MIME-Version: 1.0
In-Reply-To: <20140711062811.GC3003@tarshish>
References: <1403091577-10232-1-git-send-email-harinik@xilinx.com>
	<5cc8b89b-20ff-4fa9-92dd-bb2f6d3512d8@BY2FFO11FD030.protection.gbl>
	<CACRpkdb1M3-hrSKLKWz21LCJ1sMvsq5E-aqkpmVhy0NwOS5HhA@mail.gmail.com>
	<20140707152309.GH4939@tarshish>
	<CACRpkdY+3hy5iw=uRdmu665NWsoGacTMgjUq97219kEcfn7Dqw@mail.gmail.com>
	<20140711062811.GC3003@tarshish>
Date: Fri, 11 Jul 2014 14:06:29 +0200
Message-ID: <CACRpkdYi_xbixsgvF0NMVdRmxbAgDVOnq-vzYVpDkLHTL8-12A@mail.gmail.com>
Subject: Re: [PATCH v2 1/2] gpio: Add driver for Zynq GPIO controller
From: Linus Walleij <linus.walleij@linaro.org>
To: Baruch Siach <baruch@tkos.co.il>
Cc: =?UTF-8?Q?S=C3=B6ren_Brinkmann?= <soren.brinkmann@xilinx.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexandre Courbot <gnurou@gmail.com>,
        Harini Katakam <harinik@xilinx.com>, Pawel Moll <pawel.moll@arm.com>,
        "ijc+devicetree@hellion.org.uk" <ijc+devicetree@hellion.org.uk>,
        "linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
        Michal Simek <michal.simek@xilinx.com>,
        Harini Katakam <harinikatakamlinux@gmail.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
        "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
        Rob Herring <robh+dt@kernel.org>, Rob Landley <rob@landley.net>,
        Kumar Gala <galak@codeaurora.org>,
        Grant Likely <grant.likely@linaro.org>,
        Harini Katakam <harini.katakam@xilinx.com>,
        "linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>
Content-Type: text/plain; charset=UTF-8
Sender: linux-kernel-owner@vger.kernel.org

On Fri, Jul 11, 2014 at 8:28 AM, Baruch Siach <baruch@tkos.co.il> wrote:
> On Tue, Jul 08, 2014 at 11:27:57AM +0200, Linus Walleij wrote:

>> What is the usecase here?
>
> During boot I need to know, for example, when an FPGA is ready to be
> programmed, and when said FPGA has finished its initialization. I also read
> the sate of on-board DIP switches to determine the desired boot method. I find
> the current sysfs interface quite convenient for these and similar tasks.

So given that an FPGA is a piece of hardware, it should have its firmware
loaded from the kernel and a kernel driver communicating with it I guess?

I feel the smell of a huge bundle of userspace drivers for something that
should be handled by the kernel.

Yours,
Linus Walleij
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/