* Stephen Warren wrote:

On 05/07/2012 02:50 AM, Terje Bergström wrote:

quoted

Hi Thierry,

I have still lots of questions regarding how device trees work. I'm now
just trying to match the device tree structure with hardware - let me
know if that goes wrong.

There's a hierarchy in the hardware, which should be represented in the
device trees. All of the hardware are client modules for host1x - with
the exception of host1x obviously. CPU has two methods for accessing the
hardware: clients' register aperture and host1x channels. Both of these
operate via host1x hardware.

We should define host1x bus in the device tree, and move all nodes
except host1x under that bus.

I think the host1x node /is/ that bus.

I agree. It's really just a "simple-bus" kind of bus. Except that it'll need
another compatible value to make the host1x driver bind to it. But we should
be able to make it work without creating a completely new bus. I guess the
"ranges" property could specify 0x54000000 as the base address and child
nodes could use offsets relative to that. Maybe even that is overkill,
though.

Thierry