[PATCH 3/3] arm64: dts: freescale: imx95-toradex-smarc: Use gpio-hog for WIFI_UART_EN

[Franz Schnyder]

From: Franz Schnyder <franz.schnyder at toradex.com>

On the Toradex SMARC iMX95, the WiFi UART signals are shared with the
JTAG. The WIFI_UART_EN signal is used to select between these
two functions.

Configure the signal as gpio-hog and drive it high to select the UART
function by default. Add a label to override the hog in derived
device trees.

Signed-off-by: Franz Schnyder <franz.schnyder at toradex.com>
---
 arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi b/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi
index a90edefc5197..29e3f5bf867b 100644
--- a/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi
@@ -451,6 +451,13 @@ som_gpio_expander_1: gpio at 21 {
 			"",
 			"",
 			"SMARC_SDIO_WP";
+
+		wifi_uart_en: wifi-uart-en-hog {
+			gpio-hog;
+			gpios = <12 GPIO_ACTIVE_HIGH>;
+			line-name = "WIFI_UART_EN";
+			output-high;
+		};
 	};
 
 	embedded-controller at 28 {
-- 
2.43.0