Re: [PATCH net-next 4/4] net: stmmac: dwmac-sun8i: Add Allwinner H616 EMAC clock index and internal PHY support

[Alastair D'Silva <alastair@d-silva.org>]

On Wed, 2026-09-16 at 08:24 +0200, Maxime Chevallier wrote:
> Hi,
> 
> > 
<snip>

> >  .../net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 65
> > ++++++++++++++++---
> >  1 file changed, 55 insertions(+), 10 deletions(-)
> > 
> > diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> > b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> > index 48c52eb96233..1728893589a6 100644
> > --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> > +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> > @@ -130,6 +130,16 @@ static const struct emac_variant
> > emac_variant_a64 = {
> >   .tx_delay_max = 7,
> >  };
> >  
> > +static const struct emac_variant emac_variant_h616_internal = {
> > + .syscon_field = &sun8i_syscon_reg_field,
> > + .soc_has_internal_phy = true,
> > + .support_mii = true,
> > + .support_rmii = true,
> > + .support_rgmii = true,
> > + .rx_delay_max = 31,
> > + .tx_delay_max = 7,
> > +};
> James's series [1] says this SoC only supports RMII (yet includes
> RGMII timing
> control), and here for seemingly the same device, there's MII and
> RGMII
> support listed.
> 
> [1] : https://lore.kernel.org/r/20260915-submit-h616-emac1-v1-v1-0-
> 195de0bb1f8a@gmail.com
> 
> Maybe you can coordinate with one another, can we connect that SoC to
> a non-internal PHY ?
> If so, can we use MII, RMII and RGMII ? or is it just RMII ?
> 
> Maxime

I just double checked, MII & RGMII are bogus.

Only EMAC0 can be connected to an external PHY.

-- 
Alastair D'Silva