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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * lm90.c - Part of lm_sensors, Linux kernel modules for hardware | |
3 | * monitoring | |
95238364 | 4 | * Copyright (C) 2003-2010 Jean Delvare <khali@linux-fr.org> |
1da177e4 LT |
5 | * |
6 | * Based on the lm83 driver. The LM90 is a sensor chip made by National | |
7 | * Semiconductor. It reports up to two temperatures (its own plus up to | |
8 | * one external one) with a 0.125 deg resolution (1 deg for local | |
a874a10c | 9 | * temperature) and a 3-4 deg accuracy. |
1da177e4 LT |
10 | * |
11 | * This driver also supports the LM89 and LM99, two other sensor chips | |
12 | * made by National Semiconductor. Both have an increased remote | |
13 | * temperature measurement accuracy (1 degree), and the LM99 | |
14 | * additionally shifts remote temperatures (measured and limits) by 16 | |
97ae60bb | 15 | * degrees, which allows for higher temperatures measurement. |
44bbe87e | 16 | * Note that there is no way to differentiate between both chips. |
97ae60bb | 17 | * When device is auto-detected, the driver will assume an LM99. |
1da177e4 LT |
18 | * |
19 | * This driver also supports the LM86, another sensor chip made by | |
20 | * National Semiconductor. It is exactly similar to the LM90 except it | |
21 | * has a higher accuracy. | |
1da177e4 LT |
22 | * |
23 | * This driver also supports the ADM1032, a sensor chip made by Analog | |
24 | * Devices. That chip is similar to the LM90, with a few differences | |
a874a10c JD |
25 | * that are not handled by this driver. Among others, it has a higher |
26 | * accuracy than the LM90, much like the LM86 does. | |
1da177e4 LT |
27 | * |
28 | * This driver also supports the MAX6657, MAX6658 and MAX6659 sensor | |
a874a10c | 29 | * chips made by Maxim. These chips are similar to the LM86. |
44bbe87e | 30 | * Note that there is no easy way to differentiate between the three |
1da177e4 | 31 | * variants. The extra address and features of the MAX6659 are not |
69f2f96d JD |
32 | * supported by this driver. These chips lack the remote temperature |
33 | * offset feature. | |
1da177e4 | 34 | * |
1a51e068 DW |
35 | * This driver also supports the MAX6646, MAX6647, MAX6648, MAX6649 and |
36 | * MAX6692 chips made by Maxim. These are again similar to the LM86, | |
37 | * but they use unsigned temperature values and can report temperatures | |
38 | * from 0 to 145 degrees. | |
271dabf5 | 39 | * |
32c82a93 RB |
40 | * This driver also supports the MAX6680 and MAX6681, two other sensor |
41 | * chips made by Maxim. These are quite similar to the other Maxim | |
a874a10c JD |
42 | * chips. The MAX6680 and MAX6681 only differ in the pinout so they can |
43 | * be treated identically. | |
32c82a93 | 44 | * |
23b2d477 NC |
45 | * This driver also supports the ADT7461 chip from Analog Devices. |
46 | * It's supported in both compatibility and extended mode. It is mostly | |
47 | * compatible with LM90 except for a data format difference for the | |
48 | * temperature value registers. | |
1da177e4 LT |
49 | * |
50 | * Since the LM90 was the first chipset supported by this driver, most | |
51 | * comments will refer to this chipset, but are actually general and | |
52 | * concern all supported chipsets, unless mentioned otherwise. | |
53 | * | |
54 | * This program is free software; you can redistribute it and/or modify | |
55 | * it under the terms of the GNU General Public License as published by | |
56 | * the Free Software Foundation; either version 2 of the License, or | |
57 | * (at your option) any later version. | |
58 | * | |
59 | * This program is distributed in the hope that it will be useful, | |
60 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
61 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
62 | * GNU General Public License for more details. | |
63 | * | |
64 | * You should have received a copy of the GNU General Public License | |
65 | * along with this program; if not, write to the Free Software | |
66 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
67 | */ | |
68 | ||
1da177e4 LT |
69 | #include <linux/module.h> |
70 | #include <linux/init.h> | |
71 | #include <linux/slab.h> | |
72 | #include <linux/jiffies.h> | |
73 | #include <linux/i2c.h> | |
10c08f81 | 74 | #include <linux/hwmon-sysfs.h> |
943b0830 MH |
75 | #include <linux/hwmon.h> |
76 | #include <linux/err.h> | |
9a61bf63 | 77 | #include <linux/mutex.h> |
0e39e01c | 78 | #include <linux/sysfs.h> |
1da177e4 LT |
79 | |
80 | /* | |
81 | * Addresses to scan | |
82 | * Address is fully defined internally and cannot be changed except for | |
32c82a93 | 83 | * MAX6659, MAX6680 and MAX6681. |
271dabf5 BH |
84 | * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, MAX6649, MAX6657 |
85 | * and MAX6658 have address 0x4c. | |
86 | * ADM1032-2, ADT7461-2, LM89-1, LM99-1 and MAX6646 have address 0x4d. | |
87 | * MAX6647 has address 0x4e. | |
1da177e4 | 88 | * MAX6659 can have address 0x4c, 0x4d or 0x4e (unsupported). |
32c82a93 RB |
89 | * MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, |
90 | * 0x4c, 0x4d or 0x4e. | |
1da177e4 LT |
