10 files changed, 480 insertions, 349 deletions

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index dc2c036ab2..99a60270b2 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -42,6 +42,19 @@
 #define IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE	GENMASK(11, 8)
 #define IMX8MQ_PCIE2_BASE_ADDR			0x33c00000
 
+#define IMX95_PCIE_PHY_GEN_CTRL			0x0
+#define IMX95_PCIE_REF_USE_PAD			BIT(17)
+
+#define IMX95_PCIE_SS_RW_REG_0			0xf0
+#define IMX95_PCIE_REF_CLKEN			BIT(23)
+#define IMX95_PCIE_PHY_CR_PARA_SEL		BIT(9)
+
+#define IMX95_PE0_GEN_CTRL_1			0x1050
+#define IMX95_PCIE_DEVICE_TYPE			GENMASK(3, 0)
+
+#define IMX95_PE0_GEN_CTRL_3			0x1058
+#define IMX95_PCIE_LTSSM_EN			BIT(0)
+
 #define to_imx6_pcie(x)	dev_get_drvdata((x)->dev)
 
 enum imx6_pcie_variants {
@@ -52,14 +65,29 @@ enum imx6_pcie_variants {
 	IMX8MQ,
 	IMX8MM,
 	IMX8MP,
+	IMX95,
 	IMX8MQ_EP,
 	IMX8MM_EP,
 	IMX8MP_EP,
+	IMX95_EP,
 };
 
 #define IMX6_PCIE_FLAG_IMX6_PHY			BIT(0)
 #define IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE	BIT(1)
 #define IMX6_PCIE_FLAG_SUPPORTS_SUSPEND		BIT(2)
+#define IMX6_PCIE_FLAG_HAS_PHYDRV			BIT(3)
+#define IMX6_PCIE_FLAG_HAS_APP_RESET		BIT(4)
+#define IMX6_PCIE_FLAG_HAS_PHY_RESET		BIT(5)
+#define IMX6_PCIE_FLAG_HAS_SERDES		BIT(6)
+#define IMX6_PCIE_FLAG_SUPPORT_64BIT		BIT(7)
+
+#define imx6_check_flag(pci, val)     (pci->drvdata->flags & val)
+
+#define IMX6_PCIE_MAX_CLKS       6
+
+#define IMX6_PCIE_MAX_INSTANCES			2
+
+struct imx6_pcie;
 
 struct imx6_pcie_drvdata {
 	enum imx6_pcie_variants variant;
@@ -67,6 +95,14 @@ struct imx6_pcie_drvdata {
 	u32 flags;
 	int dbi_length;
 	const char *gpr;
+	const char * const *clk_names;
+	const u32 clks_cnt;
+	const u32 ltssm_off;
+	const u32 ltssm_mask;
+	const u32 mode_off[IMX6_PCIE_MAX_INSTANCES];
+	const u32 mode_mask[IMX6_PCIE_MAX_INSTANCES];
+	const struct pci_epc_features *epc_features;
+	int (*init_phy)(struct imx6_pcie *pcie);
 };
 
 struct imx6_pcie {
@@ -74,11 +110,7 @@ struct imx6_pcie {
 	int			reset_gpio;
 	bool			gpio_active_high;
 	bool			link_is_up;
-	struct clk		*pcie_bus;
-	struct clk		*pcie_phy;
-	struct clk		*pcie_inbound_axi;
-	struct clk		*pcie;
-	struct clk		*pcie_aux;
+	struct clk_bulk_data	clks[IMX6_PCIE_MAX_CLKS];
 	struct regmap		*iomuxc_gpr;
 	u16			msi_ctrl;
 	u32			controller_id;
@@ -165,34 +197,44 @@ static unsigned int imx6_pcie_grp_offset(const struct imx6_pcie *imx6_pcie)
 	return imx6_pcie->controller_id == 1 ? IOMUXC_GPR16 : IOMUXC_GPR14;
 }
 
+static int imx95_pcie_init_phy(struct imx6_pcie *imx6_pcie)
+{
+	regmap_update_bits(imx6_pcie->iomuxc_gpr,
+			IMX95_PCIE_SS_RW_REG_0,
+			IMX95_PCIE_PHY_CR_PARA_SEL,
+			IMX95_PCIE_PHY_CR_PARA_SEL);
+
+	regmap_update_bits(imx6_pcie->iomuxc_gpr,
+			   IMX95_PCIE_PHY_GEN_CTRL,
+			   IMX95_PCIE_REF_USE_PAD, 0);
+	regmap_update_bits(imx6_pcie->iomuxc_gpr,
+			   IMX95_PCIE_SS_RW_REG_0,
+			   IMX95_PCIE_REF_CLKEN,
+			   IMX95_PCIE_REF_CLKEN);
+
+	return 0;
+}
+
 static void imx6_pcie_configure_type(struct imx6_pcie *imx6_pcie)
 {
-	unsigned int mask, val, mode;
+	const struct imx6_pcie_drvdata *drvdata = imx6_pcie->drvdata;
+	unsigned int mask, val, mode, id;
 
-	if (imx6_pcie->drvdata->mode == DW_PCIE_EP_TYPE)
+	if (drvdata->mode == DW_PCIE_EP_TYPE)
 		mode = PCI_EXP_TYPE_ENDPOINT;
 	else
 		mode = PCI_EXP_TYPE_ROOT_PORT;
 
-	switch (imx6_pcie->drvdata->variant) {
-	case IMX8MQ:
-	case IMX8MQ_EP:
-		if (imx6_pcie->controller_id == 1) {
-			mask = IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE;
-			val  = FIELD_PREP(IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE,
-					  mode);
-		} else {
-			mask = IMX6Q_GPR12_DEVICE_TYPE;
-			val  = FIELD_PREP(IMX6Q_GPR12_DEVICE_TYPE, mode);
-		}
-		break;
-	default:
-		mask = IMX6Q_GPR12_DEVICE_TYPE;
-		val  = FIELD_PREP(IMX6Q_GPR12_DEVICE_TYPE, mode);
-		break;
-	}
+	id = imx6_pcie->controller_id;
+
+	/* If mode_mask[id] is zero, means each controller have its individual gpr */
+	if (!drvdata->mode_mask[id])
+		id = 0;
+
+	mask = drvdata->mode_mask[id];
+	val = mode << (ffs(mask) - 1);
 
-	regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, mask, val);
+	regmap_update_bits(imx6_pcie->iomuxc_gpr, drvdata->mode_off[id], mask, val);
 }
 
 static int pcie_phy_poll_ack(struct imx6_pcie *imx6_pcie, bool exp_val)
@@ -320,76 +362,66 @@ static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, u16 data)
 	return 0;
 }
 
