gpio x*32+ y*8 + z
pmu
/kernel/drivers/mfd$ vi rk808.c
root@EMT100X:/sys/class/gpio/gpio238 # echo 0 > value
root@EMT100X:/sys/class/gpio/gpio238 #
C:\Users\James>adb shell
编译linux
http://wiki.t-firefly.com/zh_CN/Firefly-RK3288/linux_compile_gpt.html