91 | */ |
92 | ||
25e9c86d MH |
93 | static const unsigned short normal_i2c[] = { |
94 | 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END }; | |
1da177e4 | 95 | |
6771ea1f JD |
96 | enum chips { lm90, adm1032, lm99, lm86, max6657, adt7461, max6680, max6646, |
97 | w83l771 }; | |
1da177e4 LT |
98 | |
99 | /* | |
100 | * The LM90 registers | |
101 | */ | |
102 | ||
103 | #define LM90_REG_R_MAN_ID 0xFE | |
104 | #define LM90_REG_R_CHIP_ID 0xFF | |
105 | #define LM90_REG_R_CONFIG1 0x03 | |
106 | #define LM90_REG_W_CONFIG1 0x09 | |
107 | #define LM90_REG_R_CONFIG2 0xBF | |
108 | #define LM90_REG_W_CONFIG2 0xBF | |
109 | #define LM90_REG_R_CONVRATE 0x04 | |
110 | #define LM90_REG_W_CONVRATE 0x0A | |
111 | #define LM90_REG_R_STATUS 0x02 | |
112 | #define LM90_REG_R_LOCAL_TEMP 0x00 | |
113 | #define LM90_REG_R_LOCAL_HIGH 0x05 | |
114 | #define LM90_REG_W_LOCAL_HIGH 0x0B | |
115 | #define LM90_REG_R_LOCAL_LOW 0x06 | |
116 | #define LM90_REG_W_LOCAL_LOW 0x0C | |
117 | #define LM90_REG_R_LOCAL_CRIT 0x20 | |
118 | #define LM90_REG_W_LOCAL_CRIT 0x20 | |
119 | #define LM90_REG_R_REMOTE_TEMPH 0x01 | |
120 | #define LM90_REG_R_REMOTE_TEMPL 0x10 | |
121 | #define LM90_REG_R_REMOTE_OFFSH 0x11 | |
122 | #define LM90_REG_W_REMOTE_OFFSH 0x11 | |
123 | #define LM90_REG_R_REMOTE_OFFSL 0x12 | |
124 | #define LM90_REG_W_REMOTE_OFFSL 0x12 | |
125 | #define LM90_REG_R_REMOTE_HIGHH 0x07 | |
126 | #define LM90_REG_W_REMOTE_HIGHH 0x0D | |
127 | #define LM90_REG_R_REMOTE_HIGHL 0x13 | |
128 | #define LM90_REG_W_REMOTE_HIGHL 0x13 | |
129 | #define LM90_REG_R_REMOTE_LOWH 0x08 | |
130 | #define LM90_REG_W_REMOTE_LOWH 0x0E | |
131 | #define LM90_REG_R_REMOTE_LOWL 0x14 | |
132 | #define LM90_REG_W_REMOTE_LOWL 0x14 | |
133 | #define LM90_REG_R_REMOTE_CRIT 0x19 | |
134 | #define LM90_REG_W_REMOTE_CRIT 0x19 | |
135 | #define LM90_REG_R_TCRIT_HYST 0x21 | |
136 | #define LM90_REG_W_TCRIT_HYST 0x21 | |
137 | ||
271dabf5 | 138 | /* MAX6646/6647/6649/6657/6658/6659 registers */ |
f65e1708 JD |
139 | |
140 | #define MAX6657_REG_R_LOCAL_TEMPL 0x11 | |
141 | ||
23b2d477 NC |
142 | /* |
143 | * Device flags | |
144 | */ | |
145 | #define LM90_FLAG_ADT7461_EXT 0x01 /* ADT7461 extended mode */ | |
146 | ||
1da177e4 LT |
147 | /* |
148 | * Functions declaration | |
149 | */ | |
150 | ||
310ec792 | 151 | static int lm90_detect(struct i2c_client *client, struct i2c_board_info *info); |
9b0e8526 JD |
152 | static int lm90_probe(struct i2c_client *client, |
153 | const struct i2c_device_id *id); | |
1da177e4 | 154 | static void lm90_init_client(struct i2c_client *client); |
9b0e8526 | 155 | static int lm90_remove(struct i2c_client *client); |
1da177e4 LT |
156 | static struct lm90_data *lm90_update_device(struct device *dev); |
157 | ||
158 | /* | |
159 | * Driver data (common to all clients) | |
160 | */ | |
161 | ||
9b0e8526 JD |
162 | static const struct i2c_device_id lm90_id[] = { |
163 | { "adm1032", adm1032 }, | |
164 | { "adt7461", adt7461 }, | |
165 | { "lm90", lm90 }, | |
166 | { "lm86", lm86 }, | |
97ae60bb JD |
167 | { "lm89", lm86 }, |
168 | { "lm99", lm99 }, | |
271dabf5 BH |
169 | { "max6646", max6646 }, |
170 | { "max6647", max6646 }, | |
171 | { "max6649", max6646 }, | |
9b0e8526 JD |
172 | { "max6657", max6657 }, |
173 | { "max6658", max6657 }, | |
174 | { "max6659", max6657 }, | |
175 | { "max6680", max6680 }, | |
176 | { "max6681", max6680 }, | |
6771ea1f | 177 | { "w83l771", w83l771 }, |
9b0e8526 JD |
178 | { } |
179 | }; | |
180 | MODULE_DEVICE_TABLE(i2c, lm90_id); | |
181 | ||
1da177e4 | 182 | static struct i2c_driver lm90_driver = { |
9b0e8526 | 183 | .class = I2C_CLASS_HWMON, |
cdaf7934 | 184 | .driver = { |
cdaf7934 LR |
185 | .name = "lm90", |
186 | }, | |
9b0e8526 JD |
187 | .probe = lm90_probe, |
188 | .remove = lm90_remove, | |
189 | .id_table = lm90_id, | |
190 | .detect = lm90_detect, | |
c3813d6a | 191 | .address_list = normal_i2c, |
1da177e4 LT |
192 | }; |
193 | ||
194 | /* | |
195 | * Client data (each client gets its own) | |
196 | */ | |
197 | ||
198 | struct lm90_data { | |
1beeffe4 | 199 | struct device *hwmon_dev; |
9a61bf63 | 200 | struct mutex update_lock; |
1da177e4 LT |
201 | char valid; /* zero until following fields are valid */ |
202 | unsigned long last_updated; /* in jiffies */ | |
203 | int kind; | |
23b2d477 | 204 | int flags; |
1da177e4 | 205 | |
95238364 JD |
206 | u8 config_orig; /* Original configuration register value */ |
207 | ||
1da177e4 | 208 | /* registers values */ |
f65e1708 JD |
209 | s8 temp8[4]; /* 0: local low limit |
210 | 1: local high limit | |
211 | 2: local critical limit | |
212 | 3: remote critical limit */ | |
213 | s16 temp11[5]; /* 0: remote input | |
30d7394b | 214 | 1: remote low limit |
69f2f96d | 215 | 2: remote high limit |
271dabf5 | 216 | 3: remote offset (except max6646 and max6657) |
f65e1708 | 217 | 4: local input */ |
1da177e4 LT |
218 | u8 temp_hyst; |
219 | u8 alarms; /* bitvector */ | |
220 | }; | |
221 | ||
cea50fe2 NC |
222 | /* |
223 | * Conversions | |
224 | * For local temperatures and limits, critical limits and the hysteresis | |
225 | * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius. | |
