root@orangepipcplus:~# dmesg | grep -i mmc
[ 0.000000] Kernel command line: root=UUID=1d000aec-4bfa-4c75-80fd-d3325d028c19 rootwait rootfstype=ext4 console=tty1 console=ttyS0,115200 hdmi.audio=EDID:0 disp.screen0_output_mode=1920x1080p60 panic=10 consoleblank=0 loglevel=1 ubootpart=14996962-01 ubootsource=mmc usb-storage.quirks=0x2537:0x1066:u,0x2537:0x1068:u sunxi_ve_mem_reserve=0 sunxi_g2d_mem_reserve=0 sunxi_fb_mem_reserve=16 cgroup_enable=memory swapaccount=1
[ 1.149647] sunxi-mmc 1c0f000.mmc: Got CD GPIO
[ 1.173457] sunxi-mmc 1c0f000.mmc: base:0xf1005000 irq:25
[ 1.198452] sunxi-mmc 1c11000.mmc: base:0xf100d000 irq:27
[ 1.231051] mmc0: host does not support reading read-only switch, assuming write-enable
[ 1.234244] mmc0: new high speed SDHC card at address aaaa
[ 1.234944] mmcblk0: mmc0:aaaa SS16G 14.8 GiB
[ 1.236264] mmcblk0: p1
[ 2.082541] sunxi-mmc 1c10000.mmc: allocated mmc-pwrseq
[ 2.106529] sunxi-mmc 1c10000.mmc: base:0xf10e8000 irq:26
[ 2.131226] mmc2: new high speed SDIO card at address 0001
[ 2.879474] EXT4-fs (mmcblk0p1): mounted filesystem with writeback data mode. Opts: (null)
[ 4.681498] EXT4-fs (mmcblk0p1): re-mounted. Opts: commit=600,errors=remount-ro