1.. SPDX-License-Identifier: GPL-2.0 2 3Kernel driver stef48h28 4======================= 5 6Supported chips: 7 8 * Analog Devices STEF48H28 9 10 Prefix: 'stef48h28' 11 12 Addresses scanned: - 13 14 Datasheet: https://www.st.com/resource/en/data_brief/stef48h28.pdf 15 16Author: 17 18 - Charles Hsu <hsu.yungteng@gmail.com> 19 20 21Description 22----------- 23 24The STEF48H28 is a 30 A integrated e-fuse for 9-80 V DC power rails. 25It provides inrush control, undervoltage/overvoltage lockout and 26overcurrent protection using an adaptive (I x t) scheme that permits 27short high-current pulses typical of CPU/GPU loads. 28 29The device offers an analog current-monitor output and an on-chip 30temperature-monitor signal for system supervision. Startup behavior is 31programmable through insertion-delay and soft-start settings. 32 33Additional features include power-good indication, self-diagnostics, 34thermal shutdown and a PMBus interface for telemetry and status 35reporting. 36 37Platform data support 38--------------------- 39 40The driver supports standard PMBus driver platform data. 41 42Sysfs entries 43------------- 44 45====================== ======================================================== 46in1_label "vin". 47in1_input Measured voltage. From READ_VIN register. 48in1_min Minimum Voltage. From VIN_UV_WARN_LIMIT register. 49in1_max Maximum voltage. From VIN_OV_WARN_LIMIT register. 50 51in2_label "vout1". 52in2_input Measured voltage. From READ_VOUT register. 53in2_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register. 54in2_max Maximum voltage. From VOUT_OV_WARN_LIMIT register. 55 56curr1_label "iin". curr1_input Measured current. From READ_IIN register. 57 58curr2_label "iout1". curr2_input Measured current. From READ_IOUT register. 59 60power1_label "pin" 61power1_input Measured input power. From READ_PIN register. 62 63power2_label "pout1" 64power2_input Measured output power. From READ_POUT register. 65 66temp1_input Measured temperature. From READ_TEMPERATURE_1 register. 67temp1_max Maximum temperature. From OT_WARN_LIMIT register. 68temp1_crit Critical high temperature. From OT_FAULT_LIMIT register. 69 70temp2_input Measured temperature. From READ_TEMPERATURE_2 register. 71====================== ======================================================== 72