Date: Fri, 4 Oct 2013 23:10:56 -0600
From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, monstr@monstr.eu,
        Pavel Machek <pavel@denx.de>, Michal Simek <michal.simek@xilinx.com>,
        linux-kernel@vger.kernel.org, Alan Tull <atull@altera.com>,
        Dinh Nguyen <dinguyen@altera.com>,
        Philip Balister <philip@balister.org>,
        Alessandro Rubini <rubini@gnudd.com>,
        Steffen Trumtrar <s.trumtrar@pengutronix.de>,
        Jason Cooper <jason@lakedaemon.net>,
        Yves Vandervennet <rocket.yvanderv@gmail.com>,
        Kyle Teske <kyle.teske@ni.com>, Josh Cartwright <joshc@eso.teric.us>,
        Nicolas Pitre <nico@linaro.org>,
        Mark Langsdorf <mark.langsdorf@calxeda.com>,
        Felipe Balbi <balbi@ti.com>, linux-doc@vger.kernel.org,
        Mauro Carvalho Chehab <m.chehab@samsung.com>,
        David Brown <davidb@codeaurora.org>, Rob Landley <rob@landley.net>,
        "David S. Miller" <davem@davemloft.net>, Joe Perches <joe@perches.com>,
        Cesar Eduardo Barros <cesarb@cesarb.net>,
        Samuel Ortiz <sameo@linux.intel.com>,
        Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [RFC PATCH v2 0/1] FPGA subsystem core
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On Fri, Oct 04, 2013 at 09:00:28PM -0700, H. Peter Anvin wrote:

> Every FPGA toolchain I know of has a way to emit JAM/STAPL bytecode
> files... and a fair number of programming scenarios need them.

Yes, but now you are talking about JTAG.

JTAG is a very different problem than configuring over the
configuration bus, I don't think it makes much sense to try and
combine those two things into a single subsystem.

The majority use of JAM/STAPL output is for manufacturing
automation. In system, In field programming of SRAM FPGAs via JTAG is
uncommon.

Jason
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