RP_LINK_CONTROL_STATUS_2
value = readl(port->base + RP_LINK_CONTROL_STATUS_2);
writel(value, port->base + RP_LINK_CONTROL_STATUS_2);
value = readl(port->base + RP_LINK_CONTROL_STATUS_2);
writel(value, port->base + RP_LINK_CONTROL_STATUS_2);