Re: [PATCH 7/7] drivers: net: macb: add fu740 support

[Bin Meng]

On Thu, Mar 11, 2021 at 9:50 PM Green Wan <green....@sifive.com> wrote:
>
> Add fu740 support to macb ethernet driver
>
> Signed-off-by: Green Wan <green....@sifive.com>
> ---
>  drivers/net/macb.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/macb.c b/drivers/net/macb.c
> index 57ea45e..df65d82 100644
> --- a/drivers/net/macb.c
> +++ b/drivers/net/macb.c
> @@ -592,7 +592,11 @@ static int macb_sifive_clk_init(struct udevice *dev, 
> ulong rate)
>          *     and output clock on GMII output signal GTX_CLK
>          * 1 = MII mode. Use MII input signal TX_CLK in TX logic
>          */
> -       writel(rate != 125000000, gemgxl_regs);
> +       if (device_is_compatible(dev, "sifive,fu540-c000-gem"))
> +               writel(rate != 125000000, gemgxl_regs);
> +       else if (device_is_compatible(dev, "sifive,fu740-c000-gem"))
> +               writel(rate != 125125000, gemgxl_regs);

125125000 seems to be an odd value for 1000 Mbps ethernet. Can you
please explain this a little bit?

> +
>         return 0;
>  }
>
> @@ -1507,6 +1511,8 @@ static const struct udevice_id macb_eth_ids[] = {
>         { .compatible = "cdns,zynq-gem" },
>         { .compatible = "sifive,fu540-c000-gem",
>           .data = (ulong)&sifive_config },
> +       { .compatible = "sifive,fu740-c000-gem",
> +         .data = (ulong)&sifive_config },
>         { .compatible = "microchip,mpfs-mss-gem",
>           .data = (ulong)&microchip_config },
>         { }
>

Regards,
Bin