1 Kernel driver ltc2978
2 =====================
3
4 Supported chips:
5
6 * Linear Technology LTC2972
7
8 Prefix: 'ltc2972'
9
10 Addresses scanned: -
11
12 Datasheet: https://www.analog.com/en/produ
13
14 * Linear Technology LTC2974
15
16 Prefix: 'ltc2974'
17
18 Addresses scanned: -
19
20 Datasheet: https://www.analog.com/en/produ
21
22 * Linear Technology LTC2975
23
24 Prefix: 'ltc2975'
25
26 Addresses scanned: -
27
28 Datasheet: https://www.analog.com/en/produ
29
30 * Linear Technology LTC2977
31
32 Prefix: 'ltc2977'
33
34 Addresses scanned: -
35
36 Datasheet: https://www.analog.com/en/produ
37
38 * Linear Technology LTC2978, LTC2978A
39
40 Prefix: 'ltc2978'
41
42 Addresses scanned: -
43
44 Datasheet: https://www.analog.com/en/produ
45
46 https://www.analog.com/en/produ
47
48 * Linear Technology LTC2979
49
50 Prefix: 'ltc2979'
51
52 Addresses scanned: -
53
54 Datasheet: https://www.analog.com/en/produ
55
56 * Linear Technology LTC2980
57
58 Prefix: 'ltc2980'
59
60 Addresses scanned: -
61
62 Datasheet: https://www.analog.com/en/produ
63
64 * Linear Technology LTC3880
65
66 Prefix: 'ltc3880'
67
68 Addresses scanned: -
69
70 Datasheet: https://www.analog.com/en/produ
71
72 * Linear Technology LTC3882
73
74 Prefix: 'ltc3882'
75
76 Addresses scanned: -
77
78 Datasheet: https://www.analog.com/en/produ
79
80 * Linear Technology LTC3883
81
82 Prefix: 'ltc3883'
83
84 Addresses scanned: -
85
86 Datasheet: https://www.analog.com/en/produ
87
88 * Linear Technology LTC3884
89
90 Prefix: 'ltc3884'
91
92 Addresses scanned: -
93
94 Datasheet: https://www.analog.com/en/produ
95
96 * Linear Technology LTC3886
97
98 Prefix: 'ltc3886'
99
100 Addresses scanned: -
101
102 Datasheet: https://www.analog.com/en/produ
103
104 * Linear Technology LTC3887
105
106 Prefix: 'ltc3887'
107
108 Addresses scanned: -
109
110 Datasheet: https://www.analog.com/en/produ
111
112 * Linear Technology LTC3889
113
114 Prefix: 'ltc3889'
115
116 Addresses scanned: -
117
118 Datasheet: https://www.analog.com/en/produ
119
120 * Linear Technology LTC7880
121
122 Prefix: 'ltc7880'
123
124 Addresses scanned: -
125
126 Datasheet: https://www.analog.com/en/produ
127
128 * Linear Technology LTM2987
129
130 Prefix: 'ltm2987'
131
132 Addresses scanned: -
133
134 Datasheet: https://www.analog.com/en/produ
135
136 * Linear Technology LTM4644
137
138 Prefix: 'ltm4644'
139
140 Addresses scanned: -
141
142 Datasheet: https://www.analog.com/en/produ
143
144 * Linear Technology LTM4675
145
146 Prefix: 'ltm4675'
147
148 Addresses scanned: -
149
150 Datasheet: https://www.analog.com/en/produ
151
152 * Linear Technology LTM4676
153
154 Prefix: 'ltm4676'
155
156 Addresses scanned: -
157
158 Datasheet: https://www.analog.com/en/produ
159
160 * Linear Technology LTM4677
161
162 Prefix: 'ltm4677'
163
164 Addresses scanned: -
165
166 Datasheet: https://www.analog.com/en/produ
167
168 * Linear Technology LTM4678
169
170 Prefix: 'ltm4678'
171
172 Addresses scanned: -
173
174 Datasheet: https://www.analog.com/en/produ
175
176 * Analog Devices LTM4680
177
178 Prefix: 'ltm4680'
179
180 Addresses scanned: -
181
182 Datasheet: https://www.analog.com/ltm4680
183
184 * Analog Devices LTM4686
185
186 Prefix: 'ltm4686'
187
188 Addresses scanned: -
189
190 Datasheet: https://www.analog.com/ltm4686
191
192 * Analog Devices LTM4700
193
194 Prefix: 'ltm4700'
195
196 Addresses scanned: -
197
198 Datasheet: https://www.analog.com/ltm4700
199
200
201
202 Author: Guenter Roeck <linux@roeck-us.net>
203
204
205 Description
206 -----------
207
208 - LTC2974 and LTC2975 are quad digital power s
209 - LTC2978 is an octal power supply monitor.
