On Thu, Jun 26, 2014 at 01:24:32PM +0200, Tomasz Figa wrote:

Current Samsung UART driver relies on probe order of particular
samsung-uart instances, which makes it impossible to get proper
initialization of ports when not all ports are available on board,
not even saying of deterministic device naming.

This series intends to fix this situation by adding support to parse
aliases from device tree and use them to assign instance IDs to
particular port instances.

How about instead exporting the path/id information so that userspace
can create /dev/serial/by-{path,id}/... for internal devices instead?

The problem you're raising is very much the same problem you have when
there are multiple USB serial devices connected to the machine - you
just get a bunch of /dev/ttyUSB* devices which are unordered (they can
change on each boot, or change order if you disconnect and reconnect
them.)

/dev/serial/by-{path,id}/ allows for a much more stable path.

-- 
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