linux-kernel - Re: [PATCH v2 1/2] mtd: spi-nor: core: Introduce SPI_NOR_SOFT_RESET flash_info fixup

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Date:   Fri, 17 Dec 2021 16:12:14 +0530
From:   Pratyush Yadav <p.yadav@...com>
To:     Tudor Ambarus <tudor.ambarus@...rochip.com>
CC:     <michael@...le.cc>, <vigneshr@...com>, <miquel.raynal@...tlin.com>,
        <richard@....at>, <linux-mtd@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <nicolas.ferre@...rochip.com>,
        <zhengxunli@...c.com.tw>, <jaimeliao@...c.com.tw>
Subject: Re: [PATCH v2 1/2] mtd: spi-nor: core: Introduce SPI_NOR_SOFT_RESET
 flash_info fixup_flag

On 09/12/21 09:04PM, Tudor Ambarus wrote:
> 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>

-- 
Regards,
Pratyush Yadav
Texas Instruments Inc.