hwmon: (lm90) Support MAX1617 and LM84

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MAX1617 and LM84 are stripped-down versions of LM90, so they can easily
be supported by the LM90 driver. The most difficult part is chip detection,
since those old chips do not support manufacturer ID or chip ID registers.

The "alarms" attribute is enabled for both chips to match the functionality
of the adm1021 driver. Chip detection was improved and is less prone to
misdetection than the chip detection in the adm1021 driver.

Devicetree nodes are not added for the added chips since it is quite
unlikely that such old chips will ever be used in a devicetree based
system. They 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 2021-11-19 13:55:47 -08:00

parent 6be4b1a430

commit c09472fcf9

3 changed files with 275 additions and 43 deletions

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45

Documentation/hwmon/lm90.rst

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9

drivers/hwmon/Kconfig

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264

drivers/hwmon/lm90.c

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