From: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> Date: Thu, 18 May 2017 14:59:05 +0200 > If an Ethernet PHY is initialized before the interrupt controller it is > connected to, a message like the following is printed: > > irq: no irq domain found for /interrupt-controller@e61c0000 ! > > However, the actual error is ignored, leading to a non-functional (-1) > PHY interrupt later: > > Micrel KSZ8041RNLI ee700000.ethernet-ffffffff:01: attached PHY driver [Micrel KSZ8041RNLI] (mii_bus:phy_addr=ee700000.ethernet-ffffffff:01, irq=-1) > > Depending on whether the PHY driver will fall back to polling, Ethernet > may or may not work. > > To fix this: > 1. Switch of_mdiobus_register_phy() from irq_of_parse_and_map() to > of_irq_get(). > Unlike the former, the latter returns -EPROBE_DEFER if the > interrupt controller is not yet available, so this condition can be > detected. > Other errors are handled the same as before, i.e. use the passed > mdio->irq[addr] as interrupt. > 2. Propagate and handle errors from of_mdiobus_register_phy() and > of_mdiobus_register_device(). > > Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> Florian or someone similarly knowledgable, please review.
