linux-kernel - Re: [PATCH 2/3] ARM: dts: BCM5301X: Linksys EA9500 add port 5 and port 7

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Message-ID: <9c6e4da5-033e-6b30-4525-9f3a7b4ba01f@gmail.com>
Date:   Thu, 8 Oct 2020 07:58:35 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Andrew Lunn <andrew@...n.ch>, Vivek Unune <npcomplete13@...il.com>
Cc:     devicetree@...r.kernel.org, Hauke Mehrtens <hauke@...ke-m.de>,
        Rafał Miłecki <zajec5@...il.com>,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        bcm-kernel-feedback-list@...adcom.com,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/3] ARM: dts: BCM5301X: Linksys EA9500 add port 5 and
 port 7



On 10/7/2020 5:32 PM, Andrew Lunn wrote:
>> This router is currently not enabled in Openwrt
> 
> You have to be careful here. Not everything runs OpenWRT. You cannot
> break backwards compatibility in mainline, simple as that. You need to
> ensure that mainline does not see a change in the CPU port.

I don't think this is breaking anything, in premise all 3 CPU interfaces 
are completely interchangeable, with the notable fact that port 8 
happens to have the flow accelerator block available for re-circulation 
of packets if we wanted to support a NATP offload at some point in the 
future.

Vivek, maybe you can add ports 5 and 7 in the Device Tree and mark them 
as disabled for now.
-- 
Florian