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Checking three configuration register bits and the manufacturer ID register to auto-detect LM92 is a bit vague. Repeat twice on replicated register addresses to improve detection accuracy. Check the manufacturer ID first and bail out immediately without reading the other register if there is a mismatch to reduce the number of i2c transfers needed in that case. Also explicitly test for an error from reading the configuration register to avoid potential situations where the returned error masked against 0xe0 is 0. While at it, drop "lm92: Found National Semiconductor LM92 chip" detection noise. Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.