1 Kernel driver ltc2978 1 Kernel driver ltc2978
2 ===================== 2 =====================
3 3
4 Supported chips: 4 Supported chips:
5 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 6 * Linear Technology LTC2974
15 7
16 Prefix: 'ltc2974' 8 Prefix: 'ltc2974'
17 9
18 Addresses scanned: - 10 Addresses scanned: -
19 11
20 Datasheet: https://www.analog.com/en/produ !! 12 Datasheet: http://www.linear.com/product/ltc2974
21 13
22 * Linear Technology LTC2975 14 * Linear Technology LTC2975
23 15
24 Prefix: 'ltc2975' 16 Prefix: 'ltc2975'
25 17
26 Addresses scanned: - 18 Addresses scanned: -
27 19
28 Datasheet: https://www.analog.com/en/produ !! 20 Datasheet: http://www.linear.com/product/ltc2975
29 21
30 * Linear Technology LTC2977 22 * Linear Technology LTC2977
31 23
32 Prefix: 'ltc2977' 24 Prefix: 'ltc2977'
33 25
34 Addresses scanned: - 26 Addresses scanned: -
35 27
36 Datasheet: https://www.analog.com/en/produ !! 28 Datasheet: http://www.linear.com/product/ltc2977
37 29
38 * Linear Technology LTC2978, LTC2978A 30 * Linear Technology LTC2978, LTC2978A
39 31
40 Prefix: 'ltc2978' 32 Prefix: 'ltc2978'
41 33
42 Addresses scanned: - 34 Addresses scanned: -
43 35
44 Datasheet: https://www.analog.com/en/produ !! 36 Datasheet: http://www.linear.com/product/ltc2978
45 <<
46 https://www.analog.com/en/produ <<
47 <<
48 * Linear Technology LTC2979 <<
49 37
50 Prefix: 'ltc2979' !! 38 http://www.linear.com/product/ltc2978a
51 <<
52 Addresses scanned: - <<
53 <<
54 Datasheet: https://www.analog.com/en/produ <<
55 39
56 * Linear Technology LTC2980 40 * Linear Technology LTC2980
57 41
58 Prefix: 'ltc2980' 42 Prefix: 'ltc2980'
59 43
60 Addresses scanned: - 44 Addresses scanned: -
61 45
62 Datasheet: https://www.analog.com/en/produ !! 46 Datasheet: http://www.linear.com/product/ltc2980
63 47
64 * Linear Technology LTC3880 48 * Linear Technology LTC3880
65 49
66 Prefix: 'ltc3880' 50 Prefix: 'ltc3880'
67 51
68 Addresses scanned: - 52 Addresses scanned: -
69 53
70 Datasheet: https://www.analog.com/en/produ !! 54 Datasheet: http://www.linear.com/product/ltc3880
71 55
72 * Linear Technology LTC3882 56 * Linear Technology LTC3882
73 57
74 Prefix: 'ltc3882' 58 Prefix: 'ltc3882'
75 59
76 Addresses scanned: - 60 Addresses scanned: -
77 61
78 Datasheet: https://www.analog.com/en/produ !! 62 Datasheet: http://www.linear.com/product/ltc3882
79 63
80 * Linear Technology LTC3883 64 * Linear Technology LTC3883
81 65
82 Prefix: 'ltc3883' 66 Prefix: 'ltc3883'
83 67
84 Addresses scanned: - 68 Addresses scanned: -
85 69
86 Datasheet: https://www.analog.com/en/produ !! 70 Datasheet: http://www.linear.com/product/ltc3883
87 <<
88 * Linear Technology LTC3884 <<
89 <<
90 Prefix: 'ltc3884' <<
91 <<
92 Addresses scanned: - <<
93 <<
94 Datasheet: https://www.analog.com/en/produ <<
95 71
96 * Linear Technology LTC3886 72 * Linear Technology LTC3886
97 73
98 Prefix: 'ltc3886' 74 Prefix: 'ltc3886'
99 75
100 Addresses scanned: - 76 Addresses scanned: -
101 77
102 Datasheet: https://www.analog.com/en/produ !! 78 Datasheet: http://www.linear.com/product/ltc3886
103 79
104 * Linear Technology LTC3887 80 * Linear Technology LTC3887
105 81
106 Prefix: 'ltc3887' 82 Prefix: 'ltc3887'
107 83
108 Addresses scanned: - 84 Addresses scanned: -
109 85
110 Datasheet: https://www.analog.com/en/produ !! 86 Datasheet: http://www.linear.com/product/ltc3887
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 87
128 * Linear Technology LTM2987 88 * Linear Technology LTM2987
