77 lines
1.8 KiB
ReStructuredText
77 lines
1.8 KiB
ReStructuredText
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Kernel driver tmp421
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====================
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Supported chips:
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* Texas Instruments TMP421
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Prefix: 'tmp421'
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Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f
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Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
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* Texas Instruments TMP422
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Prefix: 'tmp422'
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Addresses scanned: I2C 0x4c, 0x4d, 0x4e and 0x4f
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Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
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* Texas Instruments TMP423
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Prefix: 'tmp423'
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Addresses scanned: I2C 0x4c and 0x4d
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Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
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* Texas Instruments TMP441
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Prefix: 'tmp441'
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Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f
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Datasheet: https://www.ti.com/product/tmp441
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* Texas Instruments TMP442
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Prefix: 'tmp442'
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Addresses scanned: I2C 0x4c and 0x4d
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Datasheet: https://www.ti.com/product/tmp442
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Authors:
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Andre Prendel <andre.prendel@gmx.de>
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Description
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-----------
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This driver implements support for Texas Instruments TMP421, TMP422,
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TMP423, TMP441, and TMP442 temperature sensor chips. These chips
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implement one local and up to one (TMP421, TMP441), up to two (TMP422,
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TMP442) or up to three (TMP423) remote sensors. Temperature is measured
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in degrees Celsius. The chips are wired over I2C/SMBus and specified
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over a temperature range of -40 to +125 degrees Celsius. Resolution
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for both the local and remote channels is 0.0625 degree C.
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The chips support only temperature measurement. The driver exports
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the temperature values via the following sysfs files:
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**temp[1-4]_input**
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**temp[2-4]_fault**
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Each sensor can be individually disabled via Devicetree or from sysfs
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via:
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**temp[1-4]_enable**
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If labels were specified in Devicetree, additional sysfs files will
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be present:
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**temp[1-4]_label**
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