linux-kernel - Re: [PATCH v2 4/4] arm64: dts: Add Broadcom North Star 2 support

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Date:	Wed, 15 Jul 2015 10:30:56 -0700
From:	Ray Jui <rjui@...adcom.com>
To:	Mark Rutland <mark.rutland@....com>
CC:	Catalin Marinas <Catalin.Marinas@....com>,
	Will Deacon <Will.Deacon@....com>,
	Arnd Bergmann <arnd@...db.de>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Hauke Mehrtens <hauke@...ke-m.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"bcm-kernel-feedback-list@...adcom.com" 
	<bcm-kernel-feedback-list@...adcom.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Jon Mason <jonmason@...adcom.com>
Subject: Re: [PATCH v2 4/4] arm64: dts: Add Broadcom North Star 2 support



On 7/15/2015 2:21 AM, Mark Rutland wrote:
> Hi,
> 
>> +	chosen {
>> +		stdout-path = "serial0:115200n8";
>> +		bootargs = "earlycon=uart8250,mmio32,0x66130000";
>> +	};
> 
> You shouldn't need those earlycon arguments if your driver has
> of_earlycon support. If that's currently missing, could you add that
> instead?
> 
> Thanks,
> Mark.
> 

I can look into this and add the of_earlycon support for
8250_dw. It looks like it may be only a matter of hooking it up to the
setup function in 8250_early.c, which is quite straightforward.

So does it make more sense for me to do the following?
1) Drop the earlycon bootargs from ns2-svk.dts and continue the Broadcom
iProc arm64 upstreaming process with the current patch series
2) Start a separate, new patch series with OF_EARLYCON support to 8250
DW driver

Thanks,

Ray
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