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From: Champ, Andy <andycham@amazon.co.uk>
To: u-boot@lists.denx.de
Subject: [U-Boot] Macronix NOR_SPI and Quad I/O
Date: Fri, 25 Nov 2016 16:37:17 +0000	[thread overview]
Message-ID: <1480091837674.61259@amazon.co.uk> (raw)

Hi all,


in the table in drivers/mtd/spi/spi_flash_ids.c there is a flag WR_QPP set against Macronix devices (including the ones Dumitru is just adding).


This is used when programming the devices on a 4-bit bus to select the command to use for programming - either CMD_QUAD_PAGE_PROGRAM (0x32) or CMD_PAGE_PROGRAM (0x2).


The Macronix devices that I have a spec for do not mention command 0x32. Each of the devices that I have a spec for ( MX25L25635F MX25U51245G MX25V8035F and MX25V1635F ) use command 0x38 instead.


This would suggest to me that devices that support quad I/O, and have Macronix NOR-SPI, won't be able to program them.


Am I missing something, or is this a problem?


I'm not able to check because we don't use Quad I/O.


Regards

Andy Champ

Amazon Lab126

Cambridge, UK.

             reply	other threads:[~2016-11-25 16:37 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-25 16:37 Champ, Andy [this message]
2016-11-26  3:13 ` [U-Boot] Macronix NOR_SPI and Quad I/O Jagan Teki
2016-11-28  6:17   ` Chin Liang See
2016-11-28  9:59   ` Champ, Andy
2016-11-28 15:49     ` Bacrau, Dumitru
2016-11-28 15:59       ` Champ, Andy
2016-11-28 17:33         ` Bacrau, Dumitru
2016-11-28 17:47           ` Champ, Andy

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