From mboxrd@z Thu Jan 1 00:00:00 1970 From: Timur Tabi Date: Fri, 05 Mar 2010 14:46:53 -0600 Subject: [U-Boot] What is CONFIG_HAS_DATAFLASH? In-Reply-To: <20100305204301.69038E502AE@gemini.denx.de> References: <20100305191744.90796E4716D@gemini.denx.de> <4B915A1F.90206@freescale.com> <20100305204301.69038E502AE@gemini.denx.de> Message-ID: <4B916DBD.7050105@freescale.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.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