1 Kernel driver lm90 1 Kernel driver lm90
2 ================== 2 ==================
3 3
4 Supported chips: 4 Supported chips:
5 5
6 * National Semiconductor LM84 6 * National Semiconductor LM84
7 7
8 Prefix: 'lm84' 8 Prefix: 'lm84'
9 9
10 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 10 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
11 11
12 Datasheet: Publicly available at the Natio 12 Datasheet: Publicly available at the National Semiconductor website
13 13
14 * National Semiconductor LM90 14 * National Semiconductor LM90
15 15
16 Prefix: 'lm90' 16 Prefix: 'lm90'
17 17
18 Addresses scanned: I2C 0x4c 18 Addresses scanned: I2C 0x4c
19 19
20 Datasheet: Publicly available at the Natio 20 Datasheet: Publicly available at the National Semiconductor website
21 21
22 http://www.national.com/pf/LM/L 22 http://www.national.com/pf/LM/LM90.html
23 23
24 * National Semiconductor LM89 24 * National Semiconductor LM89
25 25
26 Prefix: 'lm89' (no auto-detection) 26 Prefix: 'lm89' (no auto-detection)
27 27
28 Addresses scanned: I2C 0x4c and 0x4d 28 Addresses scanned: I2C 0x4c and 0x4d
29 29
30 Datasheet: Publicly available at the Natio 30 Datasheet: Publicly available at the National Semiconductor website
31 31
32 http://www.national.com/mpf/LM/ 32 http://www.national.com/mpf/LM/LM89.html
33 33
34 * National Semiconductor LM99 34 * National Semiconductor LM99
35 35
36 Prefix: 'lm99' 36 Prefix: 'lm99'
37 37
38 Addresses scanned: I2C 0x4c and 0x4d 38 Addresses scanned: I2C 0x4c and 0x4d
39 39
40 Datasheet: Publicly available at the Natio 40 Datasheet: Publicly available at the National Semiconductor website
41 41
42 http://www.national.com/pf/LM/L 42 http://www.national.com/pf/LM/LM99.html
43 43
44 * National Semiconductor LM86 44 * National Semiconductor LM86
45 45
46 Prefix: 'lm86' 46 Prefix: 'lm86'
47 47
48 Addresses scanned: I2C 0x4c 48 Addresses scanned: I2C 0x4c
49 49
50 Datasheet: Publicly available at the Natio 50 Datasheet: Publicly available at the National Semiconductor website
51 51
52 http://www.national.com/mpf/LM/ 52 http://www.national.com/mpf/LM/LM86.html
53 53
54 * Analog Devices ADM1020 54 * Analog Devices ADM1020
55 55
56 Prefix: 'adm1020' 56 Prefix: 'adm1020'
57 57
58 Addresses scanned: I2C 0x4c - 0x4e 58 Addresses scanned: I2C 0x4c - 0x4e
59 59
60 Datasheet: Publicly available at the Analo 60 Datasheet: Publicly available at the Analog Devices website
61 61
62 * Analog Devices ADM1021 62 * Analog Devices ADM1021
63 63
64 Prefix: 'adm1021' 64 Prefix: 'adm1021'
65 65
66 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 66 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
67 67
68 Datasheet: Publicly available at the Analo 68 Datasheet: Publicly available at the Analog Devices website
69 69
70 * Analog Devices ADM1021A/ADM1023 70 * Analog Devices ADM1021A/ADM1023
71 71
72 Prefix: 'adm1023' 72 Prefix: 'adm1023'
73 73
74 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 74 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
75 75
76 Datasheet: Publicly available at the Analo 76 Datasheet: Publicly available at the Analog Devices website
77 77
78 * Analog Devices ADM1032 78 * Analog Devices ADM1032
79 79
80 Prefix: 'adm1032' 80 Prefix: 'adm1032'
81 81
82 Addresses scanned: I2C 0x4c and 0x4d 82 Addresses scanned: I2C 0x4c and 0x4d
83 83
84 Datasheet: Publicly available at the ON Se 84 Datasheet: Publicly available at the ON Semiconductor website
85 85
86 https://www.onsemi.com/PowerSol 86 https://www.onsemi.com/PowerSolutions/product.do?id=ADM1032
87 87
88 * Analog Devices ADT7461 88 * Analog Devices ADT7461
89 89
90 Prefix: 'adt7461' 90 Prefix: 'adt7461'
91 91
92 Addresses scanned: I2C 0x4c and 0x4d 92 Addresses scanned: I2C 0x4c and 0x4d
93 93
