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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> | |
947e9271 | 33 | #include <linux/bitops.h> |
ab2b79d5 HG |
34 | #include <linux/slab.h> |
35 | #include <linux/jiffies.h> | |
36 | #include <linux/i2c.h> | |
37 | #include <linux/hwmon.h> | |
38 | #include <linux/hwmon-sysfs.h> | |
39 | #include <linux/err.h> | |
40 | #include <linux/mutex.h> | |
41 | #include <linux/sysfs.h> | |
42 | ||
43 | /* Addresses to scan */ | |
a1fac92b | 44 | static const unsigned short normal_i2c[] = { 0x4c, 0x4d, 0x4e, I2C_CLIENT_END }; |
ab2b79d5 | 45 | |
a1fac92b | 46 | enum chips { tmp401, tmp411, tmp431 }; |
ab2b79d5 HG |
47 | |
48 | /* | |
49 | * The TMP401 registers, note some registers have different addresses for | |
50 | * reading and writing | |
51 | */ | |
52 | #define TMP401_STATUS 0x02 | |
53 | #define TMP401_CONFIG_READ 0x03 | |
54 | #define TMP401_CONFIG_WRITE 0x09 | |
55 | #define TMP401_CONVERSION_RATE_READ 0x04 | |
56 | #define TMP401_CONVERSION_RATE_WRITE 0x0A | |
57 | #define TMP401_TEMP_CRIT_HYST 0x21 | |
ab2b79d5 HG |
58 | #define TMP401_MANUFACTURER_ID_REG 0xFE |
59 | #define TMP401_DEVICE_ID_REG 0xFF | |
60 | ||
14f2a665 GR |
61 | static const u8 TMP401_TEMP_MSB_READ[6][2] = { |
62 | { 0x00, 0x01 }, /* temp */ | |
63 | { 0x06, 0x08 }, /* low limit */ | |
64 | { 0x05, 0x07 }, /* high limit */ | |
65 | { 0x20, 0x19 }, /* therm (crit) limit */ | |
66 | { 0x30, 0x34 }, /* lowest */ | |
67 | { 0x32, 0x36 }, /* highest */ | |
68 | }; | |
69 | ||
70 | static const u8 TMP401_TEMP_MSB_WRITE[6][2] = { | |
71 | { 0, 0 }, /* temp (unused) */ | |
72 | { 0x0C, 0x0E }, /* low limit */ | |
73 | { 0x0B, 0x0D }, /* high limit */ | |
74 | { 0x20, 0x19 }, /* therm (crit) limit */ | |
75 | { 0x30, 0x34 }, /* lowest */ | |
76 | { 0x32, 0x36 }, /* highest */ | |
77 | }; | |
78 | ||
79 | static const u8 TMP401_TEMP_LSB[6][2] = { | |
80 | { 0x15, 0x10 }, /* temp */ | |
81 | { 0x17, 0x14 }, /* low limit */ | |
82 | { 0x16, 0x13 }, /* high limit */ | |
83 | { 0, 0 }, /* therm (crit) limit (unused) */ | |
84 | { 0x31, 0x35 }, /* lowest */ | |
85 | { 0x33, 0x37 }, /* highest */ | |
86 | }; | |
fce0758f | 87 | |
ab2b79d5 | 88 | /* Flags */ |
947e9271 GR |
89 | #define TMP401_CONFIG_RANGE BIT(2) |
90 | #define TMP401_CONFIG_SHUTDOWN BIT(6) | |
91 | #define TMP401_STATUS_LOCAL_CRIT BIT(0) | |
92 | #define TMP401_STATUS_REMOTE_CRIT BIT(1) | |
93 | #define TMP401_STATUS_REMOTE_OPEN BIT(2) | |
94 | #define TMP401_STATUS_REMOTE_LOW BIT(3) | |
95 | #define TMP401_STATUS_REMOTE_HIGH BIT(4) | |
96 | #define TMP401_STATUS_LOCAL_LOW BIT(5) | |
97 | #define TMP401_STATUS_LOCAL_HIGH BIT(6) | |
ab2b79d5 HG |
98 | |
99 | /* Manufacturer / Device ID's */ | |
100 | #define TMP401_MANUFACTURER_ID 0x55 | |
101 | #define TMP401_DEVICE_ID 0x11 | |
4ce5b1fe GR |
102 | #define TMP411A_DEVICE_ID 0x12 |
103 | #define TMP411B_DEVICE_ID 0x13 | |
104 | #define TMP411C_DEVICE_ID 0x10 | |
a1fac92b | 105 | #define TMP431_DEVICE_ID 0x31 |
ab2b79d5 | 106 | |
ab2b79d5 HG |
107 | /* |
108 | * Driver data (common to all clients) | |
109 | */ | |
110 | ||
111 | static const struct i2c_device_id tmp401_id[] = { | |
112 | { "tmp401", tmp401 }, | |
fce0758f | 113 | { "tmp411", tmp411 }, |