226 | * For remote temperatures and limits, it uses signed 11-bit values with | |
271dabf5 BH |
227 | * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some |
228 | * Maxim chips use unsigned values. | |
cea50fe2 NC |
229 | */ |
230 | ||
9d4d3834 | 231 | static inline int temp_from_s8(s8 val) |
cea50fe2 NC |
232 | { |
233 | return val * 1000; | |
234 | } | |
235 | ||
271dabf5 BH |
236 | static inline int temp_from_u8(u8 val) |
237 | { | |
238 | return val * 1000; | |
239 | } | |
240 | ||
9d4d3834 | 241 | static inline int temp_from_s16(s16 val) |
cea50fe2 NC |
242 | { |
243 | return val / 32 * 125; | |
244 | } | |
245 | ||
271dabf5 BH |
246 | static inline int temp_from_u16(u16 val) |
247 | { | |
248 | return val / 32 * 125; | |
249 | } | |
250 | ||
9d4d3834 | 251 | static s8 temp_to_s8(long val) |
cea50fe2 NC |
252 | { |
253 | if (val <= -128000) | |
254 | return -128; | |
255 | if (val >= 127000) | |
256 | return 127; | |
257 | if (val < 0) | |
258 | return (val - 500) / 1000; | |
259 | return (val + 500) / 1000; | |
260 | } | |
261 | ||
271dabf5 BH |
262 | static u8 temp_to_u8(long val) |
263 | { | |
264 | if (val <= 0) | |
265 | return 0; | |
266 | if (val >= 255000) | |
267 | return 255; | |
268 | return (val + 500) / 1000; | |
269 | } | |
270 | ||
9d4d3834 | 271 | static s16 temp_to_s16(long val) |
cea50fe2 NC |
272 | { |
273 | if (val <= -128000) | |
274 | return 0x8000; | |
275 | if (val >= 127875) | |
276 | return 0x7FE0; | |
277 | if (val < 0) | |
278 | return (val - 62) / 125 * 32; | |
279 | return (val + 62) / 125 * 32; | |
280 | } | |
281 | ||
282 | static u8 hyst_to_reg(long val) | |
283 | { | |
284 | if (val <= 0) | |
285 | return 0; | |
286 | if (val >= 30500) | |
287 | return 31; | |
288 | return (val + 500) / 1000; | |
289 | } | |
290 | ||
291 | /* | |
23b2d477 NC |
292 | * ADT7461 in compatibility mode is almost identical to LM90 except that |
293 | * attempts to write values that are outside the range 0 < temp < 127 are | |
294 | * treated as the boundary value. | |
295 | * | |
296 | * ADT7461 in "extended mode" operation uses unsigned integers offset by | |
297 | * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC. | |
cea50fe2 | 298 | */ |
9d4d3834 | 299 | static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val) |
cea50fe2 | 300 | { |
23b2d477 NC |
301 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
302 | return (val - 64) * 1000; | |
303 | else | |
9d4d3834 | 304 | return temp_from_s8(val); |
cea50fe2 NC |
305 | } |
306 | ||
9d4d3834 | 307 | static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val) |
cea50fe2 | 308 | { |
23b2d477 NC |
309 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
310 | return (val - 0x4000) / 64 * 250; | |
311 | else | |
9d4d3834 | 312 | return temp_from_s16(val); |
23b2d477 NC |
313 | } |
314 | ||
9d4d3834 | 315 | static u8 temp_to_u8_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
316 | { |
317 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
318 | if (val <= -64000) | |
319 | return 0; | |
320 | if (val >= 191000) | |
321 | return 0xFF; | |
322 | return (val + 500 + 64000) / 1000; | |
323 | } else { | |
324 | if (val <= 0) | |
325 | return 0; | |
326 | if (val >= 127000) | |
327 | return 127; | |
328 | return (val + 500) / 1000; | |
329 | } | |
330 | } | |
331 | ||
9d4d3834 | 332 | static u16 temp_to_u16_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
333 | { |
334 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
335 | if (val <= -64000) | |
336 | return 0; | |
337 | if (val >= 191750) | |
338 | return 0xFFC0; | |
339 | return (val + 64000 + 125) / 250 * 64; | |
340 | } else { | |
341 | if (val <= 0) | |
342 | return 0; | |
343 | if (val >= 127750) | |
344 | return 0x7FC0; | |
345 | return (val + 125) / 250 * 64; | |
346 | } | |
cea50fe2 NC |
347 | } |
348 | ||
1da177e4 LT |
349 | /* |
350 | * Sysfs stuff | |
351 | */ | |
352 | ||
30d7394b JD |
353 | static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr, |
354 | char *buf) | |
355 | { | |
356 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
357 | struct lm90_data *data = lm90_update_device(dev); | |
23b2d477 NC |
358 | int temp; |
359 | ||
360 | if (data->kind == adt7461) | |
9d4d3834 | 361 | temp = temp_from_u8_adt7461(data, data->temp8[attr->index]); |
271dabf5 BH |
362 | else if (data->kind == max6646) |
363 | temp = temp_from_u8(data->temp8[attr->index]); | |
23b2d477 | 364 | else |
9d4d3834 | 365 | temp = temp_from_s8(data->temp8[attr->index]); |
23b2d477 | 366 | |
97ae60bb JD |
367 | /* +16 degrees offset for temp2 for the LM99 */ |
368 | if (data->kind == lm99 && attr->index == 3) | |
369 | temp += 16000; | |
370 | ||
23b2d477 | 371 | return sprintf(buf, "%d\n", temp); |
30d7394b JD |
372 | } |
373 | ||
374 | static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, | |
375 | const char *buf, size_t count) | |
376 | { | |
377 | static const u8 reg[4] = { | |
378 | LM90_REG_W_LOCAL_LOW, | |
379 | LM90_REG_W_LOCAL_HIGH, | |
380 | LM90_REG_W_LOCAL_CRIT, | |
381 | LM90_REG_W_REMOTE_CRIT, | |
382 | }; | |
383 | ||
384 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
