cat /proc/devices
Character devices:
1 mem
5 /dev/tty
5 /dev/console
5 /dev/ptmx
10 misc
13 input
21 sg
29 fb
81 video4linux
86 ch
89 i2c
108 ppp
116 alsa
128 ptm
136 pts
153 spi
154 goodix_fp_spi
166 ttyACM
180 usb
188 ttyUSB
189 usb_device
216 rfcomm
222 wwan_ioctl
223 hidg
224 adsprpc-smd
225 sensors
226 avtimer
227 seemplog
228 ozwpan
229 jpeg0
230 BaseRemoteCtl
231 ttyGS
232 ccid_bridge
233 usbmon
234 usb_ext_chg
235 uio
236 icesdcc
237 qseecom
238 kgsl
239 smdpkt
240 dia
241 smd
242 ttyHSL
243 ttyHS
244 msm_pacman
245 subsys
246 voice_svc
247 bsg
248 ipaNatTable
249 ipa
250 battery_data
251 media
252 rtc
253 msm_thermal_query
254 msm_sps
Block devices:
1 ramdisk
259 blkext
7 loop
8 sd
65 sd
66 sd
67 sd
68 sd
69 sd
70 sd
71 sd
128 sd
129 sd
130 sd
131 sd
132 sd
133 sd
134 sd
135 sd
179 mmc
253 device-mapper
254 zram