On Tuesday 26 April 2016 20:23:35 Andrew Lunn wrote: > > A more complex problem would be having a PHY driver for a device > > that can be either an ethernet phy or some other phy. > > I doubt that ever happens. You can have up to 32 different devices on > an MDIO bus. Since an Ethernet PHY and a "some other sort of PHY" are > completely different things, why would a hardware engineer place them > on the same address? It is like saying your ATA controller and VGA > controller share the same slot on the PCI bus... To clarify: what I meant is a device that is designed as a PHY for similar hardware (e.g. SATA, USB3 and PCIe) and that has a common register set and a single driver, but that driver can operate in multiple modes. You typically have multiple instances of such hardware, with each instance linked to exactly one host device, but one driver for all of them. See Documentation/devicetree/bindings/phy/apm-xgene-phy.txt and drivers/phy/phy-xgene.c for one such example. Arnd -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
