linux-kernel - Re: [PATCH v2 2/3] ARM: dts: socfpga: fpga bridges bindings docs

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Date:	Tue, 28 Oct 2014 16:53:47 -0500
From:	atull <atull@...nsource.altera.com>
To:	Steffen Trumtrar <s.trumtrar@...gutronix.de>
CC:	<jgunthorpe@...idianresearch.com>, <hpa@...or.com>,
	<monstr@...str.eu>, <michal.simek@...inx.com>,
	<rdunlap@...radead.org>, <gregkh@...uxfoundation.org>,
	<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<pantelis.antoniou@...sulko.com>, <robh+dt@...nel.org>,
	<grant.likely@...aro.org>, <iws@...o.caltech.edu>,
	<linux-doc@...r.kernel.org>, <pavel@...x.de>, <broonie@...nel.org>,
	<philip@...ister.org>, <rubini@...dd.com>, <jason@...edaemon.net>,
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	<delicious.quinoa@...il.com>, <dinguyen@...nsource.altera.com>,
	<yvanderv@...nsource.altera.com>
Subject: Re: [PATCH v2 2/3] ARM: dts: socfpga: fpga bridges bindings docs

On Tue, 28 Oct 2014, atull wrote:

> On Fri, 24 Oct 2014, Steffen Trumtrar wrote:

> > 
> > > + - init-val       : 0 if driver should disable bridge at startup
> > > +                    1 if driver should enable bridge at startup
> > > +                    driver leaves bridge in current state if property not
> > > +                    specified.
> > > +
> > 
> > Configuration in the DT? Really?

The FPGA can be programmed by several different methods (eeprom, jtag,
preloader, Linux).  The guiding principle is: whoever programmed the
FPGA should release the bridge.  At one point, we thought 'init-val'
would be needed, but I think it can be taken out and we won't miss it.

Alan
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