adt7411.rst

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
in[1-8]_input	 analog 1-8 input
temp1_input	 temperature input
================ =================

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, external temperature sensor and limit registers are not supported yet.