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Thu, 13 Jun 2019 16:00:57 -0700 (PDT) Received: from localhost ([64.188.179.243]) by smtp.gmail.com with ESMTPSA id n5sm655080qta.29.2019.06.13.16.00.56 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 13 Jun 2019 16:00:56 -0700 (PDT) Date: Thu, 13 Jun 2019 17:00:55 -0600 From: Rob Herring To: Peng Fan Subject: Re: [RFC 1/2] dt-bindings: imx-ocotp: Add fusable-node property Message-ID: <20190613230055.GA19296@bogus> References: <20190520032020.7920-1-peng.fan@nxp.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190520032020.7920-1-peng.fan@nxp.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190613_160058_875406_46FC5AE5 X-CRM114-Status: GOOD ( 12.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "mark.rutland@arm.com" , "devicetree@vger.kernel.org" , "festevam@gmail.com" , "s.hauer@pengutronix.de" , "linux-kernel@vger.kernel.org" , "srinivas.kandagatla@linaro.org" , dl-linux-imx , "kernel@pengutronix.de" , "shawnguo@kernel.org" , "linux-arm-kernel@lists.infradead.org" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, May 20, 2019 at 03:06:35AM +0000, Peng Fan wrote: > Introduce fusable-node property for i.MX OCOTP driver. > The property will only be used by Firmware(eg. U-Boot) to > runtime disable the nodes. > > Take i.MX6ULL for example, there are several parts that only > have limited modules enabled controlled by OCOTP fuse. It is > not flexible to provide several dts for the serval parts, instead > we could provide one device tree and let Firmware to runtime disable > the device tree nodes for those modules that are disable(fused). > > Signed-off-by: Peng Fan > --- > > Currently NXP vendor use U-Boot to set status to disabled for devices > that could not function, > https://source.codeaurora.org/external/imx/uboot-imx/tree/arch/arm/mach-imx/mx6/module_fuse.c?h=imx_v2018.03_4.14.98_2.0.0_ga#n149 > But this approach is will not work if kernel dts node path changed. Why would the path change? The DT should be stable. Rob _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel