| .. SPDX-License-Identifier: GPL-2.0 |
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| Kernel driver stef48h28 |
| ======================= |
| |
| Supported chips: |
| |
| * Analog Devices STEF48H28 |
| |
| Prefix: 'stef48h28' |
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| Addresses scanned: - |
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| Datasheet: https://www.st.com/resource/en/data_brief/stef48h28.pdf |
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| Author: |
| |
| - Charles Hsu <hsu.yungteng@gmail.com> |
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| |
| 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. |
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| power1_label "pin" |
| power1_input Measured input power. From READ_PIN register. |
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| power2_label "pout1" |
| power2_input Measured output power. From READ_POUT register. |
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| 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. |
| ====================== ======================================================== |
