linux-kernel - Re: [PATCH v11 07/10] mtd: spi-nor: Add stacked memories support in spi-nor

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Message-ID: <797b9023-e56b-404b-bb4e-6e178b7ada88@linaro.org>
Date:   Thu, 7 Dec 2023 17:24:48 +0000
From:   Tudor Ambarus <tudor.ambarus@...aro.org>
To:     Amit Kumar Mahapatra <amit.kumar-mahapatra@....com>,
        broonie@...nel.org, pratyush@...nel.org, miquel.raynal@...tlin.com,
        richard@....at, vigneshr@...com, sbinding@...nsource.cirrus.com,
        lee@...nel.org, james.schulman@...rus.com, david.rhodes@...rus.com,
        rf@...nsource.cirrus.com, perex@...ex.cz, tiwai@...e.com
Cc:     linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org,
        michael@...le.cc, linux-mtd@...ts.infradead.org,
        nicolas.ferre@...rochip.com, alexandre.belloni@...tlin.com,
        claudiu.beznea@...on.dev, michal.simek@....com,
        linux-arm-kernel@...ts.infradead.org, alsa-devel@...a-project.org,
        patches@...nsource.cirrus.com, linux-sound@...r.kernel.org,
        git@....com, amitrkcian2002@...il.com
Subject: Re: [PATCH v11 07/10] mtd: spi-nor: Add stacked memories support in
 spi-nor



On 11/25/23 09:21, Amit Kumar Mahapatra wrote:
> The current implementation assumes that a maximum of two flashes are
> connected in stacked mode and both the flashes are of same make but can
> differ in sizes. So, except the sizes all other flash parameters of both
> the flashes are identical.

Too much restrictions, isn't it? Have you thought about adding a layer
on top of SPI NOR managing the stacked/parallel flashes?