Kernel driver lt3074

Supported chips:

• Analog Devices LT3074

  Prefix: ‘lt3074’

  Addresses scanned: -

  Datasheet: https://www.analog.com/en/products/lt3074.html

Authors: Cedric Encarnacion <cedricjustine.encarnacion@analog.com>

Description

This driver supports hardware monitoring for Analog Devices LT3074 Linear Regulator with PMBus interface.

The LT3074 is a low voltage, ultra-low noise and ultra-fast transient response linear regulator with PMBus serial interface. PMBus telemetry feature provides information regarding the output voltage and current, input voltage, bias voltage and die temperature.

The driver is a client driver to the core PMBus driver. Please see Kernel driver pmbus 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 How to instantiate I2C devices for details.

Platform data support

The driver supports standard PMBus driver platform data.

Sysfs entries

in1_label	“vin”
in1_input	Measured input voltage
in1_max	Input overvoltage warning limit
in1_max_alarm	Input overvoltage warning status
in1_min	Input undervoltage warning limit
in1_min_alarm	Input undervoltage warning status
in2_label	“vmon”
in2_input	Measured bias voltage
in2_max	Bias overvoltage warning limit
in2_min	Bias undervoltage warning limit
in3_label	“vout1”
in3_input	Measured output voltage
in3_max	Output overvoltage warning limit
in3_max_alarm	Output overvoltage warning status
in3_min	Output undervoltage warning limit
in3_min_alarm	Output undervoltage warning status
curr1_label	“iout1”
curr1_input	Measured output current.
curr1_crit	Output overcurrent fault limit
curr1_crit_alarm	Output overcurrent fault status
temp1_input	Measured temperature
temp1_max	Maximum temperature limit
temp1_max_alarm	Overtemperature warning status