-static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie)
+static int imx8mq_pcie_init_phy(struct imx6_pcie *imx6_pcie)
 {
-	switch (imx6_pcie->drvdata->variant) {
-	case IMX8MM:
-	case IMX8MM_EP:
-	case IMX8MP:
-	case IMX8MP_EP:
-		/*
-		 * The PHY initialization had been done in the PHY
-		 * driver, break here directly.
-		 */
-		break;
-	case IMX8MQ:
-	case IMX8MQ_EP:
-		/*
-		 * TODO: Currently this code assumes external
-		 * oscillator is being used
-		 */
+	/* TODO: Currently this code assumes external oscillator is being used */
+	regmap_update_bits(imx6_pcie->iomuxc_gpr,
+			   imx6_pcie_grp_offset(imx6_pcie),
+			   IMX8MQ_GPR_PCIE_REF_USE_PAD,
+			   IMX8MQ_GPR_PCIE_REF_USE_PAD);
+	/*
+	 * Regarding the datasheet, the PCIE_VPH is suggested to be 1.8V. If the PCIE_VPH is
+	 * supplied by 3.3V, the VREG_BYPASS should be cleared to zero.
+	 */
+	if (imx6_pcie->vph && regulator_get_voltage(imx6_pcie->vph) > 3000000)
 		regmap_update_bits(imx6_pcie->iomuxc_gpr,
 				   imx6_pcie_grp_offset(imx6_pcie),
-				   IMX8MQ_GPR_PCIE_REF_USE_PAD,
-				   IMX8MQ_GPR_PCIE_REF_USE_PAD);
-		/*
-		 * Regarding the datasheet, the PCIE_VPH is suggested
-		 * to be 1.8V. If the PCIE_VPH is supplied by 3.3V, the
-		 * VREG_BYPASS should be cleared to zero.
-		 */
-		if (imx6_pcie->vph &&
-		    regulator_get_voltage(imx6_pcie->vph) > 3000000)
-			regmap_update_bits(imx6_pcie->iomuxc_gpr,
-					   imx6_pcie_grp_offset(imx6_pcie),
-					   IMX8MQ_GPR_PCIE_VREG_BYPASS,
-					   0);
-		break;
-	case IMX7D:
-		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
-				   IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, 0);
-		break;
-	case IMX6SX:
-		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
-				   IMX6SX_GPR12_PCIE_RX_EQ_MASK,
-				   IMX6SX_GPR12_PCIE_RX_EQ_2);
-		fallthrough;
-	default:
-		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
+				   IMX8MQ_GPR_PCIE_VREG_BYPASS,
+				   0);
+
+	return 0;
+}
+
+static int imx7d_pcie_init_phy(struct imx6_pcie *imx6_pcie)
+{
+	regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, 0);
+
+	return 0;
+}
+
+static int imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie)
+{
+	regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
 				   IMX6Q_GPR12_PCIE_CTL_2, 0 << 10);
 
-		/* configure constant input signal to the pcie ctrl and phy */
-		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
-				   IMX6Q_GPR12_LOS_LEVEL, 9 << 4);
-
-		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
-				   IMX6Q_GPR8_TX_DEEMPH_GEN1,
-				   imx6_pcie->tx_deemph_gen1 << 0);
-		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
-				   IMX6Q_GPR8_TX_DEEMPH_GEN2_3P5DB,
-				   imx6_pcie->tx_deemph_gen2_3p5db << 6);
-		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
-				   IMX6Q_GPR8_TX_DEEMPH_GEN2_6DB,
-				   imx6_pcie->tx_deemph_gen2_6db << 12);
-		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
-				   IMX6Q_GPR8_TX_SWING_FULL,
-				   imx6_pcie->tx_swing_full << 18);
-		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
-				   IMX6Q_GPR8_TX_SWING_LOW,
-				   imx6_pcie->tx_swing_low << 25);
-		break;
-	}
+	/* configure constant input signal to the pcie ctrl and phy */
+	regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
+			   IMX6Q_GPR12_LOS_LEVEL, 9 << 4);
+
+	regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
+			   IMX6Q_GPR8_TX_DEEMPH_GEN1,
+			   imx6_pcie->tx_deemph_gen1 << 0);
+	regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
+			   IMX6Q_GPR8_TX_DEEMPH_GEN2_3P5DB,
+			   imx6_pcie->tx_deemph_gen2_3p5db << 6);
+	regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
+			   IMX6Q_GPR8_TX_DEEMPH_GEN2_6DB,
+			   imx6_pcie->tx_deemph_gen2_6db << 12);
+	regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
+			   IMX6Q_GPR8_TX_SWING_FULL,
+			   imx6_pcie->tx_swing_full << 18);
+	regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
+			   IMX6Q_GPR8_TX_SWING_LOW,
+			   imx6_pcie->tx_swing_low << 25);
+	return 0;
+}
 
-	imx6_pcie_configure_type(imx6_pcie);
+static int imx6sx_pcie_init_phy(struct imx6_pcie *imx6_pcie)
+{
+	regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
+			   IMX6SX_GPR12_PCIE_RX_EQ_MASK, IMX6SX_GPR12_PCIE_RX_EQ_2);
+
+	return imx6_pcie_init_phy(imx6_pcie);
 }
 
 static void imx7d_pcie_wait_for_phy_pll_lock(struct imx6_pcie *imx6_pcie)
@@ -407,13 +439,18 @@ static void imx7d_pcie_wait_for_phy_pll_lock(struct imx6_pcie *imx6_pcie)
 
 static int imx6_setup_phy_mpll(struct imx6_pcie *imx6_pcie)
 {
-	unsigned long phy_rate = clk_get_rate(imx6_pcie->pcie_phy);
+	unsigned long phy_rate = 0;
 	int mult, div;
 	u16 val;
+	int i;
 
 	if (!(imx6_pcie->drvdata->flags & IMX6_PCIE_FLAG_IMX6_PHY))
 		return 0;
 
+	for (i = 0; i < imx6_pcie->drvdata->clks_cnt; i++)
+		if (strncmp(imx6_pcie->clks[i].id, "pcie_phy", 8) == 0)
+			phy_rate = clk_get_rate(imx6_pcie->clks[i].clk);
+
 	switch (phy_rate) {
 	case 125000000:
 		/*
@@ -550,19 +587,11 @@ static int imx6_pcie_attach_pd(struct device *dev)
 
 static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
 {
-	struct dw_pcie *pci = imx6_pcie->pci;
-	struct device *dev = pci->dev;
 	unsigned int offset;
 	int ret = 0;
 
 	switch (imx6_pcie->drvdata->variant) {
 	case IMX6SX:
-		ret = clk_prepare_enable(imx6_pcie->pcie_inbound_axi);
-		if (ret) {
-			dev_err(dev, "unable to enable pcie_axi clock\n");
-			break;
-		}
-
 		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
 				   IMX6SX_GPR12_PCIE_TEST_POWERDOWN, 0);
 		break;
@@ -582,6 +611,8 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
 				   IMX6Q_GPR1_PCIE_REF_CLK_EN, 1 << 16);
 		break;
 	case IMX7D:
+	case IMX95:
+	case IMX95_EP:
 		break;
 	case IMX8MM:
 	case IMX8MM_EP:
@@ -589,12 +620,6 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
 	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");
-			break;
-		}
-
 		offset = imx6_pcie_grp_offset(imx6_pcie);
 		/*
 		 * Set the over ride low and enabled
@@ -615,9 +640,6 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
 static void imx6_pcie_disable_ref_clk(struct imx6_pcie *imx6_pcie)
 {
 	switch (imx6_pcie->drvdata->variant) {
-	case IMX6SX:
-		clk_disable_unprepare(imx6_pcie->pcie_inbound_axi);
-		break;
 	case IMX6QP:
 	case IMX6Q:
 		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1,
@@ -631,14 +653,6 @@ static void imx6_pcie_disable_ref_clk(struct imx6_pcie *imx6_pcie)
 				   IMX7D_GPR12_PCIE_PHY_REFCLK_SEL,
 				   IMX7D_GPR12_PCIE_PHY_REFCLK_SEL);
 		break;
-	case IMX8MM:
-	case IMX8MM_EP:
-	case IMX8MQ:
-	case IMX8MQ_EP:
-	case IMX8MP:
-	case IMX8MP_EP:
-		clk_disable_unprepare(imx6_pcie->pcie_aux);
-		break;
 	default:
 		break;
 	}
@@ -650,23 +664,9 @@ static int imx6_pcie_clk_enable(struct imx6_pcie *imx6_pcie)
 	struct device *dev = pci->dev;
 	int ret;
 
