ARM: at91: sama7: introduce sama7 SoC family

Introduce new family of SoCs, sama7, and first SoC, sama7g5.
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
[claudiu.beznea@microchip.com: keep only the sama7_dt]
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-23-claudiu.beznea@microchip.com

arch/arm/mach-at91/Makefile

@@ -8,6 +8,7 @@ obj-$(CONFIG_SOC_AT91RM9200)	+= at91rm9200.o
 obj-$(CONFIG_SOC_AT91SAM9)	+= at91sam9.o
 obj-$(CONFIG_SOC_SAM9X60)	+= sam9x60.o
 obj-$(CONFIG_SOC_SAMA5)		+= sama5.o
+obj-$(CONFIG_SOC_SAMA7)		+= sama7.o
 obj-$(CONFIG_SOC_SAMV7)		+= samv7.o
 
 # Power Management

arch/arm/mach-at91/sama7.c

+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Setup code for SAMA7
+ *
+ * Copyright (C) 2021 Microchip Technology, Inc. and its subsidiaries
+ *
+ */
+
+#include <linux/of.h>
+#include <linux/of_platform.h>
+
+#include <asm/mach/arch.h>
+#include <asm/system_misc.h>
+
+#include "generic.h"
+
+static void __init sama7_dt_device_init(void)
+{
+	of_platform_default_populate(NULL, NULL, NULL);
+}
+
+static const char *const sama7_dt_board_compat[] __initconst = {
+	"microchip,sama7",
+	NULL
+};
+
+DT_MACHINE_START(sama7_dt, "Microchip SAMA7")
+	/* Maintainer: Microchip */
+	.init_machine	= sama7_dt_device_init,
+	.dt_compat	= sama7_dt_board_compat,
+MACHINE_END
+