riscv: Add Microchip MPFS Icicle board support

This patch adds Microchip MPFS Icicle board support.
For now, NS16550 serial driver is only enabled.
The Microchip MPFS Icicle defconfig by default builds
U-Boot for M-Mode with SMP support.

Signed-off-by: Padmarao Begari <padmarao.begari@microchip.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>

4 files changed, 70 insertions, 0 deletions

diff --git a/board/microchip/mpfs_icicle/Kconfig b/board/microchip/mpfs_icicle/Kconfig
new file mode 100644
index 0000000000..bf8e1a13ec
--- /dev/null
+++ b/board/microchip/mpfs_icicle/Kconfig
@@ -0,0 +1,26 @@
+if TARGET_MICROCHIP_ICICLE
+
+config SYS_BOARD
+	default "mpfs_icicle"
+
+config SYS_VENDOR
+	default "microchip"
+
+config SYS_CPU
+	default "generic"
+
+config SYS_CONFIG_NAME
+	default "microchip_mpfs_icicle"
+
+config SYS_TEXT_BASE
+	default 0x80000000 if !RISCV_SMODE
+	default 0x80200000 if RISCV_SMODE
+
+config BOARD_SPECIFIC_OPTIONS # dummy
+	def_bool y
+	select GENERIC_RISCV
+	select BOARD_EARLY_INIT_F
+	imply SMP
+	imply SYS_NS16550
+
+endif
diff --git a/board/microchip/mpfs_icicle/MAINTAINERS b/board/microchip/mpfs_icicle/MAINTAINERS
new file mode 100644
index 0000000000..22f3b97d8b
--- /dev/null
+++ b/board/microchip/mpfs_icicle/MAINTAINERS
@@ -0,0 +1,7 @@
+Microchip MPFS icicle
+M:	Padmarao Begari <padmarao.begari@microchip.com>
+M:	Cyril Jean <cyril.jean@microchip.com>
+S:	Maintained
+F:	board/microchip/mpfs_icicle/
+F:	include/configs/microchip_mpfs_icicle.h
+F:	configs/microchip_mpfs_icicle_defconfig
diff --git a/board/microchip/mpfs_icicle/Makefile b/board/microchip/mpfs_icicle/Makefile
new file mode 100644
index 0000000000..72b0410dda
--- /dev/null
+++ b/board/microchip/mpfs_icicle/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2019 Microchip Technology Inc.
+# Padmarao Begari <padmarao.begari@microchip.com>
+#
+
+obj-y	+= mpfs_icicle.o
diff --git a/board/microchip/mpfs_icicle/mpfs_icicle.c b/board/microchip/mpfs_icicle/mpfs_icicle.c
new file mode 100644
index 0000000000..0ef243186d
--- /dev/null
+++ b/board/microchip/mpfs_icicle/mpfs_icicle.c
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Microchip Technology Inc.
+ * Padmarao Begari <padmarao.begari@microchip.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <asm/io.h>
+
+#define MPFS_SYSREG_SOFT_RESET	((unsigned int *)0x20002088)
+
+int board_init(void)
+{
+	/* For now nothing to do here. */
+
+	return 0;
+}
+
+int board_early_init_f(void)
+{
+	unsigned int val;
+
+	/* Reset uart peripheral */
+	val = readl(MPFS_SYSREG_SOFT_RESET);
+	val = (val & ~(1u << 5u));
+	writel(val, MPFS_SYSREG_SOFT_RESET);
+
+	return 0;
+}