ath79: add support for MikroTik RouterBOARD mAP lite

The MikroTik RouterBOARD mAPL-2nd (sold as mAP Lite) is a small
2.4 GHz 802.11b/g/n PoE-capable AP.

See https://mikrotik.com/product/RBmAPL-2nD for more info.

Specifications:
 - SoC: Qualcomm Atheros QCA9533
 - RAM: 64 MB
 - Storage: 16 MB NOR
 - Wireless: Atheros AR9531 (SoC) 802.11b/g/n 2x2:2, 1.5 dBi antenna
 - Ethernet: Atheros AR8229 (SoC), 1x 10/100 port, 802.3af/at PoE in
 - 4 user-controllable LEDs:
   · 1x power (green)
   · 1x user (green)
   · 1x lan (green)
   · 1x wlan (green)

Flashing:
 TFTP boot initramfs image and then perform sysupgrade. Follow common
 MikroTik procedure as in https://openwrt.org/toh/mikrotik/common.

Note: following 781d4bfb397cdd12ee0151eb66c577f470e3377d
 The network setup avoids using the integrated switch and connects the
 single Ethernet port directly. This way, link speed (10/100 Mbps) is
 properly reported by eth0.

Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>

target/linux/ath79/dts/qca9533_mikrotik_routerboard-mapl-2nd.dts

@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qca9533_mikrotik_routerboard-16m.dtsi"
+
+/ {
+	compatible = "mikrotik,routerboard-mapl-2nd", "qca,qca9533";
+	model = "MikroTik RouterBOARD mAPL-2nD (mAP lite)";
+
+	aliases {
+		led-boot = &led_user;
+		led-failsafe = &led_user;
+		led-running = &led_user;
+		led-upgrade = &led_user;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&led_power_pin &led_lan_pin>;
+
+		power {
+			label = "green:power";
+			gpios = <&gpio 17 GPIO_ACTIVE_HIGH>;
+			default-state = "on";
+		};
+
+		lan {
+			label = "green:lan";
+			gpios = <&gpio 4 GPIO_ACTIVE_HIGH>;
+		};
+
+		wlan {
+			label = "green:wlan";
+			gpios = <&gpio 11 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "phy0tpt";
+		};
+
+		led_user: user {
+			label = "green:user";
+			gpios = <&gpio 14 GPIO_ACTIVE_HIGH>;
+		};
+	};
+};
+
+&eth0 {
+	status = "okay";
+
+	phy-handle = <&swphy0>;
+
+	gmac-config {
+		device = <&gmac>;
+		switch-phy-swap = <1>;
+	};
+};
+
+&eth1 {
+	compatible = "syscon", "simple-mfd";
+};
+
+&pinmux {
+	led_lan_pin: pinmux_led_lan_pin {
+		pinctrl-single,bits = <0x4 0x0 0xff>;
+	};
+
+	led_power_pin: pinmux_led_power_pin {
+		pinctrl-single,bits = <0x10 0x0 0xff00>;
+	};
+};

target/linux/ath79/image/mikrotik.mk

@@ -55,6 +55,14 @@ define Device/mikrotik_routerboard-lhg-5nd
 endef
 TARGET_DEVICES += mikrotik_routerboard-lhg-5nd
 
+define Device/mikrotik_routerboard-mapl-2nd
+  $(Device/mikrotik_nor)
+  SOC := qca9533
+  DEVICE_MODEL := RouterBOARD mAPL-2nD (mAP lite)
+  IMAGE_SIZE := 16256k
+endef
+TARGET_DEVICES += mikrotik_routerboard-mapl-2nd
+
 define Device/mikrotik_routerboard-sxt-5nd-r2
   $(Device/mikrotik_nand)
   SOC := ar9344

target/linux/ath79/mikrotik/base-files/etc/board.d/01_leds

@@ -6,7 +6,8 @@ board_config_update
 board=$(board_name)
 
 case "$board" in
-mikrotik,routerboard-lhg-2nd)
+mikrotik,routerboard-lhg-2nd|\
+mikrotik,routerboard-mapl-2nd)
 	ucidef_set_led_netdev "lan" "lan" "green:lan" "eth0"
 	;;
 mikrotik,routerboard-lhg-5nd)

target/linux/ath79/mikrotik/base-files/etc/board.d/02_network

@@ -17,6 +17,7 @@ ath79_setup_interfaces()
 	mikrotik,routerboard-912uag-2hpnd|\
 	mikrotik,routerboard-lhg-2nd|\
 	mikrotik,routerboard-lhg-5nd|\
+	mikrotik,routerboard-mapl-2nd|\
 	mikrotik,routerboard-sxt-5nd-r2|\
 	mikrotik,routerboard-wap-g-5hact2hnd|\
 	mikrotik,routerboard-wapr-2nd)
@@ -40,6 +41,7 @@ ath79_setup_macs()
 	mikrotik,routerboard-912uag-2hpnd|\
 	mikrotik,routerboard-lhg-2nd|\
 	mikrotik,routerboard-lhg-5nd|\
+	mikrotik,routerboard-mapl-2nd|\
 	mikrotik,routerboard-sxt-5nd-r2|\
 	mikrotik,routerboard-wap-g-5hact2hnd|\
 	mikrotik,routerboard-wapr-2nd)

target/linux/ath79/mikrotik/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom

@@ -30,6 +30,7 @@ case "$FIRMWARE" in
 	mikrotik,routerboard-wapr-2nd)
 		caldata_mikrotik_ath9k 0x1000 0x440 $(macaddr_add "$mac_base" 1)
 		;;
+	mikrotik,routerboard-mapl-2nd|\
 	mikrotik,routerboard-wap-g-5hact2hnd)
 		caldata_mikrotik_ath9k 0x1000 0x440 $(macaddr_add "$mac_base" 2)
 		;;