385 | struct i2c_client *client = to_i2c_client(dev); | |
386 | struct lm90_data *data = i2c_get_clientdata(client); | |
387 | long val = simple_strtol(buf, NULL, 10); | |
388 | int nr = attr->index; | |
389 | ||
97ae60bb JD |
390 | /* +16 degrees offset for temp2 for the LM99 */ |
391 | if (data->kind == lm99 && attr->index == 3) | |
392 | val -= 16000; | |
393 | ||
9a61bf63 | 394 | mutex_lock(&data->update_lock); |
30d7394b | 395 | if (data->kind == adt7461) |
9d4d3834 | 396 | data->temp8[nr] = temp_to_u8_adt7461(data, val); |
271dabf5 BH |
397 | else if (data->kind == max6646) |
398 | data->temp8[nr] = temp_to_u8(val); | |
30d7394b | 399 | else |
9d4d3834 | 400 | data->temp8[nr] = temp_to_s8(val); |
f65e1708 | 401 | i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]); |
9a61bf63 | 402 | mutex_unlock(&data->update_lock); |
30d7394b | 403 | return count; |
1da177e4 | 404 | } |
30d7394b JD |
405 | |
406 | static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, | |
407 | char *buf) | |
408 | { | |
409 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
410 | struct lm90_data *data = lm90_update_device(dev); | |
23b2d477 NC |
411 | int temp; |
412 | ||
413 | if (data->kind == adt7461) | |
9d4d3834 | 414 | temp = temp_from_u16_adt7461(data, data->temp11[attr->index]); |
271dabf5 BH |
415 | else if (data->kind == max6646) |
416 | temp = temp_from_u16(data->temp11[attr->index]); | |
23b2d477 | 417 | else |
9d4d3834 | 418 | temp = temp_from_s16(data->temp11[attr->index]); |
23b2d477 | 419 | |
97ae60bb JD |
420 | /* +16 degrees offset for temp2 for the LM99 */ |
421 | if (data->kind == lm99 && attr->index <= 2) | |
422 | temp += 16000; | |
423 | ||
23b2d477 | 424 | return sprintf(buf, "%d\n", temp); |
1da177e4 | 425 | } |
30d7394b JD |
426 | |
427 | static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, | |
428 | const char *buf, size_t count) | |
429 | { | |
69f2f96d | 430 | static const u8 reg[6] = { |
30d7394b JD |
431 | LM90_REG_W_REMOTE_LOWH, |
432 | LM90_REG_W_REMOTE_LOWL, | |
433 | LM90_REG_W_REMOTE_HIGHH, | |
434 | LM90_REG_W_REMOTE_HIGHL, | |
69f2f96d JD |
435 | LM90_REG_W_REMOTE_OFFSH, |
436 | LM90_REG_W_REMOTE_OFFSL, | |
30d7394b JD |
437 | }; |
438 | ||
439 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
440 | struct i2c_client *client = to_i2c_client(dev); | |
441 | struct lm90_data *data = i2c_get_clientdata(client); | |
442 | long val = simple_strtol(buf, NULL, 10); | |
443 | int nr = attr->index; | |
444 | ||
97ae60bb JD |
445 | /* +16 degrees offset for temp2 for the LM99 */ |
446 | if (data->kind == lm99 && attr->index <= 2) | |
447 | val -= 16000; | |
448 | ||
9a61bf63 | 449 | mutex_lock(&data->update_lock); |
30d7394b | 450 | if (data->kind == adt7461) |
9d4d3834 | 451 | data->temp11[nr] = temp_to_u16_adt7461(data, val); |
5f502a83 | 452 | else if (data->kind == max6657 || data->kind == max6680) |
9d4d3834 | 453 | data->temp11[nr] = temp_to_s8(val) << 8; |
271dabf5 BH |
454 | else if (data->kind == max6646) |
455 | data->temp11[nr] = temp_to_u8(val) << 8; | |
30d7394b | 456 | else |
9d4d3834 | 457 | data->temp11[nr] = temp_to_s16(val); |
5f502a83 | 458 | |
30d7394b JD |
459 | i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], |
460 | data->temp11[nr] >> 8); | |
271dabf5 BH |
461 | if (data->kind != max6657 && data->kind != max6680 |
462 | && data->kind != max6646) | |
5f502a83 JD |
463 | i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], |
464 | data->temp11[nr] & 0xff); | |
9a61bf63 | 465 | mutex_unlock(&data->update_lock); |
30d7394b | 466 | return count; |
1da177e4 | 467 | } |
30d7394b JD |
468 | |
469 | static ssize_t show_temphyst(struct device *dev, struct device_attribute *devattr, | |
470 | char *buf) | |
471 | { | |
472 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
473 | struct lm90_data *data = lm90_update_device(dev); | |
23b2d477 NC |
474 | int temp; |
475 | ||
476 | if (data->kind == adt7461) | |
9d4d3834 | 477 | temp = temp_from_u8_adt7461(data, data->temp8[attr->index]); |
ec38fa2b JD |
478 | else if (data->kind == max6646) |
479 | temp = temp_from_u8(data->temp8[attr->index]); | |
23b2d477 | 480 | else |
9d4d3834 | 481 | temp = temp_from_s8(data->temp8[attr->index]); |
23b2d477 | 482 | |
97ae60bb JD |
483 | /* +16 degrees offset for temp2 for the LM99 */ |
484 | if (data->kind == lm99 && attr->index == 3) | |
485 | temp += 16000; | |
486 | ||
9d4d3834 | 487 | return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst)); |
1da177e4 | 488 | } |
1da177e4 | 489 | |
30d7394b JD |
490 | static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy, |
491 | const char *buf, size_t count) | |
1da177e4 LT |
492 | { |
493 | struct i2c_client *client = to_i2c_client(dev); | |
494 | struct lm90_data *data = i2c_get_clientdata(client); | |
495 | long val = simple_strtol(buf, NULL, 10); | |
ec38fa2b | 496 | int temp; |
1da177e4 | 497 | |
9a61bf63 | 498 | mutex_lock(&data->update_lock); |
ec38fa2b JD |
499 | if (data->kind == adt7461) |
500 | temp = temp_from_u8_adt7461(data, data->temp8[2]); | |
501 | else if (data->kind == max6646) | |
502 | temp = temp_from_u8(data->temp8[2]); | |
503 | else | |