-	ret = clk_prepare_enable(imx6_pcie->pcie_phy);
-	if (ret) {
-		dev_err(dev, "unable to enable pcie_phy clock\n");
+	ret = clk_bulk_prepare_enable(imx6_pcie->drvdata->clks_cnt, imx6_pcie->clks);
+	if (ret)
 		return ret;
-	}
-
-	ret = clk_prepare_enable(imx6_pcie->pcie_bus);
-	if (ret) {
-		dev_err(dev, "unable to enable pcie_bus clock\n");
-		goto err_pcie_bus;
-	}
-
-	ret = clk_prepare_enable(imx6_pcie->pcie);
-	if (ret) {
-		dev_err(dev, "unable to enable pcie clock\n");
-		goto err_pcie;
-	}
 
 	ret = imx6_pcie_enable_ref_clk(imx6_pcie);
 	if (ret) {
@@ -679,11 +679,7 @@ static int imx6_pcie_clk_enable(struct imx6_pcie *imx6_pcie)
 	return 0;
 
 err_ref_clk:
-	clk_disable_unprepare(imx6_pcie->pcie);
-err_pcie:
-	clk_disable_unprepare(imx6_pcie->pcie_bus);
-err_pcie_bus:
-	clk_disable_unprepare(imx6_pcie->pcie_phy);
+	clk_bulk_disable_unprepare(imx6_pcie->drvdata->clks_cnt, imx6_pcie->clks);
 
 	return ret;
 }
@@ -691,25 +687,15 @@ err_pcie_bus:
 static void imx6_pcie_clk_disable(struct imx6_pcie *imx6_pcie)
 {
 	imx6_pcie_disable_ref_clk(imx6_pcie);
-	clk_disable_unprepare(imx6_pcie->pcie);
-	clk_disable_unprepare(imx6_pcie->pcie_bus);
-	clk_disable_unprepare(imx6_pcie->pcie_phy);
+	clk_bulk_disable_unprepare(imx6_pcie->drvdata->clks_cnt, imx6_pcie->clks);
 }
 
 static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
 {
+	reset_control_assert(imx6_pcie->pciephy_reset);
+	reset_control_assert(imx6_pcie->apps_reset);
+
 	switch (imx6_pcie->drvdata->variant) {
-	case IMX7D:
-	case IMX8MQ:
-	case IMX8MQ_EP:
-		reset_control_assert(imx6_pcie->pciephy_reset);
-		fallthrough;
-	case IMX8MM:
-	case IMX8MM_EP:
-	case IMX8MP:
-	case IMX8MP_EP:
-		reset_control_assert(imx6_pcie->apps_reset);
-		break;
 	case IMX6SX:
 		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
 				   IMX6SX_GPR12_PCIE_TEST_POWERDOWN,
@@ -730,6 +716,8 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
 		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1,
 				   IMX6Q_GPR1_PCIE_REF_CLK_EN, 0 << 16);
 		break;
+	default:
+		break;
 	}
 
 	/* Some boards don't have PCIe reset GPIO. */
@@ -743,14 +731,10 @@ static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
 	struct dw_pcie *pci = imx6_pcie->pci;
 	struct device *dev = pci->dev;
 
+	reset_control_deassert(imx6_pcie->pciephy_reset);
+
 	switch (imx6_pcie->drvdata->variant) {
-	case IMX8MQ:
-	case IMX8MQ_EP:
-		reset_control_deassert(imx6_pcie->pciephy_reset);
-		break;
 	case IMX7D:
-		reset_control_deassert(imx6_pcie->pciephy_reset);
-
 		/* Workaround for ERR010728, failure of PCI-e PLL VCO to
 		 * oscillate, especially when cold.  This turns off "Duty-cycle
 		 * Corrector" and other mysterious undocumented things.
@@ -782,11 +766,7 @@ static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
 
 		usleep_range(200, 500);
 		break;
-	case IMX6Q:		/* Nothing to do */
-	case IMX8MM:
-	case IMX8MM_EP:
-	case IMX8MP:
-	case IMX8MP_EP:
+	default:
 		break;
 	}
 
@@ -824,48 +804,25 @@ static int imx6_pcie_wait_for_speed_change(struct imx6_pcie *imx6_pcie)
 static void imx6_pcie_ltssm_enable(struct device *dev)
 {
 	struct imx6_pcie *imx6_pcie = dev_get_drvdata(dev);
+	const struct imx6_pcie_drvdata *drvdata = imx6_pcie->drvdata;
 
-	switch (imx6_pcie->drvdata->variant) {
-	case IMX6Q:
-	case IMX6SX:
-	case IMX6QP:
-		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
-				   IMX6Q_GPR12_PCIE_CTL_2,
-				   IMX6Q_GPR12_PCIE_CTL_2);
-		break;
-	case IMX7D:
-	case IMX8MQ:
-	case IMX8MQ_EP:
-	case IMX8MM:
-	case IMX8MM_EP:
-	case IMX8MP:
-	case IMX8MP_EP:
-		reset_control_deassert(imx6_pcie->apps_reset);
-		break;
-	}
+	if (drvdata->ltssm_mask)
+		regmap_update_bits(imx6_pcie->iomuxc_gpr, drvdata->ltssm_off, drvdata->ltssm_mask,
+				   drvdata->ltssm_mask);
+
+	reset_control_deassert(imx6_pcie->apps_reset);
 }
 
 static void imx6_pcie_ltssm_disable(struct device *dev)
 {
 	struct imx6_pcie *imx6_pcie = dev_get_drvdata(dev);
+	const struct imx6_pcie_drvdata *drvdata = imx6_pcie->drvdata;
 
-	switch (imx6_pcie->drvdata->variant) {
-	case IMX6Q:
-	case IMX6SX:
-	case IMX6QP:
-		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
-				   IMX6Q_GPR12_PCIE_CTL_2, 0);
-		break;
-	case IMX7D:
-	case IMX8MQ:
-	case IMX8MQ_EP:
-	case IMX8MM:
-	case IMX8MM_EP:
-	case IMX8MP:
-	case IMX8MP_EP:
-		reset_control_assert(imx6_pcie->apps_reset);
-		break;
-	}
+	if (drvdata->ltssm_mask)
+		regmap_update_bits(imx6_pcie->iomuxc_gpr, drvdata->ltssm_off,
+				   drvdata->ltssm_mask, 0);
+
+	reset_control_assert(imx6_pcie->apps_reset);
 }
 
 static int imx6_pcie_start_link(struct dw_pcie *pci)
@@ -977,7 +934,11 @@ static int imx6_pcie_host_init(struct dw_pcie_rp *pp)
 	}
 
 	imx6_pcie_assert_core_reset(imx6_pcie);
-	imx6_pcie_init_phy(imx6_pcie);
+
+	if (imx6_pcie->drvdata->init_phy)
+		imx6_pcie->drvdata->init_phy(imx6_pcie);
+
+	imx6_pcie_configure_type(imx6_pcie);
 
 	ret = imx6_pcie_clk_enable(imx6_pcie);
 	if (ret) {
@@ -1081,14 +1042,35 @@ static const struct pci_epc_features imx8m_pcie_epc_features = {
 	.linkup_notifier = false,
 	.msi_capable = true,
 	.msix_capable = false,
-	.reserved_bar = 1 << BAR_1 | 1 << BAR_3,
+	.bar[BAR_1] = { .type = BAR_RESERVED, },
+	.bar[BAR_3] = { .type = BAR_RESERVED, },
 	.align = SZ_64K,
 };
 
