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932ff0c802
The RZ/G3S Smarc Module has Ethernet PHYs (KSZ9131) connected to each Ethernet IP. For this, add proper DT descriptions to enable Ethernet communication through these PHYs. The interface b/w PHYs and MACs is RGMII. The skew settings were set to zero as based on phy-mode (rgmii-id) the KSZ9131 driver enables internal DLL, which adds a 2ns delay b/w clocks (TX/RX) and data signals. Different pin settings were applied to TXC and TX_CTL compared with the rest of the RGMII pins to comply with requirements for these pins imposed by HW manual of RZ/G3S (see chapters "Ether Ch0 Voltage Mode Control Register (ETH0_POC)", "Ether Ch1 Voltage Mode Control Register (ETH1_POC)", for power source selection, "Ether MII/RGMII Mode Control Register (ETH_MODE)" for output-enable and "Input Enable Control Register (IEN_m)" for input-enable configurations). Also enable the Ethernet interfaces by selecting SW_CONFIG3 = SW_ON. Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20231207070700.4156557-12-claudiu.beznea.uj@bp.renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> |
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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.