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

[Xo Wang]

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