On Fri, May 3, 2019 at 8:15 PM Jagan Teki <ja...@amarulasolutions.com> wrote: > > On Fri, May 3, 2019 at 3:31 PM Chen-Yu Tsai <w...@kernel.org> wrote: > > > > On Fri, May 3, 2019 at 5:49 PM Jagan Teki <ja...@amarulasolutions.com> > > wrote: > > > > > > On Fri, May 3, 2019 at 7:58 AM Chen-Yu Tsai <w...@kernel.org> wrote: > > > > > > > > From: Chen-Yu Tsai <w...@csie.org> > > > > > > > > Hi everyone, > > > > > > > > This series enables EMAC (Ethernet controller) on two A83T boards, > > > > the Cubietruck Plus and Bananapi M3. > > > > > > > > This series is now based on sunxi/next, which has patches that convert > > > > sun8i-emac to use the common CLK and DM_RESET framework. > > > > > > > > The two patches enable the sun8i-emac and Realtek PHY driver in their > > > > > > So, the U-Boot operates realtek than what Linux does via > > > ethernet-phy-ieee802.3-c22 right? if someone add it in future it will > > > override realtek since we have a dts compatible enabled it dts files > > > already isn't it? > > > > What? No. The PHY vendor and model are automatically detected by reading > > the standard registers in the PHY. The compatible string is only used to > > determine how to access the registers. c22 vs c45 define different ways > > of accessing registers, as well as a larger address space for c45. > > > > See https://www.totalphase.com/support/articles/200349206-MDIO-Background > > > > By reading the vendor and model IDs, the system, be it Linux or U-boot, > > can then go through the list of registered PHY drivers to find a match, > > or fall back to some generic implementation. > > Yes, I understand thanks. > > > > > It used to be you needed to enable the Realtek driver for gigabit links > > to work properly, but that seems to have been fixed. Nevertheless, having > > the specific driver enabled is better. > > Ah.. this is what exactly I tried before in Linux since it doesn't > enable default in sunxi_defconfig. on the other-hand the existing > generic compatible is also working for gigabit links as well.
Yeah. My memories of it not working are from way back, before the whole DM conversion even started. I think it's still better to have the specific driver enabled though, as the PHY has some vendor specific features or status flags. ChenYu _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
