On Wed, 20 Aug 2025 at 19:09, Prabhakar <prabhakar.csengg@xxxxxxxxx> wrote: > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> > > Correct the Mode Control Register (MODCTRL) offset for RZ/N MIIC. > According to the R-IN Engine and Ethernet Peripherals Manual (Rev.1.30) > [0], Table 10.1 "Ethernet Accessory Register List", MODCTRL is at offset > 0x8, not 0x20 as previously defined. > > Offset 0x20 actually maps to the Port Trigger Control Register (PTCTRL), > which controls PTP_MODE[3:0] and RGMII_CLKSEL[4]. Using this incorrect > definition prevented the driver from configuring the SW_MODE[4:0] bits > in MODCTRL, which control the internal connection of Ethernet ports. As > a result, the MIIC could not be switched into the correct mode, leading > to link setup failures and non-functional Ethernet ports on affected > systems. > > [0] https://www.renesas.com/en/document/mah/rzn1d-group-rzn1s-group-rzn1l-group-users-manual-r-engine-and-ethernet-peripherals?r=1054571 > > Fixes: 7dc54d3b8d91 ("net: pcs: add Renesas MII converter driver") > Cc: stable@xxxxxxxxxx > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> > Reviewed-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> 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
