From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.kmu-office.ch ([2a02:418:6a02::a2]) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1ej7EV-00026A-KN for linux-mtd@lists.infradead.org; Tue, 06 Feb 2018 17:40:41 +0000 From: Stefan Agner To: han.xu@nxp.com, boris.brezillon@free-electrons.com Cc: marek.vasut@gmail.com, richard@nod.at, dwmw2@infradead.org, cyrille.pitchen@wedev4u.fr, max.oss.09@gmail.com, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, Stefan Agner Subject: [PATCH 1/2] dt-bindings: mtd: gpmi-nand: specify fsl, use-minimum-ecc behavior Date: Tue, 6 Feb 2018 18:40:20 +0100 Message-Id: <20180206174021.5947-1-stefan@agner.ch> List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , The dt property fsl,use-minimum-ecc requires a NAND chip to provide a ECC strength/step size, otherwise the driver fails to probe. This is by design to avoid that the driver uses a fallback and later changes ECC parameters due to additionion of a NAND chip driver. Document the current behavior. Signed-off-by: Stefan Agner --- Documentation/devicetree/bindings/mtd/gpmi-nand.txt | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/mtd/gpmi-nand.txt b/Documentation/devicetree/bindings/mtd/gpmi-nand.txt index b289ef3c1b7e..eb2d9919d063 100644 --- a/Documentation/devicetree/bindings/mtd/gpmi-nand.txt +++ b/Documentation/devicetree/bindings/mtd/gpmi-nand.txt @@ -34,9 +34,8 @@ Optional properties: automatically discoverable for some flash (e.g., according to the ONFI standard). However, note that if this strength is not - discoverable or this property is not enabled, - the software may chooses an implementation-defined - ECC scheme. + discoverable the driver will fail probing with + an error. - fsl,no-blockmark-swap: Don't swap the bad block marker from the OOB area with the byte in the data area but rely on the flash based BBT for identifying bad blocks. -- 2.16.1