linux-kernel - Re: [PATCH v8 2/4] fpga manager: add sysfs interface document

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Message-ID: <20150115215259.GA31850@amd>
Date:	Thu, 15 Jan 2015 22:52:59 +0100
From:	Pavel Machek <pavel@...x.de>
To:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>
Cc:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	atull <atull@...nsource.altera.com>,
	Pantelis Antoniou <pantelis.antoniou@...sulko.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, hpa@...or.com,
	Michal Simek <monstr@...str.eu>,
	Michal Simek <michal.simek@...inx.com>, rdunlap@...radead.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	devicetree@...r.kernel.org, robh+dt@...nel.org,
	Grant Likely <grant.likely@...aro.org>, iws@...o.caltech.edu,
	linux-doc@...r.kernel.org, Mark Brown <broonie@...nel.org>,
	philip@...ister.org, rubini@...dd.com,
	Steffen Trumtrar <s.trumtrar@...gutronix.de>,
	jason@...edaemon.net, kyle.teske@...com, nico@...aro.org,
	Felipe Balbi <balbi@...com>, m.chehab@...sung.com,
	davidb@...eaurora.org, Rob Landley <rob@...dley.net>,
	davem@...emloft.net, cesarb@...arb.net, sameo@...ux.intel.com,
	akpm@...ux-foundation.org,
	Linus Walleij <linus.walleij@...aro.org>, pawel.moll@....com,
	mark.rutland@....com, ijc+devicetree@...lion.org.uk,
	galak@...eaurora.org, devel@...verdev.osuosl.org,
	Alan Tull <delicious.quinoa@...il.com>,
	dinguyen@...nsource.altera.com, yvanderv@...nsource.altera.com
Subject: Re: [PATCH v8 2/4] fpga manager: add sysfs interface document

On Tue 2015-01-13 16:21:33, One Thousand Gnomes wrote:
> On Mon, 12 Jan 2015 11:06:08 -0700
> Jason Gunthorpe <jgunthorpe@...idianresearch.com> wrote:
> 
> > On Sun, Jan 11, 2015 at 10:29:00AM -0600, atull wrote:
> > > the FPGA image.  If someone wants there to be only one FPGA image on
> > > the FGPA forever, they will probably not be using this framework; their
> > > FPGA will probably be loaded before Linux boots up.
> > 
> > Nonsense, loading the FPGA through Linux is much better
> 
> You need both. There are platforms where the FPGA must be loaded to even
> boot the OS (for example Linux running an FPGA soft 486 can't run until
> the FPGA has the CPU loaded into it.

Well, but then the thing that programs FPGA is not Linux, so this is
little off-topic here. [But yes, there are systems where you want to
program FPGA from bootloader, because it is easier that way, or maybe
because it provides your video card.]

									Pavel

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