504 | temp = temp_from_s8(data->temp8[2]); | |
505 | ||
506 | data->temp_hyst = hyst_to_reg(temp - val); | |
1da177e4 | 507 | i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST, |
ec38fa2b | 508 | data->temp_hyst); |
9a61bf63 | 509 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
510 | return count; |
511 | } | |
512 | ||
30d7394b JD |
513 | static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, |
514 | char *buf) | |
1da177e4 LT |
515 | { |
516 | struct lm90_data *data = lm90_update_device(dev); | |
517 | return sprintf(buf, "%d\n", data->alarms); | |
518 | } | |
519 | ||
2d45771e JD |
520 | static ssize_t show_alarm(struct device *dev, struct device_attribute |
521 | *devattr, char *buf) | |
522 | { | |
523 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
524 | struct lm90_data *data = lm90_update_device(dev); | |
525 | int bitnr = attr->index; | |
526 | ||
527 | return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1); | |
528 | } | |
529 | ||
f65e1708 | 530 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp11, NULL, 4); |
30d7394b JD |
531 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); |
532 | static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8, | |
f65e1708 | 533 | set_temp8, 0); |
30d7394b JD |
534 | static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, |
535 | set_temp11, 1); | |
536 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8, | |
f65e1708 | 537 | set_temp8, 1); |
30d7394b JD |
538 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, |
539 | set_temp11, 2); | |
540 | static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8, | |
f65e1708 | 541 | set_temp8, 2); |
30d7394b | 542 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8, |
f65e1708 | 543 | set_temp8, 3); |
30d7394b | 544 | static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst, |
f65e1708 JD |
545 | set_temphyst, 2); |
546 | static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, 3); | |
69f2f96d JD |
547 | static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, |
548 | set_temp11, 3); | |
2d45771e JD |
549 | |
550 | /* Individual alarm files */ | |
551 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0); | |
552 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); | |
7817a39e | 553 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); |
2d45771e JD |
554 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); |
555 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); | |
556 | static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5); | |
557 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); | |
558 | /* Raw alarm file for compatibility */ | |
1da177e4 LT |
559 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
560 | ||
0e39e01c JD |
561 | static struct attribute *lm90_attributes[] = { |
562 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
563 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
564 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
565 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
566 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
567 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
568 | &sensor_dev_attr_temp1_crit.dev_attr.attr, | |
569 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
570 | &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, | |
571 | &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, | |
572 | ||
573 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
574 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
7817a39e | 575 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
0e39e01c JD |
576 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
577 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
578 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, | |
579 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
580 | &dev_attr_alarms.attr, | |
581 | NULL | |
582 | }; | |
583 | ||
584 | static const struct attribute_group lm90_group = { | |
585 | .attrs = lm90_attributes, | |
586 | }; | |
587 | ||
c3df5806 JD |
588 | /* pec used for ADM1032 only */ |
589 | static ssize_t show_pec(struct device *dev, struct device_attribute *dummy, | |
590 | char *buf) | |
591 | { | |
592 | struct i2c_client *client = to_i2c_client(dev); | |
593 | return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC)); | |
594 | } | |
595 | ||
596 | static ssize_t set_pec(struct device *dev, struct device_attribute *dummy, | |
597 | const char *buf, size_t count) | |
598 | { | |
599 | struct i2c_client *client = to_i2c_client(dev); | |
600 | long val = simple_strtol(buf, NULL, 10); | |
601 | ||
602 | switch (val) { | |
603 | case 0: | |
604 | client->flags &= ~I2C_CLIENT_PEC; | |
605 | break; | |
606 | case 1: | |
607 | client->flags |= I2C_CLIENT_PEC; | |
608 | break; | |
609 | default: | |
610 | return -EINVAL; | |
611 | } | |
612 | ||
613 | return count; | |
614 | } | |
615 | ||
616 | static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec); | |
617 | ||
1da177e4 LT |
618 | /* |
619 | * Real code | |
620 | */ | |
621 | ||
c3df5806 | 622 | /* The ADM1032 supports PEC but not on write byte transactions, so we need |
