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38d9f06c57
TMP461 is almost identical to TMP451, which is already supported by the
lm90 driver. At the same time, unlike other sensors from the TMP401
compatible series, it only supports 8-bit temperature read operations,
and it supports negative temperatures when configured for its default
temperature range, and it supports a temperature offset register.
Supporting this chip in the tmp401 driver adds unnecessary complexity.
Remove its support from this driver and support the chip with the lm90
driver instead.
Fixes: 24333ac26d ("hwmon: (tmp401) use smb word operations instead of 2 smb byte operations")
Reported-by: David T. Wilson <david.wilson@nasa.gov>
Cc: David T. Wilson <david.wilson@nasa.gov>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
81 lines
2.0 KiB
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81 lines
2.0 KiB
ReStructuredText
Kernel driver tmp401
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====================
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Supported chips:
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* Texas Instruments TMP401
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Prefix: 'tmp401'
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Addresses scanned: I2C 0x4c
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Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp401.html
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* Texas Instruments TMP411
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Prefix: 'tmp411'
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Addresses scanned: I2C 0x4c, 0x4d, 0x4e
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Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp411.html
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* Texas Instruments TMP431
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Prefix: 'tmp431'
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Addresses scanned: I2C 0x4c, 0x4d
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Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp431.html
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* Texas Instruments TMP432
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Prefix: 'tmp432'
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Addresses scanned: I2C 0x4c, 0x4d
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Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp432.html
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* Texas Instruments TMP435
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Prefix: 'tmp435'
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Addresses scanned: I2C 0x48 - 0x4f
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Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp435.html
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Authors:
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- Hans de Goede <hdegoede@redhat.com>
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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 TMP401, TMP411,
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TMP431, TMP432, and TMP435 chips. These chips implement one or two
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remote and one local temperature sensors. Temperature is measured in degrees
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Celsius. Resolution of the remote sensor is 0.0625 degree. Local
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sensor resolution can be set to 0.5, 0.25, 0.125 or 0.0625 degree (not
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supported by the driver so far, so using the default resolution of 0.5
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degree).
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The driver provides the common sysfs-interface for temperatures (see
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Documentation/hwmon/sysfs-interface.rst under Temperatures).
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The TMP411 and TMP431 chips are compatible with TMP401. TMP411 provides
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some additional features.
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* Minimum and Maximum temperature measured since power-on, chip-reset
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Exported via sysfs attributes tempX_lowest and tempX_highest.
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* Reset of historical minimum/maximum temperature measurements
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Exported via sysfs attribute temp_reset_history. Writing 1 to this
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file triggers a reset.
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TMP432 is compatible with TMP401 and TMP431. It supports two external
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temperature sensors.
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