ramips/mt7621: create common DTSI for Mikrotik devices

This moves some common definitions for Mikrotik devices, mainly
routerboot partitions and reset key, to a common DTSI file.

While at it, remove unused hard_config DT label.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 72 insertions, 0 deletions

diff --git a/target/linux/ramips/dts/mt7621_mikrotik.dtsi b/target/linux/ramips/dts/mt7621_mikrotik.dtsi
new file mode 100644
index 0000000000..1fc523ea14
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_mikrotik.dtsi
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	chosen {
+		bootargs = "console=ttyS0,115200";
+	};
+
+	keys: keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <33000000>;
+
+		partitions: partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "RouterBoot";
+				reg = <0x0 0x40000>;
+				read-only;
+				compatible = "mikrotik,routerboot-partitions";
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				partition@0 {
+					label = "bootloader1";
+					reg = <0x0 0x0>;
+					read-only;
+				};
+
+				hard_config {
+					read-only;
+				};
+
+				partition@10000 {
+					label = "bootloader2";
+					reg = <0x10000 0xf000>;
+					read-only;
+				};
+
+				soft_config {
+				};
+
+				partition@30000 {
+					label = "bios";
+					reg = <0x30000 0x1000>;
+					read-only;
+				};
+			};
+		};
+	};
+};