a1fac92b | 114 | { "tmp431", tmp431 }, |
ab2b79d5 HG |
115 | { } |
116 | }; | |
117 | MODULE_DEVICE_TABLE(i2c, tmp401_id); | |
118 | ||
ab2b79d5 HG |
119 | /* |
120 | * Client data (each client gets its own) | |
121 | */ | |
122 | ||
123 | struct tmp401_data { | |
124 | struct device *hwmon_dev; | |
125 | struct mutex update_lock; | |
126 | char valid; /* zero until following fields are valid */ | |
127 | unsigned long last_updated; /* in jiffies */ | |
dc71afe5 | 128 | enum chips kind; |
ab2b79d5 HG |
129 | |
130 | /* register values */ | |
131 | u8 status; | |
132 | u8 config; | |
14f2a665 | 133 | u16 temp[6][2]; |
ab2b79d5 HG |
134 | u8 temp_crit_hyst; |
135 | }; | |
136 | ||
137 | /* | |
138 | * Sysfs attr show / store functions | |
139 | */ | |
140 | ||
141 | static int tmp401_register_to_temp(u16 reg, u8 config) | |
142 | { | |
143 | int temp = reg; | |
144 | ||
145 | if (config & TMP401_CONFIG_RANGE) | |
146 | temp -= 64 * 256; | |
147 | ||
14f2a665 | 148 | return DIV_ROUND_CLOSEST(temp * 125, 32); |
ab2b79d5 HG |
149 | } |
150 | ||
14f2a665 | 151 | static u16 tmp401_temp_to_register(long temp, u8 config, int zbits) |
ab2b79d5 HG |
152 | { |
153 | if (config & TMP401_CONFIG_RANGE) { | |
2a844c14 | 154 | temp = clamp_val(temp, -64000, 191000); |
ab2b79d5 HG |
155 | temp += 64000; |
156 | } else | |
2a844c14 | 157 | temp = clamp_val(temp, 0, 127000); |
ab2b79d5 | 158 | |
14f2a665 | 159 | return DIV_ROUND_CLOSEST(temp * (1 << (8 - zbits)), 1000) << zbits; |
ab2b79d5 HG |
160 | } |
161 | ||
14f2a665 GR |
162 | static int tmp401_update_device_reg16(struct i2c_client *client, |
163 | struct tmp401_data *data) | |
ea63c2b9 | 164 | { |
14f2a665 GR |
165 | int i, j, val; |
166 | int num_regs = data->kind == tmp411 ? 6 : 4; | |
167 | ||
168 | for (i = 0; i < 2; i++) { /* local / rem1 */ | |
169 | for (j = 0; j < num_regs; j++) { /* temp / low / ... */ | |
170 | /* | |
171 | * High byte must be read first immediately followed | |
172 | * by the low byte | |
173 | */ | |
174 | val = i2c_smbus_read_byte_data(client, | |
175 | TMP401_TEMP_MSB_READ[j][i]); | |
176 | if (val < 0) | |
177 | return val; | |
178 | data->temp[j][i] = val << 8; | |
179 | if (j == 3) /* crit is msb only */ | |
180 | continue; | |
181 | val = i2c_smbus_read_byte_data(client, | |
182 | TMP401_TEMP_LSB[j][i]); | |
183 | if (val < 0) | |
184 | return val; | |
185 | data->temp[j][i] |= val; | |
ea63c2b9 AP |
186 | } |
187 | } | |
14f2a665 | 188 | return 0; |
ea63c2b9 AP |
189 | } |
190 | ||
191 | static struct tmp401_data *tmp401_update_device(struct device *dev) | |
192 | { | |
193 | struct i2c_client *client = to_i2c_client(dev); | |
194 | struct tmp401_data *data = i2c_get_clientdata(client); | |
14f2a665 GR |
195 | struct tmp401_data *ret = data; |
196 | int val; | |
ea63c2b9 AP |
197 | |
198 | mutex_lock(&data->update_lock); | |
199 | ||
200 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
14f2a665 GR |
201 | val = i2c_smbus_read_byte_data(client, TMP401_STATUS); |
202 | if (val < 0) { | |
203 | ret = ERR_PTR(val); | |
204 | goto abort; | |
205 | } | |
206 | data->status = val; | |
207 | val = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ); | |
208 | if (val < 0) { | |
209 | ret = ERR_PTR(val); | |
