linux-kernel - RE: [PATCH] mfd: palmas: Add DVFS mux setting

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Date:	Tue, 30 Jul 2013 13:53:32 -0700
From:	Andrew Chew <AChew@...dia.com>
To:	Stephen Warren <swarren@...dotorg.org>,
	Laxman Dewangan <ldewangan@...dia.com>
CC:	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	"pawel.moll@....com" <pawel.moll@....com>,
	"mark.rutland@....com" <mark.rutland@....com>,
	"ian.campbell@...rix.com" <ian.campbell@...rix.com>,
	"rob@...dley.net" <rob@...dley.net>,
	"sameo@...ux.intel.com" <sameo@...ux.intel.com>,
	"lee.jones@...aro.org" <lee.jones@...aro.org>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	"ian@...mlogic.co.uk" <ian@...mlogic.co.uk>,
	"j-keerthy@...com" <j-keerthy@...com>,
	"gg@...mlogic.co.uk" <gg@...mlogic.co.uk>,
	Rhyland Klein <rklein@...dia.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] mfd: palmas: Add DVFS mux setting

> On 07/27/2013 03:55 AM, Laxman Dewangan wrote:
> > On Saturday 27 July 2013 03:42 AM, Andrew Chew wrote:
> >> I wrote:
> >>> Andrew wrote:
> >>>> [adding a third pinmux configuration property to Palmas's DT]
> >>>
> >>> How does this interact with the pinctrl driver that Laxman just sent
> >>> for Palmas?
> >>>
> >>> https://lkml.org/lkml/2013/7/26/141
> >>> [PATCH 0/2] pinctrl: palmas: add pincontrol driver
> ..
> >> Abandoning this patch.
> ...
> > once we will have the pincontrol driver then mux pads are become
> redundant.
> 
> OK. The driver should probably operate like this then:
> 
> * During probe(), parse the ti,mux-pad* parameters, if present, and apply
> them. This is needed to maintain compatibility with old DTs that may contain
> these properties.
> 
> * At the end of probe(), register the pinctrl driver. If standard pinctrl
> properties are present in DT, these will then be applied. These may override
> the values set by any ti,mux-pad* properties if they were present.
> 
> Also, we should remove, or mark deprecated, the ti,mux-pad* properties in
> the binding document when adding pinctrl support.

Sounds reasonable to me.  The fate of my patch hasn't really been discussed, though.
Can we apply it, to make the ti,mux-pad* stuff complete?
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