boards: arm: add suport for Enclustra Mercury XU boards

This commit adds support for Enclustra's boards with ZynqMP SoC

Signed-off-by: Wojciech Sipak <wsipak@antmicro.com>

boards/arm/mercury_xu/CMakeLists.txt

@@ -0,0 +1,4 @@
+# Copyright (c) 2020, Antmicro
+# SPDX-License-Identifier: Apache-2.0
+zephyr_library()
+zephyr_library_sources(board.c)

boards/arm/mercury_xu/Kconfig.board

@@ -0,0 +1,5 @@
+# Copyright (c) 2020, Antmicro
+# SPDX-License-Identifier: Apache-2.0
+config BOARD_MERCURY_XU
+	bool "Mercury XU Board"
+	depends on SOC_XILINX_ZYNQMP_RPU

boards/arm/mercury_xu/Kconfig.defconfig

@@ -0,0 +1,16 @@
+# Copyright (c) 2020, Antmicro
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_MERCURY_XU
+
+config BOARD
+	default "mercury_xu"
+
+config FLASH_SIZE
+	int
+	default 64
+
+config FLASH_BASE_ADDRESS
+	default 0x08000000
+
+endif

boards/arm/mercury_xu/board.c

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2020, Antmicro
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include <init.h>
+#define MIO_PIN_18	0xff180048
+#define MIO_PIN_19	0xff18004c
+#define MIO_PIN_38	0xff180098
+#define MIO_PIN_39	0xff18009c
+
+#define MIO_DEFAULT	0x0
+#define MIO_UART0	0xc0
+
+static int mercury_xu_init(const struct device *port)
+{
+	/* pinmux settings for uart */
+	sys_write32(MIO_UART0, MIO_PIN_38);
+	sys_write32(MIO_UART0, MIO_PIN_39);
+
+	/* disable misleading pinmux */
+	sys_write32(MIO_DEFAULT, MIO_PIN_18);
+	sys_write32(MIO_DEFAULT, MIO_PIN_19);
+
+	ARG_UNUSED(port);
+	return 0;
+}
+
+SYS_INIT(mercury_xu_init, PRE_KERNEL_2,
+		CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);

boards/arm/mercury_xu/mercury_xu.dts

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2020, Antmicro
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include <arm/xilinx/zynqmp_rpu.dtsi>
+
+/ {
+	model = "Mercury XU";
+	compatible = "xlnx,zynqmp";
+
+	chosen {
+		zephyr,console = &uart0;
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+	};
+};
+
+&uart0 {
+	status = "okay";
+	current-speed = <115200>;
+	clock-frequency = <99999901>;
+};
+
+&ttc0 {
+	status = "okay";
+	clock-frequency = <5000000>;
+};

boards/arm/mercury_xu/mercury_xu.yaml

@@ -0,0 +1,8 @@
+# Copyright (c) 2020, Antmicro
+identifier: mercury_xu
+name: MERCURY-XU
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gnuarmemb

boards/arm/mercury_xu/mercury_xu_defconfig

@@ -0,0 +1,15 @@
+# Copyright (c) 2020, Antmicro
+CONFIG_SOC_XILINX_ZYNQMP_RPU=y
+CONFIG_BOARD_MERCURY_XU=y
+
+# enable uart driver
+CONFIG_SERIAL=y
+CONFIG_UART_XLNX_PS=y
+
+# enable console
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+
+# enable timer
+CONFIG_XLNX_PSTTC_TIMER=y
+CONFIG_SYS_CLOCK_TICKS_PER_SEC=100