, 0), | |
471 | SENSOR_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, | |
472 | store_temp_max, 0), | |
473 | SENSOR_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_crit, | |
474 | store_temp_crit, 0), | |
475 | SENSOR_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_crit_hyst, | |
ab2b79d5 | 476 | store_temp_crit_hyst, 0), |
2b76d80a | 477 | SENSOR_ATTR(temp1_min_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 | 478 | TMP401_STATUS_LOCAL_LOW), |
2b76d80a | 479 | SENSOR_ATTR(temp1_max_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 | 480 | TMP401_STATUS_LOCAL_HIGH), |
2b76d80a | 481 | SENSOR_ATTR(temp1_crit_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 | 482 | TMP401_STATUS_LOCAL_CRIT), |
2b76d80a AP |
483 | SENSOR_ATTR(temp2_input, S_IRUGO, show_temp_value, NULL, 1), |
484 | SENSOR_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min, | |
485 | store_temp_min, 1), | |
486 | SENSOR_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max, | |
487 | store_temp_max, 1), | |
488 | SENSOR_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp_crit, | |
489 | store_temp_crit, 1), | |
490 | SENSOR_ATTR(temp2_crit_hyst, S_IRUGO, show_temp_crit_hyst, NULL, 1), | |
491 | SENSOR_ATTR(temp2_fault, S_IRUGO, show_status, NULL, | |
ab2b79d5 | 492 | TMP401_STATUS_REMOTE_OPEN), |
2b76d80a | 493 | SENSOR_ATTR(temp2_min_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 | 494 | TMP401_STATUS_REMOTE_LOW), |
2b76d80a | 495 | SENSOR_ATTR(temp2_max_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 | 496 | TMP401_STATUS_REMOTE_HIGH), |
2b76d80a | 497 | SENSOR_ATTR(temp2_crit_alarm, S_IRUGO, show_status, NULL, |
ab2b79d5 HG |
498 | TMP401_STATUS_REMOTE_CRIT), |
499 | }; | |
500 | ||
fce0758f AP |
501 | /* |
502 | * Additional features of the TMP411 chip. | |
503 | * The TMP411 stores the minimum and maximum | |
504 | * temperature measured since power-on, chip-reset, or | |
505 | * minimum and maximum register reset for both the local | |
506 | * and remote channels. | |
507 | */ | |
508 | static struct sensor_device_attribute tmp411_attr[] = { | |
2b76d80a AP |
509 | SENSOR_ATTR(temp1_highest, S_IRUGO, show_temp_highest, NULL, 0), |
510 | SENSOR_ATTR(temp1_lowest, S_IRUGO, show_temp_lowest, NULL, 0), | |
511 | SENSOR_ATTR(temp2_highest, S_IRUGO, show_temp_highest, NULL, 1), | |
512 | SENSOR_ATTR(temp2_lowest, S_IRUGO, show_temp_lowest, NULL, 1), | |
513 | SENSOR_ATTR(temp_reset_history, S_IWUSR, NULL, reset_temp_history, 0), | |
fce0758f AP |
514 | }; |
515 | ||
ab2b79d5 HG |
516 | /* |
517 | * Begin non sysfs callback code (aka Real code) | |
518 | */ | |
519 | ||
520 | static void tmp401_init_client(struct i2c_client *client) | |
521 | { | |
522 | int config, config_orig; | |
523 | ||
524 | /* Set the conversion rate to 2 Hz */ | |
525 | i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, 5); | |
526 | ||
527 | /* Start conversions (disable shutdown if necessary) */ | |
528 | config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ); | |
529 | if (config < 0) { | |
530 | dev_warn(&client->dev, "Initialization failed!\n"); | |
531 | return; | |
532 | } | |
533 | ||
534 | config_orig = config; | |
535 | config &= ~TMP401_CONFIG_SHUTDOWN; | |
536 | ||
537 | if (config != config_orig) | |
538 | i2c_smbus_write_byte_data(client, TMP401_CONFIG_WRITE, config); | |
539 | } | |
540 | ||
310ec792 | 541 | static int tmp401_detect(struct i2c_client *client, |
ab2b79d5 HG |
542 | struct i2c_board_info *info) |
543 | { | |
dbe73c8f | 544 | enum chips kind; |
ab2b79d5 | 545 | struct i2c_adapter *adapter = client->adapter; |
dbe73c8f | 546 | u8 reg; |
ab2b79d5 HG |
547 | |
548 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
549 | return -ENODEV; | |
550 | ||
551 | /* Detect and identify the chip */ | |
dbe73c8f JD |
552 | reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG); |
553 | if (reg != TMP401_MANUFACTURER_ID) | |
554 | return -ENODEV; | |
ab2b79d5 | 555 | |
dbe73c8f | 556 | reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG); |
