From: Baruch Siach <baruch@tkos.co.il>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: "Sören 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>
Subject: Re: [PATCH v2 1/2] gpio: Add driver for Zynq GPIO controller
Date: Mon, 7 Jul 2014 18:23:09 +0300 [thread overview]
Message-ID: <20140707152309.GH4939@tarshish> (raw)
In-Reply-To: <CACRpkdb1M3-hrSKLKWz21LCJ1sMvsq5E-aqkpmVhy0NwOS5HhA@mail.gmail.com>
Hi Linux,
On Mon, Jul 07, 2014 at 04:51:56PM +0200, Linus Walleij wrote:
> On Wed, Jun 18, 2014 at 5:36 PM, Sören Brinkmann <soren.brinkmann@xilinx.com> wrote:
> > The first is, how is userspace supposed to find the correct offset for a
> > GPIO pin.
>
> The sysfs interface to GPIO is *NOT* *GOOD* this is universally
> agreed upon.
>
> This needs someone to step in and provide a replacement, my preferred
> mechanism would be a /dev/gpiochip0/... hierarchy using char devices.
I really like the ability to control GPIOs from shell, both interactively and
scripted. I find it useful for quick hardware level debugging, and for boot
time scripting (mainly in initramfs). Do you intend to preserve this
capability in the future? Will I need a special utility (or Busybox applet) to
do this with char device ioctl?
baruch
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next prev parent reply other threads:[~2014-07-07 15:23 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-18 11:39 [PATCH v2 1/2] gpio: Add driver for Zynq GPIO controller Harini Katakam
2014-06-18 11:39 ` [PATCH v2 2/2] devicetree: Add Zynq GPIO devicetree bindings documentation Harini Katakam
2014-07-07 14:53 ` Linus Walleij
2014-07-07 17:35 ` Sören Brinkmann
[not found] ` <1403091577-10232-1-git-send-email-harinik-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
2014-06-18 15:36 ` [PATCH v2 1/2] gpio: Add driver for Zynq GPIO controller Sören Brinkmann
2014-07-07 14:51 ` Linus Walleij
2014-07-07 15:23 ` Baruch Siach [this message]
2014-07-08 9:27 ` Linus Walleij
2014-07-11 6:28 ` Baruch Siach
2014-07-11 12:06 ` Linus Walleij
2014-07-11 12:27 ` Baruch Siach
2014-07-11 12:38 ` Linus Walleij
2014-07-07 16:08 ` Sören Brinkmann
2014-07-08 9:34 ` Linus Walleij
2014-07-08 15:55 ` Sören Brinkmann
2014-07-10 8:57 ` Linus Walleij
2014-07-07 14:45 ` Linus Walleij
2014-07-07 17:33 ` Sören Brinkmann
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