Kernel driver ltc4215¶
Supported chips:
Linear Technology LTC4215
Prefix: ‘ltc4215’
Addresses scanned: 0x44
Datasheet:
Author: Ira W. Snyder <iws@ovro.caltech.edu>
Description¶
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 |