linux-kernel - Re: [PATCH] ARM: socfpga: dts: add fpga manager

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Message-ID: <20151013202027.GC17155@pengutronix.de>
Date:	Tue, 13 Oct 2015 22:20:27 +0200
From:	Steffen Trumtrar <s.trumtrar@...gutronix.de>
To:	Dinh Nguyen <dinguyen@...nsource.altera.com>
Cc:	atull@...nsource.altera.com, Mark Rutland <mark.rutland@....com>,
	devicetree@...r.kernel.org, Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
	Kumar Gala <galak@...eaurora.org>, delicious.quinoa@...il.com,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] ARM: socfpga: dts: add fpga manager

On Tue, Oct 13, 2015 at 02:18:22PM -0500, Dinh Nguyen wrote:
> On Tue, 13 Oct 2015, Steffen Trumtrar wrote:
> 
> > Hi Alan!
> > 
> > On Tue, Oct 13, 2015 at 01:28:20PM -0500, atull@...nsource.altera.com wrote:
> > > From: Alan Tull <atull@...nsource.altera.com>
> > > 
> > > Add FPGA manager to device tree for SoCFPGA.
> > > 
> > > Signed-off-by: Alan Tull <atull@...nsource.altera.com>
> > > ---
> > >  arch/arm/boot/dts/socfpga.dtsi | 7 +++++++
> > >  1 file changed, 7 insertions(+)
> > > 
> > > diff --git a/arch/arm/boot/dts/socfpga.dtsi b/arch/arm/boot/dts/socfpga.dtsi
> > > index 314e589..e37ba11 100644
> > > --- a/arch/arm/boot/dts/socfpga.dtsi
> > > +++ b/arch/arm/boot/dts/socfpga.dtsi
> > > @@ -834,5 +834,12 @@
> > >  			compatible = "altr,sys-mgr", "syscon";
> > >  			reg = <0xffd08000 0x4000>;
> > >  		};
> > > +
> > > +		hps_0_fpgamgr: fpgamgr@...f706000 {
> > > +			compatible = "altr,socfpga-fpga-mgr";
> > > +			reg = <0xFF706000 0x1000
> > > +			       0xFFB90000 0x1000>;
> > > +			interrupts = <0 175 4>;
> > > +		};
> > >  	};
> > >  };
> > 
> > Please keep the format in line with the rest of the file:
> > Hexvalues are lowercase and no 0x after the "fpgamgr@".
> > I'd say "And please put the node in its proper position
> > according to its address", but I see just now, that the
> > dtsi is all messed up right now anyway :-(
> > 
> 
> How so? Patches are welcomed!

Done :-)

> 
> Please fix the "fpgamgr@" and lower case the hex values. But I would prefer the
> nodes to be in alphabetical order.
> 

Ah, that explains it, I guess. I always sorted my patches by address :-)
The thing is, now all nodes are sorted alphabetically by phandle,
the clkmgr however seems to be ordered by address.

I prefer address btw because it is a fixed hardware constant. For the
dts files sorting via phandle is again fixed via the dtsi.

Regards,
Steffen

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