RK3399Pro烧录的Debian10 内核比较新，如下：
toybrick@debian10:~$ cat /proc/version
Linux version 4.4.189 (kfx@inno) (gcc version 6.3.1 20170404 (Linaro GCC 6.3-2017.05) ) #93 SMP Tue Nov 26 16:40:07 CST 2019
toybrick@debian10:~$ l***_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 10 (buster)
Release: 10
Codename: buster
toybrick@debian10:~$ file /bin/bash
/bin/bash: ELF 64-bit LSB pie executable, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, for GNU/Linux 3.7.0, BuildID[sha1]=b11533bde88bb45ef2891fbf3ad86c1869ed3a41, stripped
toybrick@debian10:~$
该内核很强大了，可以通过sysfs方式来操作GPIO了。
接口目录在"/sys/class/gpio"文件夹下；
官方的文档有GPIO Sysfs Interface for Userspace，
RK3399Pro烧录的Debian10 内核比较新，如下：
toybrick@debian10:~$ cat /proc/version
Linux version 4.4.189 (kfx@inno) (gcc version 6.3.1 20170404 (Linaro GCC 6.3-2017.05) ) #93 SMP Tue Nov 26 16:40:07 CST 2019
toybrick@debian10:~$ l***_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 10 (buster)
Release: 10
Codename: buster
toybrick@debian10:~$ file /bin/bash
/bin/bash: ELF 64-bit LSB pie executable, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, for GNU/Linux 3.7.0, BuildID[sha1]=b11533bde88bb45ef2891fbf3ad86c1869ed3a41, stripped
toybrick@debian10:~$
该内核很强大了，可以通过sysfs方式来操作GPIO了。
接口目录在"/sys/class/gpio"文件夹下；
官方的文档有GPIO Sysfs Interface for Userspace，
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