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