linux-kernel - Re: [PATCH] rfkill: Regulator consumer driver for rfkill

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Date:	Wed, 06 Apr 2011 16:09:28 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Antonio Ospite <ospite@...denti.unina.it>
Cc:	linux-wireless@...r.kernel.org, openezx-devel@...ts.openezx.org,
	"John W . Linville" <linville@...driver.com>,
	Liam Girdwood <lrg@...mlogic.co.uk>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	linux-kernel@...r.kernel.org, Marek Vasut <marek.vasut@...il.com>,
	Guiming Zhuo <gmzhuo@...il.com>
Subject: Re: [PATCH] rfkill: Regulator consumer driver for rfkill

On Wed, 2011-04-06 at 16:06 +0200, Antonio Ospite wrote:

> > > +	if (regulator_is_enabled(vcc)) {
> > > +		dev_dbg(&pdev->dev, "Regulator already enabled\n");
> > > +		rfkill_data->reg_enabled = 1;
> > > +	}
> > > +	rfkill_init_sw_state(rf_kill, !rfkill_data->reg_enabled);
> > > +
> > > +	ret = rfkill_register(rf_kill);
> > 
> > We recently had a thread about how rfkill_init_sw_state() isn't quite
> > working the right way. Also, it is indented to be used for devices that
> > keep their state over resume. I think you should remove it here and rely
> > on rfkill to sync you after registration.
> > 
> > Cf. the long thread here:
> > http://thread.gmane.org/gmane.linux.acpi.devel/49577
> >
> 
> Ok, but I still need to replace that call with a rfkill_set_sw_state()
> to expose the initial status of the regulator to the rfkill system,
> right?

Well, you could, but if you don't do that then the rfkill subsystem will
simply call set_block() shortly after registration to put it into the
state that it thinks it should be in, which is usually more useful.

johannes

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