Re: CVS commit: src/sys/dev/i2c

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Tue, Aug 29, 2017 at 10:10:54AM +0000, Jared D. McNeill wrote:
> Module Name:	src
> Committed By:	jmcneill
> Date:		Tue Aug 29 10:10:54 UTC 2017
> 
> Modified Files:
> 	src/sys/dev/i2c: axp20x.c axp20xvar.h
> 
> Log Message:
> Add powerdown support and hook it in to FDT

I'd like to have a way to disable this (a compile-time option would be OK
for me).

On evaluation boards (like cubieboard, or olimex lime2), you may have
a power button on the board itself but you don't have a way to add an external
power button (e.g. if you put the board in a case), so once powered off
you have to power-cycle it.

For a personnal project (for those curious, available at
https://github.com/mbouyer/marine_chartplotter) I embeeded a olimex lime2
in a case, along with a power/interface board. I did develop a driver for
the external power controller, and in such a case I don't want the
power hook of the axp20x to be called. I don't think this use case is
uncommon ...

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
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