On 02/21/2013 04:11 PM, Jason Gunthorpe wrote:
On Thu, Feb 21, 2013 at 05:05:54PM -0500, Nicolas Pitre wrote:
...
The DT is meant to describe hardware. As far as I know, the hardware I own seems to be rather static and stable, and unlike software there is no way I can change it (soldering irons don't count).
.. and the patching I mention above are largely driven by either a change in understanding of how OF should describe the hardware, or a change in understanding of how the driver should treat the hardware.
The recent patching for the tegra PCI-E bridge is instructive in this regard, Theirry learned how to drive the chip in a way that creates a single PCI domain - this necessitates a change in how the DT models that hardware block.
While I certainly don't disagree with the sentiment of your email, Tegra PCIe is a bad example. There is no finalized DT binding yet for the Tegra PCIe HW. Thierry is in the process of defining it for the first time.