linux-kernel - Re: [PATCH v4] extcon: Palmas Extcon Driver

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Message-ID: <519285B6.2090701@nvidia.com>
Date:	Wed, 15 May 2013 00:13:02 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Graeme Gregory <gg@...mlogic.co.uk>
CC:	Kishon Vijay Abraham I <kishon@...com>,
	Mark Brown <broonie@...nel.org>,
	"myungjoo.ham@...sung.com" <myungjoo.ham@...sung.com>,
	"cw00.choi@...sung.com" <cw00.choi@...sung.com>,
	"balbi@...com" <balbi@...com>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	"rob@...dley.net" <rob@...dley.net>,
	"ruchika@...com" <ruchika@...com>,
	"tony@...mide.com" <tony@...mide.com>,
	"sameo@...ux.intel.com" <sameo@...ux.intel.com>
Subject: Re: [PATCH v4] extcon: Palmas Extcon Driver

On Tuesday 14 May 2013 03:24 PM, Graeme Gregory wrote:
> On Tue, May 14, 2013 at 02:48:53PM +0530, Kishon Vijay Abraham I wrote:
>> On Tuesday 07 May 2013 04:15 PM, Mark Brown wrote:
>>> On Tue, May 07, 2013 at 03:17:08PM +0530, Kishon Vijay Abraham I wrote:
>>>> On Tuesday 07 May 2013 01:28 PM, Mark Brown wrote:
>>>>>> The platform can provide it's own vbus control in which case this is
>>>>>> not needed.
>>>>> So why is there no interaction with this external VBUS control and how
>>>>> does the driver distinguish between that and an error getting the
>>>>> regulator?
>>>> The platform specifies if it provides its own VBUS control by the dt
>>>> property ti,no_control_vbus. So the driver will give an error only
>>>> when *ti,no_control_vbus* is not set. Graeme?
>>> That doesn't answer the question about why there's no interaction with
>>> the external control...
>>>
>> Graeme?
>>
> I already partially answered this, it was written for a SoC where VBUS
> generation was in hardware on the SoC with no information.
>
> I would say if nvidia/Laxman do not need this remove it, if someone ever
> uses it then they can re-add it easy enough!

I think we really do not require this. Just we need the notification 
through extcon about the cable connection. We should remove it for 
avoiding complexity for now.

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