Re: [PATCH] [v3] serial: 8250: remove obsolete and broken PORT_RSA support

[Maciej W. Rozycki]

On Wed, 21 Oct 2026, Arnd Bergmann wrote:

> >  Or, to self-correct after a few more mind cycles spent on this piece, the 
> > region below `port->iobase' is an expansion of one above, where standard 
> > 8250 registers of the onboard serial port reside.  Which makes even more 
> > sense, to me anyway.
> 
> Good catch, so it should still work the same way it was originally
> designed, though I think it still requires a modified setserial to
> set PORT_RSA, or a boot time argument for autoconfiguration with
> UART_CONFIG_TYPE.

 Well, this is ISA, what do you expect?  We've dropped lots of stuff that 
required perhaps even more complex manual configuration already (QIC-02 
tapes, anyone?).

  Maciej