linux-kernel - Re: [PATCH 1/2] mtd: spinand: Add support for 5-byte IDs

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Date: Mon,  5 Feb 2024 15:28:04 +0100
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Ezra Buehler <ezra@...yb.ch>,
	linux-mtd@...ts.infradead.org
Cc: Miquel Raynal <miquel.raynal@...tlin.com>,
	Chuanhong Guo <gch981213@...il.com>,
	Dmitry Rokosov <ddrokosov@...rdevices.ru>,
	Martin Kurbanov <mmkurbanov@...rdevices.ru>,
	Md Sadre Alam <quic_mdalam@...cinc.com>,
	Richard Weinberger <richard@....at>,
	Sridharan S N <quic_sridsn@...cinc.com>,
	Vignesh Raghavendra <vigneshr@...com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] mtd: spinand: Add support for 5-byte IDs

On Thu, 2024-01-25 at 20:01:07 UTC, Ezra Buehler wrote:
> From: Ezra Buehler <ezra.buehler@...qvarnagroup.com>
> 
> E.g. ESMT chips will return an identification code with a length of 5
> bytes. In order to prevent ambiguity, flash chips would actually need to
> return IDs that are up to 17 or more bytes long due to JEDEC's
> continuation scheme. I understand that if a manufacturer ID is located
> in bank N of JEDEC's database (there are currently 16 banks), N - 1
> continuation codes (7Fh) need to be added to the identification code
> (comprising of manufacturer ID and device ID). However, most flash chip
> manufacturers don't seem to implement this (correctly).
> 
> Signed-off-by: Ezra Buehler <ezra.buehler@...qvarnagroup.com>
> Reviewed-by: Martin Kurbanov <mmkurbanov@...utedevices.com>
> Tested-by: Martin Kurbanov <mmkurbanov@...utedevices.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next, thanks.

Miquel