Documentation/hwmon/ltc2978.rst

1 .. SPDX-License-Identifier: GPL-2.0
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236 Author: Guenter Roeck <linux@roeck-us.net>
240 -----------
242 - LT7170 and LT7171 are 20 A, 16 V, single- or dual-phase Silent Switcher
243 - step-down regulators with Digital Power System Management.
244 - LTC2974 and LTC2975 are quad digital power supply managers.
245 - LTC2978 is an octal power supply monitor.
246 - LTC2977 is a pin compatible replacement for LTC2978.
247 - LTC2980 is a 16-channel Power System Manager, consisting of two LTC2977
248 - in a single die. The chip is instantiated and reported as two separate chips
249 - on two different I2C bus addresses.
250 - LTC3880, LTC3882, LTC3886, and LTC3887 are dual output poly-phase step-down
251 - DC/DC controllers.
252 - LTC3883 is a single phase step-down DC/DC controller.
253 - LTM2987 is a 16-channel Power System Manager with two LTC2977 plus
254 - additional components on a single die. The chip is instantiated and reported
255 - as two separate chips on two different I2C bus addresses.
256 - LTM4675 is a dual 9A or single 18A μModule regulator
257 - LTM4676 is a dual 13A or single 26A uModule regulator.
258 - LTM4686 is a dual 10A or single 20A uModule regulator.
262 -----------
271 	# echo ltc2978 0x60 > /sys/bus/i2c/devices/i2c-1/new_device
275 ----------------
298 in1_max_alarm		Input voltage high alarm.
308 in1_crit_alarm		Input voltage critical high alarm.
319 in[N]_label		"vout[1-8]".
321 			- LT7170, LT7171: N=2
322 			- LTC2972: N=2-3
323 			- LTC2974, LTC2975: N=2-5
324 			- LTC2977, LTC2979, LTC2980, LTM2987: N=2-9
325 			- LTC2978: N=2-9
326 			- LTC3880, LTC3882, LTC3884, LTC23886 LTC3887, LTC3889,
328 			  LTM4680, LTM4700: N=2-3
329 			- LTC3883: N=2
330 			- LTC7841: N=2
332 in[N]_input		Measured output voltage.
334 in[N]_min		Minimum output voltage.
336 in[N]_max		Maximum output voltage.
338 in[N]_lcrit		Critical minimum output voltage.
340 in[N]_crit		Critical maximum output voltage.
342 in[N]_min_alarm		Output voltage low alarm.
344 in[N]_max_alarm		Output voltage high alarm.
346 in[N]_lcrit_alarm	Output voltage critical low alarm.
348 in[N]_crit_alarm	Output voltage critical high alarm.
350 in[N]_lowest		Lowest output voltage.
354 in[N]_highest		Highest output voltage.
356 in[N]_reset_history	Reset output voltage history.
360 			- On LT7170 and LT7171, temp1 reports the chip
362 			- On LTC2972, temp[1-2] report external temperatures,
364 			- On LTC2974 and LTC2975, temp[1-4] report external
366 			- On LTC2977, LTC2979, LTC2980, LTC2978, and LTM2987,
369 			- On LTC3880, LTC3882, LTC3886, LTC3887, LTC3889,
373 			- On LTC3883, temp1 reports an external temperature,
385 temp[N]_crit		Critical high temperature.
392 temp[N]_max_alarm	Temperature high alarm.
397 temp[N]_crit_alarm	Temperature critical high alarm.
401 			- LTC2972, LTC2974, LTC2975, LTC2977, LTM2980, LTC2978,
403 			- Not supported for chip temperature sensor on LTC2974
420 power[N]_label		"pout[1-4]".
422 			- LTC2972: N=1-2
423 			- LTC2974, LTC2975: N=1-4
424 			- LTC2977, LTC2979, LTC2980, LTM2987: Not supported
425 			- LTC2978: Not supported
426 			- LTC3880, LTC3882, LTC3884, LTC3886, LTC3887, LTC3889,
428 			  LTM4700: N=1-2
429 			- LTC3883: N=2
431 power[N]_input		Measured output power.
443 curr1_max_alarm		Input current high alarm.
453 curr[N]_label		"iout[1-4]".
455 			- LT7170, LT7171: N=1
456 			- LTC2972: N-1-2
457 			- LTC2974, LTC2975: N=1-4
458 			- LTC2977, LTC2979, LTC2980, LTM2987: not supported
459 			- LTC2978: not supported
460 			- LTC3880, LTC3882, LTC3884, LTC3886, LTC3887, LTC3889,
462 			  LTM4700: N=2-3
463 			- LTC3883: N=2
464 			- LTC7841: N=2
466 curr[N]_input		Measured output current.
468 curr[N]_max		Maximum output current.
470 curr[N]_crit		Critical high output current.
472 curr[N]_lcrit		Critical low output current.
476 curr[N]_max_alarm	Output current high alarm.
478 curr[N]_crit_alarm	Output current critical high alarm.
480 curr[N]_lcrit_alarm	Output current critical low alarm.
484 curr[N]_lowest		Lowest output current.
488 curr[N]_highest		Highest output current.
490 curr[N]_reset_history	Reset output current history.