On Fri, Jul 19, 2013 at 11:25:44AM +0530, Kishon Vijay Abraham I wrote: > Hi, > > On Friday 19 July 2013 11:13 AM, Greg KH wrote: > > On Fri, Jul 19, 2013 at 11:07:10AM +0530, Kishon Vijay Abraham I wrote: > >>>>>> + ret = dev_set_name(&phy->dev, "%s.%d", dev_name(dev), id); > >>>>> > >>>>> Your naming is odd, no "phy" anywhere in it? You rely on the sender to > >>>>> never send a duplicate name.id pair? Why not create your own ids based > >>>>> on the number of phys in the system, like almost all other classes and > >>>>> subsystems do? > >>>> > >>>> hmm.. some PHY drivers use the id they provide to perform some of their > >>>> internal operation as in [1] (This is used only if a single PHY provider > >>>> implements multiple PHYS). Probably I'll add an option like PLATFORM_DEVID_AUTO > >>>> to give the PHY drivers an option to use auto id. > >>>> > >>>> [1] -> > >>>> http://archive.arm.linux.org.uk/lurker/message/20130628.134308.4a8f7668.ca.html > >>> > >>> No, who cares about the id? No one outside of the phy core ever should, > >>> because you pass back the only pointer that they really do care about, > >>> if they need to do anything with the device. Use that, and then you can > >> > >> hmm.. ok. > >> > >>> rip out all of the "search for a phy by a string" logic, as that's not > >> > >> Actually this is needed for non-dt boot case. In the case of dt boot, we use a > >> phandle by which the controller can get a reference to the phy. But in the case > >> of non-dt boot, the controller can get a reference to the phy only by label. > > > > I don't understand. They registered the phy, and got back a pointer to > > it. Why can't they save it in their local structure to use it again > > later if needed? They should never have to "ask" for the device, as the > > One is a *PHY provider* driver which is a driver for some PHY device. This will > use phy_create to create the phy. > The other is a *PHY consumer* driver which might be any controller driver (can > be USB/SATA/PCIE). The PHY consumer will use phy_get to get a reference to the > phy (by *phandle* in the case of dt boot and *label* in the case of non-dt boot). > > device id might be unknown if there are multiple devices in the system. > > I agree with you on the device id part. That need not be known to the PHY driver. How does a consumer know which "label" to use in a non-dt system if there are multiple PHYs in the system? Do you have any drivers that are non-dt using this yet? greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
