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The AP has third pulse generator available starting with IPA v5.0. Redefine ipa_qtime_val() to support that possibility. Pass the IPA pointer as an argument so the version can be determined. And stop using the sign of the returned tick count to indicate which of two pulse generators to use. Instead, have the caller provide the address of a variable that will hold the selected pulse generator for the Qtime value. And for version 5.0, check whether the third pulse generator best represents the time period. Add code in ipa_qtime_config() to configure the fourth pulse generator for IPA v5.0+; in that case configure both the third and fourth pulse generators to use 10 msec granularity. Consistently use "ticks" for local variables that represent a tick count. Signed-off-by: Alex Elder <elder@linaro.org> Reviewed-by: Leon Romanovsky <leonro@nvidia.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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.