ipq40xx: enable PoE output on Meraki MR30H

This commit enables PoE output on port 1 of the Meraki MR30H if
the device is powered via 802.3at PoE.

No PoE output is enabled if the device is powered via 802.3af PoE,
as there is insufficient power.

Signed-off-by: Hal Martin <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/20645
Signed-off-by: Robert Marko <[email protected]>

target/linux/ipq40xx/base-files/etc/init.d/poe_switch

@@ -0,0 +1,22 @@
+#!/bin/sh /etc/rc.common
+
+START=21
+STOP=10
+
+boot() {
+	case $(board_name) in
+		meraki,mr30h)
+			if [ $(cat /sys/class/gpio/poeaf_det/value) -eq 0 ]; then
+				echo "1" > /sys/class/gpio/pse_en/value
+			fi
+		;;
+	esac
+}
+
+shutdown() {
+	case $(board_name) in
+		meraki,mr30h)
+			echo "0" > /sys/class/gpio/pse_en/value
+		;;
+	esac
+}

target/linux/ipq40xx/files-6.12/arch/arm/boot/dts/qcom/qcom-ipq4029-mr30h.dts

@@ -79,6 +79,24 @@
 			qcom,ess-interface-select = <TCSR_ESS_PSGMII>;
 		};
 	};
+
+        gpio_export {
+                compatible = "gpio-export";
+                #size-cells = <0>;
+
+                pse_en {
+                        gpio-export,name = "pse_en";
+                        gpio-export,output = <1>;
+                        gpios = <&tlmm 28 GPIO_ACTIVE_LOW>;
+                };
+
+                poeaf_det {
+                        gpio-export,name = "poeaf_det";
+                        gpio-export,input = <0>;
+                        gpios = <&tlmm 29 GPIO_ACTIVE_HIGH>;
+                };
+
+        };
 };
 
 &tricolor {