linux-kernel - Re: [PATCH 1/6] regulator: core: Allow simultaneous use of enable op and GPIO

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20160623100104.GU28202@sirena.org.uk>
Date:	Thu, 23 Jun 2016 11:01:04 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Alexandre Courbot <gnurou@...il.com>
Cc:	Alexandre Courbot <acourbot@...dia.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH 1/6] regulator: core: Allow simultaneous use of enable op
 and GPIO

On Thu, Jun 23, 2016 at 02:29:39PM +0900, Alexandre Courbot wrote:

> There is also another potential problem with not using the enable GPIO
> in the regulator core: said GPIO can not be shared anymore between
> several regulators, as this was handled by the core.

Yeah, but there's more fun there since you'd need to sync up with the
device specific enable as well - it's not clear that such hardware would
make sense TBH.

> That's not a big issue for our use-case but I just wanted to point it
> out. Maybe we need a more global solution for shared GPIOs, but I can
> see a few challenges on the way (e.g. which policy to adopt and how to
> handle conflicts).

Indeed.  I've never seen such hardware though so...

Download attachment "signature.asc" of type "application/pgp-signature" (474 bytes)