0966415d | 623 | to explicitly ask for a transaction without PEC. */ |
c3df5806 JD |
624 | static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value) |
625 | { | |
626 | return i2c_smbus_xfer(client->adapter, client->addr, | |
627 | client->flags & ~I2C_CLIENT_PEC, | |
628 | I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL); | |
629 | } | |
630 | ||
631 | /* It is assumed that client->update_lock is held (unless we are in | |
632 | detection or initialization steps). This matters when PEC is enabled, | |
633 | because we don't want the address pointer to change between the write | |
634 | byte and the read byte transactions. */ | |
8256fe0f JD |
635 | static int lm90_read_reg(struct i2c_client* client, u8 reg, u8 *value) |
636 | { | |
637 | int err; | |
638 | ||
c3df5806 JD |
639 | if (client->flags & I2C_CLIENT_PEC) { |
640 | err = adm1032_write_byte(client, reg); | |
641 | if (err >= 0) | |
642 | err = i2c_smbus_read_byte(client); | |
643 | } else | |
644 | err = i2c_smbus_read_byte_data(client, reg); | |
8256fe0f JD |
645 | |
646 | if (err < 0) { | |
647 | dev_warn(&client->dev, "Register %#02x read failed (%d)\n", | |
648 | reg, err); | |
649 | return err; | |
650 | } | |
651 | *value = err; | |
652 | ||
653 | return 0; | |
654 | } | |
655 | ||
9b0e8526 | 656 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 657 | static int lm90_detect(struct i2c_client *new_client, |
9b0e8526 | 658 | struct i2c_board_info *info) |
1da177e4 | 659 | { |
9b0e8526 JD |
660 | struct i2c_adapter *adapter = new_client->adapter; |
661 | int address = new_client->addr; | |
8f2fa77c JD |
662 | const char *name = NULL; |
663 | int man_id, chip_id, reg_config1, reg_convrate; | |
1da177e4 LT |
664 | |
665 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
9b0e8526 | 666 | return -ENODEV; |
1da177e4 | 667 | |
8f2fa77c JD |
668 | /* detection and identification */ |
669 | if ((man_id = i2c_smbus_read_byte_data(new_client, | |
e0ae87a4 | 670 | LM90_REG_R_MAN_ID)) < 0 |
8f2fa77c | 671 | || (chip_id = i2c_smbus_read_byte_data(new_client, |
e0ae87a4 | 672 | LM90_REG_R_CHIP_ID)) < 0 |
8f2fa77c | 673 | || (reg_config1 = i2c_smbus_read_byte_data(new_client, |
e0ae87a4 | 674 | LM90_REG_R_CONFIG1)) < 0 |
8f2fa77c | 675 | || (reg_convrate = i2c_smbus_read_byte_data(new_client, |
e0ae87a4 | 676 | LM90_REG_R_CONVRATE)) < 0) |
8f2fa77c JD |
677 | return -ENODEV; |
678 | ||
679 | if ((address == 0x4C || address == 0x4D) | |
680 | && man_id == 0x01) { /* National Semiconductor */ | |
681 | int reg_config2; | |
682 | ||
683 | reg_config2 = i2c_smbus_read_byte_data(new_client, | |
684 | LM90_REG_R_CONFIG2); | |
685 | if (reg_config2 < 0) | |
9b0e8526 | 686 | return -ENODEV; |
8f2fa77c JD |
687 | |
688 | if ((reg_config1 & 0x2A) == 0x00 | |
689 | && (reg_config2 & 0xF8) == 0x00 | |
690 | && reg_convrate <= 0x09) { | |
691 | if (address == 0x4C | |
692 | && (chip_id & 0xF0) == 0x20) { /* LM90 */ | |
693 | name = "lm90"; | |
32c82a93 | 694 | } else |
8f2fa77c JD |
695 | if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */ |
696 | name = "lm99"; | |
697 | dev_info(&adapter->dev, | |
698 | "Assuming LM99 chip at 0x%02x\n", | |
699 | address); | |
700 | dev_info(&adapter->dev, | |
701 | "If it is an LM89, instantiate it " | |
702 | "with the new_device sysfs " | |
703 | "interface\n"); | |
271dabf5 | 704 | } else |
8f2fa77c JD |
705 | if (address == 0x4C |
706 | && (chip_id & 0xF0) == 0x10) { /* LM86 */ | |
707 | name = "lm86"; | |
1da177e4 LT |
708 | } |
709 | } | |
8f2fa77c JD |
710 | } else |
711 | if ((address == 0x4C || address == 0x4D) | |
712 | && man_id == 0x41) { /* Analog Devices */ | |
713 | if ((chip_id & 0xF0) == 0x40 /* ADM1032 */ | |
714 | && (reg_config1 & 0x3F) == 0x00 | |
715 | && reg_convrate <= 0x0A) { | |
716 | name = "adm1032"; | |
717 | /* The ADM1032 supports PEC, but only if combined | |
718 | transactions are not used. */ | |
719 | if (i2c_check_functionality(adapter, | |
720 | I2C_FUNC_SMBUS_BYTE)) | |
721 | info->flags |= I2C_CLIENT_PEC; | |
722 | } else | |
723 | if (chip_id == 0x51 /* ADT7461 */ | |
724 | && (reg_config1 & 0x1B) == 0x00 | |
725 | && reg_convrate <= 0x0A) { | |
726 | name = "adt7461"; | |
727 | } | |
728 | } else | |
729 | if (man_id == 0x4D) { /* Maxim */ | |
730 | /* | |
731 | * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id | |
732 | * register. Reading from that address will return the last | |
733 | * read value, which in our case is those of the man_id | |
734 | * register. Likewise, the config1 register seems to lack a | |
735 | * low nibble, so the value will be those of the previous | |
736 | * read, so in our case those of the man_id register. | |
737 | */ | |
738 | if (chip_id == man_id | |
739 | && (address == 0x4C || address == 0x4D) | |
740 | && (reg_config1 & 0x1F) == (man_id & 0x0F) | |
741 | && reg_convrate <= 0x09) { | |
742 | name = "max6657"; | |
743 | } else | |
744 | /* | |
745 | * The chip_id register of the MAX6680 and MAX6681 holds the | |
746 | * revision of the chip. The lowest bit of the config1 register | |
747 | * is unused and should return zero when read, so should the | |
