linux-kernel - [PATCH v3 14/14] PCI: imx6: Add iMX8MP PCIe EP support

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Date:   Fri, 23 Sep 2022 14:07:00 +0800
From:   Richard Zhu <hongxing.zhu@....com>
To:     l.stach@...gutronix.de, bhelgaas@...gle.com, robh+dt@...nel.org,
        lorenzo.pieralisi@....com, shawnguo@...nel.org, kishon@...com,
        kw@...ux.com, frank.li@....com
Cc:     hongxing.zhu@....com, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, kernel@...gutronix.de,
        linux-imx@....com
Subject: [PATCH v3 14/14] PCI: imx6: Add iMX8MP PCIe EP support

Add the iMX8MP PCIe EP support

Signed-off-by: Richard Zhu <hongxing.zhu@....com>
---
 drivers/pci/controller/dwc/pci-imx6.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 931243e36252..e339e32d97f8 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -54,6 +54,7 @@ enum imx6_pcie_variants {
 	IMX8MP,
 	IMX8MM_EP,
 	IMX8MQ_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;
 	}
@@ -1104,6 +1113,7 @@ static int imx6_add_pcie_ep(struct imx6_pcie *imx6_pcie,
 	switch (imx6_pcie->drvdata->variant) {
 	case IMX8MM_EP:
 	case IMX8MQ_EP:
+	case IMX8MP_EP:
 		pcie_dbi2_offset = SZ_1M;
 		break;
 	default:
@@ -1318,6 +1328,7 @@ 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),
@@ -1487,6 +1498,11 @@ static const struct imx6_pcie_drvdata drvdata[] = {
 		.mode = DW_PCIE_EP_TYPE,
 		.gpr = "fsl,imx8mq-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[] = {
@@ -1499,6 +1515,7 @@ static const struct of_device_id imx6_pcie_of_match[] = {
 	{ .compatible = "fsl,imx8mp-pcie", .data = &drvdata[IMX8MP], },
 	{ .compatible = "fsl,imx8mm-pcie-ep", .data = &drvdata[IMX8MM_EP], },
 	{ .compatible = "fsl,imx8mq-pcie-ep", .data = &drvdata[IMX8MQ_EP], },
+	{ .compatible = "fsl,imx8mp-pcie-ep", .data = &drvdata[IMX8MP_EP], },
 	{},
 };
 
-- 
2.25.1