linux-kernel - Re: [PATCH v2 2/2] ux500: add ab8500-regulators machine specific data

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Message-ID: <20100714153643.GB1689@bnru01.bnr.st.com>
Date:	Wed, 14 Jul 2010 21:06:44 +0530
From:	Sundar R IYER <sundar.iyer@...ricsson.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	"lrg@...mlogic.co.uk" <lrg@...mlogic.co.uk>,
	"sameo@...ux.intel.com" <sameo@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	STEricsson_nomadik_linux <STEricsson_nomadik_linux@...t.st.com>,
	Linus WALLEIJ <linus.walleij@...ricsson.com>,
	Bengt JONSSON <bengt.g.jonsson@...ricsson.com>
Subject: Re: [PATCH v2 2/2] ux500: add ab8500-regulators machine specific
 data

> Which datasheet, and will the system design actually be varying them at
> runtime - if it will how will it do so?  This is the settings for the
> particular system and generally a lot of these rails will get fixed at
> design time for various reasons (for example, the analogue supplies will
> usually depend on the analogue system design).
I am referring to the AB8500 device data sheet; not sure if its
available open.  I have taken the minimal/maximum figures as what is
mentioned for each supplies.

> Again, is it really the case that this will happen in this system?
Yes, if you are referring to regulator enable/disable.

> Nothing is currently able to actually do that, and unless every consumer
> using a given supply is hooked into the regulator API things will go
> wrong when some of them start doing so.
As i said earlier, my intention is to hard code the machine constraints.
The actual control in terms of enable/disable, controlling supply
voltages will happen, as you say when consumers are hooked up.

Thanks,
Sundar
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