Re: RFC: Platform data for onboard USB assets

From: Benjamin Herrenschmidt
Date: Fri Mar 18 2011 - 18:38:20 EST

On Thu, 2011-03-17 at 23:22 +0000, Andy Green wrote:
> Is there actually a need for sort of not platform_data but universal
> vid_pid_specific_usb_device_option_data coming from the board
> definition
> file or bootloader for *pluggable* usb devices? udev seems to be
> well
> established doing that already in a generic, not-platform-specific
> way
> that can go in all distros and so on nicely. Maybe this is just my
> impoverished imagination and people do want, say, some kinds of USB
> mice
> to operate at higher DPI or whatever when plugged in a specific board
> because it is that board.

Except that vid/pid are the -WRONG- way to do that. Your device is
on-board, the proper way to identify it uniquely is it's topological
location, ie path of HW port numbers.


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