/dev # dmesg | grep "sdhc"
[    0.279108] sdhci: Secure Digital Host Controller Interface driver
[    0.279117] sdhci: Copyright(c) Pierre Ossman
[    0.279526] sdhci-pltfm: SDHCI platform and OF driver helper
[    0.421414] mmc1: SDHCI controller on 4784000.sdhci [4784000.sdhci] using ADMA 64-bit