Kernel driver ltc4215

Supported chips:

Author: Ira W. Snyder <>


The LTC4215 controller allows a board to be safely inserted and removed from a live backplane.

Usage Notes

This driver does not probe for LTC4215 devices, due to the fact that some of the possible addresses are unfriendly to probing. You will have to instantiate the devices explicitly.

Example: the following will load the driver for an LTC4215 at address 0x44 on I2C bus #0:

$ modprobe ltc4215
$ echo ltc4215 0x44 > /sys/bus/i2c/devices/i2c-0/new_device

Sysfs entries

The LTC4215 has built-in limits for overvoltage, undervoltage, and undercurrent warnings. This makes it very likely that the reference circuit will be used.

in1_input input voltage
in2_input output voltage
in1_min_alarm input undervoltage alarm
in1_max_alarm input overvoltage alarm
curr1_input current
curr1_max_alarm overcurrent alarm
power1_input power usage
power1_alarm power bad alarm