linux-kernel - Re: [PATCH v4 09/11] ARM: tegra: add support for warm reset GPIO

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Date:	Wed, 11 Feb 2015 09:17:45 -0800
From:	Andrew Bresticker <abrestic@...omium.org>
To:	Tomeu Vizoso <tomeu.vizoso@...labora.com>
Cc:	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Simon Glass <sjg@...omium.org>,
	Dylan Reid <dgreid@...omium.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Alexandre Courbot <gnurou@...il.com>,
	Paul Walmsley <paul@...an.com>,
	Eduardo Valentin <edubezval@...il.com>,
	Mikko Perttunen <mperttunen@...dia.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 09/11] ARM: tegra: add support for warm reset GPIO

Hi Tomeu,

On Wed, Feb 11, 2015 at 7:06 AM, Tomeu Vizoso
<tomeu.vizoso@...labora.com> wrote:
> From: Andrew Bresticker <abrestic@...omium.org>
>
> Allow for a warm reset GPIO to be passed to the PMC driver via DT
> which will be used to reset the system instead of writing to PMC_CTRL.
> The GPIO will be asserted at reset time and, if this fails to reset
> the system, we'll fall back to using PMC_CTRL.
>
> Signed-off-by: Andrew Bresticker <abrestic@...omium.org>
> [tomeu.vizoso@...labora.com: Rebased]
> Signed-off-by: Tomeu Vizoso <tomeu.vizoso@...labora.com>

There's actually gpio-restart driver now, which I think is what you
want instead of this.  See drivers/power/reset/gpio-restart.c.
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