mel@mel:~$ lsblk
NAME         MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
loop0          7:0    0    16M  1 loop 
mmcblk0      179:0    0  14,7G  0 disk 
├─mmcblk0p1  179:1    0    14G  0 part /
├─mmcblk0p2  179:2    0     1M  0 part 
├─mmcblk0p3  179:3    0     6M  0 part 
├─mmcblk0p4  179:4    0    80K  0 part 
├─mmcblk0p5  179:5    0    64M  0 part 
├─mmcblk0p6  179:6    0     1M  0 part 
├─mmcblk0p7  179:7    0     6M  0 part 
├─mmcblk0p8  179:8    0    80K  0 part 
├─mmcblk0p9  179:9    0    64M  0 part 
├─mmcblk0p10 179:10   0   192K  0 part 
├─mmcblk0p11 179:11   0   256K  0 part 
├─mmcblk0p12 179:12   0    63M  0 part 
├─mmcblk0p13 179:13   0   512K  0 part 
├─mmcblk0p14 179:14   0   256K  0 part 
├─mmcblk0p15 179:15   0   256K  0 part 
├─mmcblk0p16 179:16   0   300M  0 part 
└─mmcblk0p17 179:17   0 185,4M  0 part 
mmcblk0boot0 179:32   0     4M  1 disk 
mmcblk0boot1 179:64   0     4M  1 disk 
mmcblk0rpmb  179:96   0     4M  0 disk 
mmcblk1      179:128  0  59,5G  0 disk 
└─mmcblk1p1  179:129  0  59,5G  0 part /media/mel/sdcard
zram0        252:0    0 495,5M  0 disk [SWAP]
zram1        252:1    0 495,5M  0 disk [SWAP]
zram2        252:2    0 495,5M  0 disk [SWAP]
zram3        252:3    0 495,5M  0 disk [SWAP]
mel@mel:~$ cat /sys/kernel/debug/mmc1/clock
cat: /sys/kernel/debug/mmc1/clock: Permission denied
mel@mel:~$ sudo cat /sys/kernel/debug/mmc1/clock
[sudo] password for mel: 
204000000
mel@mel:~$ sudo cat /sys/kernel/debug/mmc1/ios
clock:		204000000 Hz
vdd:		21 (3.3 ~ 3.4 V)
bus mode:	2 (push-pull)
chip select:	0 (don't care)
power mode:	2 (on)
bus width:	2 (4 bits)
timing spec:	6 (sd uhs SDR104)
signal voltage:	1 (1.80 V)
driver type:	0 (driver type B)
mel@mel:~$ sudo cat /sys/kernel/debug/mmc1/speed
0
mel@mel:~$