PCI: imx6: Add i.MX8MP PCIe EP support

Add the i.MX8MP PCIe EP support.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Richard Zhu <[email protected]>
Signed-off-by: Lorenzo Pieralisi <[email protected]>

Author: Richard Zhu

drivers/pci/controller/dwc/pci-imx6.c

@@ -54,6 +54,7 @@ enum imx6_pcie_variants {
 	IMX8MP,
 	IMX8MQ_EP,
 	IMX8MM_EP,
+	IMX8MP_EP,
 };
 
 #define IMX6_PCIE_FLAG_IMX6_PHY			BIT(0)
@@ -158,7 +159,8 @@ static unsigned int imx6_pcie_grp_offset(const struct imx6_pcie *imx6_pcie)
 		imx6_pcie->drvdata->variant != IMX8MQ_EP &&
 		imx6_pcie->drvdata->variant != IMX8MM &&
 		imx6_pcie->drvdata->variant != IMX8MM_EP &&
-		imx6_pcie->drvdata->variant != IMX8MP);
+		imx6_pcie->drvdata->variant != IMX8MP &&
+		imx6_pcie->drvdata->variant != IMX8MP_EP);
 	return imx6_pcie->controller_id == 1 ? IOMUXC_GPR16 : IOMUXC_GPR14;
 }
 
@@ -323,6 +325,7 @@ static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie)
 	case IMX8MM:
 	case IMX8MM_EP:
 	case IMX8MP:
+	case IMX8MP_EP:
 		/*
 		 * The PHY initialization had been done in the PHY
 		 * driver, break here directly.
@@ -584,6 +587,7 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
 	case IMX8MQ:
 	case IMX8MQ_EP:
 	case IMX8MP:
+	case IMX8MP_EP:
 		ret = clk_prepare_enable(imx6_pcie->pcie_aux);
 		if (ret) {
 			dev_err(dev, "unable to enable pcie_aux clock\n");
@@ -631,6 +635,7 @@ static void imx6_pcie_disable_ref_clk(struct imx6_pcie *imx6_pcie)
 	case IMX8MQ:
 	case IMX8MQ_EP:
 	case IMX8MP:
+	case IMX8MP_EP:
 		clk_disable_unprepare(imx6_pcie->pcie_aux);
 		break;
 	default:
@@ -701,6 +706,7 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
 	case IMX8MM:
 	case IMX8MM_EP:
 	case IMX8MP:
+	case IMX8MP_EP:
 		reset_control_assert(imx6_pcie->apps_reset);
 		break;
 	case IMX6SX:
@@ -779,6 +785,7 @@ static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
 	case IMX8MM:
 	case IMX8MM_EP:
 	case IMX8MP:
+	case IMX8MP_EP:
 		break;
 	}
 
@@ -831,6 +838,7 @@ static void imx6_pcie_ltssm_enable(struct device *dev)
 	case IMX8MM:
 	case IMX8MM_EP:
 	case IMX8MP:
+	case IMX8MP_EP:
 		reset_control_deassert(imx6_pcie->apps_reset);
 		break;
 	}
@@ -853,6 +861,7 @@ static void imx6_pcie_ltssm_disable(struct device *dev)
 	case IMX8MM:
 	case IMX8MM_EP:
 	case IMX8MP:
+	case IMX8MP_EP:
 		reset_control_assert(imx6_pcie->apps_reset);
 		break;
 	}
@@ -1105,6 +1114,7 @@ static int imx6_add_pcie_ep(struct imx6_pcie *imx6_pcie,
 	switch (imx6_pcie->drvdata->variant) {
 	case IMX8MQ_EP:
 	case IMX8MM_EP:
+	case IMX8MP_EP:
 		pcie_dbi2_offset = SZ_1M;
 		break;
 	default:
@@ -1319,6 +1329,7 @@ static int imx6_pcie_probe(struct platform_device *pdev)
 	case IMX8MM:
 	case IMX8MM_EP:
 	case IMX8MP:
+	case IMX8MP_EP:
 		imx6_pcie->pcie_aux = devm_clk_get(dev, "pcie_aux");
 		if (IS_ERR(imx6_pcie->pcie_aux))
 			return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_aux),
@@ -1488,6 +1499,11 @@ static const struct imx6_pcie_drvdata drvdata[] = {
 		.mode = DW_PCIE_EP_TYPE,
 		.gpr = "fsl,imx8mm-iomuxc-gpr",
 	},
+	[IMX8MP_EP] = {
+		.variant = IMX8MP_EP,
+		.mode = DW_PCIE_EP_TYPE,
+		.gpr = "fsl,imx8mp-iomuxc-gpr",
+	},
 };
 
 static const struct of_device_id imx6_pcie_of_match[] = {
@@ -1500,6 +1516,7 @@ static const struct of_device_id imx6_pcie_of_match[] = {
 	{ .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], },
+	{ .compatible = "fsl,imx8mp-pcie-ep", .data = &drvdata[IMX8MP_EP], },
 	{},
 };