Re: [PATCH V3 2/4] ARM64 LPC: LPC driver implementation on Hip06

[John Garry]

On 06/10/2016 01:18, Benjamin Herrenschmidt wrote:
> On Tue, 2016-10-04 at 13:02 +0100, John Garry wrote:
> > Right, so I think Zhichang can make the necessary generic changes to
> > 8250 OF driver to support IO port as well as MMIO-based.
> >
> > However an LPC-based earlycon driver is still required.
> >
> > A note on hip07-based D05 (for those unaware): this does not use
> > LPC-based uart. It uses PL011. The hardware guys have managed some
> > trickery where they loopback the serial line around the BMC/CPLD. But we
> > still need it for hip06 D03 and any other boards which want to use LPC
> > bus for uart.
> >
> > A question on SBSA: does it propose how to provide serial via BMC for SOL?
>
> Probably another reason to keep 8250 as a legal option ... The (very
> popular) Aspeed BMCs tend to do this via a 8250-looking virtual UART on
> LPC.
>
> Cheers,
> Ben,

I think we're talking about the same thing for our LPC-based UART.

John

> .