[PATCH v3] arm64: dts: qcom: shikra-iqs: add M.2 Wi-Fi and Bluetooth overlay

[Linghui Wu <linghui.wu@oss.qualcomm.com>]

Add an overlay for M.2 Key-E Wi-Fi and Bluetooth modules on the Qualcomm
Shikra IQS EVK.

The M.2 variant uses the external module connected through the Key-E
connector instead of the onboard WCN3988 devices. Disable the onboard
Wi-Fi and Bluetooth nodes when the overlay is selected so the device tree
matches the hardware variant and does not probe the unavailable onboard
connectivity path.

Describe the PCIe and UART connections through the M.2 connector, the
3.3 V supply, the W_DISABLE signals and the PCIe reset signal.

The Wi-Fi PCIe path was tested on a Shikra IQS EVK with a QCC2072
module. The overlay was applied, the link trained at Gen2 x1 and the
endpoint enumerated. Bluetooth UART and HCI runtime validation is
pending.

Co-developed-by: Wei Deng <wei.deng@oss.qualcomm.com>
Signed-off-by: Wei Deng <wei.deng@oss.qualcomm.com>
Signed-off-by: Linghui Wu <linghui.wu@oss.qualcomm.com>
---
Changes in v2:
- Drop regulator-boot-on and startup-delay-us from the 3.3 V regulator.

Changes in v3:
- Drop the unused reg override from the disabled TC9563 node.

 arch/arm64/boot/dts/qcom/Makefile             |   1 +
 .../dts/qcom/shikra-iqs-evk-m2-wifi-bt.dtso   | 105 +++++++++++++++++
 2 files changed, 106 insertions(+)
 create mode 100644 arch/arm64/boot/dts/qcom/shikra-iqs-evk-m2-wifi-bt.dtso

diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 1c86e7e98f55..799faa32e2d9 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -339,6 +339,7 @@ dtb-$(CONFIG_ARCH_QCOM)	+= sdx75-idp.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= shikra-cqm-evk.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= shikra-cqs-evk.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= shikra-iqs-evk.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= shikra-iqs-evk-m2-wifi-bt.dtbo
 dtb-$(CONFIG_ARCH_QCOM)	+= sm4250-oneplus-billie2.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm4450-qrd.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm6115-fxtec-pro1x.dtb
diff --git a/arch/arm64/boot/dts/qcom/shikra-iqs-evk-m2-wifi-bt.dtso b/arch/arm64/boot/dts/qcom/shikra-iqs-evk-m2-wifi-bt.dtso
new file mode 100644
index 000000000000..9496c6558eef
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/shikra-iqs-evk-m2-wifi-bt.dtso
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2026 Qualcomm Technologies, Inc. and/or its subsidiaries.
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+
+&{/} {
+	m2_keye_3p3: regulator-m2-keye-3p3 {
+		compatible = "regulator-fixed";
+		regulator-name = "VREG_3P3_KEYE";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&qps_gpio_expander 6 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
+	wifi-bt-connector {
+		compatible = "pcie-m2-e-connector";
+
+		vpcie3v3-supply = <&m2_keye_3p3>;
+		w-disable1-gpios = <&tlmm 61 GPIO_ACTIVE_LOW>;
+		w-disable2-gpios = <&tlmm 60 GPIO_ACTIVE_LOW>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				m2_e_pcie_ep: endpoint@0 {
+					reg = <0>;
+					remote-endpoint = <&pcie_port0_ep>;
+				};
+			};
+
+			port@3 {
+				reg = <3>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				m2_e_uart_ep: endpoint@0 {
+					reg = <0>;
+					remote-endpoint = <&uart8_ep>;
+				};
+			};
+		};
+	};
+};
+
+&{/wcn3988-pmu} {
+	status = "disabled";
+};
+
+&i2c3 {
+	qps_gpio_expander: gpio@3c {
+		compatible = "nxp,pca9534";
+		reg = <0x3c>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
+};
+
+&pcie {
+	iommu-map = <0x0 &apps_smmu 0x0800 0x0 0x1>,
+		    <0x100 &apps_smmu 0x0801 0x0 0x1>;
+	vddpe-3v3-supply = <&m2_keye_3p3>;
+};
+
+&pcie_port0 {
+	compatible = "pciclass,0604";
+	reset-gpios = <&tlmm 118 GPIO_ACTIVE_LOW>;
+
+	port {
+		pcie_port0_ep: endpoint {
+			remote-endpoint = <&m2_e_pcie_ep>;
+		};
+	};
+};
+
+&tc9563 {
+	status = "disabled";
+};
+
+&uart8 {
+	bluetooth {
+		status = "disabled";
+	};
+
+	port {
+		uart8_ep: endpoint {
+			remote-endpoint = <&m2_e_uart_ep>;
+		};
+	};
+};
+
+&wifi {
+	status = "disabled";
+};
-- 
2.43.0