SD card cause system reboot with 32G class10 level

  1. The basic device tree change for enabling sdmmc3

  2. if sdmmc speed is slow. you need the patch here

  3. if tires warm boot, the speed becomes slow again. Need to add this patch in kernel

  4. if you don’t have SDMMC_VDD_EN gpio on their carrier board, then need to add “nvidia,vmmc-always-on” under sdhci device tree.

And lacking of (4) is a bad design that may have side effect.