From: Eric Miao <eric.y.miao@gmail.com>
To: Marc Zyngier <maz@misterjones.org>
Cc: Daniel Mack <daniel@caiaq.de>,
Jebediah Huang <jebediah.huang@gmail.com>,
linux-arm-kernel@lists.infradead.org,
linux-input@vger.kernel.org
Subject: Re: Using PXA arm board with MAX7319 GPIO expander input
Date: Tue, 9 Feb 2010 09:05:22 +0800 [thread overview]
Message-ID: <f17812d71002081705q7723c388re8582d1186802340@mail.gmail.com> (raw)
In-Reply-To: <6a1db73cb6c89001764393acd766f2ba.squirrel@www.loen.fr>
On Mon, Feb 8, 2010 at 8:32 PM, Marc Zyngier <maz@misterjones.org> wrote:
>> I just saw that there is indeed no support for irq line handling in this
>> driver. In order to use these lines as input for something like the
>> gpio_keys driver, support for that should be added. I never used this
>> driver and can't say whether it is under active development.
>
> It should be rather easy to introduce something similar to what I did for
> the pca953x driver (http://patchwork.kernel.org/patch/77418/)
>
> MAX732x seems a lot saner than PCA953x, as it has at least a hardware
> interrupt mask...
Well, I'd say max732x is a chip of heavy simplification, input/output direction
of each pin is normally hardcoded, depending on the chip model used, there
seems no such interrupt mask registers for SW use really.
>
> M.
> --
> And if you don't know where you're going, any road will take you there...
>
>
>
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next prev parent reply other threads:[~2010-02-09 1:05 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-08 5:44 Using PXA arm board with MAX7319 GPIO expander input Jebediah Huang
2010-02-08 6:02 ` Eric Miao
2010-02-08 7:02 ` Jebediah Huang
2010-02-08 7:36 ` Daniel Mack
2010-02-08 7:56 ` Jebediah Huang
2010-02-08 11:08 ` Jebediah Huang
2010-02-08 11:33 ` Daniel Mack
2010-02-08 12:32 ` Marc Zyngier
2010-02-08 13:04 ` Daniel Mack
2010-02-09 1:05 ` Eric Miao [this message]
2010-02-09 7:39 ` Marc Zyngier
2010-02-09 8:19 ` Eric Miao
2010-02-09 10:22 ` Marc Zyngier
2010-02-09 1:07 ` Eric Miao
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