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x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-GND-Sasl: miquel.raynal@bootlin.com Hi Arseniy, avkrasnov@salutedevices.com wrote on Wed, 10 Apr 2024 17:48:02 +0300: > Hi, >=20 > On 10.04.2024 13:23, Miquel Raynal wrote: > > Hi Arseniy, > >=20 > > avkrasnov@salutedevices.com wrote on Tue, 9 Apr 2024 21:10:24 +0300: > > =20 > >> Boot ROM code on Meson requires that some pages on NAND must be written > >> in special mode: "short" ECC mode where each block is 384 bytes and > >> scrambling mode is on. Such pages located with the specified interval > >> within specified offset. Both interval and offset are located in the > >> device tree and used by driver if 'nand-is-boot-medium' is set for > >> NAND chip. > >> > >> Signed-off-by: Arseniy Krasnov > >> --- > >> .../bindings/mtd/amlogic,meson-nand.yaml | 14 ++++++++++++++ > >> 1 file changed, 14 insertions(+) > >> > >> diff --git a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.= yaml b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml > >> index 57b6957c8415..b86a1953056b 100644 > >> --- a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml > >> +++ b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml > >> @@ -64,11 +64,25 @@ patternProperties: > >> items: > >> maximum: 0 > >> =20 > >> + amlogic,boot-page-last: > >> + $ref: /schemas/types.yaml#/definitions/uint32 > >> + description: > >> + The NFC driver needs this information to select ECC > >> + algorithms supported by the boot ROM. =20 > >=20 > > Shall we have a length rather than the last page? =20 >=20 > You mean rename it to "amlogic,boot-pages-length" or something like that = ? But I think > length in bytes is useless here: > 1) boot rom needs that only some single pages are written in special mode= (and as I see in > vendor's driver it also works in pages). > 2) NAND driver operates in pages during write/read such pages. >=20 > So length in bytes will be converted to pages anyway. >=20 > What do You think ? I didn't talk about units :-) Maybe: amlogic,boot-pages would make sense? But pointing at the last page seems weird. Miqu=C3=A8l