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Wed, 5 Jul 2023 07:37:02 +0000 (UTC) Date: Wed, 5 Jul 2023 09:37:02 +0200 From: Miquel Raynal To: Arseniy Krasnov Cc: Liang Yang , Richard Weinberger , Vignesh Raghavendra , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , , , , , , , Subject: Re: [RFC PATCH v2 1/2] dt-bindings: nand: meson: support for 512B ECC step size Message-ID: <20230705093702.6c0421d7@xps-13> In-Reply-To: <20230705065434.297040-2-AVKrasnov@sberdevices.ru> References: <20230705065434.297040-1-AVKrasnov@sberdevices.ru> <20230705065434.297040-2-AVKrasnov@sberdevices.ru> Organization: Bootlin X-Mailer: Claws Mail 4.0.0 (GTK+ 3.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230705_003713_406208_49164AC2 X-CRM114-Status: GOOD ( 20.00 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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Wed, 5 Jul 2023 07:37:02 +0000 (UTC) Date: Wed, 5 Jul 2023 09:37:02 +0200 From: Miquel Raynal To: Arseniy Krasnov Cc: Liang Yang , Richard Weinberger , Vignesh Raghavendra , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , , , , , , , Subject: Re: [RFC PATCH v2 1/2] dt-bindings: nand: meson: support for 512B ECC step size Message-ID: <20230705093702.6c0421d7@xps-13> In-Reply-To: <20230705065434.297040-2-AVKrasnov@sberdevices.ru> References: <20230705065434.297040-1-AVKrasnov@sberdevices.ru> <20230705065434.297040-2-AVKrasnov@sberdevices.ru> Organization: Bootlin X-Mailer: Claws Mail 4.0.0 (GTK+ 3.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230705_003713_406208_49164AC2 X-CRM114-Status: GOOD ( 20.00 ) 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; 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Wed, 5 Jul 2023 07:37:02 +0000 (UTC) Date: Wed, 5 Jul 2023 09:37:02 +0200 From: Miquel Raynal To: Arseniy Krasnov Cc: Liang Yang , Richard Weinberger , Vignesh Raghavendra , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , , , , , , , Subject: Re: [RFC PATCH v2 1/2] dt-bindings: nand: meson: support for 512B ECC step size Message-ID: <20230705093702.6c0421d7@xps-13> In-Reply-To: <20230705065434.297040-2-AVKrasnov@sberdevices.ru> References: <20230705065434.297040-1-AVKrasnov@sberdevices.ru> <20230705065434.297040-2-AVKrasnov@sberdevices.ru> Organization: Bootlin X-Mailer: Claws Mail 4.0.0 (GTK+ 3.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230705_003713_406208_49164AC2 X-CRM114-Status: GOOD ( 20.00 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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Wed, 5 Jul 2023 07:37:02 +0000 (UTC) Date: Wed, 5 Jul 2023 09:37:02 +0200 From: Miquel Raynal To: Arseniy Krasnov Cc: Liang Yang , Richard Weinberger , Vignesh Raghavendra , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , , , , , , , Subject: Re: [RFC PATCH v2 1/2] dt-bindings: nand: meson: support for 512B ECC step size Message-ID: <20230705093702.6c0421d7@xps-13> In-Reply-To: <20230705065434.297040-2-AVKrasnov@sberdevices.ru> References: <20230705065434.297040-1-AVKrasnov@sberdevices.ru> <20230705065434.297040-2-AVKrasnov@sberdevices.ru> Organization: Bootlin X-Mailer: Claws Mail 4.0.0 (GTK+ 3.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Hi Arseniy, AVKrasnov@sberdevices.ru wrote on Wed, 5 Jul 2023 09:54:33 +0300: > Meson NAND supports both 512B and 1024B ECC step size, so replace > 'const' for only 1024B step size with enum for both sizes. >=20 > Signed-off-by: Arseniy Krasnov > --- > Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) >=20 > diff --git a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yam= l b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml > index 3bec8af91bbb..81ca8828731a 100644 > --- a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml > +++ b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml > @@ -49,7 +49,8 @@ patternProperties: > const: hw > =20 > nand-ecc-step-size: > - const: 1024 > + enum: [512, 1024] > + default: 1024 I was actually wrong in my previous review, there is no strong default here as the existing binding (and code) try to use the closest parameters required by the NAND chip: we pick the "optimal" configuration. So if you don't provide any value here, we expect the strength and step size advertized by the chip to be used. This is a common default in the raw NAND subsystem. Please drop the default line, re-integrate the missing R-by tag from Rob and in a separate patch please mark nand-ecc-step-size and nand-ecc-strength mandatory if the other is provide. IOW, we expect either both, or none of them, but not a single one. > =20 > nand-ecc-strength: > enum: [8, 16, 24, 30, 40, 50, 60] > @@ -93,6 +94,7 @@ examples: > nand@0 { > reg =3D <0>; > nand-rb =3D <0>; > + nand-ecc-step-size =3D <1024>; So in the end this line is wrong and once you get the description right as I mentioned it above, this will fail to pass `make DT_SCHEMA_FILES=3DDocumentation/devicetree/bindings/mtd/ dt_binidng_c= heck` Please drop it from the example, don't add the second property here, it's best to show a clean example where people stop tampering for no reason with the optimal values. > }; > }; > =20 Thanks, Miqu=C3=A8l