linux-kernel - Re: [RFC PATCH 3/3] arm64: dts: bcmbca: update bcm4808 board dts file

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Message-ID: <b350020eee4de0caf36f88f299e61930@milecki.pl>
Date:   Wed, 13 Jul 2022 12:55:03 +0200
From:   Rafał Miłecki <rafal@...ecki.pl>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        William Zhang <william.zhang@...adcom.com>,
        Linux ARM List <linux-arm-kernel@...ts.infradead.org>,
        kursad.oney@...adcom.com, anand.gore@...adcom.com,
        dan.beygelman@...adcom.com,
        Broadcom Kernel List <bcm-kernel-feedback-list@...adcom.com>,
        joel.peshkin@...adcom.com,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 3/3] arm64: dts: bcmbca: update bcm4808 board dts file

On 2022-07-12 17:36, Florian Fainelli wrote:
> On 7/12/22 00:47, Krzysztof Kozlowski wrote:
>> On 12/07/2022 04:11, William Zhang wrote:
>>> Update compatible string based on the new bcmbca binding rule
>>> for BCM4908 famliy based boards
>> 
>> Typo - family
>> 
>> Please explain why breaking the ABI (and users of these DTS_ is 
>> acceptable.
> 
> This will be largely targeted towards Rafal who supports these kinds
> of devices with an upstream kernel. My understanding is that this is
> OK because we will always ship a DTB matching the Linux kernel, and I
> believe this is true for both the way that William and his group
> support these devices, as well as how OpenWrt, buildroot or other
> build systems envision to support these devices.
> 
> Rafal, does that sound about right?

Right - in all cases I'm aware of - Linux gets shipped with DTB files.
So such change won't actually break anything in real world.