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Date: Thu, 12 Dec 2013 10:08:38 +0100
From: Steffen Trumtrar <s.trumtrar@...gutronix.de>
To: delicious quinoa <delicious.quinoa@...il.com>
Cc: Linus Walleij <linus.walleij@...ricsson.com>,
linux-kernel <linux-kernel@...r.kernel.org>,
"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
Jamie Iles <jamie@...ieiles.com>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
Grant Likely <grant.likely@...retlab.ca>,
Rob Herring <rob.herring@...xeda.com>,
Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
Heiko Stuebner <heiko@...ech.de>, Alan Tull <atull@...era.com>,
Dinh Nguyen <dinguyen@...era.com>,
Yves Vandervennet <rocket.yvanderv@...il.com>
Subject: Re: [PATCH v9] gpio: add a driver for Synopsys DesignWare APB GPIO
Hi Alan!
On Wed, Dec 11, 2013 at 02:15:25PM -0600, delicious quinoa wrote:
> On Fri, Dec 6, 2013 at 3:09 PM, Alan Tull <delicious.quinoa@...il.com> wrote:
> > From: Alan Tull <atull@...era.com>
> >
> > Hi Linus,
> >
> > If you don't have any further comments, can you take this patch?
> >
> > Alan
>
> Basically, this is a driver that Jamie wrote and was upstreaming a few
> years ago. For some reason it never quite made it into the kernel. I
> picked it up, updated the interrupt support, posted it to the list and
> went through some reviews with it.
>
> This driver has been reviewed, I hope it can make it into the kernel.
>
> Alan
>
Sorry for chiming in late. I tested your driver on the Sockit and the GPIOs
work fine (basically just tested the 4 HPS LEDS that are on this board).
With the interrupt support I had a little trouble though:
The Sockit has an ADXL345 on the i2c bus with a gpio as interrupt line.
First: When you use "interrupt-parent", you have to specify the gpio node,
rather than the gpio-bank that has the interrupt-controller property. Is
that expected? I'm not really sure if that is normal behavior...
Second: The interrupt is registered as "GIC 37", which is a real interrupt on
the Socfpga. I would expect it to be marked as "GPIO 2xx" (or something in that
range). The interrupt from the gpiochip itself isn't registered at all ?!
Third: The interrupt didn't work. But that might also be my failure. I guess/hope
you tested interrupts successfully?!
(Fourth: small typo in the documentation example: "snps,nr-gpio" instead of "snps,nr-gpios")
Regards,
Steffen
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