On Fri, 2014-03-21 at 08:53 -0500, Robert Nelson wrote: > On Fri, Mar 21, 2014 at 8:33 AM, Peter Robinson <[email protected]> wrote: > >>> I admit I gave up too easily yesterday, built a Robert Nelson 3.12.13 > >>> and got my F20 image going with that. After I got running, I did update > >>> the Fedora kernel to current 3.13.6 and tried to boot that. Same > >>> problem, mmc driver not loading. I'll try to get to the bottom of this > >>> afternoon. I'll diff the fedora/RN kernel config and see if anything > >>> jumps out. If not, I'll start looking at am3* dts/dtsi files.... > >>> > >>> Robert, if you're reading this, don't suppose you can point me in the > >>> direction of where to start looking? ;) > >> > >> v3.13.x pretty much works out of the box, so no dts/dtsi changes are > >> necessary.. > >> > >> I'd first start looking at make sure the mmc driver is setup: > >> > >> CONFIG_TI_EDMA=y > >> CONFIG_DMA_ENGINE=y > > > > We've always had that, the BBBlack wouldn't work without it either and > > the BBBlack works fine. It's like it needs a different regulator or > > something. > > Okay, that's weirder then. They both share the same tps65217 > regulator. The black has one regulator (ldo3_reg) that's different, > but it should be taken care of in the dts.
Thanks, Robert. tps65217 was the clue I needed. Fedora config has it building as a module. But the module is not included in the initramfs, so not available at boot time. Solution: Either rebuild the Fedora kernel with "CONFIG_REGULATOR_TPS65217=y" or edit /etc/dracut.conf, 'add_drivers +="tps65217-regulator"' and rebuild initramfs/uinitrd, gets the Fedora kernel booting. Now need to figure out where the power management has gone. I suspect your kernels have it built-in and Fedora has "CONFIG_XXX=m", so more module nonsense. Regards Clive -- Clive Messer <[email protected]> _______________________________________________ arm mailing list [email protected] https://admin.fedoraproject.org/mailman/listinfo/arm
