linux-kernel - Re: [PATCH v4 1/2] mtd: spi-nor: core: Introduce SPI_NOR_SOFT_RESET flash_info fixup

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Message-ID: <11ba36ee085bb9e3e262dd5bbef4dd23@walle.cc>
Date:   Mon, 20 Dec 2021 14:12:28 +0100
From:   Michael Walle <michael@...le.cc>
To:     Tudor Ambarus <tudor.ambarus@...rochip.com>
Cc:     p.yadav@...com, miquel.raynal@...tlin.com, richard@....at,
        vigneshr@...com, linux-mtd@...ts.infradead.org,
        linux-kernel@...r.kernel.org, nicolas.ferre@...rochip.com
Subject: Re: [PATCH v4 1/2] mtd: spi-nor: core: Introduce SPI_NOR_SOFT_RESET
 flash_info fixup_flag

Am 2021-12-17 18:33, schrieb Tudor Ambarus:
> The Soft Reset and Rescue Sequence Support is defined in BFPT_DWORD(16)
> starting with JESD216A. The first version of SFDP, JESD216 (April 
> 2011),
> defines just the first 9 BFPT DWORDS, thus it does not contain 
> information
> about the Software Reset and Rescue Support. Since this support can not
> be discovered by parsing the first SFDP version, introduce a flash_info
> fixup_flag that will be used either by flashes that define
> JESD216 (April 2011) or by flashes that do not define SFDP at all.
> In case a flash defines BFPT_DWORD(16) but with wrong values, one 
> should
> instead use a post_bfpt() hook and set SNOR_F_SOFT_RESET.
> 
> Signed-off-by: Tudor Ambarus <tudor.ambarus@...rochip.com>
> Reviewed-by: Pratyush Yadav <p.yadav@...com>

Reviewed-by: Michael Walle <michael@...le.cc>