From: Santosh Shilimkar <santosh.shilimkar@ti.com>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>,
Suman Anna <s-anna@ti.com>,
Jaswinder Singh <jaswinder.singh@linaro.org>,
Alexander Shiyan <shc_work@mail.ru>,
Alexandre Courbot <gnurou@gmail.com>,
"linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
<ivan.khoronzhuk@ti.com>,
Muralidharan Karicheri <m-karicheri2@ti.com>,
Rob Herring <robh+dt@kernel.org>,
Kumar Gala <galak@codeaurora.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v1] gpio: keystone: add dsp gpio controller driver
Date: Thu, 24 Jul 2014 10:21:27 -0400 [thread overview]
Message-ID: <53D11667.8050807@ti.com> (raw)
In-Reply-To: <CACRpkdYdUKmR+bZo374AqepDXfsZqBwJ88e4is90-UoUBWdJrA@mail.gmail.com>
On Thursday 24 July 2014 10:12 AM, Linus Walleij wrote:
> On Wed, Jul 23, 2014 at 5:25 PM, Santosh Shilimkar
> <santosh.shilimkar@ti.com> wrote:
>
>> I will try to answer this. This IP is indeed a GPIO block
>> but the IO's are used just OUTPUT lines from Linux
>> HOST perspective. These IOs are connected to the DSPs
>> as input/IRQ lines.
>
> So the DSP is another discrete IC, and could be something
> different, so this is board-level information?
>
> I'm really worrying whether this is general purpose or not :-/
>
Am not sure I follow you. This IP is completely controlled
by Linux OS to generate output signals. How does it matter
whether its connected to a peripheral or a discrete IC. For
example instead of DSP if I connected these lines to an
external PMIC, which considers these as input lines to
perform some actions. Isn't that GPIO usecase as per you ?
Given that this IP only output functionality is used but
that shouldn't matter. We have seen SOCs where GPIOs
are just used as input to form a Matrix Keyboard.
May be I am missing your point.
Regards,
Santosh
next prev parent reply other threads:[~2014-07-24 14:21 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-16 10:43 [PATCH v1] gpio: keystone: add dsp gpio controller driver Grygorii Strashko
2014-07-16 10:05 ` Varka Bhadram
2014-07-21 14:20 ` Grygorii Strashko
2014-07-23 15:10 ` Linus Walleij
2014-07-23 15:25 ` Santosh Shilimkar
2014-07-24 14:12 ` Linus Walleij
2014-07-24 14:21 ` Santosh Shilimkar [this message]
2014-07-24 15:23 ` Linus Walleij
2014-07-24 15:40 ` Santosh Shilimkar
2014-07-24 17:19 ` Jassi Brar
2014-07-24 17:22 ` Santosh Shilimkar
2014-07-24 18:12 ` Jassi Brar
2014-07-24 18:52 ` Suman Anna
2014-07-24 23:41 ` Santosh Shilimkar
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