linux-kernel - Re: [PATCH] mtd: spi-nor: Support Dual and Quad Read on Macronix mx25u25635f

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Message-ID: <34eccc66cc75dd0ffbf8a77780b6f8a7@walle.cc>
Date:   Fri, 13 May 2022 13:11:14 +0200
From:   Michael Walle <michael@...le.cc>
To:     Alexander A Sverdlin <alexander.sverdlin@...ia.com>
Cc:     linux-mtd@...ts.infradead.org,
        Tudor Ambarus <tudor.ambarus@...rochip.com>,
        Pratyush Yadav <p.yadav@...com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mtd: spi-nor: Support Dual and Quad Read on Macronix
 mx25u25635f

Hi,

Am 2022-05-13 11:47, schrieb Alexander A Sverdlin:
> From: Alexander Sverdlin <alexander.sverdlin@...ia.com>
> 
> According to datasheet both Dual and Quad Read is supported. The read 
> test
> shows x3.8 speed gain.

Does it have SFDP? Try adding PARSE_SFDP instead of the
NO_SFDP_FLAGS.

Please post an SFDP dump of this flash [1].

-michael

[1] 
https://lore.kernel.org/linux-mtd/4304e19f3399a0a6e856119d01ccabe0@walle.cc/