ath79: teltonika-rut230: fully support digital output lines

Remove GPIO hog for modem power, as well as define userspace GPIO
switches for enabling and resetting the modem. While at that, define a
switch for the external GPIO available on the power connector.

Signed-off-by: Lech Perczak <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/17503
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/ath79/dts/ar9331_teltonika_rut230-v1.dts

@@ -191,15 +191,6 @@
 	status = "okay";
 };
 
-&gpio {
-	modem-power {
-		gpio-hog;
-		output-low;
-		gpios = <18 GPIO_ACTIVE_HIGH>;
-		line-name = "modem-power";
-	};
-};
-
 &usb_phy {
 	status = "okay";
 };

target/linux/ath79/generic/base-files/etc/board.d/03_gpio_switches

@@ -48,6 +48,11 @@ dlink,dir-835-a1)
 librerouter,librerouter-v1)
 	ucidef_add_gpio_switch "poe_passthrough" "PoE Passthrough" "513" "0"
 	;;
+teltonika,rut230-v1)
+	ucidef_add_gpio_switch "DOUT" "DOUT" "524" "0"
+	ucidef_add_gpio_switch "modem_pwr" "Modem power" "531" "1"
+	ucidef_add_gpio_switch "modem_rst" "Modem reset" "530" "0"
+	;;
 teltonika,rut955)
 	ucidef_add_gpio_switch "sim_sel" "SIM select" "542" "1"
 	ucidef_add_gpio_switch "DOUT1" "DOUT1 (OC)" "543" "0"