linux-kernel - [PATCH v4 8/9] PCI: imx6: Add i.MX6SX PCIe EP support

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Message-Id: <1691991767-15809-9-git-send-email-hongxing.zhu@nxp.com>
Date:   Mon, 14 Aug 2023 13:42:46 +0800
From:   Richard Zhu <hongxing.zhu@....com>
To:     frank.li@....com, l.stach@...gutronix.de, shawnguo@...nel.org,
        lpieralisi@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org
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 v4 8/9] PCI: imx6: Add i.MX6SX PCIe EP support

Add the i.MX6SX PCIe EP support.

Signed-off-by: Richard Zhu <hongxing.zhu@....com>
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 drivers/pci/controller/dwc/pci-imx6.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 9a6531ddfef2..43c5251f5160 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -48,6 +48,7 @@ enum imx6_pcie_variants {
 	IMX6Q,
 	IMX6Q_EP,
 	IMX6SX,
+	IMX6SX_EP,
 	IMX6QP,
 	IMX6QP_EP,
 	IMX7D,
@@ -362,6 +363,7 @@ static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie)
 				   IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, 0);
 		break;
 	case IMX6SX:
+	case IMX6SX_EP:
 		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
 				   IMX6SX_GPR12_PCIE_RX_EQ_MASK,
 				   IMX6SX_GPR12_PCIE_RX_EQ_2);
@@ -560,6 +562,7 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
 
 	switch (imx6_pcie->drvdata->variant) {
 	case IMX6SX:
+	case IMX6SX_EP:
 		ret = clk_prepare_enable(imx6_pcie->pcie_inbound_axi);
 		if (ret) {
 			dev_err(dev, "unable to enable pcie_axi clock\n");
@@ -621,6 +624,7 @@ static void imx6_pcie_disable_ref_clk(struct imx6_pcie *imx6_pcie)
 {
 	switch (imx6_pcie->drvdata->variant) {
 	case IMX6SX:
+	case IMX6SX_EP:
 		clk_disable_unprepare(imx6_pcie->pcie_inbound_axi);
 		break;
 	case IMX6QP:
@@ -718,6 +722,7 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
 		reset_control_assert(imx6_pcie->apps_reset);
 		break;
 	case IMX6SX:
+	case IMX6SX_EP:
 		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
 				   IMX6SX_GPR12_PCIE_TEST_POWERDOWN,
 				   IMX6SX_GPR12_PCIE_TEST_POWERDOWN);
@@ -782,6 +787,7 @@ static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
 		imx7d_pcie_wait_for_phy_pll_lock(imx6_pcie);
 		break;
 	case IMX6SX:
+	case IMX6SX_EP:
 		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR5,
 				   IMX6SX_GPR5_PCIE_BTNRST_RESET, 0);
 		break;
@@ -840,6 +846,7 @@ static void imx6_pcie_ltssm_enable(struct device *dev)
 	case IMX6Q:
 	case IMX6Q_EP:
 	case IMX6SX:
+	case IMX6SX_EP:
 	case IMX6QP:
 	case IMX6QP_EP:
 		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
@@ -866,6 +873,7 @@ static void imx6_pcie_ltssm_disable(struct device *dev)
 	case IMX6Q:
 	case IMX6Q_EP:
 	case IMX6SX:
+	case IMX6SX_EP:
 	case IMX6QP:
 	case IMX6QP_EP:
 		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
@@ -1198,6 +1206,7 @@ static void imx6_pcie_pm_turnoff(struct imx6_pcie *imx6_pcie)
 	/* Others poke directly at IOMUXC registers */
 	switch (imx6_pcie->drvdata->variant) {
 	case IMX6SX:
+	case IMX6SX_EP:
 	case IMX6QP:
 	case IMX6QP_EP:
 		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
@@ -1361,6 +1370,7 @@ static int imx6_pcie_probe(struct platform_device *pdev)
 
 	switch (imx6_pcie->drvdata->variant) {
 	case IMX6SX:
+	case IMX6SX_EP:
 		imx6_pcie->pcie_inbound_axi = devm_clk_get(dev,
 							   "pcie_inbound_axi");
 		if (IS_ERR(imx6_pcie->pcie_inbound_axi))
@@ -1535,6 +1545,13 @@ static const struct imx6_pcie_drvdata drvdata[] = {
 			 IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
 		.gpr = "fsl,imx6q-iomuxc-gpr",
 	},
+	[IMX6SX_EP] = {
+		.variant = IMX6SX_EP,
+		.mode = DW_PCIE_EP_TYPE,
+		.flags = IMX6_PCIE_FLAG_IMX6_PHY,
+		.gpr = "fsl,imx6q-iomuxc-gpr",
+		.epc_features = &imx6q_pcie_epc_features,
+	},
 	[IMX6QP] = {
 		.variant = IMX6QP,
 		.flags = IMX6_PCIE_FLAG_IMX6_PHY |
@@ -1590,6 +1607,7 @@ static const struct of_device_id imx6_pcie_of_match[] = {
 	{ .compatible = "fsl,imx6q-pcie",  .data = &drvdata[IMX6Q],  },
 	{ .compatible = "fsl,imx6q-pcie-ep", .data = &drvdata[IMX6Q_EP], },
 	{ .compatible = "fsl,imx6sx-pcie", .data = &drvdata[IMX6SX], },
+	{ .compatible = "fsl,imx6sx-pcie-ep", .data = &drvdata[IMX6SX_EP], },
 	{ .compatible = "fsl,imx6qp-pcie", .data = &drvdata[IMX6QP], },
 	{ .compatible = "fsl,imx6qp-pcie-ep", .data = &drvdata[IMX6QP_EP], },
 	{ .compatible = "fsl,imx7d-pcie",  .data = &drvdata[IMX7D],  },
-- 
2.34.1