129 89
130 Prefix: 'ltm2987' 90 Prefix: 'ltm2987'
131 91
132 Addresses scanned: - 92 Addresses scanned: -
133 93
134 Datasheet: https://www.analog.com/en/produ !! 94 Datasheet: http://www.linear.com/product/ltm2987
135 95
136 * Linear Technology LTM4644 !! 96 * Linear Technology LTM4675
137 <<
138 Prefix: 'ltm4644' <<
139 <<
140 Addresses scanned: - <<
141 <<
142 Datasheet: https://www.analog.com/en/produ <<
143 <<
144 * Linear Technology LTM4675 <<
145 97
146 Prefix: 'ltm4675' 98 Prefix: 'ltm4675'
147 99
148 Addresses scanned: - 100 Addresses scanned: -
149 101
150 Datasheet: https://www.analog.com/en/produ !! 102 Datasheet: http://www.linear.com/product/ltm4675
151 103
152 * Linear Technology LTM4676 104 * Linear Technology LTM4676
153 105
154 Prefix: 'ltm4676' 106 Prefix: 'ltm4676'
155 107
156 Addresses scanned: - 108 Addresses scanned: -
157 109
158 Datasheet: https://www.analog.com/en/produ !! 110 Datasheet: http://www.linear.com/product/ltm4676
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 <<
183 111
184 * Analog Devices LTM4686 112 * Analog Devices LTM4686
185 113
186 Prefix: 'ltm4686' 114 Prefix: 'ltm4686'
187 115
188 Addresses scanned: - 116 Addresses scanned: -
189 117
190 Datasheet: https://www.analog.com/ltm4686 !! 118 Datasheet: http://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 <<
200 119
201 120
202 Author: Guenter Roeck <linux@roeck-us.net> 121 Author: Guenter Roeck <linux@roeck-us.net>
203 122
204 123
205 Description 124 Description
206 ----------- 125 -----------
207 126
208 - LTC2974 and LTC2975 are quad digital power s 127 - LTC2974 and LTC2975 are quad digital power supply managers.
209 - LTC2978 is an octal power supply monitor. 128 - LTC2978 is an octal power supply monitor.
210 - LTC2977 is a pin compatible replacement for 129 - LTC2977 is a pin compatible replacement for LTC2978.
211 - LTC2980 is a 16-channel Power System Manager 130 - LTC2980 is a 16-channel Power System Manager, consisting of two LTC2977
212 - in a single die. The chip is instantiated an 131 - in a single die. The chip is instantiated and reported as two separate chips
213 - on two different I2C bus addresses. 132 - on two different I2C bus addresses.
214 - LTC3880, LTC3882, LTC3886, and LTC3887 are d 133 - LTC3880, LTC3882, LTC3886, and LTC3887 are dual output poly-phase step-down
215 - DC/DC controllers. 134 - DC/DC controllers.
216 - LTC3883 is a single phase step-down DC/DC co 135 - LTC3883 is a single phase step-down DC/DC controller.
217 - LTM2987 is a 16-channel Power System Manager 136 - LTM2987 is a 16-channel Power System Manager with two LTC2977 plus
218 - additional components on a single die. The c 137 - additional components on a single die. The chip is instantiated and reported
219 - as two separate chips on two different I2C b 138 - as two separate chips on two different I2C bus addresses.
220 - LTM4675 is a dual 9A or single 18A μModule 139 - LTM4675 is a dual 9A or single 18A μModule regulator
221 - LTM4676 is a dual 13A or single 26A uModule 140 - LTM4676 is a dual 13A or single 26A uModule regulator.
222 - LTM4686 is a dual 10A or single 20A uModule 141 - LTM4686 is a dual 10A or single 20A uModule regulator.
223 142
224 143
225 Usage Notes 144 Usage Notes
226 ----------- 145 -----------
227 146
228 This driver does not probe for PMBus devices. 147 This driver does not probe for PMBus devices. You will have to instantiate
229 devices explicitly. 148 devices explicitly.
