On Mon, Jul 29, 2019 at 10:04 AM Simon Horman <horms+renesas@xxxxxxxxxxxx> wrote: > * According to the R-Car Gen3 Hardware Manual Errata for Rev 1.00 of > August 24, 2018, the TX clock internal delay mode isn't supported > on R-Car E3 (r8a77990) and D3 (r8a77995). > > * TX clock internal delay mode is required for reliable 1Gbps communication > using the KSZ9031RNX phy present on the Ebisu and Draak boards. > > Thus, the E3 based Ebisu and D3 based Draak boards can not reliably > use 1Gbps and the speed should be limited to 100Mbps. > > Based on work by Kazuya Mizuguchi. > > Signed-off-by: Simon Horman <horms+renesas@xxxxxxxxxxxx> Thanks, queuing in renesas-devel for v5.4. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds