PCI: imx6: Add i.MX8MM PCIe EP support

Add i.MX8MM PCIe EP support.

Link: https://lore.kernel.org/r/1673847684-31893-14-git-send-email-hongxing.zhu@nxp.com
Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 8190b1d..eab332e 100644 (file)
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -53,6 +53,7 @@ enum imx6_pcie_variants {
        IMX8MM,
        IMX8MP,
        IMX8MQ_EP,
+       IMX8MM_EP,
 };
 
 #define IMX6_PCIE_FLAG_IMX6_PHY                        BIT(0)
@@ -156,6 +157,7 @@ static unsigned int imx6_pcie_grp_offset(const struct imx6_pcie *imx6_pcie)
        WARN_ON(imx6_pcie->drvdata->variant != IMX8MQ &&
                imx6_pcie->drvdata->variant != IMX8MQ_EP &&
                imx6_pcie->drvdata->variant != IMX8MM &&
+               imx6_pcie->drvdata->variant != IMX8MM_EP &&
                imx6_pcie->drvdata->variant != IMX8MP);
        return imx6_pcie->controller_id == 1 ? IOMUXC_GPR16 : IOMUXC_GPR14;
 }
@@ -319,6 +321,7 @@ static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie)
 {
        switch (imx6_pcie->drvdata->variant) {
        case IMX8MM:
+       case IMX8MM_EP:
        case IMX8MP:
                /*
                 * The PHY initialization had been done in the PHY
@@ -577,6 +580,7 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
        case IMX7D:
                break;
        case IMX8MM:
+       case IMX8MM_EP:
        case IMX8MQ:
        case IMX8MQ_EP:
        case IMX8MP:
@@ -623,6 +627,7 @@ static void imx6_pcie_disable_ref_clk(struct imx6_pcie *imx6_pcie)
                                   IMX7D_GPR12_PCIE_PHY_REFCLK_SEL);
                break;
        case IMX8MM:
+       case IMX8MM_EP:
        case IMX8MQ:
        case IMX8MQ_EP:
        case IMX8MP:
@@ -694,6 +699,7 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
                reset_control_assert(imx6_pcie->pciephy_reset);
                fallthrough;
        case IMX8MM:
+       case IMX8MM_EP:
        case IMX8MP:
                reset_control_assert(imx6_pcie->apps_reset);
                break;
@@ -771,6 +777,7 @@ static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
                break;
        case IMX6Q:             /* Nothing to do */
        case IMX8MM:
+       case IMX8MM_EP:
        case IMX8MP:
                break;
        }
@@ -822,6 +829,7 @@ static void imx6_pcie_ltssm_enable(struct device *dev)
        case IMX8MQ:
        case IMX8MQ_EP:
        case IMX8MM:
+       case IMX8MM_EP:
        case IMX8MP:
                reset_control_deassert(imx6_pcie->apps_reset);
                break;
@@ -843,6 +851,7 @@ static void imx6_pcie_ltssm_disable(struct device *dev)
        case IMX8MQ:
        case IMX8MQ_EP:
        case IMX8MM:
+       case IMX8MM_EP:
        case IMX8MP:
                reset_control_assert(imx6_pcie->apps_reset);
                break;
@@ -1095,6 +1104,7 @@ static int imx6_add_pcie_ep(struct imx6_pcie *imx6_pcie,
 
        switch (imx6_pcie->drvdata->variant) {
        case IMX8MQ_EP:
+       case IMX8MM_EP:
                pcie_dbi2_offset = SZ_1M;
                break;
        default:
@@ -1307,6 +1317,7 @@ static int imx6_pcie_probe(struct platform_device *pdev)
                }
                break;
        case IMX8MM:
+       case IMX8MM_EP:
        case IMX8MP:
                imx6_pcie->pcie_aux = devm_clk_get(dev, "pcie_aux");
                if (IS_ERR(imx6_pcie->pcie_aux))
@@ -1472,6 +1483,11 @@ static const struct imx6_pcie_drvdata drvdata[] = {
                .mode = DW_PCIE_EP_TYPE,
                .gpr = "fsl,imx8mq-iomuxc-gpr",
        },
+       [IMX8MM_EP] = {
+               .variant = IMX8MM_EP,
+               .mode = DW_PCIE_EP_TYPE,
+               .gpr = "fsl,imx8mm-iomuxc-gpr",
+       },
 };
 
 static const struct of_device_id imx6_pcie_of_match[] = {
@@ -1483,6 +1499,7 @@ static const struct of_device_id imx6_pcie_of_match[] = {
        { .compatible = "fsl,imx8mm-pcie", .data = &drvdata[IMX8MM], },
        { .compatible = "fsl,imx8mp-pcie", .data = &drvdata[IMX8MP], },
        { .compatible = "fsl,imx8mq-pcie-ep", .data = &drvdata[IMX8MQ_EP], },
+       { .compatible = "fsl,imx8mm-pcie-ep", .data = &drvdata[IMX8MM_EP], },
        {},
 };