94 Datasheet: Publicly available at the ON Se 94 Datasheet: Publicly available at the ON Semiconductor website
95 95
96 https://www.onsemi.com/PowerSol 96 https://www.onsemi.com/PowerSolutions/product.do?id=ADT7461
97 97
98 * Analog Devices ADT7461A 98 * Analog Devices ADT7461A
99 99
100 Prefix: 'adt7461a' 100 Prefix: 'adt7461a'
101 101
102 Addresses scanned: I2C 0x4c and 0x4d 102 Addresses scanned: I2C 0x4c and 0x4d
103 103
104 Datasheet: Publicly available at the ON Se 104 Datasheet: Publicly available at the ON Semiconductor website
105 105
106 https://www.onsemi.com/PowerSol 106 https://www.onsemi.com/PowerSolutions/product.do?id=ADT7461A
107 107
108 * Analog Devices ADT7481 108 * Analog Devices ADT7481
109 109
110 Prefix: 'adt7481' 110 Prefix: 'adt7481'
111 111
112 Addresses scanned: I2C 0x4b and 0x4c 112 Addresses scanned: I2C 0x4b and 0x4c
113 113
114 Datasheet: Publicly available at the ON Se 114 Datasheet: Publicly available at the ON Semiconductor website
115 115
116 https://www.onsemi.com/PowerSol 116 https://www.onsemi.com/PowerSolutions/product.do?id=ADT7481
117 117
118 * Analog Devices ADT7482 118 * Analog Devices ADT7482
119 119
120 Prefix: 'adt7482' 120 Prefix: 'adt7482'
121 121
122 Addresses scanned: I2C 0x4c 122 Addresses scanned: I2C 0x4c
123 123
124 Datasheet: Publicly available at the ON Se 124 Datasheet: Publicly available at the ON Semiconductor website
125 125
126 https://www.onsemi.com/PowerSol 126 https://www.onsemi.com/PowerSolutions/product.do?id=ADT7482
127 127
128 * Analog Devices ADT7483A 128 * Analog Devices ADT7483A
129 129
130 Prefix: 'adt7483a' 130 Prefix: 'adt7483a'
131 131
132 Addresses scanned: I2C 0x18, 0x19, 0x1a, 0 132 Addresses scanned: I2C 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e
133 133
134 Datasheet: Publicly available at the ON Se 134 Datasheet: Publicly available at the ON Semiconductor website
135 135
136 https://www.onsemi.com/PowerSol 136 https://www.onsemi.com/PowerSolutions/product.do?id=ADT7483A
137 137
138 * ON Semiconductor NCT1008 138 * ON Semiconductor NCT1008
139 139
140 Prefix: 'nct1008' 140 Prefix: 'nct1008'
141 141
142 Addresses scanned: I2C 0x4c and 0x4d 142 Addresses scanned: I2C 0x4c and 0x4d
143 143
144 Datasheet: Publicly available at the ON Se 144 Datasheet: Publicly available at the ON Semiconductor website
145 145
146 https://www.onsemi.com/PowerSol 146 https://www.onsemi.com/PowerSolutions/product.do?id=NCT1008
147 147
148 * ON Semiconductor NCT210 148 * ON Semiconductor NCT210
149 149
150 Prefix: 'adm1021' 150 Prefix: 'adm1021'
151 151
152 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 152 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
153 153
154 Datasheet: Publicly available at the ON Se 154 Datasheet: Publicly available at the ON Semiconductor website
155 155
156 https://www.onsemi.com/PowerSol 156 https://www.onsemi.com/PowerSolutions/product.do?id=NCT210
157 157
158 * ON Semiconductor NCT214 158 * ON Semiconductor NCT214
159 159
160 Prefix: 'nct214' 160 Prefix: 'nct214'
161 161
162 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 162 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
163 163
164 Datasheet: Publicly available at the ON Se 164 Datasheet: Publicly available at the ON Semiconductor website
165 165
166 https://www.onsemi.com/PowerSol 166 https://www.onsemi.com/PowerSolutions/product.do?id=NCT214
167 167
168 * ON Semiconductor NCT218 168 * ON Semiconductor NCT218
169 169
170 Prefix: 'nct218' 170 Prefix: 'nct218'
171 171
172 Addresses scanned: I2C 0x4c - 0x4d 172 Addresses scanned: I2C 0x4c - 0x4d
173 173
174 Datasheet: Publicly available at the ON Se 174 Datasheet: Publicly available at the ON Semiconductor website
175 175
176 https://www.onsemi.com/PowerSol 176 https://www.onsemi.com/PowerSolutions/product.do?id=NCT218
177 177
