回覆: [net-next 3/3] net: ftgmac100: Support for AST2700

From: Jacky Chou
Date: Wed Nov 13 2024 - 20:46:32 EST


Hi Maxime

Thank you for your reply.

> > The AST2700 is the 7th generation SoC from Aspeed, featuring three
> > GPIO controllers that are support 64-bit DMA capability.
> > Adding features is shown in the following list.
> > 1.Support 64-bit DMA
> > Add the high address (63:32) registers for description address and the
> > description field for packet buffer with high address part.
> > These registers and fields in legacy Aspeed SoC are reserved.
> > This 64-bit DMA changing has verified on legacy Aspeed Soc, like
> > AST2600.
>
> Maybe each of these features should be in a dedicated patch ?

Agree. I will separate them into separate patches on next version.

>
> > 2.Set RMII pin strap in AST2700 compitable
> compatible
>
> > Use bit 20 of MAC 0x50 to represent the pin strap of AST2700 RMII and
> > RGMII. Set to 1 is RMII pin, otherwise is RGMII.
> > This bis is also reserved in legacy Aspeed SoC.
> > Signed-off-by: Jacky Chou <jacky_chou@xxxxxxxxxxxxxx>
>
> [...]
>
> > @@ -349,6 +354,10 @@ static void ftgmac100_start_hw(struct ftgmac100
> *priv)
> > if (priv->netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
> > maccr |= FTGMAC100_MACCR_RM_VLAN;
> >
> > + if (of_device_is_compatible(priv->dev->of_node, "aspeed,ast2700-mac")
> &&
> > + priv->netdev->phydev->interface == PHY_INTERFACE_MODE_RMII)
> > + maccr |= FTGMAC100_MACCR_RMII_ENABLE;
>
> The driver code takes the assumption that netdev->phydev might be NULL, I
> think you should therefore add an extra check here as well before getting the
> interface mode.

Agree. I will add a check for netdev->phydev here. Perhaps it is null.

Thanks,
Jacky