210 | goto abort; | |
211 | } | |
212 | data->config = val; | |
213 | val = tmp401_update_device_reg16(client, data); | |
214 | if (val < 0) { | |
215 | ret = ERR_PTR(val); | |
216 | goto abort; | |
217 | } | |
218 | val = i2c_smbus_read_byte_data(client, TMP401_TEMP_CRIT_HYST); | |
219 | if (val < 0) { | |
220 | ret = ERR_PTR(val); | |
221 | goto abort; | |
222 | } | |
223 | data->temp_crit_hyst = val; | |
ea63c2b9 AP |
224 | |
225 | data->last_updated = jiffies; | |
226 | data->valid = 1; | |
227 | } | |
228 | ||
14f2a665 | 229 | abort: |
ea63c2b9 | 230 | mutex_unlock(&data->update_lock); |
14f2a665 | 231 | return ret; |
ab2b79d5 HG |
232 | } |
233 | ||
14f2a665 GR |
234 | static ssize_t show_temp(struct device *dev, |
235 | struct device_attribute *devattr, char *buf) | |
ab2b79d5 | 236 | { |
14f2a665 GR |
237 | int nr = to_sensor_dev_attr_2(devattr)->nr; |
238 | int index = to_sensor_dev_attr_2(devattr)->index; | |
ab2b79d5 HG |
239 | struct tmp401_data *data = tmp401_update_device(dev); |
240 | ||
14f2a665 GR |
241 | if (IS_ERR(data)) |
242 | return PTR_ERR(data); | |
ab2b79d5 HG |
243 | |
244 | return sprintf(buf, "%d\n", | |
14f2a665 | 245 | tmp401_register_to_temp(data->temp[nr][index], data->config)); |
ab2b79d5 HG |
246 | } |
247 | ||
248 | static ssize_t show_temp_crit_hyst(struct device *dev, | |
249 | struct device_attribute *devattr, char *buf) | |
250 | { | |
251 | int temp, index = to_sensor_dev_attr(devattr)->index; | |
252 | struct tmp401_data *data = tmp401_update_device(dev); | |
253 | ||
14f2a665 GR |
254 | if (IS_ERR(data)) |
255 | return PTR_ERR(data); | |
256 | ||
ab2b79d5 | 257 | mutex_lock(&data->update_lock); |
14f2a665 | 258 | temp = tmp401_register_to_temp(data->temp[3][index], data->config); |
ab2b79d5 HG |
259 | temp -= data->temp_crit_hyst * 1000; |
260 | mutex_unlock(&data->update_lock); | |
261 | ||
262 | return sprintf(buf, "%d\n", temp); | |
263 | } | |
264 | ||
265 | static ssize_t show_status(struct device *dev, | |
266 | struct device_attribute *devattr, char *buf) | |
267 | { | |
268 | int mask = to_sensor_dev_attr(devattr)->index; | |
269 | struct tmp401_data *data = tmp401_update_device(dev); | |
270 | ||
14f2a665 GR |
271 | if (IS_ERR(data)) |
272 | return PTR_ERR(data); | |
ab2b79d5 | 273 | |
14f2a665 | 274 | return sprintf(buf, "%d\n", !!(data->status & mask)); |
ab2b79d5 HG |
275 | } |
276 | ||
14f2a665 GR |
277 | static ssize_t store_temp(struct device *dev, struct device_attribute *devattr, |
278 | const char *buf, size_t count) | |
ab2b79d5 | 279 | { |
14f2a665 GR |
280 | int nr = to_sensor_dev_attr_2(devattr)->nr; |
281 | int index = to_sensor_dev_attr_2(devattr)->index; | |
282 | struct i2c_client *client = to_i2c_client(dev); | |
ab2b79d5 HG |
283 | struct tmp401_data *data = tmp401_update_device(dev); |
284 | long val; | |
285 | u16 reg; | |
286 | ||
14f2a665 GR |
287 | if (IS_ERR(data)) |
288 | return PTR_ERR(data); | |
ab2b79d5 | 289 | |
179c4fdb | 290 | if (kstrtol(buf, 10, &val)) |
ab2b79d5 HG |
291 | return -EINVAL; |
292 | ||
14f2a665 | 293 | reg = tmp401_temp_to_register(val, data->config, nr == 3 ? 8 : 4); |
ab2b79d5 HG |
294 | |
295 | mutex_lock(&data->update_lock); | |
296 | ||
14f2a665 GR |
