linux-kernel - Re: PROBLEM: bindings for drivers/mfd/twl4030-power.c

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Message-ID: <20140903190234.GH11766@atomide.com>
Date:	Wed, 3 Sep 2014 12:02:34 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Nishanth Menon <nm@...com>
Cc:	"Dr. H. Nikolaus Schaller" <hns@...delico.com>,
	Lee Jones <lee.jones@...aro.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Marek Belisko <marek@...delico.com>, linux-omap@...r.kernel.org
Subject: Re: PROBLEM: bindings for drivers/mfd/twl4030-power.c

* Nishanth Menon <nm@...com> [140903 11:51]:
> On 09/03/2014 01:45 PM, Tony Lindgren wrote:
> > * Dr. H. Nikolaus Schaller <hns@...delico.com> [140901 09:54]:
> >> Hi,
> >>
> >> Am 25.08.2014 um 23:26 schrieb Tony Lindgren:
> >>
> >>> * Dr. H. Nikolaus Schaller <hns@...delico.com> [140817 08:46]:
> >>>> I am trying to make ti,use_poweroff work on 3.17-rc1 for the GTA04 board.
> >>>> Poweroff was broken for a while and I found that the driver isn't loaded at all.
> >>>>
> >>>> It appears to me that commit e7cd1d1eb16fcdf53001b926187a82f1f3e1a7e6
> >>>> did rename the compatible entry from "ti,twl4030-power" to "ti,twl4030-power-reset"
> >>>> but this was not documented in the bindings and of course our DT does not
> >>>> match.
> >>>>
> >>>> Even your commit message talks about "ti,twl4030-power" although I can't find it
> >>>> in the code.
> >>>
> >>> Hmm sorry did I accidentally remove ti,twl4030-power? If so, that should
> >>> be added back for sure. Do you have a patch for that already?
> >>
> >> No, I have only updated our device tree because I don't know if it really should
> >> be added back or not.
> >>
> >> As you say the "ti,twl4030-power" does not configure anything. So what
> >> is it good for?
> > 
> > Only for the poweroff if "ti,use_poweroff" is set. Care to do a patch
> > as you clearly have a use case to test it with?
> 
> Tony, we were talking about supporting ti,system-power-controller as
> the standard way of stating poweroff control is by the PMIC. this
> seems to be standard in various SoCs. use_poweroff seems to predate
> that standardization. Should'nt we start using
> ti,system-power-controller instead?

Sure we can add that. But need to keep also parsing "ti,use_poweroff"
as it's already in use.

Regards,

Tony
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