Kernel driver stef48h28

Supported chips:

Author:

Description

The STEF48H28 is a 30 A integrated e-fuse for 9-80 V DC power rails. It provides inrush control, undervoltage/overvoltage lockout and overcurrent protection using an adaptive (I x t) scheme that permits short high-current pulses typical of CPU/GPU loads.

The device offers an analog current-monitor output and an on-chip temperature-monitor signal for system supervision. Startup behavior is programmable through insertion-delay and soft-start settings.

Additional features include power-good indication, self-diagnostics, thermal shutdown and a PMBus interface for telemetry and status reporting.

Platform data support

The driver supports standard PMBus driver platform data.

Sysfs entries

in1_label

“vin”.

in1_input

Measured voltage. From READ_VIN register.

in1_min

Minimum Voltage. From VIN_UV_WARN_LIMIT register.

in1_max

Maximum voltage. From VIN_OV_WARN_LIMIT register.

in2_label

“vout1”.

in2_input

Measured voltage. From READ_VOUT register.

in2_min

Minimum Voltage. From VOUT_UV_WARN_LIMIT register.

in2_max

Maximum voltage. From VOUT_OV_WARN_LIMIT register.

curr1_label “iin”.

curr1_input Measured current. From READ_IIN register.

curr2_label “iout1”.

curr2_input Measured current. From READ_IOUT register.

power1_label

“pin”

power1_input

Measured input power. From READ_PIN register.

power2_label

“pout1”

power2_input

Measured output power. From READ_POUT register.

temp1_input

Measured temperature. From READ_TEMPERATURE_1 register.

temp1_max

Maximum temperature. From OT_WARN_LIMIT register.

temp1_crit

Critical high temperature. From OT_FAULT_LIMIT register.

temp2_input

Measured temperature. From READ_TEMPERATURE_2 register.