76 lines
2.5 KiB
ReStructuredText
76 lines
2.5 KiB
ReStructuredText
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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================ =================================
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in0_input vdd voltage input
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in0_min vdd low limit
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in0_max vdd high limit
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in0_alarm vdd alarm
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in[1-8]_input analog 1-8 input
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in[1-8]_min analog input low limit
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in[1-8]_max analog input high limit
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in[1-8]_alarm analog input alarm
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temp1_input internal temperature input
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temp1_min internal temperature low limit
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temp1_max internal temperature high limit
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temp1_min_alarm internal temperature low alarm
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temp1_max_alarm internal temperature high alarm
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================ =================================
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If the external temperature sensor is enabled, the following attributes are
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also available:
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================ ================================================
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temp2_input external temperature input
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temp2_min external temperature low limit
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temp2_max external temperature high limit
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temp2_min_alarm external temperature low alarm
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temp2_max_alarm external temperature high alarm
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temp2_fault external temperature sensor fault
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================ ================================================
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If the external temperature sensor is enabled, analog inputs in1 and in2 are
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not available.
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Besides standard interfaces, this driver adds (0 = off, 1 = on):
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============== =======================================================
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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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============== =======================================================
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Notes
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-----
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SPI is not supported yet.
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