linux-kernel - Re: [PATCH v3 14/15] mtd: spi-nor: Drop deprecated mechanism for optional SFDP parsing

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Message-ID: <874j8vvu96.fsf@geanix.com>
Date: Fri, 12 Jul 2024 11:23:33 +0200
From: Esben Haabendal <esben@...nix.com>
To: Tudor Ambarus <tudor.ambarus@...aro.org>
Cc: Pratyush Yadav <pratyush@...nel.org>,  Michael Walle
 <mwalle@...nel.org>,  Miquel Raynal <miquel.raynal@...tlin.com>,  Richard
 Weinberger <richard@....at>,  Vignesh Raghavendra <vigneshr@...com>,
  Nicolas Ferre <nicolas.ferre@...rochip.com>,  Alexandre Belloni
 <alexandre.belloni@...tlin.com>,  Claudiu Beznea
 <claudiu.beznea@...on.dev>,  linux-mtd@...ts.infradead.org,
  linux-kernel@...r.kernel.org,  Rasmus Villemoes
 <rasmus.villemoes@...vas.dk>,  linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 14/15] mtd: spi-nor: Drop deprecated mechanism for
 optional SFDP parsing

Esben Haabendal <esben@...nix.com> writes:

> With all drivers converted to the new SPI_NOR_TRY_SFDP flag, we can remove
> the old deprecated mechanism for triggering optional SFDP parsing.
>
> New flashes must use SPI_NOR_TRY_SFDP to get this behavior. Hopefully, all
> new drivers will be fore pure SFDP flashes, so no or at least very few new
> users of this flag is expected.
>
> Signed-off-by: Esben Haabendal <esben@...nix.com>
> ---
>  drivers/mtd/spi-nor/core.h | 19 +------------------
>  1 file changed, 1 insertion(+), 18 deletions(-)
>
> diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h
> index dfc81716e068..f4a76f42051a 100644
> --- a/drivers/mtd/spi-nor/core.h
> +++ b/drivers/mtd/spi-nor/core.h
> @@ -719,24 +719,7 @@ static inline bool spi_nor_needs_sfdp(const struct spi_nor *nor)
>   */
>  static inline bool spi_nor_try_sfdp(const struct spi_nor *nor)
>  {
> -	if (nor->info->no_sfdp_flags & SPI_NOR_SKIP_SFDP)
> -		return false;
> -	if (nor->info->no_sfdp_flags & SPI_NOR_TRY_SFDP)
> -		return true;
> -
> -	/* Deprecated/legacy way for triggering optional SFDP parsing.
> -	 * If one of the no_sfdp_flags indicating dual, quad or octal read is
> -	 * set, SFDP parsing will be tried.
> -	 * When all drivers have been converted to set SPI_NOR_TRY_SFDP where
> -	 * needed, this deprecated mechanism can be removed.
> -	 */
> -	if (nor->info->no_sfdp_flags & (SPI_NOR_DUAL_READ |
> -					SPI_NOR_QUAD_READ |
> -					SPI_NOR_OCTAL_READ |
> -					SPI_NOR_OCTAL_DTR_READ))
> -		return true;
> -
> -	return false;
> +	return (nor->info->no_sfdp_flags & SPI_NOR_TRY_SFDP)

Sorry. Bad cherry-pick here. Due to other reasons, I am testing out of
tree :(  The missing semicolon will be added in v4.

I assume we can still discuss the idea here in this version.

/Esben