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From:   Richard Zhu <hongxing.zhu@nxp.com>
To:     l.stach@pengutronix.de, bhelgaas@google.com, robh+dt@kernel.org,
        lorenzo.pieralisi@arm.com, shawnguo@kernel.org, kishon@ti.com,
        kw@linux.com, frank.li@nxp.com
Cc:     hongxing.zhu@nxp.com, linux-pci@vger.kernel.org,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org, kernel@pengutronix.de,
        linux-imx@nxp.com
Subject: [PATCH v4 13/14] PCI: imx6: Add i.MX8MM PCIe EP support
Date:   Tue, 27 Sep 2022 16:57:15 +0800
Message-Id: <1664269036-16142-14-git-send-email-hongxing.zhu@nxp.com>
In-Reply-To: <1664269036-16142-1-git-send-email-hongxing.zhu@nxp.com>
References: <1664269036-16142-1-git-send-email-hongxing.zhu@nxp.com>
Precedence: bulk

Add i.MX8MM PCIe EP support.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
---
 drivers/pci/controller/dwc/pci-imx6.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 777ad946ec7f..907a36e18842 100644
--- 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;
@@ -1094,6 +1103,7 @@ 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:
@@ -1306,6 +1316,7 @@ 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))
@@ -1471,6 +1482,11 @@ 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[] = {
@@ -1482,6 +1498,7 @@ 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], },
 	{},
 };
 
-- 
2.25.1