+/*
+ * BAR#	| Default BAR enable	| Default BAR Type	| Default BAR Size	| BAR Sizing Scheme
+ * ================================================================================================
+ * BAR0	| Enable		| 64-bit		| 1 MB			| Programmable Size
+ * BAR1	| Disable		| 32-bit		| 64 KB			| Fixed Size
+ *        BAR1 should be disabled if BAR0 is 64bit.
+ * BAR2	| Enable		| 32-bit		| 1 MB			| Programmable Size
+ * BAR3	| Enable		| 32-bit		| 64 KB			| Programmable Size
+ * BAR4	| Enable		| 32-bit		| 1M			| Programmable Size
+ * BAR5	| Enable		| 32-bit		| 64 KB			| Programmable Size
+ */
+static const struct pci_epc_features imx95_pcie_epc_features = {
+	.msi_capable = true,
+	.bar[BAR_1] = { .type = BAR_FIXED, .fixed_size = SZ_64K, },
+	.align = SZ_4K,
+};
+
 static const struct pci_epc_features*
 imx6_pcie_ep_get_features(struct dw_pcie_ep *ep)
 {
-	return &imx8m_pcie_epc_features;
+	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+	struct imx6_pcie *imx6_pcie = to_imx6_pcie(pci);
+
+	return imx6_pcie->drvdata->epc_features;
 }
 
 static const struct dw_pcie_ep_ops pcie_ep_ops = {
@@ -1103,7 +1085,6 @@ static int imx6_add_pcie_ep(struct imx6_pcie *imx6_pcie,
 	int ret;
 	unsigned int pcie_dbi2_offset;
 	struct dw_pcie_ep *ep;
-	struct resource *res;
 	struct dw_pcie *pci = imx6_pcie->pci;
 	struct dw_pcie_rp *pp = &pci->pp;
 	struct device *dev = pci->dev;
@@ -1122,14 +1103,20 @@ static int imx6_add_pcie_ep(struct imx6_pcie *imx6_pcie,
 		pcie_dbi2_offset = SZ_4K;
 		break;
 	}
+
 	pci->dbi_base2 = pci->dbi_base + pcie_dbi2_offset;
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
-	if (!res)
-		return -EINVAL;
 
-	ep->phys_base = res->start;
-	ep->addr_size = resource_size(res);
-	ep->page_size = SZ_64K;
+	/*
+	 * FIXME: Ideally, dbi2 base address should come from DT. But since only IMX95 is defining
+	 * "dbi2" in DT, "dbi_base2" is set to NULL here for that platform alone so that the DWC
+	 * core code can fetch that from DT. But once all platform DTs were fixed, this and the
+	 * above "dbi_base2" setting should be removed.
+	 */
+	if (device_property_match_string(dev, "reg-names", "dbi2") >= 0)
+		pci->dbi_base2 = NULL;
+
+	if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_SUPPORT_64BIT))
+		dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
 
 	ret = dw_pcie_ep_init(ep);
 	if (ret) {
@@ -1251,6 +1238,7 @@ static int imx6_pcie_probe(struct platform_device *pdev)
 	struct device_node *node = dev->of_node;
 	int ret;
 	u16 val;
+	int i;
 
 	imx6_pcie = devm_kzalloc(dev, sizeof(*imx6_pcie), GFP_KERNEL);
 	if (!imx6_pcie)
@@ -1304,81 +1292,48 @@ static int imx6_pcie_probe(struct platform_device *pdev)
 		return imx6_pcie->reset_gpio;
 	}
 
-	/* Fetch clocks */
-	imx6_pcie->pcie_bus = devm_clk_get(dev, "pcie_bus");
-	if (IS_ERR(imx6_pcie->pcie_bus))
-		return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_bus),
-				     "pcie_bus clock source missing or invalid\n");
+	if (imx6_pcie->drvdata->clks_cnt >= IMX6_PCIE_MAX_CLKS)
+		return dev_err_probe(dev, -ENOMEM, "clks_cnt is too big\n");
 
-	imx6_pcie->pcie = devm_clk_get(dev, "pcie");
-	if (IS_ERR(imx6_pcie->pcie))
-		return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie),
-				     "pcie clock source missing or invalid\n");
+	for (i = 0; i < imx6_pcie->drvdata->clks_cnt; i++)
+		imx6_pcie->clks[i].id = imx6_pcie->drvdata->clk_names[i];
 
-	switch (imx6_pcie->drvdata->variant) {
-	case IMX6SX:
-		imx6_pcie->pcie_inbound_axi = devm_clk_get(dev,
-							   "pcie_inbound_axi");
-		if (IS_ERR(imx6_pcie->pcie_inbound_axi))
-			return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_inbound_axi),
-					     "pcie_inbound_axi clock missing or invalid\n");
-		break;
-	case IMX8MQ:
-	case IMX8MQ_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),
-					     "pcie_aux clock source missing or invalid\n");
-		fallthrough;
-	case IMX7D:
-		if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR)
-			imx6_pcie->controller_id = 1;
+	/* Fetch clocks */
+	ret = devm_clk_bulk_get(dev, imx6_pcie->drvdata->clks_cnt, imx6_pcie->clks);
+	if (ret)
+		return ret;
 
-		imx6_pcie->pciephy_reset = devm_reset_control_get_exclusive(dev,
-									    "pciephy");
-		if (IS_ERR(imx6_pcie->pciephy_reset)) {
-			dev_err(dev, "Failed to get PCIEPHY reset control\n");
-			return PTR_ERR(imx6_pcie->pciephy_reset);
-		}
+	if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_HAS_PHYDRV)) {
+		imx6_pcie->phy = devm_phy_get(dev, "pcie-phy");
+		if (IS_ERR(imx6_pcie->phy))
+			return dev_err_probe(dev, PTR_ERR(imx6_pcie->phy),
+					     "failed to get pcie phy\n");
+	}
 
-		imx6_pcie->apps_reset = devm_reset_control_get_exclusive(dev,
-									 "apps");
-		if (IS_ERR(imx6_pcie->apps_reset)) {
-			dev_err(dev, "Failed to get PCIE APPS reset control\n");
-			return PTR_ERR(imx6_pcie->apps_reset);
-		}
-		break;
-	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),
-					     "pcie_aux clock source missing or invalid\n");
-		imx6_pcie->apps_reset = devm_reset_control_get_exclusive(dev,
-									 "apps");
+	if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_HAS_APP_RESET)) {
+		imx6_pcie->apps_reset = devm_reset_control_get_exclusive(dev, "apps");
 		if (IS_ERR(imx6_pcie->apps_reset))
 			return dev_err_probe(dev, PTR_ERR(imx6_pcie->apps_reset),
 					     "failed to get pcie apps reset control\n");
+	}
 