178 * ON Semiconductor NCT72 178 * ON Semiconductor NCT72
179 179
180 Prefix: 'nct72' 180 Prefix: 'nct72'
181 181
182 Addresses scanned: I2C 0x4c - 0x4d 182 Addresses scanned: I2C 0x4c - 0x4d
183 183
184 Datasheet: Publicly available at the ON Se 184 Datasheet: Publicly available at the ON Semiconductor website
185 185
186 https://www.onsemi.com/PowerSol 186 https://www.onsemi.com/PowerSolutions/product.do?id=NCT72
187 187
188 * Maxim MAX1617 188 * Maxim MAX1617
189 189
190 Prefix: 'max1617' 190 Prefix: 'max1617'
191 191
192 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 192 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
193 193
194 Datasheet: Publicly available at the Maxim 194 Datasheet: Publicly available at the Maxim website
195 195
196 * Maxim MAX1617A 196 * Maxim MAX1617A
197 197
198 Prefix: 'max1617a' 198 Prefix: 'max1617a'
199 199
200 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 200 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
201 201
202 Datasheet: Publicly available at the Maxim 202 Datasheet: Publicly available at the Maxim website
203 203
204 * Maxim MAX6642 204 * Maxim MAX6642
205 205
206 Prefix: 'max6642' 206 Prefix: 'max6642'
207 207
208 Addresses scanned: I2C 0x48-0x4f 208 Addresses scanned: I2C 0x48-0x4f
209 209
210 Datasheet: Publicly available at the Maxim 210 Datasheet: Publicly available at the Maxim website
211 211
212 http://datasheets.maxim-ic.com/ 212 http://datasheets.maxim-ic.com/en/ds/MAX6642.pdf
213 213
214 * Maxim MAX6646 214 * Maxim MAX6646
215 215
216 Prefix: 'max6646' 216 Prefix: 'max6646'
217 217
218 Addresses scanned: I2C 0x4d 218 Addresses scanned: I2C 0x4d
219 219
220 Datasheet: Publicly available at the Maxim 220 Datasheet: Publicly available at the Maxim website
221 221
222 http://www.maxim-ic.com/quick_v 222 http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3497
223 223
224 * Maxim MAX6647 224 * Maxim MAX6647
225 225
226 Prefix: 'max6646' 226 Prefix: 'max6646'
227 227
228 Addresses scanned: I2C 0x4e 228 Addresses scanned: I2C 0x4e
229 229
230 Datasheet: Publicly available at the Maxim 230 Datasheet: Publicly available at the Maxim website
231 231
232 http://www.maxim-ic.com/quick_v 232 http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3497
233 233
234 * Maxim MAX6648 234 * Maxim MAX6648
235 235
236 Prefix: 'max6648' 236 Prefix: 'max6648'
237 237
238 Addresses scanned: I2C 0x4c 238 Addresses scanned: I2C 0x4c
239 239
240 Datasheet: Publicly available at the Maxim 240 Datasheet: Publicly available at the Maxim website
241 241
242 http://www.maxim-ic.com/quick_v 242 http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3500
243 243
244 * Maxim MAX6649 244 * Maxim MAX6649
245 245
246 Prefix: 'max6646' 246 Prefix: 'max6646'
247 247
248 Addresses scanned: I2C 0x4c 248 Addresses scanned: I2C 0x4c
249 249
250 Datasheet: Publicly available at the Maxim 250 Datasheet: Publicly available at the Maxim website
251 251
252 http://www.maxim-ic.com/quick_v 252 http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3497
253 253
254 * Maxim MAX6654 254 * Maxim MAX6654
255 255
256 Prefix: 'max6654' 256 Prefix: 'max6654'
257 257
258 Addresses scanned: I2C 0x18, 0x19, 0x1a, 0 258 Addresses scanned: I2C 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b,
259 259
260 0x4c, 0x4d and 0x4e 260 0x4c, 0x4d and 0x4e
261 261
262 Datasheet: Publicly available at the Maxim 262 Datasheet: Publicly available at the Maxim website
263 263
264 https://www.maximintegrated.com 264 https://www.maximintegrated.com/en/products/sensors/MAX6654.html
265 265
266 * Maxim MAX6657 266 * Maxim MAX6657
267 267
268 Prefix: 'max6657' 268 Prefix: 'max6657'
269 269
270 Addresses scanned: I2C 0x4c 270 Addresses scanned: I2C 0x4c
271 271
272 Datasheet: Publicly available at the Maxim 272 Datasheet: Publicly available at the Maxim website
273 273
274 http://www.maxim-ic.com/quick_v 274 http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2578
275 275
276 * Maxim MAX6658 276 * Maxim MAX6658
277 277
278 Prefix: 'max6657' 278 Prefix: 'max6657'
279 279
280 Addresses scanned: I2C 0x4c 280 Addresses scanned: I2C 0x4c
281 281
282 Datasheet: Publicly available at the Maxim 282 Datasheet: Publicly available at the Maxim website
283 283
284 http://www.maxim-ic.com/quick_v 284 http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2578
285 285
286 * Maxim MAX6659 286 * Maxim MAX6659
287 287
288 Prefix: 'max6659' 288 Prefix: 'max6659'
289 289
290 Addresses scanned: I2C 0x4c, 0x4d, 0x4e 290 Addresses scanned: I2C 0x4c, 0x4d, 0x4e
291 291
292 Datasheet: Publicly available at the Maxim 292 Datasheet: Publicly available at the Maxim website
293 293
294 http://www.maxim-ic.com/quick_v 294 http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2578
295 295
296 * Maxim MAX6680 296 * Maxim MAX6680
297 297
298 Prefix: 'max6680' 298 Prefix: 'max6680'
299 299
300 Addresses scanned: I2C 0x18, 0x19, 0x1a, 0 300 Addresses scanned: I2C 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b,
301 301
302 0x4c, 0x4d and 0x4e 302 0x4c, 0x4d and 0x4e
303 303
304 Datasheet: Publicly available at the Maxim 304 Datasheet: Publicly available at the Maxim website
305 305
306 http://www.maxim-ic.com/quick_v 306 http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3370
307 307
308 * Maxim MAX6681 308 * Maxim MAX6681
309 309
310 Prefix: 'max6680' 310 Prefix: 'max6680'
311 311
312 Addresses scanned: I2C 0x18, 0x19, 0x1a, 0 312 Addresses scanned: I2C 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b,
313 313
314 0x4c, 0x4d and 0x4e 314 0x4c, 0x4d and 0x4e
315 315
316 Datasheet: Publicly available at the Maxim 316 Datasheet: Publicly available at the Maxim website
317 317
318 http://www.maxim-ic.com/quick_v 318 http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3370
319 319
320 * Maxim MAX6692 320 * Maxim MAX6692
321 321
322 Prefix: 'max6648' 322 Prefix: 'max6648'
323 323
324 Addresses scanned: I2C 0x4c 324 Addresses scanned: I2C 0x4c
325 325
326 Datasheet: Publicly available at the Maxim 326 Datasheet: Publicly available at the Maxim website
327 327
328 http://www.maxim-ic.com/quick_v 328 http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3500
329 329
330 * Maxim MAX6695 330 * Maxim MAX6695
331 331
332 Prefix: 'max6695' 332 Prefix: 'max6695'
333 333
334 Addresses scanned: I2C 0x18 334 Addresses scanned: I2C 0x18
335 335
336 Datasheet: Publicly available at the Maxim 336 Datasheet: Publicly available at the Maxim website
337 337
338 http://www.maxim-ic.com/datashe 338 http://www.maxim-ic.com/datasheet/index.mvp/id/4199
339 339
340 * Maxim MAX6696 340 * Maxim MAX6696
341 341
342 Prefix: 'max6695' 342 Prefix: 'max6695'
343 343
344 Addresses scanned: I2C 0x18, 0x19, 0x1a, 0 344 Addresses scanned: I2C 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b,
345 345
346 0x4c, 0x4d and 0x4e 346 0x4c, 0x4d and 0x4e
347 347
348 Datasheet: Publicly available at the Maxim 348 Datasheet: Publicly available at the Maxim website
349 349
350 http://www.maxim-ic.com/datashe 350 http://www.maxim-ic.com/datasheet/index.mvp/id/4199
351 351
352 * Winbond/Nuvoton W83L771W/G 352 * Winbond/Nuvoton W83L771W/G
353 353
354 Prefix: 'w83l771' 354 Prefix: 'w83l771'
355 355
356 Addresses scanned: I2C 0x4c 356 Addresses scanned: I2C 0x4c
357 357
358 Datasheet: No longer available 358 Datasheet: No longer available
359 359
360 * Winbond/Nuvoton W83L771AWG/ASG 360 * Winbond/Nuvoton W83L771AWG/ASG
361 361
362 Prefix: 'w83l771' 362 Prefix: 'w83l771'
363 363
364 Addresses scanned: I2C 0x4c 364 Addresses scanned: I2C 0x4c
365 365
