Hi, On Friday 19 July 2013 11:59 AM, Greg KH wrote: > 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? That should be passed using platform data. > > Do you have any drivers that are non-dt using this yet? yes. tw4030 (used in OMAP3) supports non-dt. [PATCH 04/15] ARM: OMAP: USB: Add phy binding information [PATCH 06/15] usb: musb: omap2430: use the new generic PHY framework of this patch series shows how it's used. Thanks Kishon -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
