On Sun, Dec 23, 2018 at 10:17 AM Tony Lindgren <tony@xxxxxxxxxxx> wrote: > > * Adam Ford <aford173@xxxxxxxxx> [181222 20:17]: > > This fixes an issue where the MMC errors our during boot which > > requires the user to eject and re-insert the MMC. > > > > The bootloader has been updated for a while to correct set the > > pbias for the GPIO pins. Kernels 4.20-RC1+ are getting hung up > > on intializing the MMC. Removing the duplicative PBIAS setting > > appears to eliminate the issue. > > Hmm I wonder if the root cause might be some PBIAS regulator > regression between v4.19 and v4.20-rc series? Possibly, but I haven't bisected it, but do you think this is even necessary if the bootloader correctly addresses this now? If anything, pdata quirks seems to me to be the wrong place, and we should add the IO disable/enable features into the pbias driver. I'd like to get this applied for 4.20.1 if possible, but I understand if you want more investigation. I am just not sure when I can get to it. As of right now, 4.20 doesn't properly boot the Torpedo board without ejecting and reinserting the card. adam > > Regards, > > Tony
