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Add a generic how to to the hardware feature documentation

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Sébastien Lucas 2016-06-20 17:06:55 +02:00
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documentation/Enabling_hardware_features.md
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@ -5,6 +5,24 @@ Some boards require some manual configuration to turn on/off certain features
In some cases, the procedure is "less than obvious", so we document some basic examples here.
# Generic howto for Allwinner devices
## Legacy or Vanilla kernel ?
Many Armbian images come in two flavours : Legacy (using an older kernel version) and Vanilla (up-to-date kernel). Depending on kernel version, the procedure to enable/disable features is not the same :
* Legacy kernel : FEX
* Vanilla kernel : DT (Device Tree)
## What flavour am I using ?
Best way to know is by checking your kernel version :
```
root@bananapipro:~# uname -a
Linux bananapipro 4.5.2-sunxi #11 SMP Thu Apr 28 21:53:25 CEST 2016 armv7l GNU/Linux
```
In this example the kernel version is 4.5.2 so you can use DT to tweak some settings. If you get a kernel version 3.X then you'll be certainly using FEX.
# H3 based Orange Pi, legacy kernel