econet: en7528: add PCIe and WiFi support

Add PCIe controller and PHY support for EN7528 SoC. This includes
a new PCIe PHY driver, EN7528-specific startup in the MediaTek PCIe
controller, and a fix for bogus prefetch window reads on bridges
that do not implement the registers.

Enable WiFi for the DASAN H660GM-A board with MT7603 (2.4 GHz) and
MT7615/MT7663 (5 GHz).

Signed-off-by: Ahmed Naseef <naseefkm@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/21326
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

9 files changed, 532 insertions, 3 deletions

diff --git a/target/linux/econet/dts/en7528.dtsi b/target/linux/econet/dts/en7528.dtsi
index 66d302a739..1ccc298d21 100644
--- a/target/linux/econet/dts/en7528.dtsi
+++ b/target/linux/econet/dts/en7528.dtsi
@@ -57,6 +57,18 @@
 		interrupts = <2>;
 	};
 
+	pcie_phy0: pcie-phy@1faf2000 {
+		compatible = "econet,en7528-pcie-phy0";
+		reg = <0x1faf2000 0x1000>;
+		#phy-cells = <0>;
+	};
+
+	pcie_phy1: pcie-phy@1fac0000 {
+		compatible = "econet,en7528-pcie-phy1";
+		reg = <0x1fac0000 0x1000>;
+		#phy-cells = <0>;
+	};
+
 	gpio0: gpio@1fbf0200 {
 		compatible = "airoha,en7523-gpio";
 		reg = <0x1fbf0204 0x4>,
@@ -131,6 +143,93 @@
 		clock-frequency = <7372800>;
 	};
 
+	pciecfg: pciecfg@1fb80000 {
+		compatible = "mediatek,generic-pciecfg", "syscon";
+		reg = <0x1fb80000 0x1000>;
+	};
+
+	pcie0: pcie@1fb81000 {
+		compatible = "econet,en7528-pcie";
+		device_type = "pci";
+		reg = <0x1fb81000 0x1000>;
+		reg-names = "port0";
+		linux,pci-domain = <0>;
+		#address-cells = <3>;
+		#size-cells = <2>;
+		interrupt-parent = <&gic>;
+		interrupts = <GIC_SHARED 23 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "pcie_irq";
+		clocks = <&scu EN7523_CLK_PCIE>;
+		clock-names = "sys_ck0";
+		phys = <&pcie_phy0>;
+		phy-names = "pcie-phy0";
+		bus-range = <0x00 0xff>;
+		ranges = <0x01000000 0 0x00000000 0x1f600000 0 0x00010000>,
+			 <0x82000000 0 0x20000000 0x20000000 0 0x08000000>;
+		status = "disabled";
+
+		#interrupt-cells = <1>;
+		interrupt-map-mask = <0 0 0 7>;
+		interrupt-map = <0 0 0 1 &pcie_intc0 0>,
+				<0 0 0 2 &pcie_intc0 1>,
+				<0 0 0 3 &pcie_intc0 2>,
+				<0 0 0 4 &pcie_intc0 3>;
+
+		pcie_intc0: interrupt-controller {
+			interrupt-controller;
+			#address-cells = <0>;
+			#interrupt-cells = <1>;
+		};
+
+		slot0: pcie@0,0 {
+			reg = <0x0000 0 0 0 0>;
+			#address-cells = <3>;
+			#size-cells = <2>;
+			ranges;
+		};
+	};
+
+	pcie1: pcie@1fb83000 {
+		compatible = "econet,en7528-pcie";
+		device_type = "pci";
+		reg = <0x1fb83000 0x1000>;
+		reg-names = "port1";
+		linux,pci-domain = <1>;
+		#address-cells = <3>;
+		#size-cells = <2>;
+		interrupt-parent = <&gic>;
