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Each of the CPSW5G ports in J7200 support additional modes like QSGMII. Add a new compatible for J7200 to support the additional modes. In TI's J7200, each of the CPSW5G ethernet interfaces can act as a QSGMII or QSGMII-SUB port. The QSGMII interface is responsible for performing auto-negotiation between the MAC and the PHY while the rest of the interfaces are designated as QSGMII-SUB interfaces, indicating that they will not be taking part in the auto-negotiation process. To indicate the interface which will serve as the main QSGMII interface, add a property "ti,qsgmii-main-ports", whose value indicates the port number of the interface which shall serve as the main QSGMII interface. The rest of the interfaces are then assigned QSGMII-SUB mode by default. The property "ti,qsgmii-main-ports" is used to configure the CTRLMMR_ENETx_CTRL register. Depending on the device, it is possible for more than one QSGMII main port to exist. Thus, the property "ti,qsgmii-main-ports" is defined as an array of values in order to reuse the property for other devices. Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com> Link: https://lore.kernel.org/r/20220912085650.83263-4-s-vadapalli@ti.com Signed-off-by: Vinod Koul <vkoul@kernel.org> |
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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.