| .. SPDX-License-Identifier: GPL-2.0-or-later |
| |
| Kernel driver ltc4286 |
| ===================== |
| |
| Supported chips: |
| |
| * Analog Devices LTC4286 |
| |
| Prefix: 'ltc4286' |
| |
| Addresses scanned: - |
| |
| Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ltc4286.pdf |
| |
| * Analog Devices LTC4287 |
| |
| Prefix: 'ltc4287' |
| |
| Addresses scanned: - |
| |
| Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ltc4287.pdf |
| |
| Author: Delphine CC Chiu <Delphine_CC_Chiu@Wiwynn.com> |
| |
| |
| Description |
| ----------- |
| |
| This driver supports hardware monitoring for Analog Devices LTC4286 |
| and LTC4287 Hot-Swap Controller and Digital Power Monitors. |
| |
| LTC4286 and LTC4287 are hot-swap controllers that allow a circuit board |
| to be removed from or inserted into a live backplane. They also feature |
| current and voltage readback via an integrated 12 bit analog-to-digital |
| converter (ADC), accessed using a PMBus interface. |
| |
| The driver is a client driver to the core PMBus driver. Please see |
| Documentation/hwmon/pmbus.rst for details on PMBus client drivers. |
| |
| |
| Usage Notes |
| ----------- |
| |
| This driver does not auto-detect devices. You will have to instantiate the |
| devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for |
| details. |
| |
| The shunt value in micro-ohms can be set via device tree at compile-time. Please |
| refer to the Documentation/devicetree/bindings/hwmon/lltc,ltc4286.yaml for bindings |
| if the device tree is used. |
| |
| |
| Platform data support |
| --------------------- |
| |
| The driver supports standard PMBus driver platform data. Please see |
| Documentation/hwmon/pmbus.rst for details. |
| |
| |
| Sysfs entries |
| ------------- |
| |
| The following attributes are supported. Limits are read-write, history reset |
| attributes are write-only, all other attributes are read-only. |
| |
| ======================= ======================================================= |
| in1_label "vin" |
| in1_input Measured voltage. |
| in1_alarm Input voltage alarm. |
| in1_min Minimum input voltage. |
| in1_max Maximum input voltage. |
| |
| in2_label "vout1" |
| in2_input Measured voltage. |
| in2_alarm Output voltage alarm. |
| in2_min Minimum output voltage. |
| in2_max Maximum output voltage. |
| |
| curr1_label "iout1" |
| curr1_input Measured current. |
| curr1_alarm Output current alarm. |
| curr1_max Maximum current. |
| |
| power1_label "pin" |
| power1_input Input power. |
| power1_alarm Input power alarm. |
| power1_max Maximum poewr. |
| |
| temp1_input Chip temperature. |
| temp1_min Minimum chip temperature. |
| temp1_max Maximum chip temperature. |
| temp1_crit Critical chip temperature. |
| temp1_alarm Chip temperature alarm. |
| ======================= ======================================================= |
