[PATCH v2 06/11] arm64: dts: freescale: imx8mm-var-som: Update WiFi/BT with variants

[Stefano Radaelli]

From: Stefano Radaelli <stefano.r@xxxxxxxxxxxxx>

The VAR-SOM-MX8MM currently integrates the NXP IW61x wireless module,
providing WiFi over SDIO and Bluetooth over UART.

Move the wireless module configuration out of the base
imx8mm-var-som.dtsi and provide dedicated variant includes.
The IW61x configuration is moved to imx8mm-var-som-wifi-bt-iw61x.dtsi
and used by the Symphony evaluation board device tree.

A separate imx8mm-var-som-wifi-brcm-legacy.dtsi include is added to keep
the configuration for the legacy Broadcom SDIO WiFi module used on
earlier SOM revisions.
The Broadcom-based SOM revision is no longer in production, but the
configuration is kept separately to preserve compatibility with existing
boards.

Signed-off-by: Stefano Radaelli <stefano.r@xxxxxxxxxxxxx>
---
v1->v2:
 - Added Wifi/BT dtsi variants for both iw61x and brcm legacy modules

 .../dts/freescale/imx8mm-var-som-symphony.dts |  1 +
 .../imx8mm-var-som-wifi-brcm-legacy.dtsi      | 12 +++++
 .../imx8mm-var-som-wifi-bt-iw61x.dtsi         | 45 +++++++++++++++++++
 .../boot/dts/freescale/imx8mm-var-som.dtsi    |  6 ---
 4 files changed, 58 insertions(+), 6 deletions(-)
 create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-var-som-wifi-brcm-legacy.dtsi
 create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-var-som-wifi-bt-iw61x.dtsi

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts b/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts
index 712892edba8f..51ac8ee34c3b 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts
@@ -7,6 +7,7 @@
 
 #include <dt-bindings/leds/common.h>
 #include "imx8mm-var-som.dtsi"
+#include "imx8mm-var-som-wifi-bt-iw61x.dtsi"
 
 / {
 	model = "Variscite VAR-SOM-MX8MM Symphony evaluation board";
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-var-som-wifi-brcm-legacy.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-var-som-wifi-brcm-legacy.dtsi
new file mode 100644
index 000000000000..f44a846ea6f9
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-var-som-wifi-brcm-legacy.dtsi
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright 2026 Variscite Ltd.
+ */
+
+/* WIFI */
+&usdhc1 {
+	brcmf: wifi@1 {
+		reg = <1>;
+		compatible = "brcm,bcm4329-fmac";
+	};
+};
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-var-som-wifi-bt-iw61x.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-var-som-wifi-bt-iw61x.dtsi
new file mode 100644
index 000000000000..15990d141d2a
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-var-som-wifi-bt-iw61x.dtsi
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright 2026 Variscite Ltd.
+ */
+
+/ {
+	iw61x_pwrseq: wifi-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		post-power-on-delay-ms = <100>;
+		power-off-delay-us = <10000>;
+		reset-gpios = <&gpio2 10 GPIO_ACTIVE_LOW>, /* WIFI_RESET */
+			      <&gpio2 20 GPIO_ACTIVE_LOW>; /* WIFI_PWR_EN */
+	};
+};
+
+&uart2 {
+	pinctrl-0 = <&pinctrl_uart2>, <&pinctrl_bt>;
+
+	bluetooth_iw61x: bluetooth {
+		compatible = "nxp,88w8987-bt";
+	};
+};
+
+/* WIFI */
+&usdhc1 {
+	pinctrl-0 = <&pinctrl_usdhc1>, <&pinctrl_wifi>;
+	pinctrl-1 = <&pinctrl_usdhc1_100mhz>, <&pinctrl_wifi>;
+	pinctrl-2 = <&pinctrl_usdhc1_200mhz>, <&pinctrl_wifi>;
+	mmc-pwrseq = <&iw61x_pwrseq>;
+};
+
+&iomuxc {
+	pinctrl_bt: bluetoothgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SD1_DATA4_GPIO2_IO6	0xc1
+		>;
+	};
+
+	pinctrl_wifi: wifigrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SD2_WP_GPIO2_IO20		0x140
+			MX8MM_IOMUXC_SD1_RESET_B_GPIO2_IO10	0xc1
+		>;
+	};
+};
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi
index 21a4d87c0e26..c37badc4cf27 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi
@@ -390,7 +390,6 @@ &usbotg2 {
 	status = "okay";
 };
 
-/* WIFI */
 &usdhc1 {
 	#address-cells = <1>;
 	#size-cells = <0>;
@@ -402,11 +401,6 @@ &usdhc1 {
 	non-removable;
 	keep-power-in-suspend;
 	status = "okay";
-
-	brcmf: wifi@1 {
-		reg = <1>;
-		compatible = "brcm,bcm4329-fmac";
-	};
 };
 
 /* SD */
-- 
2.47.3