Kernel driver adt7411

Supported chips:

• Analog Devices ADT7411

  Prefix: ‘adt7411’

  Addresses scanned: 0x48, 0x4a, 0x4b

  Datasheet: Publicly available at the Analog Devices website

Author: Wolfram Sang (based on adt7470 by Darrick J. Wong)

Description

This driver implements support for the Analog Devices ADT7411 chip. There may be other chips that implement this interface.

The ADT7411 can use an I2C/SMBus compatible 2-wire interface or an SPI-compatible 4-wire interface. It provides a 10-bit analog to digital converter which measures 1 temperature, vdd and 8 input voltages. It has an internal temperature sensor, but an external one can also be connected (one loses 2 inputs then). There are high- and low-limit registers for all inputs.

Check the datasheet for details.

sysfs-Interface

in0_input	vdd voltage input
in0_min	vdd low limit
in0_max	vdd high limit
in0_alarm	vdd alarm
in[1-8]_input	analog 1-8 input
in[1-8]_min	analog input low limit
in[1-8]_max	analog input high limit
in[1-8]_alarm	analog input alarm
temp1_input	internal temperature input
temp1_min	internal temperature low limit
temp1_max	internal temperature high limit
temp1_min_alarm	internal temperature low alarm
temp1_max_alarm	internal temperature high alarm

If the external temperature sensor is enabled, the following attributes are also available:

temp2_input	external temperature input
temp2_min	external temperature low limit
temp2_max	external temperature high limit
temp2_min_alarm	external temperature low alarm
temp2_max_alarm	external temperature high alarm
temp2_fault	external temperature sensor fault

If the external temperature sensor is enabled, analog inputs in1 and in2 are not available.

Besides standard interfaces, this driver adds (0 = off, 1 = on):

adc_ref_vdd	Use vdd as reference instead of 2.25 V
fast_sampling	Sample at 22.5 kHz instead of 1.4 kHz, but drop filters
no_average	Turn off averaging over 16 samples

Notes

SPI is not supported yet.