[linux-2.6-block.git] / Documentation / hwmon / 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.
Commit	Line	Data
d84ca5b3 WS	1	Kernel driver adt7411
	2	=====================
	3
	4	Supported chips:
b04f2f7d	5
d84ca5b3	6	* Analog Devices ADT7411
b04f2f7d	7
d84ca5b3	8	Prefix: 'adt7411'
b04f2f7d	9
d84ca5b3	10	Addresses scanned: 0x48, 0x4a, 0x4b
b04f2f7d	11
d84ca5b3 WS	12	Datasheet: Publicly available at the Analog Devices website
	13
	14	Author: Wolfram Sang (based on adt7470 by Darrick J. Wong)
	15
	16	Description
	17	-----------
	18
	19	This driver implements support for the Analog Devices ADT7411 chip. There may
	20	be other chips that implement this interface.
	21
	22	The ADT7411 can use an I2C/SMBus compatible 2-wire interface or an
	23	SPI-compatible 4-wire interface. It provides a 10-bit analog to digital
	24	converter which measures 1 temperature, vdd and 8 input voltages. It has an
	25	internal temperature sensor, but an external one can also be connected (one
	26	loses 2 inputs then). There are high- and low-limit registers for all inputs.
	27
	28	Check the datasheet for details.
	29
	30	sysfs-Interface
	31	---------------
	32
b04f2f7d MCC	33	================ =================
	34	in0_input vdd voltage input
	35	in[1-8]_input analog 1-8 input
	36	temp1_input temperature input
	37	================ =================
d84ca5b3 WS	38
	39	Besides standard interfaces, this driver adds (0 = off, 1 = on):
	40
b04f2f7d MCC	41	============== =======================================================
	42	adc_ref_vdd Use vdd as reference instead of 2.25 V
	43	fast_sampling Sample at 22.5 kHz instead of 1.4 kHz, but drop filters
	44	no_average Turn off averaging over 16 samples
	45	============== =======================================================
d84ca5b3 WS	46
	47	Notes
	48	-----
	49
	50	SPI, external temperature sensor and limit registers are not supported yet.