210 - LTC2977 is a pin compatible replacement for
211 - LTC2980 is a 16-channel Power System Manager
212 - in a single die. The chip is instantiated an
213 - on two different I2C bus addresses.
214 - LTC3880, LTC3882, LTC3886, and LTC3887 are d
215 - DC/DC controllers.
216 - LTC3883 is a single phase step-down DC/DC co
217 - LTM2987 is a 16-channel Power System Manager
218 - additional components on a single die. The c
219 - as two separate chips on two different I2C b
220 - LTM4675 is a dual 9A or single 18A μModule
221 - LTM4676 is a dual 13A or single 26A uModule
222 - LTM4686 is a dual 10A or single 20A uModule
223
224
225 Usage Notes
226 -----------
227
228 This driver does not probe for PMBus devices.
229 devices explicitly.
230
231 Example: the following commands will load the
232 0x60 on I2C bus #1::
233
234 # modprobe ltc2978
235 # echo ltc2978 0x60 > /sys/bus/i2c/dev
236
237
238 Sysfs attributes
239 ----------------
240
241 ======================= ======================
242 in1_label "vin"
243
244 in1_input Measured input voltage
245
246 in1_min Minimum input voltage.
247
248 in1_max Maximum input voltage.
249
250 LTC2974, LTC2975, LTC2
251 LTC2979 and LTM2987 on
252
253 in1_lcrit Critical minimum input
254
255 LTC2972, LTC2974, LTC2
256 LTC2979 and LTM2987 on
257
258 in1_crit Critical maximum input
259
260 in1_min_alarm Input voltage low alar
261
262 in1_max_alarm Input voltage high ala
263
264 LTC2972, LTC2974, LTC2
265 LTC2979 and LTM2987 on
266
267 in1_lcrit_alarm Input voltage critical
268
269 LTC2972, LTC2974, LTC2
270 LTC2979 and LTM2987 on
271
272 in1_crit_alarm Input voltage critical
273
274 in1_lowest Lowest input voltage.
275
276 LTC2972, LTC2974, LTC2
277 and LTM2987 only.
278
279 in1_highest Highest input voltage.
280
281 in1_reset_history Reset input voltage hi
282
283 in[N]_label "vout[1-8]".
284
285 - LTC2972: N=2-3
286 - LTC2974, LTC2975: N=
287 - LTC2977, LTC2979, LT
288 - LTC2978: N=2-9
289 - LTC3880, LTC3882, LT
290 LTC7880, LTM4644, LT
291 LTM4680, LTM4700: N=
292 - LTC3883: N=2
293
294 in[N]_input Measured output voltag
295
296 in[N]_min Minimum output voltage
297
298 in[N]_max Maximum output voltage
299
300 in[N]_lcrit Critical minimum outpu
301
302 in[N]_crit Critical maximum outpu
303
304 in[N]_min_alarm Output voltage low ala
305
306 in[N]_max_alarm Output voltage high al
307
308 in[N]_lcrit_alarm Output voltage critica
309
310 in[N]_crit_alarm Output voltage critica
311
312 in[N]_lowest Lowest output voltage.
