linux-kernel - Re: [PATCHv4 1/3] dt-bindings: mmc: synopsys-dw-mshc: document "altr,sysmgr-syscon"

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Date:   Thu, 29 Sep 2022 13:13:11 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Dinh Nguyen <dinguyen@...nel.org>, jh80.chung@...sung.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCHv4 1/3] dt-bindings: mmc: synopsys-dw-mshc: document
 "altr,sysmgr-syscon"

On 29/09/2022 13:04, Ulf Hansson wrote:
>>> So this change will not be backwards compatible with existing DTBs. I
>>> noticed that patch2 updates the DTS files for the arm64 platforms, but
>>> there seems to be some arm32 platforms too. Isn't this going to be a
>>> problem?
>>>
>>
>> The backwards compatibility is actually expressed by the driver. If the
>> driver keeps ABI, we can change bindings so that all DTS are being
>> updated to pass the checks.
> 
> Right.
> 
> So, I should probably have responded to patch3 instead, as backwards
> compatibility doesn't seem to be supported, unless I am mistaken. 

Yes, it looks like

Best regards,
Krzysztof