From: Christian Lamparter <chunk...@gmail.com> Date: Tue, 19 Mar 2019 20:54:19 +0100
> This patch implements accessors for the QCA8337 MDIO access > through the MDIO_MASTER register, which makes it possible to > access the PHYs on slave-bus through the switch. In cases > where the switch ports are already mapped via external > "phy-phandles", the internal mdio-bus is disabled in order to > prevent a duplicated discovery and enumeration of the same > PHYs. Don't use mixed external and internal mdio-bus > configurations, as this is not supported by the hardware. > > Signed-off-by: Christian Lamparter <chunk...@gmail.com> > --- > Changes from v2: > - Make it compatible with existing configurations > - make it clear that's sadly a either external or > internal mdio bus access. > > Changes from v1: > - drop DT port <-> phy mapping > - added register definitions for the MDIO control register > - implemented new slave-mdio bus accessors > - DT-binding: fix switch's PSEUDO_PHY address. It's 0x10 not 0. > > Old patch (+ discussion) for reference: > <https://patchwork.ozlabs.org/patch/1036309/> Would be great to get some review on this. But I have a coding style change request: > +static int > +qca8k_setup_mdio_bus(struct qca8k_priv *priv) > +{ > + struct device_node *ports, *port; > + struct mii_bus *bus; > + u32 internal_mdio_mask = 0; > + u32 external_mdio_mask = 0; > + u32 reg; > + int err; Reverse christmas tree ordering here please.
