Documentation/hwmon/ltc4215.rst

Source file repositories/reference/linux-study-clean/Documentation/hwmon/ltc4215.rst

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Linux kernel
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Documentation/hwmon/ltc4215.rst
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.rst
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Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: documentation
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atlas-only

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Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

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Annotated Snippet

Kernel driver ltc4215
=====================

Supported chips:

  * Linear Technology LTC4215

    Prefix: 'ltc4215'

    Addresses scanned: 0x44

    Datasheet:

	http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1006,C1163,P17572,D12697

Author: Ira W. Snyder <iws@ovro.caltech.edu>


Description
-----------

The LTC4215 controller allows a board to be safely inserted and removed
from a live backplane.


Usage Notes
-----------

This driver does not probe for LTC4215 devices, due to the fact that some
of the possible addresses are unfriendly to probing. You will have to
instantiate the devices explicitly.

Example: the following will load the driver for an LTC4215 at address 0x44
on I2C bus #0::

	$ modprobe ltc4215
	$ echo ltc4215 0x44 > /sys/bus/i2c/devices/i2c-0/new_device


Sysfs entries
-------------

The LTC4215 has built-in limits for overvoltage, undervoltage, and
undercurrent warnings. This makes it very likely that the reference
circuit will be used.

======================= =========================
in1_input		input voltage
in2_input		output voltage

in1_min_alarm		input undervoltage alarm
in1_max_alarm		input overvoltage alarm

curr1_input		current
curr1_max_alarm		overcurrent alarm

power1_input		power usage
power1_alarm		power bad alarm
======================= =========================

Annotation

Implementation Notes