linux-kernel - Re: [RFC PATCH v3] reset: Add a defer reset object to send board specific reset

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Message-ID: <20140708080535.GJ13423@lukather>
Date:	Tue, 8 Jul 2014 10:05:35 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Philipp Zabel <p.zabel@...gutronix.de>,
	Linus Walleij <linus.walleij@...aro.org>
Cc:	Houcheng Lin <houcheng@...il.com>,
	Alexandre Courbot <gnurou@...il.com>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Stephen Gallimore <stephen.gallimore@...com>,
	Srinivas KANDAGATLA <srinivas.kandagatla@...com>,
	Ulf Hansson <ulf.hansson@...aro.org>, sre@...nel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	Vikas Sajjan <vikas.sajjan@...sung.com>,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC PATCH v3] reset: Add a defer reset object to send board
 specific reset

On Tue, Jul 08, 2014 at 09:52:03AM +0200, Linus Walleij wrote:
> On Wed, Jun 18, 2014 at 3:37 PM, Houcheng Lin <houcheng@...il.com> wrote:
> 
> > The Problem
> > -----------
> > The reset signal on a hardware board is send either:
> >     - during machine initialization
> >     - during bus master's initialization
> 
> I just thought about this a bit, since there isn't already a generic GPIO
> reset driver, just call this drivers/reset/reset-gpio.c and make the
> ability to deferral just a configuration detail of the GPIO reset driver.

Philipp has been working on one for quite some time. See
http://www.spinics.net/lists/arm-kernel/msg321927.html

However, it seems to progress slowly, and we don't seem to be able to
reach a consensus here.

If you ask me, having to set a few extra properties like this just
advocates for a regular reset driver and DT node for the reset GPIO,
but I'm pretty sure Philipp will feel otherwise :)

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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