linux-kernel - Re: [PATCH 1/3] mtd: spinand: Define OctalIO ops

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Message-ID: <87a5brlwa3.fsf@bootlin.com>
Date: Wed, 15 Jan 2025 20:19:48 +0100
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Santhosh Kumar K <s-k6@...com>
Cc: <richard@....at>,  <vigneshr@...com>,  <quic_sridsn@...cinc.com>,
  <quic_mdalam@...cinc.com>,  <linux-mtd@...ts.infradead.org>,
  <linux-kernel@...r.kernel.org>,  <p-mantena@...com>
Subject: Re: [PATCH 1/3] mtd: spinand: Define OctalIO ops

Hello Santhosh,

On 02/01/2025 at 17:21:08 +0530, Santhosh Kumar K <s-k6@...com> wrote:

> Define the macros for Octal-based read and load operations on OSPI
> NAND flashes.

Following a recent discussion with the SPI-NOR maintainers, I plan on
renaming some of these macros to make them more clear regarding what
they do. There are many ways to do octal transfers (data only, address
and data, all cycles, sdr vs dtr...) and we want to clarify that.

Also, I believe there are frequency limitations which are not correctly
declared and possibly some issues with the dummy cycles which need to be
clarified, especially in the Winbond driver.

I plan on working on this in the next weeks, once my head is clear about
the specificities with these chips. I will add you in Cc.

Cheers,
Miquèl