linux-kernel - Re: [PATCH 09/14] Blackfin SPI driver: Fix SPI driver to work with SPI flash ST25P16 on bf548

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Message-Id: <200710311314.00465.david-b@pacbell.net>
Date:	Wed, 31 Oct 2007 13:14:00 -0700
From:	David Brownell <david-b@...bell.net>
To:	"Mike Frysinger" <vapier.adi@...il.com>
Cc:	spi-devel-general@...ts.sourceforge.net, bryan.wu@...log.com,
	"Sonic Zhang" <sonic.zhang@...log.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/14] Blackfin SPI driver: Fix SPI driver to work with SPI flash ST25P16 on bf548

> > > pretty much all SPI flashes have two read commands ("slow" and "fast"
> > > as they're typically called).
> >
> > Not DataFlash.
> 
> doesnt it ?  AT45DB642D says 0x0B is fast (up to 66mhz) while 0x03 (up to 33mhz)

And ...041B, ...081B, ...161B, ...321, ...321C, and others don't.
(From a quick scan of datasheets I have locally...)

Those 0x0B and 0x03 commands are "new", and have never been
used by the Linux DataFlash drivers.

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