+		interrupts = <GIC_SHARED 24 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "pcie_irq";
+		clocks = <&scu EN7523_CLK_PCIE>;
+		clock-names = "sys_ck1";
+		phys = <&pcie_phy1>;
+		phy-names = "pcie-phy1";
+		bus-range = <0x00 0xff>;
+		ranges = <0x01000000 0 0x00000000 0x1f610000 0 0x00010000>,
+			 <0x82000000 0 0x28000000 0x28000000 0 0x08000000>;
+		status = "disabled";
+
+		#interrupt-cells = <1>;
+		interrupt-map-mask = <0 0 0 7>;
+		interrupt-map = <0 0 0 1 &pcie_intc1 0>,
+				<0 0 0 2 &pcie_intc1 1>,
+				<0 0 0 3 &pcie_intc1 2>,
+				<0 0 0 4 &pcie_intc1 3>;
+
+		pcie_intc1: interrupt-controller {
+			interrupt-controller;
+			#address-cells = <0>;
+			#interrupt-cells = <1>;
+		};
+
+		slot1: pcie@1,0 {
+			reg = <0x0800 0 0 0 0>;
+			#address-cells = <3>;
+			#size-cells = <2>;
+			ranges;
+		};
+	};
+
 	ethernet: ethernet@1fb50000 {
 		compatible = "econet,en7528-eth";
 		reg = <0x1fb50000 0x10000>;
diff --git a/target/linux/econet/dts/en7528_dasan_h660gm-a.dts b/target/linux/econet/dts/en7528_dasan_h660gm-a.dts
index 69fd912377..f14c1e29db 100644
--- a/target/linux/econet/dts/en7528_dasan_h660gm-a.dts
+++ b/target/linux/econet/dts/en7528_dasan_h660gm-a.dts
@@ -143,6 +143,38 @@
 	};
 };
 
+&pcie0 {
+	status = "okay";
+};
+
+&pcie1 {
+	status = "okay";
+};
+
+&slot0 {
+	status = "okay";
+
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		nvmem-cells = <&macaddr_dzs 8>, <&eeprom_reservearea_40000>;
+		nvmem-cell-names = "mac-address", "eeprom";
+		ieee80211-freq-limit = <2400000 2500000>;
+	};
+};
+
+&slot1 {
+	status = "okay";
+
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		nvmem-cells = <&macaddr_dzs 9>, <&eeprom_reservearea_1c0000>;
+		nvmem-cell-names = "mac-address", "eeprom";
+		ieee80211-freq-limit = <5000000 6000000>;
+	};
+};
+
 &gmac0 {
 	status = "okay";
 	nvmem-cells = <&macaddr_dzs 7>;
@@ -216,6 +248,19 @@
 		partition@ddc0000 {
 			label = "reservearea";
 			reg = <0xddc0000 0x240000>;
+			nvmem-layout {
+				compatible = "fixed-layout";
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				eeprom_reservearea_40000: eeprom@40000 {
+					reg = <0x40000 0x400>;
+				};
+
+				eeprom_reservearea_1c0000: eeprom@1c0000 {
+					reg = <0x1c0000 0x1000>;
+				};
+			};
 		};
 	};
 };
diff --git a/target/linux/econet/dts/en7528_generic.dts b/target/linux/econet/dts/en7528_generic.dts
index d4d25266e3..086d0d36b4 100644
--- a/target/linux/econet/dts/en7528_generic.dts
+++ b/target/linux/econet/dts/en7528_generic.dts
@@ -24,6 +24,14 @@
 	};
 };
 
+&pcie0 {
+	status = "okay";
+};
+
+&pcie1 {
+	status = "okay";
+};
+
 &gmac0 {
 	status = "okay";
 };
