MAC_CTRL_REG
old_ctrl = readl(dwmac->base_addr + MAC_CTRL_REG);
writel(ctrl, dwmac->base_addr + MAC_CTRL_REG);
readl(dwmac->base_addr + MAC_CTRL_REG);
writel(old_ctrl, dwmac->base_addr + MAC_CTRL_REG);
writel(RMII_RESET_SPEED, ioaddr + MAC_CTRL_REG);
if (readl(ptr->ioaddr + MAC_CTRL_REG) &
old_val = readl(ioaddr + MAC_CTRL_REG);
writel(value, ioaddr + MAC_CTRL_REG);
old_ctrl = readl(priv->ioaddr + MAC_CTRL_REG);
writel(ctrl, priv->ioaddr + MAC_CTRL_REG);