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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
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=====================
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Supported chips:
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* Analog Devices ADT7411
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Prefix: 'adt7411'
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Addresses scanned: 0x48, 0x4a, 0x4b
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Datasheet: Publicly available at the Analog Devices website
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Author: Wolfram Sang (based on adt7470 by Darrick J. Wong)
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Description
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-----------
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This driver implements support for the Analog Devices ADT7411 chip. There may
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be other chips that implement this interface.
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The ADT7411 can use an I2C/SMBus compatible 2-wire interface or an
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SPI-compatible 4-wire interface. It provides a 10-bit analog to digital
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converter which measures 1 temperature, vdd and 8 input voltages. It has an
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internal temperature sensor, but an external one can also be connected (one
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loses 2 inputs then). There are high- and low-limit registers for all inputs.
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Check the datasheet for details.
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sysfs-Interface
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---------------
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in0_input - vdd voltage input
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in[1-8]_input - analog 1-8 input
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temp1_input - temperature input
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Besides standard interfaces, this driver adds (0 = off, 1 = on):
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adc_ref_vdd - Use vdd as reference instead of 2.25 V
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fast_sampling - Sample at 22.5 kHz instead of 1.4 kHz, but drop filters
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no_average - Turn off averaging over 16 samples
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Notes
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-----
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SPI, external temperature sensor and limit registers are not supported yet.
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