35293cb392
PTP block supports generating PPS output signal on GPIO pin. This patch adds the support in the PTP PHC driver using standard periodic output interface. User can enable/disable/configure PPS by writing to the below sysfs entry echo perout.index start.sec start.nsec period.sec period.nsec > /sys/class/ptp/ptp0/period Example to generate 50% duty cycle PPS signal: echo 0 0 0 0 500000000 > /sys/class/ptp/ptp0/period Signed-off-by: Hariprasad Kelam <hkelam@marvell.com> Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com> Signed-off-by: Sai Krishna <saikrishnag@marvell.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.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.