PCI: imx6: Enable i.MX6QP PCIe power management support

i.MX6QP PCIe supports the reset logic, thus it can reset itself to the
initialized state when exit from L2 or L3 states.

Enable the i.MX6QP PCIe suspend/resume operations support.

Link: https://lore.kernel.org/r/1645425237-4071-2-git-send-email-hongxing.zhu@nxp.com
Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 7b200b66114afb198bcb05815e7de5bf6d6b9501..5fd33e4536af3ccfc1e684ff1e4f04db012d0528 100644 (file)
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -917,6 +917,7 @@ static void imx6_pcie_pm_turnoff(struct imx6_pcie *imx6_pcie)
        /* Others poke directly at IOMUXC registers */
        switch (imx6_pcie->drvdata->variant) {
        case IMX6SX:
+       case IMX6QP:
                regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
                                IMX6SX_GPR12_PCIE_PM_TURN_OFF,
                                IMX6SX_GPR12_PCIE_PM_TURN_OFF);
@@ -1246,7 +1247,8 @@ static const struct imx6_pcie_drvdata drvdata[] = {
        [IMX6QP] = {
                .variant = IMX6QP,
                .flags = IMX6_PCIE_FLAG_IMX6_PHY |
-                        IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE,
+                        IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE |
+                        IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
                .dbi_length = 0x200,
        },
        [IMX7D] = {