297 | i2c_smbus_write_byte_data(client, |
298 | TMP401_TEMP_MSB_WRITE[nr][index], | |
299 | reg >> 8); | |
300 | if (nr != 3) { | |
301 | i2c_smbus_write_byte_data(client, | |
302 | TMP401_TEMP_LSB[nr][index], | |
303 | reg & 0xFF); | |
304 | } | |
305 | data->temp[nr][index] = reg; | |
ab2b79d5 HG |
306 | |
307 | mutex_unlock(&data->update_lock); | |
308 | ||
309 | return count; | |
310 | } | |
311 | ||
312 | static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute | |
313 | *devattr, const char *buf, size_t count) | |
314 | { | |
315 | int temp, index = to_sensor_dev_attr(devattr)->index; | |
316 | struct tmp401_data *data = tmp401_update_device(dev); | |
317 | long val; | |
318 | u8 reg; | |
319 | ||
14f2a665 GR |
320 | if (IS_ERR(data)) |
321 | return PTR_ERR(data); | |
322 | ||
179c4fdb | 323 | if (kstrtol(buf, 10, &val)) |
ab2b79d5 HG |
324 | return -EINVAL; |
325 | ||
326 | if (data->config & TMP401_CONFIG_RANGE) | |
2a844c14 | 327 | val = clamp_val(val, -64000, 191000); |
ab2b79d5 | 328 | else |
2a844c14 | 329 | val = clamp_val(val, 0, 127000); |
ab2b79d5 HG |
330 | |
331 | mutex_lock(&data->update_lock); | |
14f2a665 | 332 | temp = tmp401_register_to_temp(data->temp[3][index], data->config); |
2a844c14 | 333 | val = clamp_val(val, temp - 255000, temp); |
ab2b79d5 HG |
334 | reg = ((temp - val) + 500) / 1000; |
335 | ||
14f2a665 GR |
336 | i2c_smbus_write_byte_data(to_i2c_client(dev), TMP401_TEMP_CRIT_HYST, |
337 | reg); | |
ab2b79d5 HG |
338 | |
339 | data->temp_crit_hyst = reg; | |
340 | ||
341 | mutex_unlock(&data->update_lock); | |
342 | ||
343 | return count; | |
344 | } | |
345 | ||
fce0758f AP |
346 | /* |
347 | * Resets the historical measurements of minimum and maximum temperatures. | |
348 | * This is done by writing any value to any of the minimum/maximum registers | |
349 | * (0x30-0x37). | |
350 | */ | |
351 | static ssize_t reset_temp_history(struct device *dev, | |
352 | struct device_attribute *devattr, const char *buf, size_t count) | |
353 | { | |
8eb6d90f GR |
354 | struct i2c_client *client = to_i2c_client(dev); |
355 | struct tmp401_data *data = i2c_get_clientdata(client); | |
fce0758f AP |
356 | long val; |
357 | ||
179c4fdb | 358 | if (kstrtol(buf, 10, &val)) |
fce0758f AP |
359 | return -EINVAL; |
360 | ||
361 | if (val != 1) { | |
b55f3757 GR |
362 | dev_err(dev, |
363 | "temp_reset_history value %ld not supported. Use 1 to reset the history!\n", | |
364 | val); | |
fce0758f AP |
365 | return -EINVAL; |
366 | } | |
8eb6d90f GR |
367 | mutex_lock(&data->update_lock); |
368 | i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val); | |
369 | data->valid = 0; | |
370 | mutex_unlock(&data->update_lock); | |
fce0758f AP |
371 | |
372 | return count; | |
373 | } | |
374 | ||
14f2a665 GR |
375 | static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0); |
376 | static SENSOR_DEVICE_ATTR_2(temp1_min, S_IWUSR | S_IRUGO, show_temp, | |
377 | store_temp, 1, 0); | |
378 | static SENSOR_DEVICE_ATTR_2(temp1_max, S_IWUSR | S_IRUGO, show_temp, | |
379 | store_temp, 2, 0); | |
380 | static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IWUSR | S_IRUGO, show_temp, | |
381 | store_temp, 3, 0); | |
b4e665c7 GR |
382 | static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, |
