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Tue, 23 Mar 2021 15:29:59 -0700 (PDT) Received: from robh.at.kernel.org ([64.188.179.253]) by smtp.gmail.com with ESMTPSA id z10sm115235ilm.19.2021.03.23.15.29.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Mar 2021 15:29:58 -0700 (PDT) Received: (nullmailer pid 1461925 invoked by uid 1000); Tue, 23 Mar 2021 22:29:55 -0000 Date: Tue, 23 Mar 2021 16:29:55 -0600 From: Rob Herring To: Manivannan Sadhasivam Cc: vigneshr@ti.com, linux-kernel@vger.kernel.org, richard@nod.at, miquel.raynal@bootlin.com, devicetree@vger.kernel.org, boris.brezillon@collabora.com, linux-arm-msm@vger.kernel.org, linux-mtd@lists.infradead.org, robh+dt@kernel.org, Daniele.Palmas@telit.com, bjorn.andersson@linaro.org Subject: Re: [PATCH v8 2/3] dt-bindings: mtd: Add a property to declare secure regions in NAND chips Message-ID: <20210323222955.GA1461867@robh.at.kernel.org> References: <20210323073930.89754-1-manivannan.sadhasivam@linaro.org> <20210323073930.89754-3-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210323073930.89754-3-manivannan.sadhasivam@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210323_223000_548833_B2827AAC X-CRM114-Status: GOOD ( 13.18 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org 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 > --- > Documentation/devicetree/bindings/mtd/nand-controller.yaml | 7 +++++++ > 1 file changed, 7 insertions(+) > Reviewed-by: Rob Herring ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/