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. Thanks Kishon -- 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
