From: shawn.guo@linaro.org (Shawn Guo)
To: linux-arm-kernel@lists.infradead.org
Subject: Sharing resources between several drivers.
Date: Sat, 28 Jul 2012 22:07:54 +0800 [thread overview]
Message-ID: <20120728140751.GI2128@S2101-09.ap.freescale.net> (raw)
In-Reply-To: <B5906170F1614E41A8A28DE3B8D121433EB1F69E@DBDE01.ent.ti.com>
On Fri, Jul 27, 2012 at 09:03:33AM +0000, Bedia, Vaibhav wrote:
> On Fri, Jul 27, 2012 at 13:29:21, javier Martin wrote:
> > Hi,
> > we are trying to support pinctrl for i.MX21, i.MX1 and i.MX27.
> >
> > In these chips, gpio and pinctrl use the same HW memory area
> > registers. This means that we have to request the same memory area
> > from two different drivers (gpio and pinctrl) but we don't know how to
> > do that.
> >
> > A similar example available is mxs, but it only works with device
> > tree, so this problem is avoided. However, some of these chips
>
> I am curious as to how device tree solves the access issues for
> a shared resource.
>
Although pinctrl and gpio share the same IO region, they are accessing
different registers, so there should be no access issues.
--
Regards,
Shawn
next prev parent reply other threads:[~2012-07-28 14:07 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-27 7:59 Sharing resources between several drivers javier Martin
2012-07-27 9:03 ` Bedia, Vaibhav
2012-07-28 14:07 ` Shawn Guo [this message]
2012-07-30 12:00 ` Bedia, Vaibhav
2012-07-27 9:19 ` Thomas Petazzoni
2012-07-27 9:33 ` javier Martin
2012-07-29 14:19 ` Arnd Bergmann
2012-08-04 23:46 ` Linus Walleij
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