linux-kernel - Re: [PATCH v2] extcon: otg_gpio: add driver for USB OTG port controlled by GPIO(s)

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Message-ID: <CACRpkdZyGmx8srMCyXKhQyik4us_2=Hv+mG+V4O+9LJ_fKMAcw@mail.gmail.com>
Date:	Sat, 7 Mar 2015 21:03:54 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	David Cohen <david.a.cohen@...ux.intel.com>
Cc:	Felipe Balbi <balbi@...com>,
	Robert Baldyga <r.baldyga@...sung.com>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	baolu.lu@...ux.intel.com
Subject: Re: [PATCH v2] extcon: otg_gpio: add driver for USB OTG port
 controlled by GPIO(s)

On Fri, Feb 20, 2015 at 9:40 PM, David Cohen
<david.a.cohen@...ux.intel.com> wrote:
> On Fri, Feb 20, 2015 at 02:00:26PM -0600, Felipe Balbi wrote:
>> On Fri, Feb 20, 2015 at 11:59:27AM -0800, David Cohen wrote:

>> > I'd need to lookup GPIOs via ACPI without requesting them on mfd driver
>> > and then give them to children devices.
>> > Heikki proposed a way to do that on [1], but it got nack'ed by community.
>>
>> you missed [1] :-)
>
> Oops. Looks like it went away during your past reply :)
>
> [1] https://lkml.org/lkml/2014/12/18/82

We don't want to do that in generic code since it's an ACPI
problem, not a generic GPIO problem.

So the solution must be confined to the GPIO ACPI portions
of the GPIO code, not altering central mechanisms.

Yours,
Linus Walleij
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