On Fri, 29 Apr 2022 16:34:53 +0200 Clément Léger wrote: > The Renesas RZ/N1 SoCs features an ethernet subsystem which contains > (most notably) a switch, two GMACs, and a MII converter [1]. This > series adds support for the switch and the MII converter. > > The MII converter present on this SoC has been represented as a PCS > which sit between the MACs and the PHY. This PCS driver is probed from > the device-tree since it requires to be configured. Indeed the MII > converter also contains the registers that are handling the muxing of > ports (Switch, MAC, HSR, RTOS, etc) internally to the SoC. > > The switch driver is based on DSA and exposes 4 ports + 1 CPU > management port. It include basic bridging support as well as FDB and > statistics support. Build's not happy (W=1 C=1): drivers/net/dsa/rzn1_a5psw.c:574:29: warning: symbol 'a5psw_switch_ops' was not declared. Should it be static? In file included from ../drivers/net/dsa/rzn1_a5psw.c:17: drivers/net/dsa/rzn1_a5psw.h:221:1: note: offset of packed bit-field ‘port_mask’ has changed in GCC 4.4 221 | } __packed; | ^ drivers/net/dsa/rzn1_a5psw.h:200: warning: Function parameter or member 'hclk' not described in 'a5psw' drivers/net/dsa/rzn1_a5psw.h:200: warning: Function parameter or member 'clk' not described in 'a5psw' Not sure how many of these are added by you but I think 2 at least.