[yocto] Power off IC over Yocto

[Christian Ege]

Hi,
Am 15.12.2015 6:45 nachm. schrieb "simo" <sazzalin at settopsurvey.com>:
>
> I am using a Gumtix Overo board and we create and expansion board that
> power Overo and other devices by external power supply IC.
>
> Our expansion board with power supply are connected by I2C bus 2 in
> overo (not the same i2C that TW4030 or tps6595 is connected).
>
> Using the Linux  command shutdown we would like to power off the hole
> system.
> We would like to close the linux and last thing send a command over I2C
> to our power supply IC in order it disconnect the physical power.
>
> Our question is:
>
> Where we have to implement that function?
> Is there any example of it?
I guess you can use
http://lxr.free-electrons.com/source/kernel/reboot.c

You have to create some kernel module doing this or write a kernel patch.

Regards,
Christian
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