366 Datasheet: Not publicly available, can be 366 Datasheet: Not publicly available, can be requested from Nuvoton
367 367
368 * Philips/NXP SA56004X 368 * Philips/NXP SA56004X
369 369
370 Prefix: 'sa56004' 370 Prefix: 'sa56004'
371 371
372 Addresses scanned: I2C 0x48 through 0x4F 372 Addresses scanned: I2C 0x48 through 0x4F
373 373
374 Datasheet: Publicly available at NXP websi 374 Datasheet: Publicly available at NXP website
375 375
376 http://ics.nxp.com/products/int 376 http://ics.nxp.com/products/interface/datasheet/sa56004x.pdf
377 377
378 * GMT G781 378 * GMT G781
379 379
380 Prefix: 'g781' 380 Prefix: 'g781'
381 381
382 Addresses scanned: I2C 0x4c, 0x4d 382 Addresses scanned: I2C 0x4c, 0x4d
383 383
384 Datasheet: Not publicly available from GMT 384 Datasheet: Not publicly available from GMT
385 385
386 * Texas Instruments TMP451 386 * Texas Instruments TMP451
387 387
388 Prefix: 'tmp451' 388 Prefix: 'tmp451'
389 389
390 Addresses scanned: I2C 0x4c 390 Addresses scanned: I2C 0x4c
391 391
392 Datasheet: Publicly available at TI websit 392 Datasheet: Publicly available at TI website
393 393
394 https://www.ti.com/litv/pdf/sbo 394 https://www.ti.com/litv/pdf/sbos686
395 395
396 * Texas Instruments TMP461 396 * Texas Instruments TMP461
397 397
398 Prefix: 'tmp461' 398 Prefix: 'tmp461'
399 399
400 Addresses scanned: I2C 0x48 through 0x4F 400 Addresses scanned: I2C 0x48 through 0x4F
401 401
402 Datasheet: Publicly available at TI websit 402 Datasheet: Publicly available at TI website
403 403
404 https://www.ti.com/lit/gpn/tmp4 404 https://www.ti.com/lit/gpn/tmp461
405 405
406 * Philips NE1617, NE1617A 406 * Philips NE1617, NE1617A
407 407
408 Prefix: 'max1617' (probably detected as a 408 Prefix: 'max1617' (probably detected as a max1617)
409 409
410 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 410 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
411 411
412 Datasheets: Publicly available at the Phil 412 Datasheets: Publicly available at the Philips website
413 413
414 * Philips NE1618 414 * Philips NE1618
415 415
416 Prefix: 'ne1618' 416 Prefix: 'ne1618'
417 417
418 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 418 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
419 419
420 Datasheets: Publicly available at the Phil 420 Datasheets: Publicly available at the Philips website
421 421
422 * Genesys Logic GL523SM 422 * Genesys Logic GL523SM
423 423
424 Prefix: 'gl523sm' 424 Prefix: 'gl523sm'
425 425
426 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 426 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
427 427
428 Datasheet: 428 Datasheet:
429 429
430 * TI THMC10 430 * TI THMC10
431 431
432 Prefix: 'thmc10' 432 Prefix: 'thmc10'
433 433
434 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 434 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
435 435
436 Datasheet: Publicly available at the TI we 436 Datasheet: Publicly available at the TI website
437 437
438 * Onsemi MC1066 438 * Onsemi MC1066
439 439
440 Prefix: 'mc1066' 440 Prefix: 'mc1066'
441 441
442 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 442 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
443 443
444 Datasheet: Publicly available at the Onsem 444 Datasheet: Publicly available at the Onsemi website
445 445
446 Author: Jean Delvare <jdelvare@suse.de> 446 Author: Jean Delvare <jdelvare@suse.de>
447 447
448 448
449 Description 449 Description
450 ----------- 450 -----------
451 451
452 The LM90 is a digital temperature sensor. It s 452 The LM90 is a digital temperature sensor. It senses its own temperature as
453 well as the temperature of up to one external 453 well as the temperature of up to one external diode. It is compatible
454 with many other devices, many of which are sup 454 with many other devices, many of which are supported by this driver.
