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From:   Richard Zhu <hongxing.zhu@nxp.com>
To:     frank.li@nxp.com, l.stach@pengutronix.de, shawnguo@kernel.org,
        lpieralisi@kernel.org, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org
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 9/9] PCI: imx6: Add i.MX7D PCIe EP support
Date:   Mon, 14 Aug 2023 13:42:47 +0800
Message-Id: <1691991767-15809-10-git-send-email-hongxing.zhu@nxp.com>
In-Reply-To: <1691991767-15809-1-git-send-email-hongxing.zhu@nxp.com>
References: <1691991767-15809-1-git-send-email-hongxing.zhu@nxp.com>
Precedence: bulk

Add the i.MX7D PCIe EP mode support.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/pci/controller/dwc/pci-imx6.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 43c5251f5160..af7659712537 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -52,6 +52,7 @@ enum imx6_pcie_variants {
 	IMX6QP,
 	IMX6QP_EP,
 	IMX7D,
+	IMX7D_EP,
 	IMX8MQ,
 	IMX8MM,
 	IMX8MP,
@@ -359,6 +360,7 @@ static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie)
 					   0);
 		break;
 	case IMX7D:
+	case IMX7D_EP:
 		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
 				   IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, 0);
 		break;
@@ -590,6 +592,7 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
 				   IMX6Q_GPR1_PCIE_REF_CLK_EN, 1 << 16);
 		break;
 	case IMX7D:
+	case IMX7D_EP:
 		break;
 	case IMX8MM:
 	case IMX8MM_EP:
@@ -638,6 +641,7 @@ static void imx6_pcie_disable_ref_clk(struct imx6_pcie *imx6_pcie)
 				IMX6Q_GPR1_PCIE_TEST_PD);
 		break;
 	case IMX7D:
+	case IMX7D_EP:
 		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
 				   IMX7D_GPR12_PCIE_PHY_REFCLK_SEL,
 				   IMX7D_GPR12_PCIE_PHY_REFCLK_SEL);
@@ -711,6 +715,7 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
 {
 	switch (imx6_pcie->drvdata->variant) {
 	case IMX7D:
+	case IMX7D_EP:
 	case IMX8MQ:
 	case IMX8MQ_EP:
 		reset_control_assert(imx6_pcie->pciephy_reset);
@@ -763,6 +768,7 @@ static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
 		reset_control_deassert(imx6_pcie->pciephy_reset);
 		break;
 	case IMX7D:
+	case IMX7D_EP:
 		reset_control_deassert(imx6_pcie->pciephy_reset);
 
 		/* Workaround for ERR010728, failure of PCI-e PLL VCO to
@@ -854,6 +860,7 @@ static void imx6_pcie_ltssm_enable(struct device *dev)
 				   IMX6Q_GPR12_PCIE_CTL_2);
 		break;
 	case IMX7D:
+	case IMX7D_EP:
 	case IMX8MQ:
 	case IMX8MQ_EP:
 	case IMX8MM:
@@ -880,6 +887,7 @@ static void imx6_pcie_ltssm_disable(struct device *dev)
 				   IMX6Q_GPR12_PCIE_CTL_2, 0);
 		break;
 	case IMX7D:
+	case IMX7D_EP:
 	case IMX8MQ:
 	case IMX8MQ_EP:
 	case IMX8MM:
@@ -1385,6 +1393,7 @@ static int imx6_pcie_probe(struct platform_device *pdev)
 					     "pcie_aux clock source missing or invalid\n");
 		fallthrough;
 	case IMX7D:
+	case IMX7D_EP:
 		if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR)
 			imx6_pcie->controller_id = 1;
 
@@ -1572,6 +1581,12 @@ static const struct imx6_pcie_drvdata drvdata[] = {
 		.flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
 		.gpr = "fsl,imx7d-iomuxc-gpr",
 	},
+	[IMX7D_EP] = {
+		.variant = IMX7D_EP,
+		.mode = DW_PCIE_EP_TYPE,
+		.gpr = "fsl,imx7d-iomuxc-gpr",
+		.epc_features = &imx6q_pcie_epc_features,
+	},
 	[IMX8MQ] = {
 		.variant = IMX8MQ,
 		.gpr = "fsl,imx8mq-iomuxc-gpr",
@@ -1611,6 +1626,7 @@ static const struct of_device_id imx6_pcie_of_match[] = {
 	{ .compatible = "fsl,imx6qp-pcie", .data = &drvdata[IMX6QP], },
 	{ .compatible = "fsl,imx6qp-pcie-ep", .data = &drvdata[IMX6QP_EP], },
 	{ .compatible = "fsl,imx7d-pcie",  .data = &drvdata[IMX7D],  },
+	{ .compatible = "fsl,imx7d-pcie-ep", .data = &drvdata[IMX7D_EP], },
 	{ .compatible = "fsl,imx8mq-pcie", .data = &drvdata[IMX8MQ], },
 	{ .compatible = "fsl,imx8mm-pcie", .data = &drvdata[IMX8MM], },
 	{ .compatible = "fsl,imx8mp-pcie", .data = &drvdata[IMX8MP], },
-- 
2.34.1