-		imx6_pcie->phy = devm_phy_get(dev, "pcie-phy");
-		if (IS_ERR(imx6_pcie->phy))
-			return dev_err_probe(dev, PTR_ERR(imx6_pcie->phy),
-					     "failed to get pcie phy\n");
+	if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_HAS_PHY_RESET)) {
+		imx6_pcie->pciephy_reset = devm_reset_control_get_exclusive(dev, "pciephy");
+		if (IS_ERR(imx6_pcie->pciephy_reset))
+			return dev_err_probe(dev, PTR_ERR(imx6_pcie->pciephy_reset),
+					     "Failed to get PCIEPHY reset control\n");
+	}
 
+	switch (imx6_pcie->drvdata->variant) {
+	case IMX8MQ:
+	case IMX8MQ_EP:
+	case IMX7D:
+		if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR)
+			imx6_pcie->controller_id = 1;
 		break;
 	default:
 		break;
 	}
-	/* Don't fetch the pcie_phy clock, if it has abstract PHY driver */
-	if (imx6_pcie->phy == NULL) {
-		imx6_pcie->pcie_phy = devm_clk_get(dev, "pcie_phy");
-		if (IS_ERR(imx6_pcie->pcie_phy))
-			return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_phy),
-					     "pcie_phy clock source missing or invalid\n");
-	}
-
 
 	/* Grab turnoff reset */
 	imx6_pcie->turnoff_reset = devm_reset_control_get_optional_exclusive(dev, "turnoff");
@@ -1387,12 +1342,32 @@ static int imx6_pcie_probe(struct platform_device *pdev)
 		return PTR_ERR(imx6_pcie->turnoff_reset);
 	}
 
+	if (imx6_pcie->drvdata->gpr) {
 	/* Grab GPR config register range */
-	imx6_pcie->iomuxc_gpr =
-		 syscon_regmap_lookup_by_compatible(imx6_pcie->drvdata->gpr);
-	if (IS_ERR(imx6_pcie->iomuxc_gpr)) {
-		dev_err(dev, "unable to find iomuxc registers\n");
-		return PTR_ERR(imx6_pcie->iomuxc_gpr);
+		imx6_pcie->iomuxc_gpr =
+			 syscon_regmap_lookup_by_compatible(imx6_pcie->drvdata->gpr);
+		if (IS_ERR(imx6_pcie->iomuxc_gpr))
+			return dev_err_probe(dev, PTR_ERR(imx6_pcie->iomuxc_gpr),
+					     "unable to find iomuxc registers\n");
+	}
+
+	if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_HAS_SERDES)) {
+		void __iomem *off = devm_platform_ioremap_resource_byname(pdev, "app");
+
+		if (IS_ERR(off))
+			return dev_err_probe(dev, PTR_ERR(off),
+					     "unable to find serdes registers\n");
+
+		static const struct regmap_config regmap_config = {
+			.reg_bits = 32,
+			.val_bits = 32,
+			.reg_stride = 4,
+		};
+
+		imx6_pcie->iomuxc_gpr = devm_regmap_init_mmio(dev, off, &regmap_config);
+		if (IS_ERR(imx6_pcie->iomuxc_gpr))
+			return dev_err_probe(dev, PTR_ERR(imx6_pcie->iomuxc_gpr),
+					     "unable to find iomuxc registers\n");
 	}
 
 	/* Grab PCIe PHY Tx Settings */
@@ -1469,6 +1444,11 @@ static void imx6_pcie_shutdown(struct platform_device *pdev)
 	imx6_pcie_assert_core_reset(imx6_pcie);
 }
 
