Hey, I have connected an eMMC to sdhci0 and a uSD Card to sdhci1 of a Zynq. while the uSD Card seams to work fine i'm getting the error arasan-sdhci e0100000.mmc@xxxxxxxxxxx: registered as mmc0 arasan-sdhci e0100000.mmc@xxxxxxxxxxx: SDHCI_INT_ERROR: 0x00000001 arasan-sdhci e0100000.mmc@xxxxxxxxxxx: error while transfering data for command 8 arasan-sdhci e0100000.mmc@xxxxxxxxxxx: state = 0x01ff0001 , interrupt = 0x00018000 arasan-sdhci e0100000.mmc@xxxxxxxxxxx: SDHCI_INT_ERROR: 0x00000001 arasan-sdhci e0100000.mmc@xxxxxxxxxxx: error while transfering data for command 55 arasan-sdhci e0100000.mmc@xxxxxxxxxxx: state = 0x01ff0001 , interrupt = 0x00018000 from the eMMC. arasan-sdhci e0101000.mmc@xxxxxxxxxxx: registered as mmc1 mmc1: detected SD card version 2.0 mmc1: registered mmc1 both eMMC and SDCard work fine in Linux. So I think the Problem is some confuguration difference between Linux and barebox. The MMC is from type MTFC8G but Linux detects it as [ 2.012122] mmc0: new high speed MMC card at address 0001 [ 2.021129] mmcblk0: mmc0:0001 Q2J55L 7.09 GiB [ 2.026355] Btrfs loaded, crc32c=crc32c-generic, zoned=no, fsverity=no [ 2.027458] mmcblk0boot0: mmc0:0001 Q2J55L 16.0 MiB [ 2.031509] mmcblk0boot1: mmc0:0001 Q2J55L 16.0 MiB [ 2.039829] mmcblk0rpmb: mmc0:0001 Q2J55L 4.00 MiB, chardev (245:0) Unfortunattly I'm not very familliar with SDHCI, so I would apreciate any help. Best Regards Michael