[PATCH linux v2] arm: aspeed: zaius: Disable LPC reset for UART1

[Rick Altherr]

OK.  I didn't get that from the commit message or comments as written.

On Tue, Jan 31, 2017 at 2:23 PM, Xo Wang via openbmc <
openbmc at lists.ozlabs.org> wrote:

> On Sat, Jan 28, 2017 at 12:00 AM, Andrew Jeffery <andrew at aj.id.au> wrote:
> > On Fri, 2017-01-27 at 15:32 -0800, Rick Altherr wrote:
> >> I still don't follow.  Is this changing it to drop bytes until the
> >> host powers on?  Is this change making it so the device won't open?
> >
> > I understand it to be the other way around:
> >
> > In the existing configuration UART1 will drop bytes by being held in
> > reset until the host initialises the LPC bus (i.e. releases LPCRST#)
> > during boot.
> >
> > Xo's change reconfigures the SoC so that UART1 reset state doesn't
> > depend on LPCRST# (i.e. the host initialising the LPC bus), so it is
> > immediately useful in that it won't discard bytes.
> >
> > Xo?
>
> Yes, what Andrew said. It releases UART1 from being controlled by LPC
> reset, so that it's available regardless of the host being up.
>
> cheers
> xo
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