linux-kernel - Re: [PATCH v4 01/10] arm/tegra: initial device tree for tegra30

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Message-ID: <20111114152518.GJ19069@tbergstrom-lnx.Nvidia.com>
Date:	Mon, 14 Nov 2011 17:25:18 +0200
From:	Peter De Schrijver <pdeschrijver@...dia.com>
To:	Rob Herring <robherring2@...il.com>
CC:	Stephen Warren <swarren@...dia.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	Colin Cross <ccross@...roid.com>,
	"Olof Johansson" <olof@...om.net>,
	Russell King <linux@....linux.org.uk>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v4 01/10] arm/tegra: initial device tree for tegra30

On Sat, Nov 12, 2011 at 04:26:30AM +0100, Rob Herring wrote:
> On 11/11/2011 05:22 AM, Peter De Schrijver wrote:
> > This patch adds the initial device tree for tegra30
> > 
> > Signed-off-by: Peter De Schrijver <pdeschrijver@...dia.com>
> > ---
> >  arch/arm/boot/dts/tegra30.dtsi |  127 ++++++++++++++++++++++++++++++++++++++++
> >  1 files changed, 127 insertions(+), 0 deletions(-)
> >  create mode 100644 arch/arm/boot/dts/tegra30.dtsi
> > 
> > diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi
> > new file mode 100644
> > index 0000000..fabe243
> > --- /dev/null
> > +++ b/arch/arm/boot/dts/tegra30.dtsi
> > @@ -0,0 +1,127 @@
> > +/include/ "skeleton.dtsi"
> > +
> > +/ {
> > +	compatible = "nvidia,tegra30";
> 
> Needs documentation.
> 
> > +	interrupt-parent = <&intc>;
> > +
> > +	intc: interrupt-controller@...41000 {
> > +		compatible = "nvidia,tegra30-gic", "nvidia,tegra20-gic";
> > +		interrupt-controller;
> > +		#interrupt-cells = <1>;
> 
> Is the Tegra GIC really different from a standard A9 gic? You need to
> update to use the gic binding. The cells should be 3 for example.

It has an extra 'legacy' interrupt controller like tegra20 has. This is used
when waking up the CPU from power off mode.

Cheers,

Peter.
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