udev and the device tree?

[Jimmy Johnson]

Can anyone comment on how these 2 schemes fit together for embedded Linux devices? Should we still use the udev calls to populate known devices to /dev or is there a better way now that we have the device tree available?

Any links on the subject are welcome as well.

Thanks.

[Måns Rullgård]

Jimmy Johnson <eclecti...@gmail.com> writes:

> Can anyone comment on how these 2 schemes fit together for embedded
> Linux devices? Should we still use the udev calls to populate known
> devices to /dev or is there a better way now that we have the device
> tree available?

DT is a method for the bootloader to pass information about the hardware
to the kernel. Udev performs userspace actions based on kernel-provided
information about hardware (and other things). The two are (almost)
entirely unrelated since the kernel reports the same events to udev
regardless of the form in which it received the information.

--
M�ns Rullg�rd
ma...@mansr.com

[Jimmy Johnson]

On Thursday, May 29, 2014 2:01:55 PM UTC-7, Måns Rullgård wrote:

Thanks for straighting me out, it has been awhile since I have looked at drivers (a long while) I wasn't completely clear how udev worked. But now I see how they work together.