diff --git a/target/linux/econet/en751221/config-6.12 b/target/linux/econet/en751221/config-6.12
index 57f4208e28..dd80756777 100644
--- a/target/linux/econet/en751221/config-6.12
+++ b/target/linux/econet/en751221/config-6.12
@@ -139,6 +139,7 @@ CONFIG_PAGE_SIZE_LESS_THAN_64KB=y
 CONFIG_PCI_DRIVERS_LEGACY=y
 CONFIG_PERF_USE_VMALLOC=y
 CONFIG_PGTABLE_LEVELS=2
+# CONFIG_PHY_EN7528_PCIE is not set
 CONFIG_PTP_1588_CLOCK_OPTIONAL=y
 CONFIG_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
diff --git a/target/linux/econet/en7528/config-6.12 b/target/linux/econet/en7528/config-6.12
index 4dc701fe77..49bcddb67c 100644
--- a/target/linux/econet/en7528/config-6.12
+++ b/target/linux/econet/en7528/config-6.12
@@ -4,6 +4,7 @@ CONFIG_ARCH_KEEP_MEMBLOCK=y
 CONFIG_ARCH_MMAP_RND_BITS_MAX=15
 CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MAX=15
 CONFIG_ARCH_SUSPEND_POSSIBLE=y
+CONFIG_BLK_MQ_PCI=y
 CONFIG_BOARD_SCACHE=y
 CONFIG_CLKSRC_MMIO=y
 CONFIG_CLONE_BACKWARDS=y
@@ -73,7 +74,9 @@ CONFIG_GENERIC_LIB_ASHRDI3=y
 CONFIG_GENERIC_LIB_CMPDI2=y
 CONFIG_GENERIC_LIB_LSHRDI3=y
 CONFIG_GENERIC_LIB_UCMPDI2=y
+CONFIG_GENERIC_MSI_IRQ=y
 CONFIG_GENERIC_PCI_IOMAP=y
+CONFIG_GENERIC_PHY=y
 CONFIG_GENERIC_SCHED_CLOCK=y
 CONFIG_GENERIC_SMP_IDLE_THREAD=y
 CONFIG_GENERIC_TIME_VSYSCALL=y
@@ -100,6 +103,7 @@ CONFIG_LIBFDT=y
 CONFIG_LOCK_DEBUGGING_SUPPORT=y
 CONFIG_LZO_COMPRESS=y
 CONFIG_LZO_DECOMPRESS=y
+CONFIG_MFD_SYSCON=y
 CONFIG_MIGRATION=y
 CONFIG_MIPS=y
 CONFIG_MIPS_ASID_BITS=8
@@ -137,7 +141,6 @@ CONFIG_NET_EGRESS=y
 CONFIG_NET_FLOW_LIMIT=y
 CONFIG_NET_INGRESS=y
 CONFIG_NET_XGRESS=y
-CONFIG_NO_GENERIC_PCI_IOPORT_MAP=y
 CONFIG_NR_CPUS=4
 CONFIG_NVMEM=y
 CONFIG_NVMEM_LAYOUTS=y
@@ -153,9 +156,16 @@ CONFIG_PADATA=y
 CONFIG_PAGE_POOL=y
 CONFIG_PAGE_SIZE_LESS_THAN_256KB=y
 CONFIG_PAGE_SIZE_LESS_THAN_64KB=y
-CONFIG_PCI_DRIVERS_LEGACY=y
+CONFIG_PCI=y
+CONFIG_PCIE_MEDIATEK=y
+CONFIG_PCI_DOMAINS=y
+CONFIG_PCI_DOMAINS_GENERIC=y
+CONFIG_PCI_DRIVERS_GENERIC=y
+CONFIG_PCI_MSI=y
+CONFIG_PCI_MSI_ARCH_FALLBACKS=y
 CONFIG_PERF_USE_VMALLOC=y
 CONFIG_PGTABLE_LEVELS=2
+CONFIG_PHY_EN7528_PCIE=y
 CONFIG_PTP_1588_CLOCK_OPTIONAL=y
 CONFIG_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
diff --git a/target/linux/econet/en7528/target.mk b/target/linux/econet/en7528/target.mk
index e5e29d915d..0cd6158b81 100644
--- a/target/linux/econet/en7528/target.mk
+++ b/target/linux/econet/en7528/target.mk
@@ -6,7 +6,7 @@ BOARDNAME:=EN7528 based boards
 CPU_TYPE:=24kc
 KERNELNAME:=vmlinuz.bin
 
-DEFAULT_PACKAGES += kmod-leds-gpio kmod-gpio-button-hotplug
+DEFAULT_PACKAGES += kmod-leds-gpio kmod-gpio-button-hotplug wpad-basic-mbedtls
 
 define Target/Description
 	Build firmware images for EcoNet EN7528 based boards.
