docs: platform: Add documentation for Renesas RZ/Five SoC

This patch adds documentation to build Renesas RZ/Five (R9A07G043F) SoC.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

docs/platform/generic.md

@@ -47,6 +47,7 @@ RISC-V Platforms Using Generic Platform
 
 * **Andes AE350 Platform** (*[andes-ae350.md]*)
 * **QEMU RISC-V Virt Machine** (*[qemu_virt.md]*)
+* **Renesas RZ/Five SoC** (*[renesas-rzfive.md]*)
 * **Shakti C-class SoC Platform** (*[shakti_cclass.md]*)
 * **SiFive HiFive Unleashed** (*[sifive_fu540.md]*)
 * **Spike** (*[spike.md]*)
@@ -54,6 +55,7 @@ RISC-V Platforms Using Generic Platform
 
 [andes-ae350.md]: andse-ae350.md
 [qemu_virt.md]: qemu_virt.md
+[renesas-rzfive.md]: renesas-rzfive.md
 [shakti_cclass.md]: shakti_cclass.md
 [sifive_fu540.md]: sifive_fu540.md
 [spike.md]: spike.md

docs/platform/platform.md

@@ -39,6 +39,10 @@ OpenSBI currently supports the following virtual and hardware platforms:
   processor based SOCs. More details on this platform can be found in the
   file *[shakti_cclass.md]*.
 
+* **Renesas RZ/Five SoC**: Platform support for Renesas RZ/Five (R9A07G043F) SoC
+  used on the Renesas RZ/Five SMARC EVK board. More details on this platform can
+  be found in the file *[renesas-rzfive.md]*.
+
 The code for these supported platforms can be used as example to implement
 support for other platforms. The *platform/template* directory also provides
 template files for implementing support for a new platform. The *objects.mk*,
@@ -54,3 +58,4 @@ comments to facilitate the implementation.
 [spike.md]: spike.md
 [fpga-openpiton.md]: fpga-openpiton.md
 [shakti_cclass.md]: shakti_cclass.md
+[renesas-rzfive.md]: renesas-rzfive.md

