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>
1.3 KiB
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.