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ADC sample captures take a certain amount of time to complete after initiated; this conversion time range can be anywhere from 5 microseconds to 53.68 seconds depending on the configuration of the Analog Input Frame Timer register. When the conversion is in progress, the ADC Status register CNV bit is high. Call regmap_read_poll_timeout() to poll until the ADC conversion is completed (or timeout if more than 53.68 seconds passes). Suggested-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: William Breathitt Gray <william.gray@linaro.org> Link: https://lore.kernel.org/r/9ef433f107afd1d4dcd2d97ef0e932d7045c2bbd.1680790580.git.william.gray@linaro.org Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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.