Documentation/hwmon/ltc4282.rst

1 .. SPDX-License-Identifier: GPL-2.0-only
12     Addresses scanned: - I2C 0x40 - 0x5A (7-bit)
13     Addresses scanned: - I2C 0x80 - 0xB4 with a step of 2 (8-bit)
17         https://www.analog.com/media/en/technical-documentation/data-sheets/ltc4282.pdf
25 from a live backplane. Using one or more external N-channel pass transistors,
26 board supply voltage and inrush current are ramped up at an adjustable rate. An
27 I2C interface and onboard ADC allows for monitoring of board current, voltage,
28 power, energy and fault status. The device features analog foldback current
31 parallel MOSFETs or support a 2-stage start-up that first charges the load
32 capacitance followed by enabling a low on-resistance path to the load. The
34 capability and accurate current limiting reduce the extremes in which both loads
35 and power supplies must safely operate. Non-volatile configuration allows for
41 The following attributes are supported. Limits are read-write and all the other
42 attributes are read-only. Note that in0 and in1 are mutually exclusive. Enabling
55 in0_enable		Enable/Disable VSOURCE monitoring
65 			Also clears over/undervoltage fault logs.
70 in1_enable		Enable/Disable VDD monitoring
83 curr1_input		Sense current (mA)
86 curr1_lowest		Lowest measured current
87 curr1_highest		Highest measured current
106 energy1_input		Measured energy over time (in microJoule)
107 energy1_enable		Enable/Disable Energy accumulation
123 ``/sys/kernel/debug/ltc4282-hwmon[X]/``
128 in0_fet_short_fault_log	 Set to 1 when the ADC detects a FET-short fault.
129 in0_fet_bad_fault_log    Set to 1 when a FET-BAD fault occurs.