mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-14 02:59:19 -04:00
fe20bfa51c
There is a significant time required for PHY Micrel KSZ8041 to power up. Add a delay on start-up/wake-up before the FEC starts communicating with the PHY. LDO1 takes 6 ms, R39 + C44 takes ~100ms, the KSZ8041 datasheet asks for ~11 ms before starting any programming on the MIIM. Counting that, add a 200 ms delay to be sure the PHY is ready for programming. Also, add the same off delay time to give the capacitor time to discharge in order to properly reset. Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com> Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com> Signed-off-by: Shawn Guo <shawnguo@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.