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

From	Benjamin Herrenschmidt <benh@kernel.crashing.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH V3 2/4] ARM64 LPC: LPC driver implementation on Hip06
Date	2016-10-06 02:30 +0200
Message-ID	<sp4Jr-Xg-5@gated-at.bofh.it> (permalink)
References	(1 earlier) <shhDQ-SQ-19@gated-at.bofh.it> <shjPk-27U-17@gated-at.bofh.it> <shq4p-6gS-15@gated-at.bofh.it> <snXK1-4oA-3@gated-at.bofh.it> <sowHL-2uG-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

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,

Thread

Re: [PATCH V3 2/4] ARM64 LPC: LPC driver implementation on Hip06 Jon Masters <jcm@jonmasters.org> - 2016-10-03 00:50 +0200
  Re: [PATCH V3 2/4] ARM64 LPC: LPC driver implementation on Hip06 John Garry <john.garry@huawei.com> - 2016-10-04 14:10 +0200
    Re: [PATCH V3 2/4] ARM64 LPC: LPC driver implementation on Hip06 Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2016-10-06 02:30 +0200
      Re: [PATCH V3 2/4] ARM64 LPC: LPC driver implementation on Hip06 John Garry <john.garry@huawei.com> - 2016-10-06 15:40 +0200

csiph-web