linux-kernel - Re: [PATCH v8 2/3] dt-bindings: mtd: Add a property to declare secure regions in NAND chips

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Message-ID: <20210323222955.GA1461867@robh.at.kernel.org>
Date:   Tue, 23 Mar 2021 16:29:55 -0600
From:   Rob Herring <robh@...nel.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     vigneshr@...com, linux-kernel@...r.kernel.org, richard@....at,
        miquel.raynal@...tlin.com, devicetree@...r.kernel.org,
        boris.brezillon@...labora.com, linux-arm-msm@...r.kernel.org,
        linux-mtd@...ts.infradead.org, robh+dt@...nel.org,
        Daniele.Palmas@...it.com, bjorn.andersson@...aro.org
Subject: Re: [PATCH v8 2/3] dt-bindings: mtd: Add a property to declare
 secure regions in NAND chips

On Tue, 23 Mar 2021 13:09:29 +0530, Manivannan Sadhasivam wrote:
> On a typical end product, a vendor may choose to secure some regions in
> the NAND memory which are supposed to stay intact between FW upgrades.
> The access to those regions will be blocked by a secure element like
> Trustzone. So the normal world software like Linux kernel should not
> touch these regions (including reading).
> 
> So let's add a property for declaring such secure regions so that the
> drivers can skip touching them.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
>  Documentation/devicetree/bindings/mtd/nand-controller.yaml | 7 +++++++
>  1 file changed, 7 insertions(+)
> 

Reviewed-by: Rob Herring <robh@...nel.org>