ab2b79d5 | 557 | |
dbe73c8f JD |
558 | switch (reg) { |
559 | case TMP401_DEVICE_ID: | |
a1fac92b GR |
560 | if (client->addr != 0x4c) |
561 | return -ENODEV; | |
dbe73c8f JD |
562 | kind = tmp401; |
563 | break; | |
564 | case TMP411_DEVICE_ID: | |
565 | kind = tmp411; | |
566 | break; | |
a1fac92b GR |
567 | case TMP431_DEVICE_ID: |
568 | if (client->addr == 0x4e) | |
569 | return -ENODEV; | |
570 | kind = tmp431; | |
571 | break; | |
dbe73c8f JD |
572 | default: |
573 | return -ENODEV; | |
ab2b79d5 | 574 | } |
dbe73c8f JD |
575 | |
576 | reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ); | |
577 | if (reg & 0x1b) | |
578 | return -ENODEV; | |
579 | ||
580 | reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ); | |
581 | /* Datasheet says: 0x1-0x6 */ | |
582 | if (reg > 15) | |
583 | return -ENODEV; | |
584 | ||
dc71afe5 | 585 | strlcpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE); |
ab2b79d5 HG |
586 | |
587 | return 0; | |
588 | } | |
589 | ||
ea63c2b9 AP |
590 | static int tmp401_remove(struct i2c_client *client) |
591 | { | |
592 | struct tmp401_data *data = i2c_get_clientdata(client); | |
593 | int i; | |
594 | ||
595 | if (data->hwmon_dev) | |
596 | hwmon_device_unregister(data->hwmon_dev); | |
597 | ||
598 | for (i = 0; i < ARRAY_SIZE(tmp401_attr); i++) | |
599 | device_remove_file(&client->dev, &tmp401_attr[i].dev_attr); | |
600 | ||
601 | if (data->kind == tmp411) { | |
602 | for (i = 0; i < ARRAY_SIZE(tmp411_attr); i++) | |
603 | device_remove_file(&client->dev, | |
604 | &tmp411_attr[i].dev_attr); | |
605 | } | |
606 | ||
ea63c2b9 AP |
607 | return 0; |
608 | } | |
609 | ||
ab2b79d5 HG |
610 | static int tmp401_probe(struct i2c_client *client, |
611 | const struct i2c_device_id *id) | |
612 | { | |
613 | int i, err = 0; | |
614 | struct tmp401_data *data; | |
a1fac92b | 615 | const char *names[] = { "TMP401", "TMP411", "TMP431" }; |
ab2b79d5 | 616 | |
0df9fc7b GR |
617 | data = devm_kzalloc(&client->dev, sizeof(struct tmp401_data), |
618 | GFP_KERNEL); | |
ab2b79d5 HG |
619 | if (!data) |
620 | return -ENOMEM; | |
621 | ||
622 | i2c_set_clientdata(client, data); | |
623 | mutex_init(&data->update_lock); | |
fce0758f | 624 | data->kind = id->driver_data; |
ab2b79d5 HG |
625 | |
626 | /* Initialize the TMP401 chip */ | |
627 | tmp401_init_client(client); | |
628 | ||
629 | /* Register sysfs hooks */ | |
630 | for (i = 0; i < ARRAY_SIZE(tmp401_attr); i++) { | |
631 | err = device_create_file(&client->dev, | |
632 | &tmp401_attr[i].dev_attr); | |
633 | if (err) | |
634 | goto exit_remove; | |
635 | } | |
636 | ||
a80581d0 | 637 | /* Register additional tmp411 sysfs hooks */ |
fce0758f AP |
638 | if (data->kind == tmp411) { |
639 | for (i = 0; i < ARRAY_SIZE(tmp411_attr); i++) { | |
640 | err = device_create_file(&client->dev, | |
641 | &tmp411_attr[i].dev_attr); | |
642 | if (err) | |
643 | goto exit_remove; | |
644 | } | |
645 | } | |
646 | ||
ab2b79d5 HG |
647 | data->hwmon_dev = hwmon_device_register(&client->dev); |
648 | if (IS_ERR(data->hwmon_dev)) { | |
649 | err = PTR_ERR(data->hwmon_dev); | |
650 | data->hwmon_dev = NULL; | |
651 | goto exit_remove; | |
652 | } | |
653 | ||
dc71afe5 | 654 | dev_info(&client->dev, "Detected TI %s chip\n", names[data->kind]); |
ab2b79d5 HG |
655 | |
656 | return 0; | |
657 | ||
658 | exit_remove: | |
0df9fc7b | 659 | tmp401_remove(client); |
ab2b79d5 HG |
660 | return err; |
661 | } | |
662 | ||
ea63c2b9 AP |
663 | static struct i2c_driver tmp401_driver = { |
664 | .class = I2C_CLASS_HWMON, | |
665 | .driver = { | |
666 | .name = "tmp401", | |
667 | }, | |
668 | .probe = tmp401_probe, | |
669 | .remove = tmp401_remove, | |
670 | .id_table = tmp401_id, | |
671 | .detect = tmp401_detect, | |
672 | .address_list = normal_i2c, | |
673 | }; | |
ab2b79d5 | 674 | |
f0967eea | 675 | module_i2c_driver(tmp401_driver); |
ab2b79d5 HG |
676 | |
677 | MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); | |
678 | MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver"); | |
679 | MODULE_LICENSE("GPL"); |