748 | * second to last bit of config1 (software reset). | |
749 | */ | |
750 | if (chip_id == 0x01 | |
751 | && (reg_config1 & 0x03) == 0x00 | |
752 | && reg_convrate <= 0x07) { | |
753 | name = "max6680"; | |
754 | } else | |
755 | /* | |
756 | * The chip_id register of the MAX6646/6647/6649 holds the | |
757 | * revision of the chip. The lowest 6 bits of the config1 | |
758 | * register are unused and should return zero when read. | |
759 | */ | |
760 | if (chip_id == 0x59 | |
761 | && (reg_config1 & 0x3f) == 0x00 | |
762 | && reg_convrate <= 0x07) { | |
763 | name = "max6646"; | |
1da177e4 | 764 | } |
6771ea1f JD |
765 | } else |
766 | if (address == 0x4C | |
767 | && man_id == 0x5C) { /* Winbond/Nuvoton */ | |
768 | if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */ | |
769 | && (reg_config1 & 0x2A) == 0x00 | |
770 | && reg_convrate <= 0x08) { | |
771 | name = "w83l771"; | |
772 | } | |
1da177e4 LT |
773 | } |
774 | ||
8f2fa77c JD |
775 | if (!name) { /* identification failed */ |
776 | dev_dbg(&adapter->dev, | |
777 | "Unsupported chip at 0x%02x (man_id=0x%02X, " | |
778 | "chip_id=0x%02X)\n", address, man_id, chip_id); | |
779 | return -ENODEV; | |
1da177e4 | 780 | } |
8f2fa77c | 781 | |
9b0e8526 JD |
782 | strlcpy(info->type, name, I2C_NAME_SIZE); |
783 | ||
784 | return 0; | |
785 | } | |
786 | ||
787 | static int lm90_probe(struct i2c_client *new_client, | |
788 | const struct i2c_device_id *id) | |
789 | { | |
790 | struct i2c_adapter *adapter = to_i2c_adapter(new_client->dev.parent); | |
791 | struct lm90_data *data; | |
792 | int err; | |
1da177e4 | 793 | |
9b0e8526 JD |
794 | data = kzalloc(sizeof(struct lm90_data), GFP_KERNEL); |
795 | if (!data) { | |
796 | err = -ENOMEM; | |
797 | goto exit; | |
798 | } | |
799 | i2c_set_clientdata(new_client, data); | |
9a61bf63 | 800 | mutex_init(&data->update_lock); |
1da177e4 | 801 | |
9b0e8526 JD |
802 | /* Set the device type */ |
803 | data->kind = id->driver_data; | |
804 | if (data->kind == adm1032) { | |
805 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) | |
806 | new_client->flags &= ~I2C_CLIENT_PEC; | |
807 | } | |
1da177e4 LT |
808 | |
809 | /* Initialize the LM90 chip */ | |
810 | lm90_init_client(new_client); | |
811 | ||
812 | /* Register sysfs hooks */ | |
0e39e01c | 813 | if ((err = sysfs_create_group(&new_client->dev.kobj, &lm90_group))) |
9b0e8526 | 814 | goto exit_free; |
0e39e01c JD |
815 | if (new_client->flags & I2C_CLIENT_PEC) { |
816 | if ((err = device_create_file(&new_client->dev, | |
817 | &dev_attr_pec))) | |
818 | goto exit_remove_files; | |
819 | } | |
271dabf5 | 820 | if (data->kind != max6657 && data->kind != max6646) { |
69f2f96d JD |
821 | if ((err = device_create_file(&new_client->dev, |
822 | &sensor_dev_attr_temp2_offset.dev_attr))) | |
823 | goto exit_remove_files; | |
824 | } | |
0e39e01c | 825 | |
1beeffe4 TJ |
826 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
827 | if (IS_ERR(data->hwmon_dev)) { | |
828 | err = PTR_ERR(data->hwmon_dev); | |
0e39e01c | 829 | goto exit_remove_files; |
943b0830 MH |
830 | } |
831 | ||
1da177e4 LT |
832 | return 0; |
833 | ||
0e39e01c JD |
834 | exit_remove_files: |
835 | sysfs_remove_group(&new_client->dev.kobj, &lm90_group); | |
836 | device_remove_file(&new_client->dev, &dev_attr_pec); | |
1da177e4 LT |
837 | exit_free: |
838 | kfree(data); | |
839 | exit: | |
840 | return err; | |
841 | } | |
842 | ||
843 | static void lm90_init_client(struct i2c_client *client) | |
844 | { | |
95238364 | 845 | u8 config; |
32c82a93 | 846 | struct lm90_data *data = i2c_get_clientdata(client); |
1da177e4 LT |
847 | |
848 | /* | |
849 | * Start the conversions. | |
850 | */ | |
851 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, | |
852 | 5); /* 2 Hz */ | |
8256fe0f JD |
853 | if (lm90_read_reg(client, LM90_REG_R_CONFIG1, &config) < 0) { |
854 | dev_warn(&client->dev, "Initialization failed!\n"); | |
855 | return; | |
856 | } | |
95238364 | 857 | data->config_orig = config; |
32c82a93 | 858 | |
23b2d477 NC |
859 | /* Check Temperature Range Select */ |
860 | if (data->kind == adt7461) { | |
861 | if (config & 0x04) | |
862 | data->flags |= LM90_FLAG_ADT7461_EXT; | |
863 | } | |
864 | ||
32c82a93 RB |
865 | /* |
866 | * Put MAX6680/MAX8881 into extended resolution (bit 0x10, | |
867 | * 0.125 degree resolution) and range (0x08, extend range | |
868 | * to -64 degree) mode for the remote temperature sensor. | |
869 | */ | |
870 | if (data->kind == max6680) { | |
871 | config |= 0x18; | |
872 | } | |
873 | ||
874 | config &= 0xBF; /* run */ | |
95238364 | 875 | if (config != data->config_orig) /* Only write if changed */ |
32c82a93 | 876 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config); |
1da177e4 LT |
877 | } |
878 | ||
9b0e8526 | 879 | static int lm90_remove(struct i2c_client *client) |
1da177e4 | 880 | { |
943b0830 | 881 | struct lm90_data *data = i2c_get_clientdata(client); |
1da177e4 | 882 | |
1beeffe4 | 883 | hwmon_device_unregister(data->hwmon_dev); |
0e39e01c JD |
884 | sysfs_remove_group(&client->dev.kobj, &lm90_group); |
885 | device_remove_file(&client->dev, &dev_attr_pec); | |
