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The GSW is found in all of the 1000mbit SoCs. it has 5 external ports, 1-2 cpu ports and 1 further port that the internal HW offloading engine connects to. The switch core used is a MT7530, which also exists as a standalone chip. Although these SoCs (mt7620/1/3) share the same switch core, the bring up of these is slightly different. One of the reasons is that on mt7620 the switch core is mmio mapped while MT7621/3 talks to the switch via MDIO addr 0x1f. Additionally, the SoCs have different MAC types and some of them have TRGMII support. MT7621 can do 1,2gbit and MT7623 is able to do 2,6gbit. The support for the TRGMII bring up is not part of this series as the code is based on the SDK driver and has between 1500 and 2000 magic values that still need to be converted to defines. Because of these differences we have 3 separate drivers for these 3 SoCs. These drivers are very basic and only provides basic init and irq support. The SoC and switch core both have support for a special tag making DSA support possible. NeilBrown: - added setting to mt7621_hw_init to match working code from libreCMC This needs to be converted to use switchdev. Signed-off-by: John Crispin <blogic@openwrt.org> Signed-off-by: NeilBrown <neil@brown.name> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.