96 lines
2.6 KiB
ReStructuredText
96 lines
2.6 KiB
ReStructuredText
.. 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.
|
|
======================= =======================================================
|