linux-kernel - Re: [PATCH V3] regulator: disable supply regulator if it is enabled for boot-on

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Date:	Fri, 7 Sep 2012 09:59:01 +0800
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Laxman Dewangan <ldewangan@...dia.com>
Cc:	lrg@...com, rabin.vincent@...il.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3] regulator: disable supply regulator if it is enabled
 for boot-on

On Mon, Sep 03, 2012 at 07:55:39PM +0530, Laxman Dewangan wrote:

> +	/* If supply enabled during registrtaion then need to disable
> +	 * when full constraint enabled.
> +	 */
> +	unsigned int need_supply_disable:1;

I don't understand why we need this flag.  Shouldn't we just be making
the reference counts for the supplies correct and then have the
regulator disabled in the late initcall as a result of its refcount
falling to zero when the children are disabled?  I think what we need to
do here is always take a reference to the supply if the child is enabled
during boot, then in the initcall we can just disable the parent
regulator as normal.
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