mirror of
https://github.com/torvalds/linux.git
synced 2024-11-01 17:51:43 +00:00
d84ca5b345
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>
43 lines
1.3 KiB
Plaintext
43 lines
1.3 KiB
Plaintext
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.
|