Documentation/hwmon/ltc4286.rst

Source file repositories/reference/linux-study-clean/Documentation/hwmon/ltc4286.rst

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Documentation/hwmon/ltc4286.rst
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Support Tooling And Documentation
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Support Tooling And Documentation: documentation
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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.

Annotation

Implementation Notes