383 | show_temp_crit_hyst, store_temp_crit_hyst, 0); | |
384 | static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_status, NULL, | |
385 | TMP401_STATUS_LOCAL_LOW); | |
386 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_status, NULL, | |
387 | TMP401_STATUS_LOCAL_HIGH); | |
388 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_status, NULL, | |
389 | TMP401_STATUS_LOCAL_CRIT); | |
14f2a665 GR |
390 | static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0, 1); |
391 | static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp, | |
392 | store_temp, 1, 1); | |
393 | static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp, | |
394 | store_temp, 2, 1); | |
395 | static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IWUSR | S_IRUGO, show_temp, | |
396 | store_temp, 3, 1); | |
b4e665c7 GR |
397 | static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temp_crit_hyst, |
398 | NULL, 1); | |
399 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_status, NULL, | |
400 | TMP401_STATUS_REMOTE_OPEN); | |
401 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_status, NULL, | |
402 | TMP401_STATUS_REMOTE_LOW); | |
403 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_status, NULL, | |
404 | TMP401_STATUS_REMOTE_HIGH); | |
405 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_status, NULL, | |
406 | TMP401_STATUS_REMOTE_CRIT); | |
407 | ||
408 | static struct attribute *tmp401_attributes[] = { | |
409 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
410 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
411 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
412 | &sensor_dev_attr_temp1_crit.dev_attr.attr, | |
413 | &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, | |
414 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
415 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, | |
416 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
417 | ||
418 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
419 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
420 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
421 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
422 | &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, | |
423 | &sensor_dev_attr_temp2_fault.dev_attr.attr, | |
424 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
425 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, | |
426 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
427 | ||
428 | NULL | |
429 | }; | |
430 | ||
431 | static const struct attribute_group tmp401_group = { | |
432 | .attrs = tmp401_attributes, | |
ab2b79d5 HG |
433 | }; |
434 | ||
fce0758f AP |
435 | /* |
436 | * Additional features of the TMP411 chip. | |
437 | * The TMP411 stores the minimum and maximum | |
438 | * temperature measured since power-on, chip-reset, or | |
439 | * minimum and maximum register reset for both the local | |
440 | * and remote channels. | |
441 | */ | |
14f2a665 GR |
442 | static SENSOR_DEVICE_ATTR_2(temp1_lowest, S_IRUGO, show_temp, NULL, 4, 0); |
443 | static SENSOR_DEVICE_ATTR_2(temp1_highest, S_IRUGO, show_temp, NULL, 5, 0); | |
444 | static SENSOR_DEVICE_ATTR_2(temp2_lowest, S_IRUGO, show_temp, NULL, 4, 1); | |