271dabf5 | 886 | if (data->kind != max6657 && data->kind != max6646) |
69f2f96d JD |
887 | device_remove_file(&client->dev, |
888 | &sensor_dev_attr_temp2_offset.dev_attr); | |
943b0830 | 889 | |
95238364 JD |
890 | /* Restore initial configuration */ |
891 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
892 | data->config_orig); | |
893 | ||
943b0830 | 894 | kfree(data); |
1da177e4 LT |
895 | return 0; |
896 | } | |
897 | ||
6388a388 JD |
898 | static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, u16 *value) |
899 | { | |
900 | int err; | |
901 | u8 oldh, newh, l; | |
902 | ||
903 | /* | |
904 | * There is a trick here. We have to read two registers to have the | |
905 | * sensor temperature, but we have to beware a conversion could occur | |
906 | * inbetween the readings. The datasheet says we should either use | |
907 | * the one-shot conversion register, which we don't want to do | |
908 | * (disables hardware monitoring) or monitor the busy bit, which is | |
909 | * impossible (we can't read the values and monitor that bit at the | |
910 | * exact same time). So the solution used here is to read the high | |
911 | * byte once, then the low byte, then the high byte again. If the new | |
912 | * high byte matches the old one, then we have a valid reading. Else | |
913 | * we have to read the low byte again, and now we believe we have a | |
914 | * correct reading. | |
915 | */ | |
916 | if ((err = lm90_read_reg(client, regh, &oldh)) | |
917 | || (err = lm90_read_reg(client, regl, &l)) | |
918 | || (err = lm90_read_reg(client, regh, &newh))) | |
919 | return err; | |
920 | if (oldh != newh) { | |
921 | err = lm90_read_reg(client, regl, &l); | |
922 | if (err) | |
923 | return err; | |
924 | } | |
925 | *value = (newh << 8) | l; | |
926 | ||
927 | return 0; | |
928 | } | |
929 | ||
1da177e4 LT |
930 | static struct lm90_data *lm90_update_device(struct device *dev) |
931 | { | |
932 | struct i2c_client *client = to_i2c_client(dev); | |
933 | struct lm90_data *data = i2c_get_clientdata(client); | |
934 | ||
9a61bf63 | 935 | mutex_lock(&data->update_lock); |
1da177e4 LT |
936 | |
937 | if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { | |
6388a388 | 938 | u8 h, l; |
1da177e4 LT |
939 | |
940 | dev_dbg(&client->dev, "Updating lm90 data.\n"); | |
f65e1708 JD |
941 | lm90_read_reg(client, LM90_REG_R_LOCAL_LOW, &data->temp8[0]); |
942 | lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH, &data->temp8[1]); | |
943 | lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT, &data->temp8[2]); | |
944 | lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT, &data->temp8[3]); | |
8256fe0f | 945 | lm90_read_reg(client, LM90_REG_R_TCRIT_HYST, &data->temp_hyst); |
1da177e4 | 946 | |
271dabf5 | 947 | if (data->kind == max6657 || data->kind == max6646) { |
f65e1708 JD |
948 | lm90_read16(client, LM90_REG_R_LOCAL_TEMP, |
949 | MAX6657_REG_R_LOCAL_TEMPL, | |
950 | &data->temp11[4]); | |
951 | } else { | |
952 | if (lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP, | |
953 | &h) == 0) | |
954 | data->temp11[4] = h << 8; | |
955 | } | |
6388a388 JD |
956 | lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, |
957 | LM90_REG_R_REMOTE_TEMPL, &data->temp11[0]); | |
958 | ||
5f502a83 JD |
959 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h) == 0) { |
960 | data->temp11[1] = h << 8; | |
961 | if (data->kind != max6657 && data->kind != max6680 | |
271dabf5 | 962 | && data->kind != max6646 |
5f502a83 JD |
963 | && lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL, |
964 | &l) == 0) | |
965 | data->temp11[1] |= l; | |
966 | } | |
967 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h) == 0) { | |
968 | data->temp11[2] = h << 8; | |
969 | if (data->kind != max6657 && data->kind != max6680 | |
271dabf5 | 970 | && data->kind != max6646 |
5f502a83 JD |
971 | && lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL, |
972 | &l) == 0) | |
973 | data->temp11[2] |= l; | |
974 | } | |
975 | ||
271dabf5 | 976 | if (data->kind != max6657 && data->kind != max6646) { |
69f2f96d | 977 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSH, |
6388a388 | 978 | &h) == 0 |
69f2f96d JD |
979 | && lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSL, |
980 | &l) == 0) | |
6388a388 | 981 | data->temp11[3] = (h << 8) | l; |
69f2f96d | 982 | } |
8256fe0f | 983 | lm90_read_reg(client, LM90_REG_R_STATUS, &data->alarms); |
1da177e4 LT |
984 | |
985 | data->last_updated = jiffies; | |
986 | data->valid = 1; | |
987 | } | |
988 | ||
9a61bf63 | 989 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
990 | |
991 | return data; | |
992 | } | |
993 | ||
994 | static int __init sensors_lm90_init(void) | |
995 | { | |
996 | return i2c_add_driver(&lm90_driver); | |
997 | } | |
998 | ||
999 | static void __exit sensors_lm90_exit(void) | |
1000 | { | |
1001 | i2c_del_driver(&lm90_driver); | |
1002 | } | |
1003 | ||
1004 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); | |
1005 | MODULE_DESCRIPTION("LM90/ADM1032 driver"); | |
1006 | MODULE_LICENSE("GPL"); | |
1007 | ||
1008 | module_init(sensors_lm90_init); | |
1009 | module_exit(sensors_lm90_exit); |