ARM: sunxi: Add basic support for Allwinner A1x SoCs

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Stefan Roese <sr@denx.de>

Documentation/arm/sunxi/README

@@ -0,0 +1,19 @@
+ARM Allwinner SoCs
+==================
+
+This document lists all the ARM Allwinner SoCs that are currently
+supported in mainline by the Linux kernel. This document will also
+provide links to documentation and or datasheet for these SoCs.
+
+SunXi family
+------------
+
+  Flavors:
+        Allwinner A10 (sun4i)
+                Datasheet       : http://dl.linux-sunxi.org/A10/A10%20Datasheet%20-%20v1.21%20%282012-04-06%29.pdf
+
+        Allwinner A13 (sun5i)
+                Datasheet       : http://dl.linux-sunxi.org/A13/A13%20Datasheet%20-%20v1.12%20%282012-03-29%29.pdf
+
+  Core: Cortex A8
+  Linux kernel mach directory: arch/arm/mach-sunxi

arch/arm/Kconfig

@@ -1113,6 +1113,8 @@ source "arch/arm/mach-exynos/Kconfig"
 
 source "arch/arm/mach-shmobile/Kconfig"
 
+source "arch/arm/mach-sunxi/Kconfig"
+
 source "arch/arm/mach-prima2/Kconfig"
 
 source "arch/arm/mach-tegra/Kconfig"

arch/arm/Makefile

@@ -193,6 +193,7 @@ machine-$(CONFIG_ARCH_SPEAR13XX)	+= spear13xx
 machine-$(CONFIG_ARCH_SPEAR3XX)		+= spear3xx
 machine-$(CONFIG_MACH_SPEAR600)		+= spear6xx
 machine-$(CONFIG_ARCH_ZYNQ)		+= zynq
+machine-$(CONFIG_ARCH_SUNXI)		+= sunxi
 
 # Platform directory name.  This list is sorted alphanumerically
 # by CONFIG_* macro name.

arch/arm/mach-sunxi/Kconfig

@@ -0,0 +1,9 @@
+config ARCH_SUNXI
+	bool "Allwinner A1X SOCs" if ARCH_MULTI_V7
+	select CLKSRC_MMIO
+	select COMMON_CLK
+	select GENERIC_CLOCKEVENTS
+	select GENERIC_IRQ_CHIP
+	select PINCTRL
+	select SPARSE_IRQ
+	select SUNXI_TIMER

arch/arm/mach-sunxi/Makefile

@@ -0,0 +1 @@
+obj-$(CONFIG_ARCH_SUNXI) += sunxi.o

arch/arm/mach-sunxi/Makefile.boot

@@ -0,0 +1 @@
+zreladdr-$(CONFIG_ARCH_SUNXI)	+= 0x40008000

arch/arm/mach-sunxi/sunxi.c

@@ -0,0 +1,60 @@
+/*
+ * Device Tree support for Allwinner A1X SoCs
+ *
+ * Copyright (C) 2012 Maxime Ripard
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/io.h>
+#include <linux/sunxi_timer.h>
+
+#include <linux/irqchip/sunxi.h>
+
+#include <asm/hardware/vic.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+
+#include "sunxi.h"
+
+static struct map_desc sunxi_io_desc[] __initdata = {
+	{
+		.virtual	= (unsigned long) SUNXI_REGS_VIRT_BASE,
+		.pfn		= __phys_to_pfn(SUNXI_REGS_PHYS_BASE),
+		.length		= SUNXI_REGS_SIZE,
+		.type		= MT_DEVICE,
+	},
+};
+
+void __init sunxi_map_io(void)
+{
+	iotable_init(sunxi_io_desc, ARRAY_SIZE(sunxi_io_desc));
+}
+
+static void __init sunxi_dt_init(void)
+{
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static const char * const sunxi_board_dt_compat[] = {
+	"allwinner,sun5i",
+	NULL,
+};
+
+DT_MACHINE_START(SUNXI_DT, "Allwinner A1X (Device Tree)")
+	.init_machine	= sunxi_dt_init,
+	.map_io		= sunxi_map_io,
+	.init_irq	= sunxi_init_irq,
+	.handle_irq	= sunxi_handle_irq,
+	.timer		= &sunxi_timer,
+	.dt_compat	= sunxi_board_dt_compat,
+MACHINE_END

arch/arm/mach-sunxi/sunxi.h

@@ -0,0 +1,20 @@
+/*
+ * Generic definitions for Allwinner SunXi SoCs
+ *
+ * Copyright (C) 2012 Maxime Ripard
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __MACH_SUNXI_H
+#define __MACH_SUNXI_H
+
+#define SUNXI_REGS_PHYS_BASE	0x01c00000
+#define SUNXI_REGS_VIRT_BASE	IOMEM(0xf1c00000)
+#define SUNXI_REGS_SIZE		(SZ_2M + SZ_1M)
+
+#endif /* __MACH_SUNXI_H */