Hi Andy, Thanks for the feedback. > Subject: Re: [PATCH v4 4/6] serial: 8250_em: Update port type as PORT_16750 > > On Fri, Feb 17, 2023 at 11:42:53AM +0000, Biju Das wrote: > > The UART IP found on {RZ/V2M, EMMA mobile} SoC is Register-compatible > > with the general-purpose 16750 UART chip. This patch updates port type > > from 16550A->16750 and also enables 64-bytes fifo support. > > ... > > > + up.port.flags = UPF_BOOT_AUTOCONF | UPF_FIXED_PORT | UPF_IOREMAP | > > +UPF_FIXED_TYPE; > > Do you still need UPF_BOOT_AUTOCONF? No, it is not needed. I will fix this in next version. Cheers, Biju