[RFC/PATCH 2/7] OMAP3: beagle: don't touch omap_device internals

[nm@ti.com (Nishanth Menon)]

On 08:31-20110728, Menon, Nishanth wrote:
> On Thu, Jul 28, 2011 at 07:57, Cousson, Benoit <b-cousson@ti.com> wrote:
> [...]
> >> diff --git a/arch/arm/mach-omap2/omap_hwmod.c
> >> b/arch/arm/mach-omap2/omap_hwmod.c
> >> index 293fa6c..77d01a2 100644
> >> --- a/arch/arm/mach-omap2/omap_hwmod.c
> >> +++ b/arch/arm/mach-omap2/omap_hwmod.c
> >> @@ -142,6 +142,7 @@
> >> ?#include "powerdomain.h"
> >> ?#include<plat/clock.h>
> >> ?#include<plat/omap_hwmod.h>
> >> +#include<plat/omap_device.h>
> >
> > I'd rather put that code inside the omap_device.c instead of here.
> > The omap_device layer is on top of the omap_hwmod.
> > In order to minimize the dependencies from the low HW description layer to
> > the omap_device layer, you should maybe define a omap_device_from_hwmod()
> > function or something similar.
> Thanks for the review. will check on this.
> 
> >
> > That being said, do we really need to get the device from the hwmod name?
> > Cannot we use the device name instead?
> > I do not know all the usecases, that why I'm asking.
> mpu.0 , are the device names - which probably lets me walk the kernel
> data structrues instead of omap database to get to the right device,
> Vs using the common names like "mpu" " make things a little easier to
> deal with from driver perspective.
> 
> as an example, some of the dev_driver_string(dev):dev_name(dev) (in
> bracket hwmod name) I collected from OMAP4 are:
> platform:mpu.0 ("mpu")
> platform:l3_main_1.0 ('l3_main_1")
> pvrsrvkm:pvrsrvkm.0 ("gpu")
> rpres:fdif.0 ("fdif")
> omap_hsi:omap_hsi.0 ("hsi")
> platform:iss.0 ("iss")
> etc..
> 
> I mean I have'nt been keeping track of the device tree discussions so
> dont know if this function could be better done - but I think I agree
> with the overall idea that instead of spawning off get_xyz_device() we
> need to have some uniform approach to get to the device scaling
> silicon - I hoped we could consider the hwmod database/what ever
> replacing it to do that.
following are a couple of reference patches how this could be done
with omap_device