This driver adds support for Linear Technology LTC4261 I2C Negative
Voltage Hot Swap Controller.
Reviewed-by: NIra W. Snyder <iws@ovro.caltech.edu>
Reviewed-by: NTom Grennan <tom.grennan@ericsson.com>
Signed-off-by: NGuenter Roeck <guenter.roeck@ericsson.com>