Messages in this thread | | | From | Wolfgang Denk <> | Subject | Re: [PATCH] [PowerPC] MPC8272ADS: fix device tree for 8 MB flash size | Date | Wed, 13 May 2009 21:42:49 +0200 |
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Dear Li Yang,
In message <2a27d3730905130328m27743852w2d68a62ebc32ce31@mail.gmail.com> you wrote: > > Although 8MB seems to be the common size used. It can be very easy > changed as a pluggable module. It might be better to make the code > working for any reasonable flash sizes.
You either have to provide a correct device tree for your board, or use a boot loader / boot wrapper that fixes the flash base address and size.
At the moment, U-Boot does not contain any code yet to do that (patches welcome :-), and as far as I understand the cuImage wrapper works just the other way round: it adjusts the mappings to the settings in the device tree, which may or may not match the actual hardware. This may work, but at least gives you a different flash memory map in Linux than what you had before in U-Boot, so it's not really nice either.
Hm... it seems the majority of MPC8272ADS boards seems to come indeed with 8 MB NOR flash, so I wonder if the patch should actually go in?
Best regards,
Wolfgang Denk
-- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de In accord with UNIX philosophy, Perl gives you enough rope to hang yourself. - L. Wall & R. L. Schwartz, _Programming Perl_
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