forked from Minki/linux
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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