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| Filename | Latest commit message | Latest commit date |
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316734fdcf
It appears that the mvpp22 can get stuck with SGMII negotiation. The symptoms are that in-band negotiation never completes and the partner (eg, PHY) never reports SGMII link up, or if it supports negotiation bypass, goes into negotiation bypass mode (which will happen when the PHY sees that the MAC is alive but gets no response.) Triggering the PHY end of the link to re-negotiate results in the bypass bit clearing on the PHY, and then re-setting - indicating that the problem is at the mvpp22 GMAC end. Asserting the GMAC reset and de-asserting it resolves the issue. Arrange to assert the GMAC reset at probe time, and deassert it only after we have configured the GMAC for the appropriate mode. This resolves the issue. Tested-by: Sven Auhagen <sven.auhagen@voleatech.de> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| README | ||
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.