21 Nov
2007
21 Nov
'07
2:41 p.m.
On Wed, Nov 21, 2007 at 02:00:42PM +0100, Wolfgang Denk wrote:
How do you handle the fact that device trees do not cover the whole system, i.e. chips behind SPI and I2C busses?
The device tree is supposed to contain a complete hardware description, i. e. including devices attached to such busses.
Yes, it is supposed to, but reality is different. Ok, so we have to double-code everything until the world has achieved perfectionism.
[How do you handle this with an ARM machine ID? ;-) ]
Well, we don't have to. Linux has a driver model which handles all this once you know the machine. No need to duplicate everything. Redundancy is generally a bad thing.
Robert
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