+static const char * const imx6q_clks[] = {"pcie_bus", "pcie", "pcie_phy"};
+static const char * const imx8mm_clks[] = {"pcie_bus", "pcie", "pcie_aux"};
+static const char * const imx8mq_clks[] = {"pcie_bus", "pcie", "pcie_phy", "pcie_aux"};
+static const char * const imx6sx_clks[] = {"pcie_bus", "pcie", "pcie_phy", "pcie_inbound_axi"};
+
 static const struct imx6_pcie_drvdata drvdata[] = {
 	[IMX6Q] = {
 		.variant = IMX6Q,
@@ -1476,6 +1456,13 @@ static const struct imx6_pcie_drvdata drvdata[] = {
 			 IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE,
 		.dbi_length = 0x200,
 		.gpr = "fsl,imx6q-iomuxc-gpr",
+		.clk_names = imx6q_clks,
+		.clks_cnt = ARRAY_SIZE(imx6q_clks),
+		.ltssm_off = IOMUXC_GPR12,
+		.ltssm_mask = IMX6Q_GPR12_PCIE_CTL_2,
+		.mode_off[0] = IOMUXC_GPR12,
+		.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
+		.init_phy = imx6_pcie_init_phy,
 	},
 	[IMX6SX] = {
 		.variant = IMX6SX,
@@ -1483,6 +1470,13 @@ static const struct imx6_pcie_drvdata drvdata[] = {
 			 IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE |
 			 IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
 		.gpr = "fsl,imx6q-iomuxc-gpr",
+		.clk_names = imx6sx_clks,
+		.clks_cnt = ARRAY_SIZE(imx6sx_clks),
+		.ltssm_off = IOMUXC_GPR12,
+		.ltssm_mask = IMX6Q_GPR12_PCIE_CTL_2,
+		.mode_off[0] = IOMUXC_GPR12,
+		.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
+		.init_phy = imx6sx_pcie_init_phy,
 	},
 	[IMX6QP] = {
 		.variant = IMX6QP,
@@ -1491,40 +1485,122 @@ static const struct imx6_pcie_drvdata drvdata[] = {
 			 IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
 		.dbi_length = 0x200,
 		.gpr = "fsl,imx6q-iomuxc-gpr",
+		.clk_names = imx6q_clks,
+		.clks_cnt = ARRAY_SIZE(imx6q_clks),
+		.ltssm_off = IOMUXC_GPR12,
+		.ltssm_mask = IMX6Q_GPR12_PCIE_CTL_2,
+		.mode_off[0] = IOMUXC_GPR12,
+		.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
+		.init_phy = imx6_pcie_init_phy,
 	},
 	[IMX7D] = {
 		.variant = IMX7D,
-		.flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
+		.flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND |
+			 IMX6_PCIE_FLAG_HAS_APP_RESET |
+			 IMX6_PCIE_FLAG_HAS_PHY_RESET,
 		.gpr = "fsl,imx7d-iomuxc-gpr",
+		.clk_names = imx6q_clks,
+		.clks_cnt = ARRAY_SIZE(imx6q_clks),
+		.mode_off[0] = IOMUXC_GPR12,
+		.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
+		.init_phy = imx7d_pcie_init_phy,
 	},
 	[IMX8MQ] = {
 		.variant = IMX8MQ,
+		.flags = IMX6_PCIE_FLAG_HAS_APP_RESET |
+			 IMX6_PCIE_FLAG_HAS_PHY_RESET,
 		.gpr = "fsl,imx8mq-iomuxc-gpr",
+		.clk_names = imx8mq_clks,
+		.clks_cnt = ARRAY_SIZE(imx8mq_clks),
+		.mode_off[0] = IOMUXC_GPR12,
+		.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
+		.mode_off[1] = IOMUXC_GPR12,
+		.mode_mask[1] = IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE,
+		.init_phy = imx8mq_pcie_init_phy,
 	},
 	[IMX8MM] = {
 		.variant = IMX8MM,
-		.flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
+		.flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND |
+			 IMX6_PCIE_FLAG_HAS_PHYDRV |
+			 IMX6_PCIE_FLAG_HAS_APP_RESET,
 		.gpr = "fsl,imx8mm-iomuxc-gpr",
+		.clk_names = imx8mm_clks,
+		.clks_cnt = ARRAY_SIZE(imx8mm_clks),
+		.mode_off[0] = IOMUXC_GPR12,
+		.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
 	},
 	[IMX8MP] = {
 		.variant = IMX8MP,
-		.flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
+		.flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND |
+			 IMX6_PCIE_FLAG_HAS_PHYDRV |
+			 IMX6_PCIE_FLAG_HAS_APP_RESET,
 		.gpr = "fsl,imx8mp-iomuxc-gpr",
+		.clk_names = imx8mm_clks,
+		.clks_cnt = ARRAY_SIZE(imx8mm_clks),
+		.mode_off[0] = IOMUXC_GPR12,
+		.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
+	},
+	[IMX95] = {
+		.variant = IMX95,
+		.flags = IMX6_PCIE_FLAG_HAS_SERDES,
+		.clk_names = imx8mq_clks,
+		.clks_cnt = ARRAY_SIZE(imx8mq_clks),
+		.ltssm_off = IMX95_PE0_GEN_CTRL_3,
+		.ltssm_mask = IMX95_PCIE_LTSSM_EN,
+		.mode_off[0]  = IMX95_PE0_GEN_CTRL_1,
+		.mode_mask[0] = IMX95_PCIE_DEVICE_TYPE,
+		.init_phy = imx95_pcie_init_phy,
 	},
 	[IMX8MQ_EP] = {
 		.variant = IMX8MQ_EP,
+		.flags = IMX6_PCIE_FLAG_HAS_APP_RESET |
+			 IMX6_PCIE_FLAG_HAS_PHY_RESET,
 		.mode = DW_PCIE_EP_TYPE,
 		.gpr = "fsl,imx8mq-iomuxc-gpr",
+		.clk_names = imx8mq_clks,
+		.clks_cnt = ARRAY_SIZE(imx8mq_clks),
+		.mode_off[0] = IOMUXC_GPR12,
+		.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
+		.mode_off[1] = IOMUXC_GPR12,
+		.mode_mask[1] = IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE,
+		.epc_features = &imx8m_pcie_epc_features,
+		.init_phy = imx8mq_pcie_init_phy,
 	},
 	[IMX8MM_EP] = {
 		.variant = IMX8MM_EP,
+		.flags = IMX6_PCIE_FLAG_HAS_PHYDRV,
 		.mode = DW_PCIE_EP_TYPE,
 		.gpr = "fsl,imx8mm-iomuxc-gpr",
+		.clk_names = imx8mm_clks,
+		.clks_cnt = ARRAY_SIZE(imx8mm_clks),
+		.mode_off[0] = IOMUXC_GPR12,
+		.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
+		.epc_features = &imx8m_pcie_epc_features,
 	},
 	[IMX8MP_EP] = {
 		.variant = IMX8MP_EP,
+		.flags = IMX6_PCIE_FLAG_HAS_PHYDRV,
 		.mode = DW_PCIE_EP_TYPE,
 		.gpr = "fsl,imx8mp-iomuxc-gpr",
+		.clk_names = imx8mm_clks,
+		.clks_cnt = ARRAY_SIZE(imx8mm_clks),
+		.mode_off[0] = IOMUXC_GPR12,
+		.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
+		.epc_features = &imx8m_pcie_epc_features,
+	},
+	[IMX95_EP] = {
+		.variant = IMX95_EP,
+		.flags = IMX6_PCIE_FLAG_HAS_SERDES |
+			 IMX6_PCIE_FLAG_SUPPORT_64BIT,
+		.clk_names = imx8mq_clks,
+		.clks_cnt = ARRAY_SIZE(imx8mq_clks),
+		.ltssm_off = IMX95_PE0_GEN_CTRL_3,
+		.ltssm_mask = IMX95_PCIE_LTSSM_EN,
+		.mode_off[0]  = IMX95_PE0_GEN_CTRL_1,
+		.mode_mask[0] = IMX95_PCIE_DEVICE_TYPE,
+		.init_phy = imx95_pcie_init_phy,
+		.epc_features = &imx95_pcie_epc_features,
+		.mode = DW_PCIE_EP_TYPE,
 	},
 };
 
@@ -1536,9 +1612,11 @@ static const struct of_device_id imx6_pcie_of_match[] = {
 	{ .compatible = "fsl,imx8mq-pcie", .data = &drvdata[IMX8MQ], },
 	{ .compatible = "fsl,imx8mm-pcie", .data = &drvdata[IMX8MM], },
 	{ .compatible = "fsl,imx8mp-pcie", .data = &drvdata[IMX8MP], },
+	{ .compatible = "fsl,imx95-pcie", .data = &drvdata[IMX95], },
 	{ .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], },
+	{ .compatible = "fsl,imx95-pcie-ep", .data = &drvdata[IMX95_EP], },
 	{},
 };
 
diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index c0c62533a3..844de44187 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -924,12 +924,12 @@ static const struct pci_epc_features ks_pcie_am654_epc_features = {
 	.linkup_notifier = false,
 	.msi_capable = true,
 	.msix_capable = true,
-	.reserved_bar = 1 << BAR_0 | 1 << BAR_1,
-	.bar_fixed_64bit = 1 << BAR_0,
-	.bar_fixed_size[2] = SZ_1M,
-	.bar_fixed_size[3] = SZ_64K,
-	.bar_fixed_size[4] = 256,
-	.bar_fixed_size[5] = SZ_1M,
+	.bar[BAR_0] = { .type = BAR_RESERVED, },
+	.bar[BAR_1] = { .type = BAR_RESERVED, },
+	.bar[BAR_2] = { .type = BAR_FIXED, .fixed_size = SZ_1M, },
+	.bar[BAR_3] = { .type = BAR_FIXED, .fixed_size = SZ_64K, },
+	.bar[BAR_4] = { .type = BAR_FIXED, .fixed_size = 256, },
+	.bar[BAR_5] = { .type = BAR_FIXED, .fixed_size = SZ_1M, },
 	.align = SZ_1M,
 };
 
diff --git a/drivers/pci/controller/dwc/pci-layerscape-ep.c b/drivers/pci/controller/dwc/pci-layerscape-ep.c
index 2e398494e7..1f6ee1460e 100644
--- a/drivers/pci/controller/dwc/pci-layerscape-ep.c
+++ b/drivers/pci/controller/dwc/pci-layerscape-ep.c
@@ -250,7 +250,10 @@ static int __init ls_pcie_ep_probe(struct platform_device *pdev)
 	pci->dev = dev;
 	pci->ops = pcie->drvdata->dw_pcie_ops;
 
