Load environment variables earlier

[Sascha Hauer]

On Fri, Sep 15, 2017 at 10:33:53AM +0800, zjh wrote:
>  think the environment variables should be loaded before the device is registered,
>  so when the device is registered, it can be initialized according to the environment variable.

When devices are influenced by environment variables they must be
prepared that these variables are changed *after* registration. Note
that environment variables are loaded from storage media that are
devices themselves, so that's a catch 22.

Sascha

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |