mips: dts: realtek: Add RTL9302C board

Add support for the RTL9302 SoC and the RTL9302C_2xRTL8224_2XGE
reference board.

The RTL930x family of SoCs are Realtek switches with an embedded MIPS
core (800MHz 34Kc). Most of the peripherals are similar to the RTL838x
SoC and can make use of many existing drivers.

Add in full DSA switch support is still a work in progress.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

3 files changed, 153 insertions, 0 deletions

diff --git a/arch/mips/boot/dts/realtek/Makefile b/arch/mips/boot/dts/realtek/Makefile
index fba4e93187a6..d2709798763f 100644
--- a/arch/mips/boot/dts/realtek/Makefile
+++ b/arch/mips/boot/dts/realtek/Makefile
@@ -1,2 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0
 dtb-y	+= cisco_sg220-26.dtb
+dtb-y	+= cameo-rtl9302c-2x-rtl8224-2xge.dtb
diff --git a/arch/mips/boot/dts/realtek/cameo-rtl9302c-2x-rtl8224-2xge.dts b/arch/mips/boot/dts/realtek/cameo-rtl9302c-2x-rtl8224-2xge.dts
new file mode 100644
index 000000000000..77d2566545f2
--- /dev/null
+++ b/arch/mips/boot/dts/realtek/cameo-rtl9302c-2x-rtl8224-2xge.dts
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/dts-v1/;
+
+#include "rtl930x.dtsi"
+
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
+#include <dt-bindings/thermal/thermal.h>
+
+/ {
+	compatible = "cameo,rtl9302c-2x-rtl8224-2xge", "realtek,rtl9302-soc";
+	model = "RTL9302C Development Board";
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x8000000>;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&spi0 {
+	status = "okay";
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <10000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "LOADER";
+				reg = <0x0 0xe0000>;
+				read-only;
+			};
+			partition@e0000 {
+				label = "BDINFO";
+				reg = <0xe0000 0x10000>;
+			};
+			partition@f0000 {
+				label = "SYSINFO";
+				reg = <0xf0000 0x10000>;
+				read-only;
+			};
+			partition@100000 {
+				label = "JFFS2 CFG";
+				reg = <0x100000 0x100000>;
+			};
+			partition@200000 {
+				label = "JFFS2 LOG";
+				reg = <0x200000 0x100000>;
+			};
+			partition@300000 {
+				label = "RUNTIME";
+				reg = <0x300000 0xe80000>;
+			};
+			partition@1180000 {
+				label = "RUNTIME2";
+				reg = <0x1180000 0xe80000>;
+			};
+		};
+	};
+};
diff --git a/arch/mips/boot/dts/realtek/rtl930x.dtsi b/arch/mips/boot/dts/realtek/rtl930x.dtsi
new file mode 100644
index 000000000000..f271940f82be
--- /dev/null
+++ b/arch/mips/boot/dts/realtek/rtl930x.dtsi
@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause
+
+#include "rtl83xx.dtsi"
+
+/ {
+	compatible = "realtek,rtl9302-soc";
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "mips,mips34Kc";
+			reg = <0>;
+			clocks = <&baseclk 0>;
+			clock-names = "cpu";
+		};
+	};
+
+	baseclk: clock-800mhz {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <800000000>;
+	};
+
+	lx_clk: clock-175mhz {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency  = <175000000>;
+	};
+};
+
+&soc {
+	intc: interrupt-controller@3000 {
+		compatible = "realtek,rtl9300-intc", "realtek,rtl-intc";
+		reg = <0x3000 0x18>, <0x3018 0x18>;
+		interrupt-controller;
+		#interrupt-cells = <1>;
+
+		interrupt-parent = <&cpuintc>;
+		interrupts = <2>, <3>, <4>, <5>, <6>, <7>;
+	};
+
+	spi0: spi@1200 {
+		compatible = "realtek,rtl8380-spi";
+		reg = <0x1200 0x100>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+	};
+
+	timer0: timer@3200 {
+		compatible = "realtek,rtl9302-timer", "realtek,otto-timer";
+		reg = <0x3200 0x10>, <0x3210 0x10>, <0x3220 0x10>,
+		    <0x3230 0x10>, <0x3240 0x10>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <7>, <8>, <9>, <10>, <11>;
+		clocks = <&lx_clk>;
+	};
+};
+
+&uart0 {
+	/delete-property/ clock-frequency;
+	clocks = <&lx_clk>;
+
+	interrupt-parent = <&intc>;
+	interrupts = <30>;
+};
+
+&uart1 {
+	/delete-property/ clock-frequency;
+	clocks = <&lx_clk>;
+
+	interrupt-parent = <&intc>;
+	interrupts = <31>;
+};
+