-	ls_epc->bar_fixed_64bit = (1 << BAR_2) | (1 << BAR_4);
+	ls_epc->bar[BAR_2].only_64bit = true;
+	ls_epc->bar[BAR_3].type = BAR_RESERVED;
+	ls_epc->bar[BAR_4].only_64bit = true;
+	ls_epc->bar[BAR_5].type = BAR_RESERVED;
 	ls_epc->linkup_notifier = true;
 
 	pcie->pci = pci;
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index 746a11dcb6..c43a1479de 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -604,11 +604,16 @@ static unsigned int dw_pcie_ep_find_ext_capability(struct dw_pcie *pci, int cap)
 int dw_pcie_ep_init_complete(struct dw_pcie_ep *ep)
 {
 	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+	struct dw_pcie_ep_func *ep_func;
+	struct device *dev = pci->dev;
+	struct pci_epc *epc = ep->epc;
 	unsigned int offset, ptm_cap_base;
 	unsigned int nbars;
 	u8 hdr_type;
+	u8 func_no;
+	int i, ret;
+	void *addr;
 	u32 reg;
-	int i;
 
 	hdr_type = dw_pcie_readb_dbi(pci, PCI_HEADER_TYPE) &
 		   PCI_HEADER_TYPE_MASK;
@@ -619,6 +624,58 @@ int dw_pcie_ep_init_complete(struct dw_pcie_ep *ep)
 		return -EIO;
 	}
 
+	dw_pcie_version_detect(pci);
+
+	dw_pcie_iatu_detect(pci);
+
+	ret = dw_pcie_edma_detect(pci);
+	if (ret)
+		return ret;
+
+	if (!ep->ib_window_map) {
+		ep->ib_window_map = devm_bitmap_zalloc(dev, pci->num_ib_windows,
+						       GFP_KERNEL);
+		if (!ep->ib_window_map)
+			goto err_remove_edma;
+	}
+
+	if (!ep->ob_window_map) {
+		ep->ob_window_map = devm_bitmap_zalloc(dev, pci->num_ob_windows,
+						       GFP_KERNEL);
+		if (!ep->ob_window_map)
+			goto err_remove_edma;
+	}
+
+	if (!ep->outbound_addr) {
+		addr = devm_kcalloc(dev, pci->num_ob_windows, sizeof(phys_addr_t),
+				    GFP_KERNEL);
+		if (!addr)
+			goto err_remove_edma;
+		ep->outbound_addr = addr;
+	}
+
+	for (func_no = 0; func_no < epc->max_functions; func_no++) {
+
+		ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no);
+		if (ep_func)
+			continue;
+
+		ep_func = devm_kzalloc(dev, sizeof(*ep_func), GFP_KERNEL);
+		if (!ep_func)
+			goto err_remove_edma;
+
+		ep_func->func_no = func_no;
+		ep_func->msi_cap = dw_pcie_ep_find_capability(ep, func_no,
+							      PCI_CAP_ID_MSI);
+		ep_func->msix_cap = dw_pcie_ep_find_capability(ep, func_no,
+							       PCI_CAP_ID_MSIX);
+
+		list_add_tail(&ep_func->list, &ep->func_list);
+	}
+
+	if (ep->ops->init)
+		ep->ops->init(ep);
+
 	offset = dw_pcie_ep_find_ext_capability(pci, PCI_EXT_CAP_ID_REBAR);
 	ptm_cap_base = dw_pcie_ep_find_ext_capability(pci, PCI_EXT_CAP_ID_PTM);
 
@@ -658,14 +715,17 @@ int dw_pcie_ep_init_complete(struct dw_pcie_ep *ep)
 	dw_pcie_dbi_ro_wr_dis(pci);
 
 	return 0;
+
+err_remove_edma:
+	dw_pcie_edma_remove(pci);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(dw_pcie_ep_init_complete);
 
 int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 {
 	int ret;
-	void *addr;
-	u8 func_no;
 	struct resource *res;
 	struct pci_epc *epc;
 	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
@@ -673,7 +733,6 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 	struct platform_device *pdev = to_platform_device(dev);
 	struct device_node *np = dev->of_node;
 	const struct pci_epc_features *epc_features;
-	struct dw_pcie_ep_func *ep_func;
 
 	INIT_LIST_HEAD(&ep->func_list);
 
@@ -691,26 +750,6 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 	if (ep->ops->pre_init)
 		ep->ops->pre_init(ep);
 
-	dw_pcie_version_detect(pci);
-
-	dw_pcie_iatu_detect(pci);
-
-	ep->ib_window_map = devm_bitmap_zalloc(dev, pci->num_ib_windows,
-					       GFP_KERNEL);
-	if (!ep->ib_window_map)
-		return -ENOMEM;
-
-	ep->ob_window_map = devm_bitmap_zalloc(dev, pci->num_ob_windows,
-					       GFP_KERNEL);
-	if (!ep->ob_window_map)
-		return -ENOMEM;
-
-	addr = devm_kcalloc(dev, pci->num_ob_windows, sizeof(phys_addr_t),
-			    GFP_KERNEL);
-	if (!addr)
-		return -ENOMEM;
-	ep->outbound_addr = addr;
-
 	epc = devm_pci_epc_create(dev, &epc_ops);
 	if (IS_ERR(epc)) {
 		dev_err(dev, "Failed to create epc device\n");
@@ -724,23 +763,6 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 	if (ret < 0)
 		epc->max_functions = 1;
 
-	for (func_no = 0; func_no < epc->max_functions; func_no++) {
-		ep_func = devm_kzalloc(dev, sizeof(*ep_func), GFP_KERNEL);
-		if (!ep_func)
-			return -ENOMEM;
-
-		ep_func->func_no = func_no;
-		ep_func->msi_cap = dw_pcie_ep_find_capability(ep, func_no,
-							      PCI_CAP_ID_MSI);
-		ep_func->msix_cap = dw_pcie_ep_find_capability(ep, func_no,
-							       PCI_CAP_ID_MSIX);
-
-		list_add_tail(&ep_func->list, &ep->func_list);
-	}
-
-	if (ep->ops->init)
-		ep->ops->init(ep);
-
 	ret = pci_epc_mem_init(epc, ep->phys_base, ep->addr_size,
 			       ep->page_size);
 	if (ret < 0) {
@@ -756,25 +778,25 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 		goto err_exit_epc_mem;
 	}
 
-	ret = dw_pcie_edma_detect(pci);
-	if (ret)
-		goto err_free_epc_mem;
-
 	if (ep->ops->get_features) {
 		epc_features = ep->ops->get_features(ep);
 		if (epc_features->core_init_notifier)
 			return 0;
 	}
 
+	/*
+	 * NOTE:- Avoid accessing the hardware (Ex:- DBI space) before this
+	 * step as platforms that implement 'core_init_notifier' feature may
+	 * not have the hardware ready (i.e. core initialized) for access
+	 * (Ex: tegra194). Any hardware access on such platforms result
+	 * in system hang.
+	 */
 	ret = dw_pcie_ep_init_complete(ep);
 	if (ret)
-		goto err_remove_edma;
+		goto err_free_epc_mem;
 
 	return 0;
 
-err_remove_edma:
-	dw_pcie_edma_remove(pci);
-
 err_free_epc_mem:
 	pci_epc_mem_free_addr(epc, ep->msi_mem_phys, ep->msi_mem,
 			      epc->mem->window.page_size);
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index d5fc31f834..d15a5c2d5b 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -328,7 +328,7 @@ static int dw_pcie_msi_host_init(struct dw_pcie_rp *pp)
 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
 	struct device *dev = pci->dev;
 	struct platform_device *pdev = to_platform_device(dev);
-	u64 *msi_vaddr;
+	u64 *msi_vaddr = NULL;
 	int ret;
 	u32 ctrl, num_ctrls;
 
