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linux-next/Documentation/hwmon/adt7411
Wolfram Sang d84ca5b345 hwmon: Add driver for ADT7411 voltage and temperature sensor
Add basic support for the ADT7411. Reads out all conversion results (via I2C,
SPI yet missing) and allows some on-the-fly configuration. Tested with a
custom board.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-03-05 22:17:23 +01:00

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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.