On Feb 13, 2007, at 9:08 AM, Laurent Pinchart wrote: > Hi everybody, > > I'm running Linux 2.6.20 on an MPC8248 using arch/ppc/. > > The system flash is divided in 5 partitions, which are currently > defined in > both U-Boot and in the Linux kernel (hardcoded in platform specific > code in > arch/ppc/platforms/). This is error prone, as modifying partition > information > requires a change to the U-Boot environment variables and a > recompilation of > the Linux kernel. > > I would like to get rid of partition data in the kernel. I found 3 > ways for > the Linux kernel to get those data from elsewhere: > > - command line parsing (using the mtdparts argument) > - redboot partition table parsing > - OF device tree (drivers/mtd/maps/physmap_of.c) > > What is the best suited method ? I don't really like the redboot > partition > table, is I haven't found any way to write it from U-Boot. Do I > need to > switch to arch/powerpc/ to use the OF device tree ? If so, is it > possible > today for the MPC8248 processor, or is it still badly supported in > arch/powerpc/ ? Last but not least, is it possible to change the OF > device > tree from U-Boot at runtime to resize partitions ?
You'll have to switch to arch/powerpc for using the of device tree parsing. I believe the 8248/827x are supported under arch/powerpc at this point. I don't believe its possible to change the OF device tree at runtime currently, you'll have to add code to u-boot to do that. U-boot does very little with the device tree beyond setting it up and filling in some values that are needed (memory sizes, frequencies, etc.) - k _______________________________________________ Linuxppc-embedded mailing list [email protected] https://ozlabs.org/mailman/listinfo/linuxppc-embedded