230 149
231 Example: the following commands will load the 150 Example: the following commands will load the driver for an LTC2978 at address
232 0x60 on I2C bus #1:: 151 0x60 on I2C bus #1::
233 152
234 # modprobe ltc2978 153 # modprobe ltc2978
235 # echo ltc2978 0x60 > /sys/bus/i2c/dev 154 # echo ltc2978 0x60 > /sys/bus/i2c/devices/i2c-1/new_device
236 155
237 156
238 Sysfs attributes 157 Sysfs attributes
239 ---------------- 158 ----------------
240 159
241 ======================= ====================== 160 ======================= ========================================================
242 in1_label "vin" 161 in1_label "vin"
243 162
244 in1_input Measured input voltage 163 in1_input Measured input voltage.
245 164
246 in1_min Minimum input voltage. 165 in1_min Minimum input voltage.
247 166
248 in1_max Maximum input voltage. 167 in1_max Maximum input voltage.
249 168
250 LTC2974, LTC2975, LTC2 !! 169 LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
251 LTC2979 and LTM2987 on !! 170 LTM2987 only.
252 171
253 in1_lcrit Critical minimum input 172 in1_lcrit Critical minimum input voltage.
254 173
255 LTC2972, LTC2974, LTC2 !! 174 LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
256 LTC2979 and LTM2987 on !! 175 LTM2987 only.
257 176
258 in1_crit Critical maximum input 177 in1_crit Critical maximum input voltage.
259 178
260 in1_min_alarm Input voltage low alar 179 in1_min_alarm Input voltage low alarm.
261 180
262 in1_max_alarm Input voltage high ala 181 in1_max_alarm Input voltage high alarm.
263 182
264 LTC2972, LTC2974, LTC2 !! 183 LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
265 LTC2979 and LTM2987 on !! 184 LTM2987 only.
266 <<
267 in1_lcrit_alarm Input voltage critical 185 in1_lcrit_alarm Input voltage critical low alarm.
268 186
269 LTC2972, LTC2974, LTC2 !! 187 LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
270 LTC2979 and LTM2987 on !! 188 LTM2987 only.
271 <<
272 in1_crit_alarm Input voltage critical 189 in1_crit_alarm Input voltage critical high alarm.
273 190
274 in1_lowest Lowest input voltage. 191 in1_lowest Lowest input voltage.
275 192
276 LTC2972, LTC2974, LTC2 !! 193 LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
277 and LTM2987 only. !! 194 LTM2987 only.
278 <<
279 in1_highest Highest input voltage. 195 in1_highest Highest input voltage.
280 196
281 in1_reset_history Reset input voltage hi 197 in1_reset_history Reset input voltage history.
282 198
283 in[N]_label "vout[1-8]". 199 in[N]_label "vout[1-8]".
284 200
285 - LTC2972: N=2-3 <<
286 - LTC2974, LTC2975: N= 201 - LTC2974, LTC2975: N=2-5
287 - LTC2977, LTC2979, LT !! 202 - LTC2977, LTC2980, LTM2987: N=2-9
288 - LTC2978: N=2-9 203 - LTC2978: N=2-9
289 - LTC3880, LTC3882, LT !! 204 - LTC3880, LTC3882, LTC23886 LTC3887, LTM4675, LTM4676:
290 LTC7880, LTM4644, LT !! 205 N=2-3
291 LTM4680, LTM4700: N= <<
292 - LTC3883: N=2 206 - LTC3883: N=2
293 207
294 in[N]_input Measured output voltag 208 in[N]_input Measured output voltage.
295 209
296 in[N]_min Minimum output voltage 210 in[N]_min Minimum output voltage.
297 211
298 in[N]_max Maximum output voltage 212 in[N]_max Maximum output voltage.
299 213
300 in[N]_lcrit Critical minimum outpu 214 in[N]_lcrit Critical minimum output voltage.
301 215
302 in[N]_crit Critical maximum outpu 216 in[N]_crit Critical maximum output voltage.
303 217
304 in[N]_min_alarm Output voltage low ala 218 in[N]_min_alarm Output voltage low alarm.
305 219
306 in[N]_max_alarm Output voltage high al 220 in[N]_max_alarm Output voltage high alarm.
