+
+ /* Workaround for ERR010728, failure of PCI-e PLL VCO to
+ * oscillate, especially when cold. This turns off "Duty-cycle
+ * Corrector" and other mysterious undocumented things.
+ */
+ if (likely(imx6_pcie->phy_base)) {
+ /* De-assert DCC_FB_EN */
+ writel(PCIE_PHY_CMN_REG4_DCC_FB_EN,
+ imx6_pcie->phy_base + PCIE_PHY_CMN_REG4);
+ /* Assert RX_EQS and RX_EQS_SEL */
+ writel(PCIE_PHY_CMN_REG24_RX_EQ_SEL
+ | PCIE_PHY_CMN_REG24_RX_EQ,
+ imx6_pcie->phy_base + PCIE_PHY_CMN_REG24);
+ /* Assert ATT_MODE */
+ writel(PCIE_PHY_CMN_REG26_ATT_MODE,
+ imx6_pcie->phy_base + PCIE_PHY_CMN_REG26);
+ } else {
+ dev_warn(dev, "Unable to apply ERR010728 workaround. DT missing fsl,imx7d-pcie-phy phandle ?\n");
+ }
+