INT_EP_CTL
ret = lan78xx_read_reg(dev, INT_EP_CTL, &buf);
ret = lan78xx_write_reg(dev, INT_EP_CTL, data->irqenable);
ret = lan78xx_read_reg(dev, INT_EP_CTL, &buf);
ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);