arm: bcmbca: introduce the bcmbca architecture and 47622 SOC

This is the initial support for Broadcom's ARM-based 47622 SOC.

In this change, our first SOC is an armv7 platform called 47622. The
initial support includes a bare-bone implementation and dts with ARM
PL011 uart.

The SOC-specific code resides in arch/arm/mach-bcmbca/<soc> and board
related code is in board/broadcom/bcmba.

The u-boot image can be loaded from flash or network to the entry
point address in the memory and boot from there.

Signed-off-by: William Zhang <william.zhang@broadcom.com>
Signed-off-by: Kursad Oney <kursad.oney@broadcom.com>
Signed-off-by: Anand Gore <anand.gore@broadcom.com>
Reviewed-by: Philippe Reynes <philippe.reynes@softathome.com>
diff --git a/arch/arm/mach-bcmbca/Kconfig b/arch/arm/mach-bcmbca/Kconfig
new file mode 100644
index 0000000..2d49380
--- /dev/null
+++ b/arch/arm/mach-bcmbca/Kconfig
@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2022 Broadcom Ltd
+#
+
+if ARCH_BCMBCA
+
+config BCM47622
+	bool "Support for Broadcom 47622 Family"
+	select SYS_ARCH_TIMER
+	select CPU_V7A
+	select DM_SERIAL
+	select PL01X_SERIAL
+
+endif
+
+source "arch/arm/mach-bcmbca/bcm47622/Kconfig"
diff --git a/arch/arm/mach-bcmbca/Makefile b/arch/arm/mach-bcmbca/Makefile
new file mode 100644
index 0000000..072d4ea
--- /dev/null
+++ b/arch/arm/mach-bcmbca/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2022 Broadcom Ltd
+#
+
+obj-$(CONFIG_BCM47622) += bcm47622/
diff --git a/arch/arm/mach-bcmbca/bcm47622/Kconfig b/arch/arm/mach-bcmbca/bcm47622/Kconfig
new file mode 100644
index 0000000..bce3089
--- /dev/null
+++ b/arch/arm/mach-bcmbca/bcm47622/Kconfig
@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2022 Broadcom Ltd
+#
+
+if BCM47622
+
+config TARGET_BCM947622
+	bool "Broadcom 47622 Reference Board"
+	depends on ARCH_BCMBCA
+
+config SYS_SOC
+	default "bcm47622"
+
+source "board/broadcom/bcmbca/Kconfig"
+
+endif
diff --git a/arch/arm/mach-bcmbca/bcm47622/Makefile b/arch/arm/mach-bcmbca/bcm47622/Makefile
new file mode 100644
index 0000000..beb979a
--- /dev/null
+++ b/arch/arm/mach-bcmbca/bcm47622/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2022 Broadcom Ltd
+#
+obj- += dummy.o