455 455
456 The family of chips supported by this driver i 456 The family of chips supported by this driver is derived from MAX1617.
457 This chip as well as various compatible chips 457 This chip as well as various compatible chips support a local and a remote
458 temperature sensor with 8 bit accuracy. Later 458 temperature sensor with 8 bit accuracy. Later chips provide improved accuracy
459 and other additional features such as hysteres 459 and other additional features such as hysteresis and temperature offset
460 registers. 460 registers.
461 461
462 Note that there is no easy way to differentiat 462 Note that there is no easy way to differentiate between the MAX6657,
463 MAX6658 and MAX6659 variants. The extra featur 463 MAX6658 and MAX6659 variants. The extra features of the MAX6659 are only
464 supported by this driver if the chip is locate 464 supported by this driver if the chip is located at address 0x4d or 0x4e,
465 or if the chip type is explicitly selected as 465 or if the chip type is explicitly selected as max6659.
466 The MAX6680 and MAX6681 only differ in their p 466 The MAX6680 and MAX6681 only differ in their pinout, therefore they obviously
467 can't (and don't need to) be distinguished. 467 can't (and don't need to) be distinguished.
468 468
469 The different chipsets of the family are not s 469 The different chipsets of the family are not strictly identical, although
470 very similar. For reference, here comes a non- 470 very similar. For reference, here comes a non-exhaustive list of specific
471 features: 471 features:
472 472
473 LM84: 473 LM84:
474 * 8 bit sensor resolution 474 * 8 bit sensor resolution
475 475
476 ADM1020, ADM1021, GL523SM, MAX1617, NE1617, NE 476 ADM1020, ADM1021, GL523SM, MAX1617, NE1617, NE1617A, THMC10:
477 * 8 bit sensor resolution 477 * 8 bit sensor resolution
478 * Low temperature limits 478 * Low temperature limits
479 479
480 NCT210, NE1618: 480 NCT210, NE1618:
481 * 11 bit sensor resolution for remote temper 481 * 11 bit sensor resolution for remote temperature sensor
482 * Low temperature limits 482 * Low temperature limits
483 483
484 ADM1021A, ADM1023: 484 ADM1021A, ADM1023:
485 * Temperature offset register for remote tem 485 * Temperature offset register for remote temperature sensor
486 * 11 bit resolution for remote temperature s 486 * 11 bit resolution for remote temperature sensor
487 * Low temperature limits 487 * Low temperature limits
488 488
489 LM90: 489 LM90:
490 * 11 bit resolution for remote temperature s 490 * 11 bit resolution for remote temperature sensor
491 * Temperature offset register for remote tem 491 * Temperature offset register for remote temperature sensor
492 * Low and critical temperature limits 492 * Low and critical temperature limits
493 * Configurable conversion rate 493 * Configurable conversion rate
494 * Filter and alert configuration register at 494 * Filter and alert configuration register at 0xBF.
495 * ALERT is triggered by temperatures over cr 495 * ALERT is triggered by temperatures over critical limits.
496 496
497 LM86 and LM89: 497 LM86 and LM89:
498 * Same as LM90 498 * Same as LM90
499 * Better external channel accuracy 499 * Better external channel accuracy
500 500
501 LM99: 501 LM99:
502 * Same as LM89 502 * Same as LM89
503 * External temperature shifted by 16 degrees 503 * External temperature shifted by 16 degrees down
504 504
505 ADM1032: 505 ADM1032:
506 * Consecutive alert register at 0x22. 506 * Consecutive alert register at 0x22.
507 * Conversion averaging. 507 * Conversion averaging.
508 * Up to 64 conversions/s. 508 * Up to 64 conversions/s.
509 * ALERT is triggered by open remote sensor. 509 * ALERT is triggered by open remote sensor.
510 * SMBus PEC support for Write Byte and Recei 510 * SMBus PEC support for Write Byte and Receive Byte transactions.
511 511
512 ADT7461, ADT7461A, NCT1008: 512 ADT7461, ADT7461A, NCT1008:
513 * Extended temperature range (breaks compati 513 * Extended temperature range (breaks compatibility)
514 * Lower resolution for remote temperature 514 * Lower resolution for remote temperature
515 * SMBus PEC support for Write Byte and Recei 515 * SMBus PEC support for Write Byte and Receive Byte transactions.