docs/platform/renesas-rzfive.md

@@ -0,0 +1,160 @@
+Renesas RZ/Five SoC (R9A07G043F) Platform
+=========================================
+The RZ/Five microprocessor includes a single RISC-V CPU Core (Andes AX45MP)
+1.0 GHz, 16-bit DDR3L/DDR4 interface. Supported interfaces include:
+- Memory controller for DDR4-1600 / DDR3L-1333 with 16 bits
+- System RAM (RAM of 128 Kbytes (ECC))
+- SPI Multi I/O Bus Controller 1ch
+- SD Card Host Interface/Multimedia Card Interface (SD/MMC) 2ch
+- Serial Sound Interface (SSI) 4ch
+- Sampling Rate Converter (SRC) 1ch
+- USB2.0 host/function interface 2ch (ch0: Host-Function ch1: Host only)
+- Gigabit Ethernet Interface (GbE) 2ch
+- Controller Area Network Interface (CAN) 2ch (CAN-FD ISO 11898-1 (CD2014) compliant)
+- Multi-function Timer Pulse Unit 3 (MTU3a) 9 ch (16 bits × 8 channels, 32 bits × 1 channel)
+- Port Output Enable 3 (POE3)
+- Watchdog Timer (WDT) 1ch
+- General Timer (GTM) 3ch (32bits)
+- I2C Bus Interface (I2C) 4ch
+- Serial Communication Interface with FIFO (SCIFA) 5ch
+- Serial Communication Interface (SCI) 2ch
+- Renesas Serial Peripheral Interface (RSPI) 3ch
+- A/D Converter (ADC) 2ch
+making it ideal for applications such as entry-class social infrastructure
+gateway control and industrial gateway control. More details can be found at
+below link [0].
+
+[0] https://www.renesas.com/us/en/products/microcontrollers-microprocessors/rz-mpus/rzfive-general-purpose-microprocessors-risc-v-cpu-core-andes-ax45mp-single-10-ghz-2ch-gigabit-ethernet
+
+To build platform specific library and firmwares, provide the
+*PLATFORM=generic* parameter to the top level make command.
+
+Platform Options
+----------------
+
+The Renesas RZ/Five platform does not have any platform-specific options.
+
+Building Renesas RZ/Five Platform
+---------------------------------
+
+```
+make PLATFORM=generic
+```
+
+DTS Example: (RZ/Five AX45MP)
+-----------------------------
+
+```
+	compatible = "renesas,r9a07g043f01", "renesas,r9a07g043";
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		timebase-frequency = <12000000>;
+
+		cpu0: cpu@0 {
+			compatible = "andestech,ax45mp", "riscv";
+			device_type = "cpu";
+			reg = <0x0>;
+			status = "okay";
+			riscv,isa = "rv64imafdc";
+			mmu-type = "riscv,sv39";
+			i-cache-size = <0x8000>;
+			i-cache-line-size = <0x40>;
+			d-cache-size = <0x8000>;
+			d-cache-line-size = <0x40>;
+			clocks = <&cpg CPG_CORE R9A07G043_CLK_I>;
+
+			cpu0_intc: interrupt-controller {
+				#interrupt-cells = <1>;
+				compatible = "riscv,cpu-intc";
+				interrupt-controller;
+			};
+		};
+	};
+
+	soc {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		ranges;
+
+		scif0: serial@1004b800 {
+			compatible = "renesas,scif-r9a07g043",
+				     "renesas,scif-r9a07g044";
+			reg = <0 0x1004b800 0 0x400>;
+			interrupts = <412 IRQ_TYPE_LEVEL_HIGH>,
+				     <414 IRQ_TYPE_LEVEL_HIGH>,
+				     <415 IRQ_TYPE_LEVEL_HIGH>,
+				     <413 IRQ_TYPE_LEVEL_HIGH>,
+				     <416 IRQ_TYPE_LEVEL_HIGH>,
+				     <416 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "eri", "rxi", "txi",
+					  "bri", "dri", "tei";
+			clocks = <&cpg CPG_MOD R9A07G043_SCIF0_CLK_PCK>;
+			clock-names = "fck";
+			power-domains = <&cpg>;
+			resets = <&cpg R9A07G043_SCIF0_RST_SYSTEM_N>;
+			status = "disabled";
+		};
+
+		cpg: clock-controller@11010000 {
+			compatible = "renesas,r9a07g043-cpg";
+			reg = <0 0x11010000 0 0x10000>;
+			clocks = <&extal_clk>;
+			clock-names = "extal";
+			#clock-cells = <2>;
+			#reset-cells = <1>;
+			#power-domain-cells = <0>;
+		};
+
+		sysc: system-controller@11020000 {
+			compatible = "renesas,r9a07g043-sysc";
+			reg = <0 0x11020000 0 0x10000>;
+			status = "disabled";
+		};
+
+		pinctrl: pinctrl@11030000 {
+			compatible = "renesas,r9a07g043-pinctrl";
+			reg = <0 0x11030000 0 0x10000>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			#interrupt-cells = <2>;
+			interrupt-controller;
+			gpio-ranges = <&pinctrl 0 0 152>;
+			clocks = <&cpg CPG_MOD R9A07G043_GPIO_HCLK>;
+			power-domains = <&cpg>;
+			resets = <&cpg R9A07G043_GPIO_RSTN>,
+				 <&cpg R9A07G043_GPIO_PORT_RESETN>,
+				 <&cpg R9A07G043_GPIO_SPARE_RESETN>;
+		};
+
+		plmt0: plmt0@110c0000 {
+			compatible = "andestech,plmt0", "riscv,plmt0";
+			reg = <0x0 0x110c0000 0x0 0x10000>;
+			interrupts-extended = <&cpu0_intc 7>;
+		};
+
+		plic: interrupt-controller@12c00000 {
+			compatible = "renesas,r9a07g043-plic", "andestech,nceplic100";
+			#interrupt-cells = <2>;
+			#address-cells = <0>;
+			riscv,ndev = <511>;
+			interrupt-controller;
+			reg = <0x0 0x12c00000 0x0 0x400000>;
+			clocks = <&cpg CPG_MOD R9A07G043_NCEPLIC_ACLK>;
+			power-domains = <&cpg>;
+			resets = <&cpg R9A07G043_NCEPLIC_ARESETN>;
+			interrupts-extended = <&cpu0_intc 11 &cpu0_intc 9>;
+		};
+
+		plicsw: interrupt-controller@13000000 {
+			compatible = "andestech,plicsw";
+			reg = <0x0 0x13000000 0x0 0x400000>;
+			interrupts-extended = <&cpu0_intc 3>;
+			interrupt-controller;
+			#address-cells = <2>;
+			#interrupt-cells = <2>;
+		};
+	};
+```