313
314 LTC2972, LTC2974, LTC2
315
316 in[N]_highest Highest output voltage
317
318 in[N]_reset_history Reset output voltage h
319
320 temp[N]_input Measured temperature.
321
322 - On LTC2972, temp[1-2
323 and temp 3 reports t
324 - On LTC2974 and LTC29
325 temperatures, and te
326 - On LTC2977, LTC2979,
327 only one temperature
328 reports the chip tem
329 - On LTC3880, LTC3882,
330 LTM4664, LTM4675, LT
331 and LTM4700, temp1 a
332 temperatures, and te
333 - On LTC3883, temp1 re
334 and temp2 reports th
335
336 temp[N]_min Minimum temperature.
337
338 LTC2972, LTC2974, LCT2
339 LTC2979, and LTM2987 o
340
341 temp[N]_max Maximum temperature.
342
343 temp[N]_lcrit Critical low temperatu
344
345 temp[N]_crit Critical high temperat
346
347 temp[N]_min_alarm Temperature low alarm.
348
349 LTC2972, LTC2974, LTC2
350 LTC2979, and LTM2987 o
351
352 temp[N]_max_alarm Temperature high alarm
353
354
355 temp[N]_lcrit_alarm Temperature critical l
356
357 temp[N]_crit_alarm Temperature critical h
358
359 temp[N]_lowest Lowest measured temper
360
361 - LTC2972, LTC2974, LT
362 LTC2979, and LTM2987
363 - Not supported for ch
364 and LTC2975.
365
366 temp[N]_highest Highest measured tempe
367
368 Not supported for chip
369 LTC2974 and LTC2975.
370
371 temp[N]_reset_history Reset temperature hist
372
373 Not supported for chip
374 LTC2974 and LTC2975.
375
376 power1_label "pin". LTC3883 and LTC
377
378 power1_input Measured input power.
379
380 power[N]_label "pout[1-4]".
381
382 - LTC2972: N=1-2
383 - LTC2974, LTC2975: N=
384 - LTC2977, LTC2979, LT
385 - LTC2978: Not support
386 - LTC3880, LTC3882, LT
387 LTM4664, LTM4675, LT
388 LTM4700: N=1-2
389 - LTC3883: N=2
390
391 power[N]_input Measured output power.
392
393 curr1_label "iin".
394
395 LTC3880, LTC3883, LTC3
396 LTM4644, LTM4675, LTM4
397 and LTM4700 only.
398
399 curr1_input Measured input current
400
401 curr1_max Maximum input current.
402
403 curr1_max_alarm Input current high ala
404
405 curr1_highest Highest input current.
406
407 LTC3883 and LTC3886 on
408
409 curr1_reset_history Reset input current hi
410
411 LTC3883 and LTC3886 on
412
413 curr[N]_label "iout[1-4]".
414
415 - LTC2972: N-1-2
416 - LTC2974, LTC2975: N=
417 - LTC2977, LTC2979, LT
418 - LTC2978: not support
419 - LTC3880, LTC3882, LT
420 LTM4664, LTM4675, LT
421 LTM4700: N=2-3
422 - LTC3883: N=2
423
424 curr[N]_input Measured output curren
425
426 curr[N]_max Maximum output current
427
428 curr[N]_crit Critical high output c
429
430 curr[N]_lcrit Critical low output cu
431
432 LTC2972, LTC2974 and L
433
434 curr[N]_max_alarm Output current high al
435
436 curr[N]_crit_alarm Output current critica
437
438 curr[N]_lcrit_alarm Output current critica
439
440 LTC2972, LTC2974 and L
441
442 curr[N]_lowest Lowest output current.
443
444 LTC2972, LTC2974 and L
445
446 curr[N]_highest Highest output current
447
448 curr[N]_reset_history Reset output current h
449 ======================= ======================
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.