@@ -379,15 +379,20 @@ static int dw_pcie_msi_host_init(struct dw_pcie_rp *pp)
 	 * memory.
 	 */
 	ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
-	if (ret)
-		dev_warn(dev, "Failed to set DMA mask to 32-bit. Devices with only 32-bit MSI support may not work properly\n");
+	if (!ret)
+		msi_vaddr = dmam_alloc_coherent(dev, sizeof(u64), &pp->msi_data,
+						GFP_KERNEL);
 
-	msi_vaddr = dmam_alloc_coherent(dev, sizeof(u64), &pp->msi_data,
-					GFP_KERNEL);
 	if (!msi_vaddr) {
-		dev_err(dev, "Failed to alloc and map MSI data\n");
-		dw_pcie_free_msi(pp);
-		return -ENOMEM;
+		dev_warn(dev, "Failed to allocate 32-bit MSI address\n");
+		dma_set_coherent_mask(dev, DMA_BIT_MASK(64));
+		msi_vaddr = dmam_alloc_coherent(dev, sizeof(u64), &pp->msi_data,
+						GFP_KERNEL);
+		if (!msi_vaddr) {
+			dev_err(dev, "Failed to allocate MSI address\n");
+			dw_pcie_free_msi(pp);
+			return -ENOMEM;
+		}
 	}
 
 	return 0;
diff --git a/drivers/pci/controller/dwc/pcie-keembay.c b/drivers/pci/controller/dwc/pcie-keembay.c
index 208d3b0ba1..5e8e54f597 100644
--- a/drivers/pci/controller/dwc/pcie-keembay.c
+++ b/drivers/pci/controller/dwc/pcie-keembay.c
@@ -312,8 +312,12 @@ static const struct pci_epc_features keembay_pcie_epc_features = {
 	.linkup_notifier	= false,
 	.msi_capable		= true,
 	.msix_capable		= true,
-	.reserved_bar		= BIT(BAR_1) | BIT(BAR_3) | BIT(BAR_5),
-	.bar_fixed_64bit	= BIT(BAR_0) | BIT(BAR_2) | BIT(BAR_4),
+	.bar[BAR_0]		= { .only_64bit = true, },
+	.bar[BAR_1]		= { .type = BAR_RESERVED, },
+	.bar[BAR_2]		= { .only_64bit = true, },
+	.bar[BAR_3]		= { .type = BAR_RESERVED, },
+	.bar[BAR_4]		= { .only_64bit = true, },
+	.bar[BAR_5]		= { .type = BAR_RESERVED, },
 	.align			= SZ_16K,
 };
 
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 23bb0eee5c..14772edcf0 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1679,6 +1679,7 @@ static const struct of_device_id qcom_pcie_match[] = {
 	{ .compatible = "qcom,pcie-sm8450-pcie0", .data = &cfg_1_9_0 },
 	{ .compatible = "qcom,pcie-sm8450-pcie1", .data = &cfg_1_9_0 },
 	{ .compatible = "qcom,pcie-sm8550", .data = &cfg_1_9_0 },
+	{ .compatible = "qcom,pcie-x1e80100", .data = &cfg_1_9_0 },
 	{ }
 };
 
diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4.c b/drivers/pci/controller/dwc/pcie-rcar-gen4.c
index e9166619b1..0be760ed42 100644
--- a/drivers/pci/controller/dwc/pcie-rcar-gen4.c
+++ b/drivers/pci/controller/dwc/pcie-rcar-gen4.c
@@ -383,7 +383,9 @@ static const struct pci_epc_features rcar_gen4_pcie_epc_features = {
 	.linkup_notifier = false,
 	.msi_capable = true,
 	.msix_capable = false,
-	.reserved_bar = 1 << BAR_1 | 1 << BAR_3 | 1 << BAR_5,
+	.bar[BAR_1] = { .type = BAR_RESERVED, },
+	.bar[BAR_3] = { .type = BAR_RESERVED, },
+	.bar[BAR_5] = { .type = BAR_RESERVED, },
 	.align = SZ_1M,
 };
 
diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index 7afa9e9aab..e440c09d1d 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -2007,9 +2007,13 @@ static const struct pci_epc_features tegra_pcie_epc_features = {
 	.core_init_notifier = true,
 	.msi_capable = false,
 	.msix_capable = false,
-	.reserved_bar = 1 << BAR_2 | 1 << BAR_3 | 1 << BAR_4 | 1 << BAR_5,
-	.bar_fixed_64bit = 1 << BAR_0,
-	.bar_fixed_size[0] = SZ_1M,
+	.bar[BAR_0] = { .type = BAR_FIXED, .fixed_size = SZ_1M,
+			.only_64bit = true, },
+	.bar[BAR_1] = { .type = BAR_RESERVED, },
+	.bar[BAR_2] = { .type = BAR_RESERVED, },
+	.bar[BAR_3] = { .type = BAR_RESERVED, },
+	.bar[BAR_4] = { .type = BAR_RESERVED, },
+	.bar[BAR_5] = { .type = BAR_RESERVED, },
 };
 
 static const struct pci_epc_features*
@@ -2269,11 +2273,14 @@ static int tegra_pcie_dw_probe(struct platform_device *pdev)
 		ret = tegra_pcie_config_ep(pcie, pdev);
 		if (ret < 0)
 			goto fail;
+		else
+			return 0;
 		break;
 
 	default:
 		dev_err(dev, "Invalid PCIe device type %d\n",
 			pcie->of_data->mode);
+		ret = -EINVAL;
 	}
 
 fail:
diff --git a/drivers/pci/controller/dwc/pcie-uniphier-ep.c b/drivers/pci/controller/dwc/pcie-uniphier-ep.c
index 3fced0d3e8..639bc2e124 100644
--- a/drivers/pci/controller/dwc/pcie-uniphier-ep.c
+++ b/drivers/pci/controller/dwc/pcie-uniphier-ep.c
@@ -411,8 +411,12 @@ static const struct uniphier_pcie_ep_soc_data uniphier_pro5_data = {
 		.msi_capable = true,
 		.msix_capable = false,
 		.align = 1 << 16,
-		.bar_fixed_64bit = BIT(BAR_0) | BIT(BAR_2) | BIT(BAR_4),
-		.reserved_bar =  BIT(BAR_4),
+		.bar[BAR_0] = { .only_64bit = true, },
+		.bar[BAR_1] = { .type = BAR_RESERVED, },
+		.bar[BAR_2] = { .only_64bit = true, },
+		.bar[BAR_3] = { .type = BAR_RESERVED, },
+		.bar[BAR_4] = { .type = BAR_RESERVED, },
+		.bar[BAR_5] = { .type = BAR_RESERVED, },
 	},
 };
 
@@ -425,7 +429,12 @@ static const struct uniphier_pcie_ep_soc_data uniphier_nx1_data = {
 		.msi_capable = true,
 		.msix_capable = false,
 		.align = 1 << 12,
-		.bar_fixed_64bit = BIT(BAR_0) | BIT(BAR_2) | BIT(BAR_4),
+		.bar[BAR_0] = { .only_64bit = true, },
+		.bar[BAR_1] = { .type = BAR_RESERVED, },
+		.bar[BAR_2] = { .only_64bit = true, },
+		.bar[BAR_3] = { .type = BAR_RESERVED, },
+		.bar[BAR_4] = { .only_64bit = true, },
+		.bar[BAR_5] = { .type = BAR_RESERVED, },
 	},
 };