ipq40xx: ZTE MF287 series: move to gpio-export for modem-reset GPIO

Turn the "gpio-restart" node into a "gpio-export" node for all MF287
variants, similar to the MF287 Pro. Unfortunately, there doesn't seem to be
a "power button blocker" GPIO for the MF287 and MF287 Plus, so a modem
reset always triggers a system reset.

Signed-off-by: Andreas Böhler <[email protected]>

target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4018-mf287.dts

@@ -8,15 +8,10 @@
 / {
 	model = "ZTE MF287";
 	compatible = "zte,mf287";
+};
 
-	/*
-	 * This node is used to restart modem module to avoid anomalous
-	 * behaviours on initial communication.
-	 */
-	gpio-restart {
-		compatible = "gpio-restart";
-		gpios = <&tlmm 5 GPIO_ACTIVE_HIGH>;
-	};
+&gpio_modem_reset {
+	gpios = <&tlmm 5 GPIO_ACTIVE_HIGH>;
 };
 
 &key_reset {

target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4018-mf287_common.dtsi

@@ -35,6 +35,16 @@
 		};
 	};
 
+	gpio_export {
+		compatible = "gpio-export";
+		#size-cells = <0>;
+
+		gpio_modem_reset: modem {
+			gpio-export,name = "modem-reset";
+			gpio-export,output = <0>;
+		};
+	};
+
 	keys {
 		compatible = "gpio-keys";
 

target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4018-mf287plus.dts

@@ -8,15 +8,10 @@
 / {
 	model = "ZTE MF287Plus";
 	compatible = "zte,mf287plus";
+};
 
-	/*
-	 * This node is used to restart modem module to avoid anomalous
-	 * behaviours on initial communication.
-	 */
-	gpio-restart {
-		compatible = "gpio-restart";
-		gpios = <&tlmm 5 GPIO_ACTIVE_HIGH>;
-	};
+&gpio_modem_reset {
+	gpios = <&tlmm 5 GPIO_ACTIVE_HIGH>;
 };
 
 &key_reset {

target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4018-mf287pro.dts

@@ -9,17 +9,6 @@
 	model = "ZTE MF287Pro";
 	compatible = "zte,mf287pro";
 
-	gpio_export {
-		compatible = "gpio-export";
-		#size-cells = <0>;
-
-		modem {
-			gpio-export,name = "modem-reset";
-			gpio-export,output = <0>;
-			gpios = <&tlmm 8 GPIO_ACTIVE_HIGH>;
-		};
-	};
-
 	regulator-usb-vbus {
 		compatible = "regulator-fixed";
 		regulator-name = "USB_VBUS";
@@ -31,6 +20,10 @@
 	};
 };
 
+&gpio_modem_reset {
+	gpios = <&tlmm 8 GPIO_ACTIVE_HIGH>;
+};
+
 &key_reset {
 	gpios = <&tlmm 18 GPIO_ACTIVE_LOW>;
 };