AM65_CPSW_PN_REG_EST_CTL
val = readl(port->port_base + AM65_CPSW_PN_REG_EST_CTL);
writel(val, port->port_base + AM65_CPSW_PN_REG_EST_CTL);
val = readl(port->port_base + AM65_CPSW_PN_REG_EST_CTL);
val = readl(port->port_base + AM65_CPSW_PN_REG_EST_CTL);
writel(val, port->port_base + AM65_CPSW_PN_REG_EST_CTL);