445 | static SENSOR_DEVICE_ATTR_2(temp2_highest, S_IRUGO, show_temp, NULL, 5, 1); | |
b4e665c7 GR |
446 | static SENSOR_DEVICE_ATTR(temp_reset_history, S_IWUSR, NULL, reset_temp_history, |
447 | 0); | |
448 | ||
449 | static struct attribute *tmp411_attributes[] = { | |
450 | &sensor_dev_attr_temp1_highest.dev_attr.attr, | |
451 | &sensor_dev_attr_temp1_lowest.dev_attr.attr, | |
452 | &sensor_dev_attr_temp2_highest.dev_attr.attr, | |
453 | &sensor_dev_attr_temp2_lowest.dev_attr.attr, | |
454 | &sensor_dev_attr_temp_reset_history.dev_attr.attr, | |
455 | NULL | |
456 | }; | |
457 | ||
458 | static const struct attribute_group tmp411_group = { | |
459 | .attrs = tmp411_attributes, | |
fce0758f AP |
460 | }; |
461 | ||
ab2b79d5 HG |
462 | /* |
463 | * Begin non sysfs callback code (aka Real code) | |
464 | */ | |
465 | ||
466 | static void tmp401_init_client(struct i2c_client *client) | |
467 | { | |
468 | int config, config_orig; | |
469 | ||
470 | /* Set the conversion rate to 2 Hz */ | |
471 | i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, 5); | |
472 | ||
473 | /* Start conversions (disable shutdown if necessary) */ | |
474 | config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ); | |
475 | if (config < 0) { | |
476 | dev_warn(&client->dev, "Initialization failed!\n"); | |
477 | return; | |
478 | } | |
479 | ||
480 | config_orig = config; | |
481 | config &= ~TMP401_CONFIG_SHUTDOWN; | |
482 | ||
483 | if (config != config_orig) | |
484 | i2c_smbus_write_byte_data(client, TMP401_CONFIG_WRITE, config); | |
485 | } | |
486 | ||
310ec792 | 487 | static int tmp401_detect(struct i2c_client *client, |
ab2b79d5 HG |
488 | struct i2c_board_info *info) |
489 | { | |
dbe73c8f | 490 | enum chips kind; |
ab2b79d5 | 491 | struct i2c_adapter *adapter = client->adapter; |
dbe73c8f | 492 | u8 reg; |
ab2b79d5 HG |
493 | |
494 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
495 | return -ENODEV; | |
496 | ||
497 | /* Detect and identify the chip */ | |
dbe73c8f JD |
498 | reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG); |
499 | if (reg != TMP401_MANUFACTURER_ID) | |
500 | return -ENODEV; | |
ab2b79d5 | 501 | |
dbe73c8f | 502 | reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG); |
ab2b79d5 | 503 | |
dbe73c8f JD |
504 | switch (reg) { |
505 | case TMP401_DEVICE_ID: | |
a1fac92b GR |
506 | if (client->addr != 0x4c) |
507 | return -ENODEV; | |
dbe73c8f JD |
508 | kind = tmp401; |
509 | break; | |
4ce5b1fe GR |
510 | case TMP411A_DEVICE_ID: |
511 | if (client->addr != 0x4c) | |
512 | return -ENODEV; | |
513 | kind = tmp411; | |
514 | break; | |
515 | case TMP411B_DEVICE_ID: | |
516 | if (client->addr != 0x4d) | |
517 | return -ENODEV; | |
518 | kind = tmp411; | |
519 | break; | |
520 | case TMP411C_DEVICE_ID: | |
521 | if (client->addr != 0x4e) | |
522 | return -ENODEV; | |
dbe73c8f JD |
523 | kind = tmp411; |
524 | break; | |
a1fac92b GR |
525 | case TMP431_DEVICE_ID: |
526 | if (client->addr == 0x4e) | |
527 | return -ENODEV; | |
528 | kind = tmp431; | |
529 | break; | |
dbe73c8f JD |
530 | default: |
531 | return -ENODEV; | |
ab2b79d5 | 532 | } |
dbe73c8f JD |
533 | |
534 | reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ); | |
