I totally take Greg's point that the firmware load should be via a
firmware request from the driver which then in turn triggers the
firmware helper in userspace. When I checked that last time (about a
year ago) this was too buggy and I stuck with the comedi firmware upload
which has been running for about 4 years without probs. Might be a good
time to use the firmware helper.
But in comedi it is so that the command "comedi_config" associates a
driver with a device. This works fine with hotplug. I plug in my usbdux,
this triggers a udev event and then a udev rule can decide which
/dev/comedi? is actaully taking care of the box. If you want to question
that mechanism then comedi itself has to be rewritten. And I'm sure that
nobody here in comedi-land would like to do that. It just works too good.
> Why cannot be the /proc interface be used.
Can you explain that a bit more.
Thanks!
/Bernd
Sujit Karataparambil wrote:
We need to call the rule in the kernel context as 'greg' was saying.
Seems to be the correct way to be the firmware upload via USB.
On 12/3/08, Kay Sievers <kay.sievers@xxxxxxxx> wrote:
On Wed, Dec 3, 2008 at 09:40, Bernd Porr <berndporr@xxxxxxx> wrote:
Yes it will as the startup scripts already know how to handle coldplug
firmware events.
To give the "magic" a name: you mean udev adm trigger? Or a nice script
which writes "add" to all "uvents"? This is exactly what doesn't work. There
are absolutely no udev events generated for comedi during boot. I've checked
that now thoroughly and I think there's something wrong. What could that be?
How does the "device" look like in sysfs, where you want to hook into
with the userspace setup?
Kay
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