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If the PTP_PEROUT_DUTY_CYCLE flag is set, then check if the request_on value in ptp_perout_request matches the pre-defined values or a toggle option. Return a failure if the value is not supported. Preserve the old behaviors if the PTP_PEROUT_DUTY_CYCLE flag is not set. Tested with an oscilloscope on EVB-LAN7430: e.g., to output PPS 1sec period 500mS on (high) to GPIO 2. ./testptp -L 2,2 ./testptp -p 1000000000 -w 500000000 Signed-off-by: Yuiko Oshino <yuiko.oshino@microchip.com> Link: https://lore.kernel.org/r/1634046593-64312-1-git-send-email-yuiko.oshino@microchip.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.