Re: [PATCH v2 net 2/2] net: stmmac: dwmac-imx: pause the TXC clock in fixed-link

[Fabio Estevam]

On Thu, Jul 27, 2023 at 12:25 PM Shenwei Wang <shenwei.wang@xxxxxxx> wrote:

>         struct plat_stmmacenet_data *plat_dat = priv;
> @@ -317,8 +359,11 @@ static int imx_dwmac_probe(struct platform_device *pdev)
>         plat_dat->exit = imx_dwmac_exit;
>         plat_dat->clks_config = imx_dwmac_clks_config;
>         plat_dat->fix_mac_speed = imx_dwmac_fix_speed;
> +       if (of_machine_is_compatible("fsl,imx93"))
> +               plat_dat->fix_mac_speed = imx_dwmac_fix_speed_mx93;

So you are forcing this on all imx93 boards, even if they don't use a SJA1105.

Andrew Lunn gave the following feedback in v1:

"The SJA1105 has the problem, so i would expect it to be involved in
the solution. Otherwise, how is this going to work for other MAC
drivers?

Maybe you need to expose a common clock framework clock for the TXC
clock line, which the SJA1105 can disable/enable? That then makes it
clear what other MAC drivers need to do."