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

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Date:   Wed, 13 Jul 2022 13:09:39 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Rafał Miłecki <rafal@...ecki.pl>,
        Florian Fainelli <f.fainelli@...il.com>
Cc:     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 13/07/2022 12:55, Rafał Miłecki wrote:
> 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.

We don't really talk here about Linux, but other projects, like
bootloaders or *BSD...

Best regards,
Krzysztof