516 * 10 bit temperature resolution 516 * 10 bit temperature resolution
517 517
518 ADT7481, ADT7482, ADT7483: 518 ADT7481, ADT7482, ADT7483:
519 * Temperature offset register 519 * Temperature offset register
520 * SMBus PEC support 520 * SMBus PEC support
521 * 10 bit temperature resolution for external 521 * 10 bit temperature resolution for external sensors
522 * Two remote sensors 522 * Two remote sensors
523 * Selectable address (ADT7483) 523 * Selectable address (ADT7483)
524 524
525 MAX6642: 525 MAX6642:
526 * No critical limit register 526 * No critical limit register
527 * Conversion rate not configurable 527 * Conversion rate not configurable
528 * Better local resolution (10 bit) 528 * Better local resolution (10 bit)
529 * 10 bit external sensor resolution 529 * 10 bit external sensor resolution
530 530
531 MAX6646, MAX6647, MAX6649: 531 MAX6646, MAX6647, MAX6649:
532 * Better local resolution 532 * Better local resolution
533 * Extended range unsigned external temperatu 533 * Extended range unsigned external temperature
534 534
535 MAX6648, MAX6692: 535 MAX6648, MAX6692:
536 * Better local resolution 536 * Better local resolution
537 * Unsigned temperature 537 * Unsigned temperature
538 538
539 MAX6654, MAX6690: 539 MAX6654, MAX6690:
540 * Better local resolution 540 * Better local resolution
541 * Selectable address 541 * Selectable address
542 * Remote sensor type selection 542 * Remote sensor type selection
543 * Extended temperature range 543 * Extended temperature range
544 * Extended resolution only available when co 544 * Extended resolution only available when conversion rate <= 1 Hz
545 545
546 MAX6657 and MAX6658: 546 MAX6657 and MAX6658:
547 * Better local resolution 547 * Better local resolution
548 * Remote sensor type selection 548 * Remote sensor type selection
549 549
550 MAX6659: 550 MAX6659:
551 * Better local resolution 551 * Better local resolution
552 * Selectable address 552 * Selectable address
553 * Second critical temperature limit 553 * Second critical temperature limit
554 * Remote sensor type selection 554 * Remote sensor type selection
555 555
556 MAX6680 and MAX6681: 556 MAX6680 and MAX6681:
557 * Selectable address 557 * Selectable address
558 * Remote sensor type selection 558 * Remote sensor type selection
559 559
560 MAX6695 and MAX6696: 560 MAX6695 and MAX6696:
561 * Better local resolution 561 * Better local resolution
562 * Selectable address (max6696) 562 * Selectable address (max6696)
563 * Second critical temperature limit 563 * Second critical temperature limit
564 * Two remote sensors 564 * Two remote sensors
565 565
566 W83L771W/G 566 W83L771W/G
567 * The G variant is lead-free, otherwise simi 567 * The G variant is lead-free, otherwise similar to the W.
568 * Filter and alert configuration register at 568 * Filter and alert configuration register at 0xBF
569 * Moving average (depending on conversion ra 569 * Moving average (depending on conversion rate)
570 570
571 W83L771AWG/ASG 571 W83L771AWG/ASG
572 * Successor of the W83L771W/G, same features 572 * Successor of the W83L771W/G, same features.
573 * The AWG and ASG variants only differ in pa 573 * The AWG and ASG variants only differ in package format.
574 * Diode ideality factor configuration (remot 574 * Diode ideality factor configuration (remote sensor) at 0xE3
575 575
576 SA56004X: 576 SA56004X:
577 * Better local resolution 577 * Better local resolution
578 578
579 All temperature values are given in degrees Ce 579 All temperature values are given in degrees Celsius. Resolution
580 is 1.0 degree for the local temperature, 0.125 580 is 1.0 degree for the local temperature, 0.125 degree for the remote
581 temperature, except for the MAX6654, MAX6657, 581 temperature, except for the MAX6654, MAX6657, MAX6658 and MAX6659 which have
582 a resolution of 0.125 degree for both temperat 582 a resolution of 0.125 degree for both temperatures.
583 583
584 Each sensor has its own high and low limits, p 584 Each sensor has its own high and low limits, plus a critical limit.
585 Additionally, there is a relative hysteresis v 585 Additionally, there is a relative hysteresis value common to both critical
586 values. To make life easier to user-space appl 586 values. To make life easier to user-space applications, two absolute values
587 are exported, one for each channel, but these 587 are exported, one for each channel, but these values are of course linked.
588 Only the local hysteresis can be set from user 588 Only the local hysteresis can be set from user-space, and the same delta
589 applies to the remote hysteresis. 589 applies to the remote hysteresis.
