From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Packham Date: Tue, 07 Sep 2010 15:05:42 -0700 Subject: [U-Boot] Handling dual die and single die flash on same board In-Reply-To: <201009071926.04557.sr@denx.de> References: <4C8670EA.5010501@gmail.com> <201009071926.04557.sr@denx.de> Message-ID: <4C86B736.2060900@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On 07/09/10 10:26, Stefan Roese wrote: > Hi Chris, > > On Tuesday 07 September 2010 19:05:46 Chris Packham wrote: >> My u-boot config is currently setup for the 2x32MB case i.e. >> CONFIG_SYS_MAX_FLASH_BANKS = 2, CONFIG_SYS_FLASH_BANKS_LIST = {base, >> base+32MB}. The problem with this is that when flash_get_size is called >> on the 1x64 chip it discovers the same chip the 2nd time around and >> promptly walks off the end of the memory area I have allocated for it. >> >> Is there any existing way to make the cfi_flash driver handle this >> situation for me? > > I just recently sent a patchset for the CFI driver that could help to handle > such a situation. Here the most interesting patch: > > http://www.mail-archive.com/u-boot at lists.denx.de/msg37234.html > > I would suggest to set CONFIG_SYS_MAX_FLASH_BANKS_DETECT to 2 and then add > some board specific code to determine the real bank count and set > cfi_flash_num_flash_banks accordingly. > Thanks for the pointers. For now I've followed the example in tqm834x.c. I've done it in such a way that when we next pull in upstream u-boot it should co-exists nicely with your proposed patch.