Sharing resources between several drivers.

[Shawn Guo]

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