Hi,
I think with 2.6.18 or so onwards, there are two entries under /sys/bus/<bus_type>/
drivers_autoprobe, drivers_probe. (Here bus_type is platform, usb, pci, etc...)
By default drivers_autoprobe is 1. You need to disable autprobing of the driver by writing a 0 to that entry.
Once you do that you need to write the name of the device that you want the driver to bind to in the drivers_probe entry.
Hope this is useful.
Thanks,
-Romit
>-----Original Message-----
>From: linux-embedded-owner@xxxxxxxxxxxxxxx [mailto:linux-embedded-
>owner@xxxxxxxxxxxxxxx] On Behalf Of Uwe Kleine-König
>Sent: Monday, July 21, 2008 12:12 PM
>To: linux-embedded@xxxxxxxxxxxxxxx
>Subject: RFC: prevent auto binding for some platform devices
>
>Hello,
>
>I have an emedded machine here on my desk and want to stop some
>driver/device pairs from binding. There are two types of reason for it:
>
> a) pin muxing doesn't allow attaching e.g. spi and serial at the same
> time. In this case I want a defined "winner" that doesn't depend
> on link (or module load) order.
>
> b) the devboard has attached an led on a line that is also available
> on a header. So I don't want to bind the led driver by default
> because there might be another device connected to the gpio line.
> Still I want to provide the led device and driver such that
> userspace can bind these two via sysfs and use it.
>
>I think a patch would be easy:
>
> - add a flag to struct device(?) settable by platform code that would
> indicate that the device should not autoprobe.
>
> - change bus_attach_device to check that flag and only call
> device_attach if it's not set.
>
>Would this be sensible? Would it help anyone else?
>
>Best regards
>Uwe
>
>--
>Uwe Kleine-König, Software Engineer
>Digi International GmbH Branch Breisach, Küferstrasse 8, 79206 Breisach, Germany
>Tax: 315/5781/0242 / VAT: DE153662976 / Reg. Amtsgericht Dortmund HRB 13962
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