307 221
308 in[N]_lcrit_alarm Output voltage critica 222 in[N]_lcrit_alarm Output voltage critical low alarm.
309 223
310 in[N]_crit_alarm Output voltage critica 224 in[N]_crit_alarm Output voltage critical high alarm.
311 225
312 in[N]_lowest Lowest output voltage. 226 in[N]_lowest Lowest output voltage.
313 227
314 LTC2972, LTC2974, LTC2 !! 228
>> 229 LTC2974, LTC2975,and LTC2978 only.
315 230
316 in[N]_highest Highest output voltage 231 in[N]_highest Highest output voltage.
317 232
318 in[N]_reset_history Reset output voltage h 233 in[N]_reset_history Reset output voltage history.
319 234
320 temp[N]_input Measured temperature. 235 temp[N]_input Measured temperature.
321 236
322 - On LTC2972, temp[1-2 <<
323 and temp 3 reports t <<
324 - On LTC2974 and LTC29 237 - On LTC2974 and LTC2975, temp[1-4] report external
325 temperatures, and te 238 temperatures, and temp5 reports the chip temperature.
326 - On LTC2977, LTC2979, !! 239 - On LTC2977, LTC2980, LTC2978, and LTM2987, only one
327 only one temperature !! 240 temperature measurement is supported and reports
328 reports the chip tem !! 241 the chip temperature.
329 - On LTC3880, LTC3882, !! 242 - On LTC3880, LTC3882, LTC3887, LTM4675, and LTM4676,
330 LTM4664, LTM4675, LT !! 243 temp1 and temp2 report external temperatures, and
331 and LTM4700, temp1 a !! 244 temp3 reports the chip temperature.
332 temperatures, and te <<
333 - On LTC3883, temp1 re 245 - On LTC3883, temp1 reports an external temperature,
334 and temp2 reports th 246 and temp2 reports the chip temperature.
335 247
336 temp[N]_min Minimum temperature. !! 248 temp[N]_min Mimimum temperature.
337 249
338 LTC2972, LTC2974, LCT2 !! 250 LTC2974, LCT2977, LTM2980, LTC2978, and LTM2987 only.
339 LTC2979, and LTM2987 o <<
340 251
341 temp[N]_max Maximum temperature. 252 temp[N]_max Maximum temperature.
342 253
343 temp[N]_lcrit Critical low temperatu 254 temp[N]_lcrit Critical low temperature.
344 255
345 temp[N]_crit Critical high temperat 256 temp[N]_crit Critical high temperature.
346 257
347 temp[N]_min_alarm Temperature low alarm. 258 temp[N]_min_alarm Temperature low alarm.
348 259
349 LTC2972, LTC2974, LTC2 !! 260 LTC2974, LTC2975, LTC2977, LTM2980, LTC2978, and
350 LTC2979, and LTM2987 o !! 261 LTM2987 only.
351 262
352 temp[N]_max_alarm Temperature high alarm 263 temp[N]_max_alarm Temperature high alarm.
353 264
354 265
355 temp[N]_lcrit_alarm Temperature critical l 266 temp[N]_lcrit_alarm Temperature critical low alarm.
356 267
357 temp[N]_crit_alarm Temperature critical h 268 temp[N]_crit_alarm Temperature critical high alarm.
358 269
359 temp[N]_lowest Lowest measured temper 270 temp[N]_lowest Lowest measured temperature.
360 271
361 - LTC2972, LTC2974, LT !! 272 - LTC2974, LTC2975, LTC2977, LTM2980, LTC2978, and
362 LTC2979, and LTM2987 !! 273 LTM2987 only.
363 - Not supported for ch 274 - Not supported for chip temperature sensor on LTC2974
364 and LTC2975. 275 and LTC2975.
365 276
366 temp[N]_highest Highest measured tempe 277 temp[N]_highest Highest measured temperature.
367 278
368 Not supported for chip 279 Not supported for chip temperature sensor on
369 LTC2974 and LTC2975. 280 LTC2974 and LTC2975.
370 281
371 temp[N]_reset_history Reset temperature hist 282 temp[N]_reset_history Reset temperature history.
