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* net: dsa: return early if there is no masterMichael Walle2021-03-051-4/+4
| | | | | | | | | | | It doesn't make sense to have DSA without a master port. Error out early if there is no master port. Fixes: fc054d563bfb ("net: Introduce DSA class for Ethernet switches") Signed-off-by: Michael Walle <michael@walle.cc> Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com> Reviewed-by: Ramon Fried <rfried.dev@gmail.com> Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
* net: Introduce DSA class for Ethernet switchesClaudiu Manoil2021-02-161-0/+478
DSA stands for Distributed Switch Architecture and it covers switches that are connected to the CPU through an Ethernet link and generally use frame tags to pass information about the source/destination ports to/from CPU. Front panel ports are presented as regular ethernet devices in U-Boot and they are expected to support the typical networking commands. DSA switches may be cascaded, DSA class code does not currently support this. Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com> Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>