535 | if (reg & 0x1b) | |
536 | return -ENODEV; | |
537 | ||
538 | reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ); | |
539 | /* Datasheet says: 0x1-0x6 */ | |
540 | if (reg > 15) | |
541 | return -ENODEV; | |
542 | ||
dc71afe5 | 543 | strlcpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE); |
ab2b79d5 HG |
544 | |
545 | return 0; | |
546 | } | |
547 | ||
ea63c2b9 AP |
548 | static int tmp401_remove(struct i2c_client *client) |
549 | { | |
b4e665c7 | 550 | struct device *dev = &client->dev; |
ea63c2b9 | 551 | struct tmp401_data *data = i2c_get_clientdata(client); |
ea63c2b9 AP |
552 | |
553 | if (data->hwmon_dev) | |
554 | hwmon_device_unregister(data->hwmon_dev); | |
555 | ||
b4e665c7 | 556 | sysfs_remove_group(&dev->kobj, &tmp401_group); |
ea63c2b9 | 557 | |
b4e665c7 GR |
558 | if (data->kind == tmp411) |
559 | sysfs_remove_group(&dev->kobj, &tmp411_group); | |
ea63c2b9 | 560 | |
ea63c2b9 AP |
561 | return 0; |
562 | } | |
563 | ||
ab2b79d5 HG |
564 | static int tmp401_probe(struct i2c_client *client, |
565 | const struct i2c_device_id *id) | |
566 | { | |
b4e665c7 GR |
567 | struct device *dev = &client->dev; |
568 | int err; | |
ab2b79d5 | 569 | struct tmp401_data *data; |
a1fac92b | 570 | const char *names[] = { "TMP401", "TMP411", "TMP431" }; |
ab2b79d5 | 571 | |
b4e665c7 | 572 | data = devm_kzalloc(dev, sizeof(struct tmp401_data), GFP_KERNEL); |
ab2b79d5 HG |
573 | if (!data) |
574 | return -ENOMEM; | |
575 | ||
576 | i2c_set_clientdata(client, data); | |
577 | mutex_init(&data->update_lock); | |
fce0758f | 578 | data->kind = id->driver_data; |
ab2b79d5 HG |
579 | |
580 | /* Initialize the TMP401 chip */ | |
581 | tmp401_init_client(client); | |
582 | ||
583 | /* Register sysfs hooks */ | |
b4e665c7 GR |
584 | err = sysfs_create_group(&dev->kobj, &tmp401_group); |
585 | if (err) | |
586 | return err; | |
ab2b79d5 | 587 | |
a80581d0 | 588 | /* Register additional tmp411 sysfs hooks */ |
fce0758f | 589 | if (data->kind == tmp411) { |
b4e665c7 GR |
590 | err = sysfs_create_group(&dev->kobj, &tmp411_group); |
591 | if (err) | |
592 | goto exit_remove; | |
fce0758f AP |
593 | } |
594 | ||
b4e665c7 | 595 | data->hwmon_dev = hwmon_device_register(dev); |
ab2b79d5 HG |
596 | if (IS_ERR(data->hwmon_dev)) { |
597 | err = PTR_ERR(data->hwmon_dev); | |
598 | data->hwmon_dev = NULL; | |
599 | goto exit_remove; | |
600 | } | |
601 | ||
b4e665c7 | 602 | dev_info(dev, "Detected TI %s chip\n", names[data->kind]); |
ab2b79d5 HG |
603 | |
604 | return 0; | |
605 | ||
606 | exit_remove: | |
0df9fc7b | 607 | tmp401_remove(client); |
ab2b79d5 HG |
608 | return err; |
609 | } | |
610 | ||
ea63c2b9 AP |
611 | static struct i2c_driver tmp401_driver = { |
612 | .class = I2C_CLASS_HWMON, | |
613 | .driver = { | |
614 | .name = "tmp401", | |
615 | }, | |
616 | .probe = tmp401_probe, | |
617 | .remove = tmp401_remove, | |
618 | .id_table = tmp401_id, | |
619 | .detect = tmp401_detect, | |
620 | .address_list = normal_i2c, | |
621 | }; | |
ab2b79d5 | 622 | |
f0967eea | 623 | module_i2c_driver(tmp401_driver); |
ab2b79d5 HG |
624 | |
625 | MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); | |
626 | MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver"); | |
627 | MODULE_LICENSE("GPL"); |