On Thu, Nov 21, 2013 at 12:57:10PM -0500, Richard Retanubun wrote: > On 21/11/13 11:49 AM, Tom Rini wrote: > >On Wed, Nov 20, 2013 at 05:27:50PM -0500, Richard Retanubun wrote: > >>The only way I can get raw eMMC boot mode to work is if I put the MLO > >>on /dev/mmcblk1 (which is the user data area). > > > >Did you change the SYSBOOT pins to use automotive peripheral mode, > >rather than user data? If you did, you should see an error from MLO > >saying that you came in from an unsupported boot device (since we don't > >have the value of what ROM tells us for when we come in that way defined > >in arch/arm/include/asm/arch-omap5/spl.h). Or there is some other > >problem. > I did try both SYSBOOT for automotive peripheral mode.. > I wished it did say something (even if it is an error message). > My problem is that it does not display anything at all. > So, I think I fall under the "some other problem" category. :) > > >Also note that U-Boot defaults to using these "boot" > >partitions for storing the environment so you will need to change that > >part of the config once you use these partitions for something else. > > > Thank you for the heads up. I'll watch out for this when I get to this phase. > > Tom, since you're both the u-boot-arm maintainer and happens to work for TI, > do you know the e.t.a of mainlining the /drivers/mmc/spl_mmc.c and the related > code needed to boot from eMMC in raw mode into denx-master? > > I rather stick with denx-master mainline if at all possible, > but right now the functionality only exist in p-ti-u-boot-2013.04, right?
I've done RAW mode booting on my omap5_uevm as well as am335x-based platforms, on SD card and eMMC. But in the case of eMMC it's always the user partitions. I suspect the answer is that for automotive booting you need silicon that supports that, much like the difference between HS and GP devices. I'm not sure what code in p-ti-u-boot-2013.04 hasn't been merged to mainline but if you can give me some pointers I can go and poke some folks. -- Tom
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