ARM: mvebu: add initial support for the Armada 380/385 SOCs

This commit adds the basic support for the Armada 380 and Armada 385
SOCs. These SoCs share most of their IP with the Armada 370/XP
SoCs. The main difference is the use of a Cortex A9 CPU instead of the
PJ4B CPU. The Armada 380 is a single core Cortex-A9, while the Armada
385 is a dual-core Cortex-A9.

The support is introduced in board-v7.c, together with Armada 370/XP,
but a separate DT structure is added, because Armada 38x will need a
different set of SMP operations when the SMP support is introduced.
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>

Documentation/devicetree/bindings/arm/armada-38x.txt

+Marvell Armada 38x Platforms Device Tree Bindings
+-------------------------------------------------
+
+Boards with a SoC of the Marvell Armada 38x family shall have the
+following property:
+
+Required root node property:
+
+ - compatible: must contain either "marvell,armada380" or
+   "marvell,armada385" depending on the variant of the SoC being used.

arch/arm/mach-mvebu/Kconfig

@@ -51,6 +51,20 @@ config MACH_ARMADA_375
 	  Say 'Y' here if you want your kernel to support boards based
 	  on the Marvell Armada 375 SoC with device tree.
 
+config MACH_ARMADA_38X
+	bool "Marvell Armada 380/385 boards"
+	select ARM_ERRATA_720789
+	select ARM_ERRATA_753970
+	select ARM_GIC
+	select ARMADA_38X_CLK
+	select CPU_V7
+	select MACH_MVEBU_V7
+	select NEON
+	select PINCTRL_ARMADA_38X
+	help
+	  Say 'Y' here if you want your kernel to support boards based
+	  on the Marvell Armada 380/385 SoC with device tree.
+
 config MACH_ARMADA_XP
 	bool "Marvell Armada XP boards"
 	select ARMADA_XP_CLK

arch/arm/mach-mvebu/board-v7.c

@@ -125,3 +125,15 @@ DT_MACHINE_START(ARMADA_375_DT, "Marvell Armada 375 (Device Tree)")
 	.restart	= mvebu_restart,
 	.dt_compat	= armada_375_dt_compat,
 MACHINE_END
+
+static const char * const armada_38x_dt_compat[] = {
+	"marvell,armada380",
+	"marvell,armada385",
+	NULL,
+};
+
+DT_MACHINE_START(ARMADA_38X_DT, "Marvell Armada 380/385 (Device Tree)")
+	.init_time	= mvebu_timer_and_clk_init,
+	.restart	= mvebu_restart,
+	.dt_compat	= armada_38x_dt_compat,
+MACHINE_END