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From: Michael Walle <michael@walle.cc>
To: Tudor.Ambarus@microchip.com
Cc: biju.das.jz@bp.renesas.com, p.yadav@ti.com,
	miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com,
	Nicolas.Ferre@microchip.com, alexandre.belloni@bootlin.com,
	Claudiu.Beznea@microchip.com, linux-mtd@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org, geert+renesas@glider.be,
	Chris.Paterson2@renesas.com, biju.das@bp.renesas.com,
	prabhakar.mahadev-lad.rj@bp.renesas.com,
	linux-renesas-soc@vger.kernel.org
Subject: Re: [PATCH v2 2/2] mtd: spi-nor: Add Renesas AT25QL128A serial nor flash
Date: Thu, 21 Jul 2022 11:43:04 +0200	[thread overview]
Message-ID: <2335e23aff8406e959d1d14cecb2d6a1@walle.cc> (raw)
In-Reply-To: <785e50c4-3c8c-a1a6-de60-4587aef820a8@microchip.com>

Am 2022-07-21 11:39, schrieb Tudor.Ambarus@microchip.com:
>> cat 
>> /sys/devices/platform/soc/10060000.spi/rpc-if-spi/spi_master/spi1/spi1.0/spi-nor/jedec_id
>> 1f42181f4218
>> 
>> This result is not matching 1f4218->1f42181f4218
> 
> here it looks like the ID is sent twice.

That is expected. We don't know how long the id is so
SPI_NOR_MAX_ID_LEN bytes are read for now.
Some flashes will send additional information, some don't and
just repeat the pattern.

It's up to the userspace to interpret that.

-michael

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  reply	other threads:[~2022-07-21  9:43 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-15 10:57 [PATCH v2 0/2] Add Renesas AT25QL128A serial nor flash Biju Das
2022-07-15 10:57 ` [PATCH v2 1/2] mtd: spi-nor: Add support for SNOR_ID3 macro Biju Das
2022-07-15 11:57   ` Michael Walle
2022-07-18  5:53     ` Biju Das
2022-07-15 10:57 ` [PATCH v2 2/2] mtd: spi-nor: Add Renesas AT25QL128A serial nor flash Biju Das
2022-07-15 11:55   ` Michael Walle
2022-07-19  8:53     ` Pratyush Yadav
2022-07-21  8:28   ` Tudor.Ambarus
2022-07-21  8:48     ` Biju Das
2022-07-21  9:23     ` Biju Das
2022-07-21  9:39       ` Tudor.Ambarus
2022-07-21  9:43         ` Michael Walle [this message]
2022-07-21  9:46         ` Biju Das
2022-07-21 10:00           ` Michael Walle

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