realtek: add xgs1210-12 b1 and switch to rt-loader

rev B1 is identical to rev A1 except for different PHYs on the 2.5gbps ports (lan9 and lan10)
Both revisions of xgs1210-12 are also switched to use rt-loader to avoid
problems due to overwriting the compressed image in memory when flashing
with the oem firmware (and also to save flash space with respect to gzip
compression)

Signed-off-by: Josh Bendavid <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/20161
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/realtek/dts/rtl9302_zyxel_xgs1210-12-b1.dts

@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/dts-v1/;
+
+#include "rtl9302_zyxel_xgs1210-12-common.dtsi"
+
+/ {
+	compatible = "zyxel,xgs1210-12-b1", "realtek,rtl838x-soc";
+	model = "Zyxel XGS1210-12 B1 Switch";
+};
+
+&mdio_bus0 {
+	phy24: ethernet-phy@24 {
+		reg = <24>;
+		compatible = "ethernet-phy-ieee802.3-c45";
+		rtl9300,smi-address = <1 1>;
+		// Disabled because we do not know how to bring up again
+		// reset-gpios = <&gpio0 21 GPIO_ACTIVE_LOW>;
+	};
+
+	phy25: ethernet-phy@25 {
+		reg = <25>;
+		compatible = "ethernet-phy-ieee802.3-c45";
+		rtl9300,smi-address = <2 2>;
+		// Disabled because we do not know how to bring up again
+		// reset-gpios = <&gpio0 21 GPIO_ACTIVE_LOW>;
+	};
+};
+
+&switch0 {
+	ports {
+		port@24 {
+			reg = <24>;
+			label = "lan9";
+			pcs-handle = <&serdes6>;
+			phy-handle = <&phy24>;
+			phy-mode = "2500base-x";
+			led-set = <1>;
+		};
+		port@25 {
+			reg = <25>;
+			label = "lan10";
+			pcs-handle = <&serdes7>;
+			phy-handle = <&phy25>;
+			phy-mode = "2500base-x";
+			led-set = <1>;
+		};
+	};
+};

target/linux/realtek/image/common.mk

@@ -92,3 +92,25 @@ define Device/zyxel_gs1900
 	uImage none | \
 	check-size 6976k
 endef
+
+define Device/zyxel_xgs1210-12
+  SOC := rtl9302
+  UIMAGE_MAGIC := 0x93001210
+  ZYXEL_VERS := ABTY
+  DEVICE_VENDOR := Zyxel
+  DEVICE_MODEL := XGS1210-12
+  IMAGE_SIZE := 13312k
+  KERNEL := \
+        kernel-bin | \
+        append-dtb | \
+        rt-compress | \
+        rt-loader | \
+        uImage none
+  KERNEL_INITRAMFS := \
+        kernel-bin | \
+        append-dtb | \
+        rt-compress | \
+        zyxel-vers | \
+        rt-loader | \
+        uImage none
+endef

target/linux/realtek/image/rtl930x.mk

@@ -1,5 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
+include ./common.mk
+
 define Build/xikestor-nosimg
   $(STAGING_DIR_HOST)/bin/nosimg-enc -i $@ -o [email protected]
   mv [email protected] $@
@@ -97,23 +99,18 @@ endef
 TARGET_DEVICES += xikestor_sks8310-8x
 
 define Device/zyxel_xgs1210-12-a1
-  SOC := rtl9302
+  $(Device/zyxel_xgs1210-12)
   SUPPORTED_DEVICES += zyxel,xgs1210-12
-  UIMAGE_MAGIC := 0x93001210
-  ZYXEL_VERS := ABTY
-  DEVICE_VENDOR := Zyxel
-  DEVICE_MODEL := XGS1210-12
   DEVICE_VARIANT := A1
-  IMAGE_SIZE := 13312k
-  KERNEL_INITRAMFS := \
-        kernel-bin | \
-        append-dtb | \
-        gzip | \
-        zyxel-vers | \
-        uImage gzip
 endef
 TARGET_DEVICES += zyxel_xgs1210-12-a1
 
+define Device/zyxel_xgs1210-12-b1
+  $(Device/zyxel_xgs1210-12)
+  DEVICE_VARIANT := B1
+endef
+TARGET_DEVICES += zyxel_xgs1210-12-b1
+
 define Device/zyxel_xgs1250-12-common
   SOC := rtl9302
   UIMAGE_MAGIC := 0x93001250