arm: K3: Add support for AM654 SoC definition

The AM654 device is designed for industrial automation and PLC
controller class platforms among other applications. Introduce
base support for AM654 SoC.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

arch/arm/mach-k3/Kconfig

@@ -4,9 +4,40 @@ choice
 	prompt "Texas Instruments' K3 based SoC select"
 	optional
 
+config SOC_K3_AM6
+	bool "TI's K3 based AM6 SoC Family Support"
+
 endchoice
 
 config SYS_SOC
 	default "k3"
 
+config SYS_K3_NON_SECURE_MSRAM_SIZE
+	hex
+	default 0x80000
+	help
+	  Describes the total size of the MCU MSRAM. This doesn't
+	  specify the total size of SPL as ROM can use some part
+	  of this RAM. Once ROM gives control to SPL then this
+	  complete size can be usable.
+
+config SYS_K3_MAX_DOWNLODABLE_IMAGE_SIZE
+	hex
+	default 0x58000
+	help
+	  Describes the maximum size of the image that ROM can download
+	  from any boot media.
+
+config SYS_K3_MCU_SCRATCHPAD_BASE
+	hex
+	default 0x40280000 if SOC_K3_AM6
+	help
+	  Describes the base address of MCU Scratchpad RAM.
+
+config SYS_K3_MCU_SCRATCHPAD_SIZE
+	hex
+	default 0x200 if SOC_K3_AM6
+	help
+	  Describes the size of MCU Scratchpad RAM.
+
 endif

arch/arm/mach-k3/Makefile

+# SPDX-License-Identifier:	GPL-2.0+
+#
+# Copyright (C) 2017-2018 Texas Instruments Incorporated - http://www.ti.com/
+#	Lokesh Vutla <lokeshvutla@ti.com>
+
+obj-$(CONFIG_SOC_K3_AM6) += am6_init.o

arch/arm/mach-k3/am6_init.c

+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * K3: Architecture initialization
+ *
+ * Copyright (C) 2017-2018 Texas Instruments Incorporated - http://www.ti.com/
+ *	Lokesh Vutla <lokeshvutla@ti.com>
+ */
+
+#include <common.h>
+#include <spl.h>
+
+#ifdef CONFIG_SPL_BUILD
+void board_init_f(ulong dummy)
+{
+	/* Init DM early in-order to invoke system controller */
+	spl_early_init();
+
+	/* Prepare console output */
+	preloader_console_init();
+}
+
+u32 spl_boot_device(void)
+{
+	return BOOT_DEVICE_RAM;
+}
+#endif
+
+#ifndef CONFIG_SYSRESET
+void reset_cpu(ulong ignored)
+{
+}
+#endif

arch/arm/mach-k3/include/mach/clock.h

+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * K3: Common SoC clock definitions.
+ *
+ * (C) Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
+ */
+#ifndef __ASM_ARCH_CLOCK_H
+#define __ASM_ARCH_CLOCK_H
+
+#include <config.h>
+
+/* Clock Defines */
+#define V_OSCK				24000000
+#define V_SCLK				V_OSCK
+
+#endif /* __ASM_ARCH_CLOCK_H */