Re: Non-enumerable devices on USB and other enumerable buses

[Ming Lei]

On Tue, Aug 20, 2013 at 12:01 AM, Mark Brown <broonie@xxxxxxxxxx> wrote:
> On Mon, Aug 19, 2013 at 08:17:53PM +0800, Ming Lei wrote:
>> On Sat, Aug 17, 2013 at 9:29 AM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote:
>
>> > Aong those lines, I would like to point out that the device concept
>> > embodied in the kernel's data structures can be pretty thin.  For
>> > example, it might be little more than a port number or bus address.
>
>> Maybe the principle behind drivers/usb/core/usb-acpi.c is helpful
>> for the problem, and DT may refer to ACPI to describe on-board
>> USB devices, and the way to retrieve platform data too.
>
> I can't parse this at all well - why would DT want to refer to ACPI, do
> you mean people may wish to look at the code as an example?  As Grant

I mean usb-acpi provides one approach to retrieve platform data for USB device
during device enumeration, and the idea might be helpful for you to implement
similar things based on DT.

> noted DT already has some mechanisms for enumerable buses which looking
> at the code appears to be broadly what that's doing.

If the mechanism is ready now, so looks you might post code for review
and discussion?


Thanks,
-- 
Ming Lei
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/