linux-kernel - Re: [PATCH 4/4] dt-bindings: firmware: Add Qualcomm UEFI Secure Application client

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Date:   Thu, 28 Jul 2022 14:42:22 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     Maximilian Luz <luzmaximilian@...il.com>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Ard Biesheuvel <ardb@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Steev Klimaszewski <steev@...i.org>,
        Shawn Guo <shawn.guo@...aro.org>,
        Cristian Marussi <cristian.marussi@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-arm-msm@...r.kernel.org, linux-efi@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] dt-bindings: firmware: Add Qualcomm UEFI Secure
 Application client

On Thu, Jul 28, 2022 at 01:45:57PM +0200, Maximilian Luz wrote:
>
> Would something like this work for you: Add a compatible for the TrEE
> interface (e.g. qcom,sc8180x-tee) but not for the specific apps running

IIUC, you would introduce a compatible for each unique production if there
is a need. This constitutes as a strong need for that, but you need just
that, no need to have any notion or info to indicate TrEE/TEE as you know
this product runs those in TEE.

In short, just use the platform specific(not SoC or SoC family) specific
compatible to initialise your driver and don't introduce any specific
compatible for this particular firmware interface need.

--
Regards,
Sudeep