372 283
373 Not supported for chip 284 Not supported for chip temperature sensor on
374 LTC2974 and LTC2975. 285 LTC2974 and LTC2975.
375 286
376 power1_label "pin". LTC3883 and LTC 287 power1_label "pin". LTC3883 and LTC3886 only.
377 288
378 power1_input Measured input power. 289 power1_input Measured input power.
379 290
380 power[N]_label "pout[1-4]". 291 power[N]_label "pout[1-4]".
381 292
382 - LTC2972: N=1-2 <<
383 - LTC2974, LTC2975: N= 293 - LTC2974, LTC2975: N=1-4
384 - LTC2977, LTC2979, LT !! 294 - LTC2977, LTC2980, LTM2987: Not supported
385 - LTC2978: Not support 295 - LTC2978: Not supported
386 - LTC3880, LTC3882, LT !! 296 - LTC3880, LTC3882, LTC3886, LTC3887, LTM4675, LTM4676:
387 LTM4664, LTM4675, LT !! 297 N=1-2
388 LTM4700: N=1-2 <<
389 - LTC3883: N=2 298 - LTC3883: N=2
390 299
391 power[N]_input Measured output power. 300 power[N]_input Measured output power.
392 301
393 curr1_label "iin". 302 curr1_label "iin".
394 303
395 LTC3880, LTC3883, LTC3 !! 304 LTC3880, LTC3883, LTC3886, LTC3887, LTM4675,
396 LTM4644, LTM4675, LTM4 !! 305 and LTM4676 only.
397 and LTM4700 only. <<
398 306
399 curr1_input Measured input current 307 curr1_input Measured input current.
400 308
401 curr1_max Maximum input current. 309 curr1_max Maximum input current.
402 310
403 curr1_max_alarm Input current high ala 311 curr1_max_alarm Input current high alarm.
404 312
405 curr1_highest Highest input current. 313 curr1_highest Highest input current.
406 314
407 LTC3883 and LTC3886 on 315 LTC3883 and LTC3886 only.
408 316
409 curr1_reset_history Reset input current hi 317 curr1_reset_history Reset input current history.
410 318
411 LTC3883 and LTC3886 on 319 LTC3883 and LTC3886 only.
412 320
413 curr[N]_label "iout[1-4]". 321 curr[N]_label "iout[1-4]".
414 322
415 - LTC2972: N-1-2 <<
416 - LTC2974, LTC2975: N= 323 - LTC2974, LTC2975: N=1-4
417 - LTC2977, LTC2979, LT !! 324 - LTC2977, LTC2980, LTM2987: not supported
418 - LTC2978: not support 325 - LTC2978: not supported
419 - LTC3880, LTC3882, LT !! 326 - LTC3880, LTC3882, LTC3886, LTC3887, LTM4675, LTM4676:
420 LTM4664, LTM4675, LT !! 327 N=2-3
421 LTM4700: N=2-3 <<
422 - LTC3883: N=2 328 - LTC3883: N=2
423 329
424 curr[N]_input Measured output curren 330 curr[N]_input Measured output current.
425 331
426 curr[N]_max Maximum output current 332 curr[N]_max Maximum output current.
427 333
428 curr[N]_crit Critical high output c 334 curr[N]_crit Critical high output current.
429 335
430 curr[N]_lcrit Critical low output cu 336 curr[N]_lcrit Critical low output current.
431 337
432 LTC2972, LTC2974 and L !! 338 LTC2974 and LTC2975 only.
433 339
434 curr[N]_max_alarm Output current high al 340 curr[N]_max_alarm Output current high alarm.
435 341
436 curr[N]_crit_alarm Output current critica 342 curr[N]_crit_alarm Output current critical high alarm.
437 343
438 curr[N]_lcrit_alarm Output current critica 344 curr[N]_lcrit_alarm Output current critical low alarm.
439 345
440 LTC2972, LTC2974 and L !! 346 LTC2974 and LTC2975 only.
441 347
442 curr[N]_lowest Lowest output current. 348 curr[N]_lowest Lowest output current.
443 349
444 LTC2972, LTC2974 and L !! 350 LTC2974 and LTC2975 only.
445 351
446 curr[N]_highest Highest output current 352 curr[N]_highest Highest output current.
447 353
448 curr[N]_reset_history Reset output current h 354 curr[N]_reset_history Reset output current history.
449 ======================= ====================== 355 ======================= ========================================================
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