linux-kernel - Re: parent/child hierarchy for regulator

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Date:	Fri, 6 Mar 2015 10:40:45 +0800
From:	Peter Chen <peter.chen@...escale.com>
To:	Stefan Wahren <stefan.wahren@...e.com>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <broonie@...nel.org>,
	<lgirdwood@...il.com>
Subject: Re: parent/child hierarchy for regulator

On Thu, Mar 05, 2015 at 01:18:54PM +0100, Stefan Wahren wrote:
> Hi Peter,
> 
> Am 05.03.2015 um 11:35 schrieb Peter Chen:
> > Hi lists,
> >
> > Any good ways at code/dts to show parent/child hierarchy for regulator?
> >
> > The related regulators at my platforms like below:
> > PMIC (SWB 5v) --> Switch Chip (GPIO Regulator) --> USB VBUS
> >
> > PMIC has one 5V regulator (eg, swbst at pfuse), and it is the input
> > for USB power switch chip, and there are two gpios at this switch
> > chip to control if 5V is output or not, we register these two gpios as 
> > fixed regulators, currently, if regulator swbst is disabled, the
> > gpio regulator has no way to know, and cause the vbus voltage is wrong.
> >
> > Thanks in advance.
> >
> 
> i don't have an answer to your question, but do you think of i.MX28
> platform?
> 

No, many Freescale i.mx6 SDB boards need to consider this problem.
-- 

Best Regards,
Peter Chen
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