linux-kernel - Re: [PATCH v5 1/6] of/serial: move earlycon early

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Date:	Tue, 22 Mar 2016 19:55:32 +0300
From:	Aleksey Makarov <aleksey.makarov@...aro.org>
To:	Rob Herring <robh+dt@...nel.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J . Wysocki" <rjw@...ysocki.net>,
	Len Brown <lenb@...nel.org>,
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Russell King <linux@....linux.org.uk>,
	Leif Lindholm <leif.lindholm@...aro.org>,
	Graeme Gregory <graeme.gregory@...aro.org>,
	Al Stone <ahs3@...hat.com>,
	Christopher Covington <cov@...eaurora.org>,
	Yury Norov <ynorov@...iumnetworks.com>,
	Peter Hurley <peter@...leysoftware.com>,
	"Zheng, Lv" <lv.zheng@...el.com>,
	Frank Rowand <frowand.list@...il.com>,
	Grant Likely <grant.likely@...aro.org>,
	Jiri Slaby <jslaby@...e.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH v5 1/6] of/serial: move earlycon early_param handling to
 serial



On 03/22/2016 02:15 PM, Rob Herring wrote:
> On Tue, Mar 22, 2016 at 5:46 AM, Aleksey Makarov
> <aleksey.makarov@...aro.org> wrote:
>> From: Leif Lindholm <leif.lindholm@...aro.org>
>>
>> We have multiple "earlycon" early_param handlers - merge the DT one into
>> the main earlycon one.  It's a cleanup that also will be useful
>> to decide if ACPI SPCR earlycon should be set up.
> 
> How so? Isn't that determined by whether we have ACPI tables or a DT?

Oops, I missed this.  This patch was not only to do parsing in one place, 
but also to allow addition of code that decide which of ACPI/DT should be used
for earlycon initialization based on acpi_disabled.

I will fix this, thank you.

> This goes against trying to limit places of FDT parsing and keeping
> the early scanning all within fdt.c. At least it is not in the arch
> code. That said, I'm okay with this change if it helps.
> 
> Rob
>