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>
diff --git a/board/microchip/mpfs_icicle/mpfs_icicle.c b/board/microchip/mpfs_icicle/mpfs_icicle.c
new file mode 100644
index 0000000..0ef2431
--- /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;
+}