linux-kernel - Re: [PATCH v2] mtd: spi-nor: Correct flags for Winbond w25q128

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Date:   Tue, 18 Jul 2023 13:58:01 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Tudor Ambarus <tudor.ambarus@...aro.org>
Cc:     Michael Walle <michael@...le.cc>,
        Pratyush Yadav <pratyush@...nel.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH v2] mtd: spi-nor: Correct flags for Winbond w25q128

On Tue, Jul 18, 2023 at 11:47 AM Tudor Ambarus <tudor.ambarus@...aro.org> wrote:

> Hi, Linus,
>
> On 7/18/23 09:32, Michael Walle wrote:
> > FWIW, I'm fine with the removed no_sfdp_flags if INFO(, 0, 0, 0).
>
> We'll need a v5 where you test again the flash with mtd_utils,
> as we want to get rid of n_sectors and sectors_size and instead
> determine them from SFDP. We agreed that the flash entry should
> be defined with the following params:
>
>         { "w25q128", INFO(0xef4018, 0, 0, 0)
>                 PARSE_SFDP
>                 FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
>         },

Roger that!

I sent a v5 which does this, tested by taking the reported
size in dmesg and divide by reported (correct) eraseblock size and
it results in the same number of sectors as well.

I put the details into the commit message.

Yours,
Linus Walleij