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net: dsa: microchip: ksz8: add MTU configuration support
Make MTU configurable on KSZ87xx and KSZ88xx series of switches. Before this patch, pre-configured behavior was different on different switch series, due to opposite meaning of the same bit: - KSZ87xx: Reg 4, Bit 1 - if 1, max frame size is 1532; if 0 - 1514 - KSZ88xx: Reg 4, Bit 1 - if 1, max frame size is 1514; if 0 - 1532 Since the code was telling "... SW_LEGAL_PACKET_DISABLE, true)", I assume, the idea was to set max frame size to 1532. With this patch, by setting MTU size 1500, both switch series will be configured to the 1532 frame limit. This patch was tested on KSZ8873. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Acked-by: Arun Ramadoss <arun.ramadoss@microchip.com> Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Oleksij Rempel
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Paolo Abeni
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Dec 7, 2022
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