590 590
591 The lm90 driver will not update its values mor 591 The lm90 driver will not update its values more frequently than configured with
592 the update_interval attribute; reading them mo 592 the update_interval attribute; reading them more often will do no harm, but will
593 return 'old' values. 593 return 'old' values.
594 594
595 SMBus Alert Support 595 SMBus Alert Support
596 ------------------- 596 -------------------
597 597
598 This driver has basic support for SMBus alert. 598 This driver has basic support for SMBus alert. When an alert is received,
599 the status register is read and the faulty tem 599 the status register is read and the faulty temperature channel is logged.
600 600
601 The Analog Devices chips (ADM1032, ADT7461 and 601 The Analog Devices chips (ADM1032, ADT7461 and ADT7461A) and ON
602 Semiconductor chips (NCT1008) do not implement 602 Semiconductor chips (NCT1008) do not implement the SMBus alert protocol
603 properly so additional care is needed: the ALE 603 properly so additional care is needed: the ALERT output is disabled when
604 an alert is received, and is re-enabled only w 604 an alert is received, and is re-enabled only when the alarm is gone.
605 Otherwise the chip would block alerts from oth 605 Otherwise the chip would block alerts from other chips in the bus as long
606 as the alarm is active. 606 as the alarm is active.
607 607
608 PEC Support 608 PEC Support
609 ----------- 609 -----------
610 610
611 The ADM1032 is the only chip of the family whi 611 The ADM1032 is the only chip of the family which supports PEC. It does
612 not support PEC on all transactions though, so 612 not support PEC on all transactions though, so some care must be taken.
613 613
614 When reading a register value, the PEC byte is 614 When reading a register value, the PEC byte is computed and sent by the
615 ADM1032 chip. However, in the case of a combin 615 ADM1032 chip. However, in the case of a combined transaction (SMBus Read
616 Byte), the ADM1032 computes the CRC value over 616 Byte), the ADM1032 computes the CRC value over only the second half of
617 the message rather than its entirety, because 617 the message rather than its entirety, because it thinks the first half
618 of the message belongs to a different transact 618 of the message belongs to a different transaction. As a result, the CRC
619 value differs from what the SMBus master expec 619 value differs from what the SMBus master expects, and all reads fail.
620 620
621 For this reason, the lm90 driver will enable P 621 For this reason, the lm90 driver will enable PEC for the ADM1032 only if
622 the bus supports the SMBus Send Byte and Recei 622 the bus supports the SMBus Send Byte and Receive Byte transaction types.
623 These transactions will be used to read regist 623 These transactions will be used to read register values, instead of
624 SMBus Read Byte, and PEC will work properly. 624 SMBus Read Byte, and PEC will work properly.
625 625
626 Additionally, the ADM1032 doesn't support SMBu 626 Additionally, the ADM1032 doesn't support SMBus Send Byte with PEC.
627 Instead, it will try to write the PEC value to 627 Instead, it will try to write the PEC value to the register (because the
628 SMBus Send Byte transaction with PEC is simila 628 SMBus Send Byte transaction with PEC is similar to a Write Byte transaction
629 without PEC), which is not what we want. Thus, 629 without PEC), which is not what we want. Thus, PEC is explicitly disabled
630 on SMBus Send Byte transactions in the lm90 dr 630 on SMBus Send Byte transactions in the lm90 driver.
631 631
632 PEC on byte data transactions represents a sig 632 PEC on byte data transactions represents a significant increase in bandwidth
633 usage (+33% for writes, +25% for reads) in nor 633 usage (+33% for writes, +25% for reads) in normal conditions. With the need
634 to use two SMBus transaction for reads, this o 634 to use two SMBus transaction for reads, this overhead jumps to +50%. Worse,
635 two transactions will typically mean twice as 635 two transactions will typically mean twice as much delay waiting for
636 transaction completion, effectively doubling t 636 transaction completion, effectively doubling the register cache refresh time.
637 I guess reliability comes at a price, but it's 637 I guess reliability comes at a price, but it's quite expensive this time.
638 638
639 So, as not everyone might enjoy the slowdown, 639 So, as not everyone might enjoy the slowdown, PEC is disabled by default and
640 can be enabled through sysfs. Just write 1 to 640 can be enabled through sysfs. Just write 1 to the "pec" file and PEC will be
641 enabled. Write 0 to that file to disable PEC a 641 enabled. Write 0 to that file to disable PEC again.
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