PARF_LTSSM
val = readl_relaxed(pcie_ep->parf + PARF_LTSSM);
writel_relaxed(val, pcie_ep->parf + PARF_LTSSM);
val = readl(pcie->parf + PARF_LTSSM);
val = readl(pcie->parf + PARF_LTSSM);
writel(val, pcie->parf + PARF_LTSSM);