diff --git a/target/linux/econet/image/en7528.mk b/target/linux/econet/image/en7528.mk
index d718bfdb62..d608a28bc5 100644
--- a/target/linux/econet/image/en7528.mk
+++ b/target/linux/econet/image/en7528.mk
@@ -11,6 +11,7 @@ define Device/dasan_h660gm-a
   DEVICE_VENDOR := DASAN
   DEVICE_MODEL := H660GM-A
   DEVICE_DTS := en7528_dasan_h660gm-a
+  DEVICE_PACKAGES := kmod-mt7603 kmod-mt7615e kmod-mt7663-firmware-ap
   TRX_MODEL := Dewberry
   IMAGES := tclinux.trx
   IMAGE/tclinux.trx := append-kernel | lzma | tclinux-trx
diff --git a/target/linux/econet/patches-6.12/912-pcie-add-en7528-pcie-and-phy-support.patch b/target/linux/econet/patches-6.12/912-pcie-add-en7528-pcie-and-phy-support.patch
new file mode 100644
index 0000000000..e98bda7d61
--- /dev/null
+++ b/target/linux/econet/patches-6.12/912-pcie-add-en7528-pcie-and-phy-support.patch
@@ -0,0 +1,327 @@
+--- a/drivers/pci/controller/Kconfig
++++ b/drivers/pci/controller/Kconfig
+@@ -187,7 +187,7 @@ config PCI_MVEBU
+ 
+ config PCIE_MEDIATEK
+ 	tristate "MediaTek PCIe controller"
+-	depends on ARCH_AIROHA || ARCH_MEDIATEK || COMPILE_TEST
++	depends on ARCH_AIROHA || ARCH_MEDIATEK || ECONET || COMPILE_TEST
+ 	depends on OF
+ 	depends on PCI_MSI
+ 	help
+--- a/arch/mips/econet/Kconfig
++++ b/arch/mips/econet/Kconfig
+@@ -28,9 +28,11 @@ choice
+ 		bool "EN7528 family"
+ 		select COMMON_CLK
+ 		select CPU_LITTLE_ENDIAN
++		select HAVE_PCI
+ 		select IRQ_MIPS_CPU
+ 		select MIPS_CPU_SCACHE
+ 		select MIPS_GIC
++		select PCI_DRIVERS_GENERIC
+ 		select SMP
+ 		select SMP_UP
+ 		select SYS_SUPPORTS_HIGHMEM
+--- a/drivers/pci/controller/pcie-mediatek.c
++++ b/drivers/pci/controller/pcie-mediatek.c
+@@ -76,6 +76,7 @@
+ 
+ #define PCIE_CONF_VEND_ID	0x100
+ #define PCIE_CONF_DEVICE_ID	0x102
++#define PCIE_CONF_REV_CLASS	0x104
+ #define PCIE_CONF_CLASS_ID	0x106
+ 
+ #define PCIE_INT_MASK		0x420
+@@ -88,6 +89,11 @@
+ #define MSI_MASK		BIT(23)
+ #define MTK_MSI_IRQS_NUM	32
+ 
++#define EN7528_HOST_MODE	0x00804201
++#define EN7528_LINKUP_REG	0x50
++#define EN7528_RC0_LINKUP		BIT(1)
++#define EN7528_RC1_LINKUP		BIT(2)
++
+ #define PCIE_AHB_TRANS_BASE0_L	0x438
+ #define PCIE_AHB_TRANS_BASE0_H	0x43c
+ #define AHB2PCIE_SIZE(x)	((x) & GENMASK(4, 0))
+@@ -748,6 +754,86 @@ static int mtk_pcie_startup_port_v2(stru
+ 	return 0;
+ }
+ 
++static int mtk_pcie_startup_port_en7528(struct mtk_pcie_port *port)
++{
++	struct mtk_pcie *pcie = port->pcie;
++	struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
++	struct resource *mem = NULL;
++	struct resource_entry *entry;
++	u32 val, link_mask;
++	int err;
++
++	entry = resource_list_first_type(&host->windows, IORESOURCE_MEM);
++	if (entry)
++		mem = entry->res;
++	if (!mem)
++		return -EINVAL;
++
++	if (!pcie->cfg) {
++		dev_err(pcie->dev, "EN7528: pciecfg syscon not available\n");
++		return -EINVAL;
++	}
++
++	/* Assert all reset signals */
++	writel(0, port->base + PCIE_RST_CTRL);
++
++	/*
++	 * Enable PCIe link down reset, if link status changed from link up to
++	 * link down, this will reset MAC control registers and configuration
++	 * space.
++	 */
++	writel(PCIE_LINKDOWN_RST_EN, port->base + PCIE_RST_CTRL);
++
++	/*
++	 * Described in PCIe CEM specification sections 2.2 (PERST# Signal) and
++	 * 2.2.1 (Initial Power-Up (G3 to S0)). The deassertion of PERST#
++	 * should be delayed 100ms (TPVPERL) for the power and clock to become
++	 * stable.
