[PATCH v1 06/11] arm64: dts: freescale: imx8mm-var-som: Update WiFi/BT configuration

[Stefano Radaelli <stefano.radaelli21@gmail.com>]

From: Stefano Radaelli <stefano.r@variscite.com>

Update the WiFi and Bluetooth configuration on the i.MX8MM VAR-SOM
to match the latest SOM hardware revision.

The SOM now integrates an NXP IW61x wireless module. WiFi is connected
via SDIO and Bluetooth via UART.

This patch:
- Adds an mmc-pwrseq node to handle module reset and power sequencing.
- Updates the USDHC1 node to use the new power sequence and required
  pinctrl configuration.
- Adds the Bluetooth child node under UART2.
- Removes the legacy Broadcom WiFi device node.

Signed-off-by: Stefano Radaelli <stefano.r@variscite.com>
---
 .../boot/dts/freescale/imx8mm-var-som.dtsi    | 41 ++++++++++++++-----
 1 file changed, 30 insertions(+), 11 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi
index cdcd8faad65e..e2b1919d7188 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi
@@ -22,6 +22,14 @@ clk40m: oscillator {
 		clock-output-names = "can_osc";
 	};
 
+	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 */
+	};
+
 	reg_audio_supply: regulator-3p3v {
 		compatible = "regulator-fixed";
 		regulator-name = "wm8904-supply";
@@ -392,11 +400,15 @@ &snvs_pwrkey {
 /* Bluetooth */
 &uart2 {
 	pinctrl-names = "default";
-	pinctrl-0 = <&pinctrl_uart2>;
+	pinctrl-0 = <&pinctrl_uart2>, <&pinctrl_bt>;
 	assigned-clocks = <&clk IMX8MM_CLK_UART2>;
 	assigned-clock-parents = <&clk IMX8MM_SYS_PLL1_80M>;
 	uart-has-rtscts;
 	status = "okay";
+
+	bluetooth_iw61x: bluetooth {
+		compatible = "nxp,88w8987-bt";
+	};
 };
 
 &usbotg1 {
@@ -413,21 +425,15 @@ &usbotg2 {
 
 /* WIFI */
 &usdhc1 {
-	#address-cells = <1>;
-	#size-cells = <0>;
 	pinctrl-names = "default", "state_100mhz", "state_200mhz";
-	pinctrl-0 = <&pinctrl_usdhc1>;
-	pinctrl-1 = <&pinctrl_usdhc1_100mhz>;
-	pinctrl-2 = <&pinctrl_usdhc1_200mhz>;
+	pinctrl-0 = <&pinctrl_usdhc1>, <&pinctrl_wifi>;
+	pinctrl-1 = <&pinctrl_usdhc1_100mhz>, <&pinctrl_wifi>;
+	pinctrl-2 = <&pinctrl_usdhc1_200mhz>, <&pinctrl_wifi>;
 	bus-width = <4>;
 	non-removable;
 	keep-power-in-suspend;
+	mmc-pwrseq = <&iw61x_pwrseq>;
 	status = "okay";
-
-	brcmf: wifi@1 {
-		reg = <1>;
-		compatible = "brcm,bcm4329-fmac";
-	};
 };
 
 /* SD */
@@ -465,6 +471,12 @@ &wdog1 {
 };
 
 &iomuxc {
+	pinctrl_bt: bluetoothgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SD1_DATA4_GPIO2_IO6		0xc1
+		>;
+	};
+
 	pinctrl_can: cangrp {
 		fsl,pins = <
 			MX8MM_IOMUXC_GPIO1_IO05_GPIO1_IO5		0x16
@@ -710,4 +722,11 @@ pinctrl_wdog: wdoggrp {
 			MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B		0x166
 		>;
 	};
+
+	pinctrl_wifi: wifigrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SD2_WP_GPIO2_IO20			0x140
+			MX8MM_IOMUXC_SD1_RESET_B_GPIO2_IO10		0xc1
+		>;
+	};
 };
-- 
2.47.3