hwmon: (lm90) Add support for MAX6642

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MAX6642 is a reduced version of LM90 with no low limits and no conversion
rate register. Its alert functionality is broken, similar to many other
chips supported by the lm90 driver.

After this change, the stand-alone max6642 driver is only needed if the
lm90 driver is disabled. Make it dependent on SENSORS_LM90=n to show that
it is not needed if the lm90 driver is enabled.

A devicetree node is not added for this chip since it is quite unlikely
that such an old chip will ever be used in a devicetree based system.
It can be added later if needed.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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This commit is contained in:

Guenter Roeck 2021-11-15 18:10:11 -08:00

parent ca6bfa3b73

commit 3c1ecccbbc

3 changed files with 83 additions and 16 deletions

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16

Documentation/hwmon/lm90.rst

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5

drivers/hwmon/Kconfig

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78

drivers/hwmon/lm90.c

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