++	 */
++	msleep(100);
++
++	/* De-assert PHY, PE, PIPE, MAC and configuration reset */
++	val = readl(port->base + PCIE_RST_CTRL);
++	val |= PCIE_PHY_RSTB | PCIE_PERSTB | PCIE_PIPE_SRSTB |
++	       PCIE_MAC_SRSTB | PCIE_CRSTB;
++	writel(val, port->base + PCIE_RST_CTRL);
++
++	writel(PCIE_CLASS_CODE | PCIE_REVISION_ID,
++	       port->base + PCIE_CONF_REV_CLASS);
++	writel(EN7528_HOST_MODE, port->base);
++
++	link_mask = (port->slot == 0) ? EN7528_RC0_LINKUP : EN7528_RC1_LINKUP;
++
++	/* 100ms timeout value should be enough for Gen1/2 training */
++	err = regmap_read_poll_timeout(pcie->cfg, EN7528_LINKUP_REG, val,
++				       !!(val & link_mask), 20,
++				       100 * USEC_PER_MSEC);
++	if (err) {
++		dev_err(pcie->dev, "EN7528: port%d link timeout\n", port->slot);
++		return -ETIMEDOUT;
++	}
++
++	/* Set INTx mask */
++	val = readl(port->base + PCIE_INT_MASK);
++	val &= ~INTX_MASK;
++	writel(val, port->base + PCIE_INT_MASK);
++
++	if (IS_ENABLED(CONFIG_PCI_MSI))
++		mtk_pcie_enable_msi(port);
++
++	/* Set AHB to PCIe translation windows */
++	val = lower_32_bits(mem->start) |
++	      AHB2PCIE_SIZE(fls(resource_size(mem)));
++	writel(val, port->base + PCIE_AHB_TRANS_BASE0_L);
++
++	val = upper_32_bits(mem->start);
++	writel(val, port->base + PCIE_AHB_TRANS_BASE0_H);
++
++	writel(WIN_ENABLE, port->base + PCIE_AXI_WINDOW0);
++
++	return 0;
++}
++
+ static void __iomem *mtk_pcie_map_bus(struct pci_bus *bus,
+ 				      unsigned int devfn, int where)
+ {
+@@ -1114,6 +1200,20 @@ static int mtk_pcie_probe(struct platfor
+ 	if (err)
+ 		goto put_resources;
+ 
++	/* Retrain Gen1 links to reach Gen2 where supported */
++	if (pcie->soc->startup == mtk_pcie_startup_port_en7528) {
++		struct pci_bus *bus = host->bus;
++		struct pci_dev *rc = NULL;
++
++		while ((rc = pci_get_class(PCI_CLASS_BRIDGE_PCI << 8, rc))) {
++			if (rc->bus != bus)
++				continue;
++			if (!pcie_retrain_link(rc, true))
++				dev_info(dev, "port%d link retrained\n",
++					 PCI_SLOT(rc->devfn));
++		}
++	}
++
+ 	return 0;
+ 
+ put_resources:
+@@ -1223,12 +1323,19 @@ static const struct mtk_pcie_soc mtk_pci
+ 	.setup_irq = mtk_pcie_setup_irq,
+ };
+ 
++static const struct mtk_pcie_soc mtk_pcie_soc_en7528 = {
++	.ops = &mtk_pcie_ops_v2,
++	.startup = mtk_pcie_startup_port_en7528,
++	.setup_irq = mtk_pcie_setup_irq,
++};
++
+ static const struct of_device_id mtk_pcie_ids[] = {
+ 	{ .compatible = "mediatek,mt2701-pcie", .data = &mtk_pcie_soc_v1 },
+ 	{ .compatible = "mediatek,mt7623-pcie", .data = &mtk_pcie_soc_v1 },
+ 	{ .compatible = "mediatek,mt2712-pcie", .data = &mtk_pcie_soc_mt2712 },
+ 	{ .compatible = "mediatek,mt7622-pcie", .data = &mtk_pcie_soc_mt7622 },
+ 	{ .compatible = "mediatek,mt7629-pcie", .data = &mtk_pcie_soc_mt7629 },
++	{ .compatible = "econet,en7528-pcie", .data = &mtk_pcie_soc_en7528 },
+ 	{},
+ };
+ MODULE_DEVICE_TABLE(of, mtk_pcie_ids);
+--- a/drivers/phy/Kconfig
++++ b/drivers/phy/Kconfig
+@@ -82,6 +82,17 @@ config PHY_AIROHA_PCIE
+ 	  This driver create the basic PHY instance and provides initialize
+ 	  callback for PCIe GEN3 port.
