linux-kernel - Re: [PATCH v2 2/5] ARM: zynq: dt: Convert to preprocessor includes

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Message-ID: <20140407180228.GN12170@pengutronix.de>
Date:	Mon, 7 Apr 2014 20:02:28 +0200
From:	Steffen Trumtrar <s.trumtrar@...gutronix.de>
To:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Cc:	Michal Simek <monstr@...str.eu>,
	Mike Looijmans <mike.looijmans@...ic.nl>,
	Mark Rutland <mark.rutland@....com>,
	devicetree@...r.kernel.org, Russell King <linux@....linux.org.uk>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Michal Simek <michal.simek@...inx.com>,
	linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	Kumar Gala <galak@...eaurora.org>,
	Soren Brinkmann <soren.brinkmann@...inx.com>
Subject: Re: [PATCH v2 2/5] ARM: zynq: dt: Convert to preprocessor includes

Hi!

On Mon, Apr 07, 2014 at 11:10:12AM -0600, Jason Gunthorpe wrote:
> On Mon, Apr 07, 2014 at 02:24:07PM +0200, Michal Simek wrote:
> 
> > Device-tree BSP and in 2014.01 there will be new BSP which just
> > generate them directly from the Vivado tools which just target your
> > reference design.  You can connect your custom IP (or Xilinx or 3rd
> > party) directly to the GIC which using different IRQ sensitivity
> > with whatever register addresses and make no sense to write it by
> > hand.
> 
> On our Zynq design here we ended up being unwilling to use platform
> generation from Vivado. Basically all our IP was custom, so there was
> no win at all to invoking the complexity of the automatic tools.
> 
> Thus we write the DT by hand, and our DT is complex, integrating
> peripherals that span two FPGAs.
> 
> I think the in-kernel DT should use the kernel conventions, which
> means using #include and the binding constants over magic values.
> 

ACK.

If in doubt follow common mainline practice. Although using includes
for DT is not necessarily common practice, readability of DTs is
really important IMHO.

Regards,
Steffen

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