PCIE_CORE_DEV_REV_REG
cpu_to_le32(advk_readl(pcie, PCIE_CORE_DEV_REV_REG) & 0xff);
reg = advk_readl(pcie, PCIE_CORE_DEV_REV_REG);
advk_writel(pcie, reg, PCIE_CORE_DEV_REV_REG);