From: Timur Tabi <timur@freescale.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] What is CONFIG_HAS_DATAFLASH?
Date: Fri, 05 Mar 2010 14:46:53 -0600 [thread overview]
Message-ID: <4B916DBD.7050105@freescale.com> (raw)
In-Reply-To: <20100305204301.69038E502AE@gemini.denx.de>
Wolfgang Denk wrote:
>> This doesn't tell me anything.
>
> Hm... What exactly don't you understand here?
Well, I was just wondering what the connection is between DataFlash (which is some flash technology that I don't know much about) and the md command.
> Why are plain simple memory accesses not possible on your hardware?
> Which architecture / CPU is this?
Because on this one chip I'm working on, the designers decided to mux the LBC address lines with the video signal from the on-board display driver. No, I'm not kidding about that. That means that when you're using the video display, you can't access flash. CONFIG_CFI_FLASH_USE_WEAK_ACCESSORS will allow the saveenv command to continue working under this situation.
--
Timur Tabi
Linux kernel developer at Freescale
next prev parent reply other threads:[~2010-03-05 20:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-05 17:15 [U-Boot] What is CONFIG_HAS_DATAFLASH? Timur Tabi
2010-03-05 19:17 ` Wolfgang Denk
2010-03-05 19:23 ` Timur Tabi
2010-03-05 20:43 ` Wolfgang Denk
2010-03-05 20:46 ` Timur Tabi [this message]
2010-03-08 16:02 ` Detlev Zundel
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