On Thu, Apr 28, 2016 at 02:55:10PM -0700, Florian Fainelli wrote: > Add a check whether the 'struct device_node' pointer passed to > of_mdiobus_register() is an available (aka enabled) node in the Device > Tree. > > Rationale for doing this are cases where an Ethernet MAC provides a MDIO > bus controller and node, and an additional Ethernet MAC might be > connecting its PHY/switches to that first MDIO bus controller, while > still embedding one internally which is therefore marked as "disabled". > > Instead of sprinkling checks like these in callers of > of_mdiobus_register(), do this in a central location. I think this discussion has shown there is no documented best practices for MDIO bus drivers and how PHYs nodes are placed within device tree. Maybe you could document the generic MDIO binding, both as integrated into a MAC device node, and as a separate device? Andrew -- 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