+ 
++config PHY_EN7528_PCIE
++	tristate "EcoNet EN7528 PCIe PHY Driver"
++	depends on ECONET || COMPILE_TEST
++	depends on OF
++	select GENERIC_PHY
++	select REGMAP_MMIO
++	help
++	  Say Y here to add support for EcoNet EN7528 PCIe PHY driver.
++	  This driver provides PHY initialization for the two PCIe ports
++	  on EN7528 SoC.
++
+ source "drivers/phy/allwinner/Kconfig"
+ source "drivers/phy/amlogic/Kconfig"
+ source "drivers/phy/broadcom/Kconfig"
+--- a/drivers/phy/Makefile
++++ b/drivers/phy/Makefile
+@@ -11,6 +11,7 @@ obj-$(CONFIG_PHY_XGENE)			+= phy-xgene.o
+ obj-$(CONFIG_PHY_PISTACHIO_USB)		+= phy-pistachio-usb.o
+ obj-$(CONFIG_USB_LGM_PHY)		+= phy-lgm-usb.o
+ obj-$(CONFIG_PHY_AIROHA_PCIE)		+= phy-airoha-pcie.o
++obj-$(CONFIG_PHY_EN7528_PCIE)		+= phy-en7528-pcie.o
+ obj-y					+= allwinner/	\
+ 					   amlogic/	\
+ 					   broadcom/	\
+--- /dev/null
++++ b/drivers/phy/phy-en7528-pcie.c
+@@ -0,0 +1,119 @@
++// SPDX-License-Identifier: GPL-2.0+
++/*
++ * Copyright (C) 2026 Ahmed Naseef <naseefkm@gmail.com>
++ *
++ * EcoNet EN7528 PCIe PHY Driver
++ */
++
++#include <linux/bitops.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/phy/phy.h>
++#include <linux/platform_device.h>
++#include <linux/regmap.h>
++
++struct en7528_pcie_phy_data {
++	u32 reg;
++	u32 mask;
++	u32 val;
++	u32 max_reg;
++};
++
++struct en7528_pcie_phy {
++	struct regmap *regmap;
++	const struct en7528_pcie_phy_data *data;
++};
++
++/* Port 0 PHY: set LCDDS_CLK_PH_INV for PLL operation */
++static const struct en7528_pcie_phy_data en7528_phy_port0 = {
++	.reg = 0x4a0,
++	.mask = BIT(5),
++	.val = BIT(5),
++	.max_reg = 0x4a0,
++};
++
++/* Port 1 PHY: Rx impedance tuning, target R -5 Ohm */
++static const struct en7528_pcie_phy_data en7528_phy_port1 = {
++	.reg = 0xb2c,
++	.mask = GENMASK(13, 12),
++	.val = BIT(12),
++	.max_reg = 0xb2c,
++};
++
++static int en7528_pcie_phy_init(struct phy *phy)
++{
++	struct en7528_pcie_phy *ephy = phy_get_drvdata(phy);
++	const struct en7528_pcie_phy_data *data = ephy->data;
++
++	return regmap_update_bits(ephy->regmap, data->reg,
++				  data->mask, data->val);
++}
++
++static const struct phy_ops en7528_pcie_phy_ops = {
++	.init	= en7528_pcie_phy_init,
++	.owner	= THIS_MODULE,
++};
++
++static int en7528_pcie_phy_probe(struct platform_device *pdev)
++{
++	struct device *dev = &pdev->dev;
++	const struct en7528_pcie_phy_data *data;
++	struct regmap_config regmap_config = {
++		.reg_bits = 32,
++		.val_bits = 32,
++		.reg_stride = 4,
++	};
++	struct phy_provider *provider;
++	struct en7528_pcie_phy *ephy;
++	void __iomem *base;
++	struct phy *phy;
++
++	data = of_device_get_match_data(dev);
++	if (!data)
++		return -EINVAL;
++
++	ephy = devm_kzalloc(dev, sizeof(*ephy), GFP_KERNEL);
++	if (!ephy)
++		return -ENOMEM;
++
++	ephy->data = data;
++
++	base = devm_platform_ioremap_resource(pdev, 0);
++	if (IS_ERR(base))
++		return PTR_ERR(base);
++
