4c0415a371
The data might need some time to get ready after channel enabling, although the data register is always readable. The CVRF bit is to indicate that data conversion is finished, so polling the CVRF bit before data reading could ensure the result being valid. An alternative way could be to wait for expected time between the channel enabling and the data reading. And this could avoid extra I2C communications. However, INA3221 seemly takes longer time than what's stated in the datasheet. Test results show that sometimes it couldn't finish data conversion in time. So this patch plays safe by adding a CVRF polling to make sure the data register is updated with the new data. Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com> 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 Restructured Text 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.