On Fri, Mar 16, 2012 at 8:43 PM, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> On Fri, Mar 16, 2012 at 12:02:35PM +0000, Stojsavljevic, Zoran wrote:
>> Hello,
>>
>> I would like to ask some questions about forward porting of the USB
>> Driver Controller (UDC) from 2.6.34.10 to 3.2.11 kernel.
>
> Which specific driver controller are you referring to? Why isn't it
> already in the main kernel.org tree? Any pointers to where the code is
> at?
>
>>
>> I see that there are some changes in the gadget framework, and this
>> is what I have noticed so far:
>>
>> [1] Functions usb_gadget_register_driver() and
>> usb_gadget_unregister_driver() are moved up to gadget
>> driver framework;
>> [2] usb_gadget_probe_driver() replaced
>> usb_gadget_register_driver();
>> [3] There also two new functions added in UDC framework:
>> xxxxx_start() and xxxx_stop(), example taken from
>> net2280.c:
>> static int net2280_start(struct usb_gadget *_gadget,
>> struct usb_gadget_driver *driver);
>> static int net2280_stop(struct usb_gadget *_gadget,
>> struct usb_gadget_driver *driver);
>>
>> static const struct usb_gadget_ops net2280_ops = {
>> .get_frame = net2280_get_frame,
>> .wakeup = net2280_wakeup,
>> .set_selfpowered = net2280_set_selfpowered,
>> .pullup = net2280_pullup,
>> .udc_start = net2280_start,
>> .udc_stop = net2280_stop,
>> }
>>
>> Does anybody have set of guidelines/can point set of guidelines how
>> to adapt to the new interfaces, if there is forward porting effort to be
>> made?
>>
>> Or maybe ad-hoc short description how to do forward porting?
>
> Sort version:
> 1) increment kernel version
> 2) apply patch
> 3) fix up problems
> 4) go to step 1
>
Or something similar, but in one go ?...
Track what changed in some other reference(well maintained and
similar) UDC driver
(say) $ git log v2.6.34.10..v3.2.11 drivers/usb/gadget/net2280.* > todo-list
>From the todo-list, apply only changes that are common across UDCs(came via
to arch changes) by weeding out any UDC specific fix/feature.
Cheers,
-jassi
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