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- .. 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.
- ======================= =======================================================
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