[PW_SID:972501] Basic device tree support for ESWIN EIC7700 RISC-V SoC

Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml

@@ -58,6 +58,7 @@ properties:
       - items:
           - enum:
               - canaan,k210-plic
+              - eswin,eic7700-plic
               - sifive,fu540-c000-plic
               - spacemit,k1-plic
               - starfive,jh7100-plic

Documentation/devicetree/bindings/riscv/cpus.yaml

@@ -51,6 +51,7 @@ properties:
               - sifive,e5
               - sifive,e7
               - sifive,e71
+              - sifive,p550
               - sifive,rocket0
               - sifive,s7
               - sifive,u5

Documentation/devicetree/bindings/riscv/eswin.yaml

@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/riscv/eswin.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ESWIN SoC-based boards
+
+maintainers:
+  - Min Lin <linmin@eswincomputing.com>
+  - Pinkesh Vaghela <pinkesh.vaghela@einfochips.com>
+  - Pritesh Patel <pritesh.patel@einfochips.com>
+
+description:
+  ESWIN SoC-based boards
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - sifive,hifive-premier-p550
+          - const: eswin,eic7700
+
+additionalProperties: true
+
+...

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -498,6 +498,8 @@ patternProperties:
     description: Espressif Systems Co. Ltd.
   "^est,.*":
     description: ESTeem Wireless Modems
+  "^eswin,.*":
+    description: Beijing ESWIN Technology Group Co. Ltd.
   "^ettus,.*":
     description: NI Ettus Research
   "^eukrea,.*":

MAINTAINERS

@@ -8914,6 +8914,15 @@ L:	linux-can@vger.kernel.org
 S:	Maintained
 F:	drivers/net/can/usb/esd_usb.c
 
+ESWIN DEVICETREES
+M:	Min Lin <linmin@eswincomputing.com>
+M:	Pinkesh Vaghela <pinkesh.vaghela@einfochips.com>
+M:	Pritesh Patel <pritesh.patel@einfochips.com>
+S:	Maintained
+T:	git https://github.com/eswincomputing/linux-next.git
+F:	Documentation/devicetree/bindings/riscv/eswin.yaml
+F:	arch/riscv/boot/dts/eswin/
+
 ET131X NETWORK DRIVER
 M:	Mark Einon <mark.einon@gmail.com>
 S:	Odd Fixes

arch/riscv/Kconfig.socs

@@ -1,5 +1,11 @@
 menu "SoC selection"
 
+config ARCH_ESWIN
+	bool "ESWIN SoCs"
+	help
+	  This enables support for ESWIN SoC platform hardware,
+	  including the ESWIN EIC7700 SoC.
+
 config ARCH_MICROCHIP_POLARFIRE
 	def_bool ARCH_MICROCHIP
 

arch/riscv/boot/dts/Makefile

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 subdir-y += allwinner
 subdir-y += canaan
+subdir-y += eswin
 subdir-y += microchip
 subdir-y += renesas
 subdir-y += sifive

arch/riscv/boot/dts/eswin/Makefile

@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_ARCH_ESWIN) += eic7700-hifive-premier-p550.dtb

arch/riscv/boot/dts/eswin/eic7700-hifive-premier-p550.dts

@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (c) 2024, Beijing ESWIN Computing Technology Co., Ltd.
+ */
+
+/dts-v1/;
+
+#include "eic7700.dtsi"
+
+/ {
+	compatible = "sifive,hifive-premier-p550", "eswin,eic7700";
+	model = "SiFive HiFive Premier P550";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&uart2 {
+	status = "okay";
+};