From: Arnd Bergmann <arnd@arndb.de>
To: Alexander Stein <alexander.stein@systec-electronic.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>,
linux-input@vger.kernel.org, devicetree@vger.kernel.org,
linux-gpio@vger.kernel.org,
Laxman Dewangan <ldewangan@nvidia.com>
Subject: Re: [PATCH v2 1/1] Input: gpio_keys - add device tree support for interrupt only keys
Date: Thu, 13 Nov 2014 12:00:16 +0100 [thread overview]
Message-ID: <1616597.6UJpl1xeSr@wuerfel> (raw)
In-Reply-To: <4899804.1F6dNN1eJX@ws-stein>
On Thursday 13 November 2014 11:52:48 Alexander Stein wrote:
> On Thursday 13 November 2014 11:47:13, Arnd Bergmann wrote:
> > Regarding your initial use case of testing interrupt polarity, would
> > you have been able to do the same thing by looking at the interrupt
> > count in /proc/interrupts?
>
> This is only possible if some driver actually requests this interrupt, no?
Yes, I think that is correct, at least with sparseirq, which is now the
default. For interrupts that are mapped by the irqchip, you can look
up the number of spurious interrupts in /proc/irq/<nr>/spurious.
Arnd
next prev parent reply other threads:[~2014-11-13 11:00 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-12 16:02 [PATCH v2 1/1] Input: gpio_keys - add device tree support for interrupt only keys Alexander Stein
2014-11-12 16:04 ` Arnd Bergmann
2014-11-12 16:38 ` Alexander Stein
2014-11-12 19:16 ` Arnd Bergmann
2014-11-13 10:35 ` Alexander Stein
2014-11-13 10:47 ` Arnd Bergmann
2014-11-13 10:52 ` Alexander Stein
2014-11-13 11:00 ` Arnd Bergmann [this message]
2014-11-13 11:02 ` Laxman Dewangan
2014-11-13 10:59 ` Laxman Dewangan
2014-11-13 11:05 ` Arnd Bergmann
2014-11-13 11:17 ` Laxman Dewangan
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