On Fri, Mar 23, 2018 at 9:30 AM, Jeff Andich <[email protected]> wrote: > Hey Robert, > > The EEPROM is mostly board ID, serial number, and Ethernet MAC addresses > right? There isn't anything which is DRAM-specific in EEPROM, right? > > My understanding is the EEPROM contains the board ID which u-boot-spl and > u-boot use to customize the configurations for each specific board... I > understand that most of the board-specific changes are contained in the > board.c file, but I'm wondering if there are other critical configurations > in the /arch/arm/mach-omap2 directory. I also added some configurations for > our custom board type to the Kconfig in the mach-omap2 directory. This > looks to be menu options for a makemenuconfig GUI like for the kernel?? > > > Have asked the TI folks on the above-referenced E2E post if there's a DDR3 > test tool which can be run for an extended test. > > The guy on E2E who's having a similar issue, implied that his firmware > engineers already tuned the IO Delays. Maybe it's something else?? > > I wonder who the people are who actually derive the IO delays (e.g. the > GDELAY equtions) and tune them for boards like the BB-X15.. How does that > process work?? Maybe that's in TI's SPRAC44 ap note.. I still wonder, how > do you know when you've hit the sweet spot in terms of the optimum values?? > > This doesn't appear to happen very frequently, but it's probably prudent to > get a handle on what makes it crop up..
We got our magic numbers directly from TI.. Thus, i'm not sure how they were generated... Regards, -- Robert Nelson https://rcn-ee.com/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAOCHtYhkTHxF5R9vJjpZEgaNCSEVa%3DbLxaG917LBu8CACJs8Pg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