++	regmap_config.max_register = data->max_reg;
++	ephy->regmap = devm_regmap_init_mmio(dev, base, &regmap_config);
++	if (IS_ERR(ephy->regmap))
++		return PTR_ERR(ephy->regmap);
++
++	phy = devm_phy_create(dev, dev->of_node, &en7528_pcie_phy_ops);
++	if (IS_ERR(phy))
++		return PTR_ERR(phy);
++
++	phy_set_drvdata(phy, ephy);
++
++	provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
++
++	return PTR_ERR_OR_ZERO(provider);
++}
++
++static const struct of_device_id en7528_pcie_phy_ids[] = {
++	{ .compatible = "econet,en7528-pcie-phy0", .data = &en7528_phy_port0 },
++	{ .compatible = "econet,en7528-pcie-phy1", .data = &en7528_phy_port1 },
++	{ /* sentinel */ }
++};
++MODULE_DEVICE_TABLE(of, en7528_pcie_phy_ids);
++
++static struct platform_driver en7528_pcie_phy_driver = {
++	.probe = en7528_pcie_phy_probe,
++	.driver = {
++		.name = "en7528-pcie-phy",
++		.of_match_table = en7528_pcie_phy_ids,
++	},
++};
++module_platform_driver(en7528_pcie_phy_driver);
++
++MODULE_AUTHOR("Ahmed Naseef <naseefkm@gmail.com>");
++MODULE_DESCRIPTION("EcoNet EN7528 PCIe PHY driver");
++MODULE_LICENSE("GPL v2");
diff --git a/target/linux/econet/patches-6.12/913-pcie-fix-bogus-prefetch-window.patch b/target/linux/econet/patches-6.12/913-pcie-fix-bogus-prefetch-window.patch
new file mode 100644
index 0000000000..a7ee7b7b6c
--- /dev/null
+++ b/target/linux/econet/patches-6.12/913-pcie-fix-bogus-prefetch-window.patch
@@ -0,0 +1,38 @@
+Subject: [PATCH] PCI: Skip bridge window reads when window is not supported
+
+pci_read_bridge_io() and pci_read_bridge_mmio_pref() read bridge window
+registers unconditionally. If the registers are hardwired to zero
+(not implemented), both base and limit will be 0. Since (0 <= 0) is
+true, a bogus window [mem 0x00000000-0x000fffff] or [io 0x0000-0x0fff]
+gets created.
+
+pci_read_bridge_windows() already detects unsupported windows by
+testing register writability and sets io_window/pref_window flags
+accordingly. Check these flags at the start of pci_read_bridge_io()
+and pci_read_bridge_mmio_pref() to skip reading registers when the
+window is not supported.
+
+Suggested-by: Bjorn Helgaas <helgaas@kernel.org>
+Signed-off-by: Ahmed Naseef <naseefkm@gmail.com>
+--- a/drivers/pci/probe.c
++++ b/drivers/pci/probe.c
+@@ -351,6 +351,9 @@ static void pci_read_bridge_io(struct pc
+ 	unsigned long io_mask, io_granularity, base, limit;
+ 	struct pci_bus_region region;
+ 
++	if (!dev->io_window)
++		return;
++
+ 	io_mask = PCI_IO_RANGE_MASK;
+ 	io_granularity = 0x1000;
+ 	if (dev->io_window_1k) {
+@@ -412,6 +415,9 @@ static void pci_read_bridge_mmio_pref(st
+ 	pci_bus_addr_t base, limit;
+ 	struct pci_bus_region region;
+ 
++	if (!dev->pref_window)
++		return;
++
+ 	pci_read_config_word(dev, PCI_PREF_MEMORY_BASE, &mem_base_lo);
+ 	pci_read_config_word(dev, PCI_PREF_MEMORY_LIMIT, &mem_limit_lo);
+ 	base64 = (mem_base_lo & PCI_PREF_RANGE_MASK) << 16;