linux-kernel - Re: [RFC PATCH] regulator: introduce boot protection flag

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Message-ID: <20160617114235.GK26099@sirena.org.uk>
Date:	Fri, 17 Jun 2016 12:42:35 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Pingbo Wen <pingbo.wen@...aro.org>
Cc:	linux-kernel@...r.kernel.org, lgirdwood@...il.com,
	vincent.guittot@...aro.org, stephen.boyd@...aro.org
Subject: Re: [RFC PATCH] regulator: introduce boot protection flag

On Fri, Jun 17, 2016 at 11:34:25AM +0800, Pingbo Wen wrote:
> On Wednesday, June 15, 2016 09:32 PM, Mark Brown wrote:

> > Having the consumer driver know that it's "critical" seems wrong since
> > different systems may have different ideas about that, it's probably
> > better to hook this in with the device model so that when the device
> > finishes probing that kicks things off.

> That will imply the protection would be end when the specific device has
> probed, and consumers should take their place at the same time. But
> there have some other devices, which will set the consumer in a IRQ
> event, or after some other events, can't be covered.

I don't understand what this means, sorry.

> We can set the protection flag easily, but it's hard to tell whether a
> consumer is well initialized, the end of protection, since regulator
> consumer is not initialized within one call.

If the driver is not initializing itself during probe the driver is
doing something wrong and needs to be fixed anyway.

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