>  static void
>  fec_stop(struct net_device *ndev)
>  {
>  	struct fec_enet_private *fep = netdev_priv(ndev);
> -	u32 rmii_mode = readl(fep->hwp + FEC_R_CNTRL) & FEC_RCR_RMII;
> +	u32 rmii_mode = fec_readl(fep->hwp + FEC_R_CNTRL) & FEC_RCR_RMII;

This is not an issue, but since you changed this line, the new code should
follow the "reverse xmas tree" style.

See: https://elixir.bootlin.com/linux/v7.0.1/source/Documentation/process/maintainer-netdev.rst#L380

>  	u32 val;
> 
>  	/* We cannot expect a graceful transmit stop without link !!! */
>  	if (fep->link) {
> -		writel(1, fep->hwp + FEC_X_CNTRL); /* Graceful transmit stop */
> +		fec_writel(1, fep->hwp + FEC_X_CNTRL); /* Graceful transmit stop */
>  		udelay(10);
> -		if (!(readl(fep->hwp + FEC_IEVENT) & FEC_ENET_GRA))
> +		if (!(fec_readl(fep->hwp + FEC_IEVENT) & FEC_ENET_GRA))
>  			netdev_err(ndev, "Graceful transmit stop did not complete!\n");
>  	}
>