[PATCH v4 1/4] ARM: BCM5301X: initial support for the BCM5301X/BCM470X SoCs with ARM CPU

[Hauke Mehrtens]

This patch adds support for the BCM5301X/BCM470X SoCs with an ARM CPUs.
Currently just booting to a shell is working and nothing else, no
Ethernet, wifi, flash, ...
I have some pending patches to make Ethernet work for this device.
Mostly device tree support for bcma is missing.

This SoC is used in small office and home router with Broadcom SoCs.
This code should support the BCM4707, BCM4708, BCM4709, BCM53010,
BCM53011 and BCM53012 SoC. It uses one or two ARM Cortex A9
Cores, some highlights are 2 PCIe 2.0 controllers, 4 Gigabit Ethernet
MACs and a USB 3.0 host controller.

This SoC uses a dual core CPU, but this is currently not implemented.
More information about this SoC can be found here:
http://www.anandtech.com/show/5925/broadcom-announces-bcm4708x-and-bcm5301x-socs-for-80211ac-routers

Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 Documentation/devicetree/bindings/arm/bcm4708.txt |    8 +++++
 MAINTAINERS                                       |    7 ++++
 arch/arm/configs/multi_v7_defconfig               |    1 +
 arch/arm/mach-bcm/Kconfig                         |   27 +++++++++++++++
 arch/arm/mach-bcm/Makefile                        |    1 +
 arch/arm/mach-bcm/bcm_5301x.c                     |   37 +++++++++++++++++++++
 6 files changed, 81 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/bcm4708.txt
 create mode 100644 arch/arm/mach-bcm/bcm_5301x.c

diff --git a/Documentation/devicetree/bindings/arm/bcm4708.txt b/Documentation/devicetree/bindings/arm/bcm4708.txt
new file mode 100644
index 0000000..6527fad
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/bcm4708.txt
@@ -0,0 +1,8 @@
+Broadcom BCM4708 device tree bindings
+-------------------------------------------
+
+Boards with the BCM4708 SoC shall have the following properties:
+
+Required root node property:
+
+compatible = "broadcom,bcm4708";
diff --git a/MAINTAINERS b/MAINTAINERS
index 6c20792..2d98736 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1862,6 +1862,13 @@ F:	arch/arm/boot/dts/bcm2835*
 F:	arch/arm/configs/bcm2835_defconfig
 F:	drivers/*/*bcm2835*
 
+BROADCOM BCM5301X ARM ARCHICTURE
+M:	Hauke Mehrtens <hauke at hauke-m.de>
+L:	linux-arm-kernel at lists.infradead.org
+S:	Maintained
+F:	arch/arm/mach-bcm/bcm_5301x.c
+F:	arch/arm/boot/dts/bcm470*
+
 BROADCOM TG3 GIGABIT ETHERNET DRIVER
 M:	Nithin Nayak Sujir <nsujir at broadcom.com>
 M:	Michael Chan <mchan at broadcom.com>
diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index c1df4e9..e7909ce 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -6,6 +6,7 @@ CONFIG_ARCH_MVEBU=y
 CONFIG_MACH_ARMADA_370=y
 CONFIG_MACH_ARMADA_XP=y
 CONFIG_ARCH_BCM=y
+CONFIG_ARCH_BCM_5301X=y
 CONFIG_ARCH_BCM_MOBILE=y
 CONFIG_GPIO_PCA953X=y
 CONFIG_ARCH_HIGHBANK=y
diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index 9fe6d88..e47f9de 100644
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -31,6 +31,33 @@ config ARCH_BCM_MOBILE
 	  BCM11130, BCM11140, BCM11351, BCM28145 and
 	  BCM28155 variants.
 
+config ARCH_BCM_5301X
+	bool "Broadcom BCM470X / BCM5301X ARM SoC" if ARCH_MULTI_V7
+	depends on MMU
+	select ARM_GIC
+	select CACHE_L2X0
+	select HAVE_ARM_SCU if SMP
+	select HAVE_ARM_TWD if SMP
+	select HAVE_SMP
+	select COMMON_CLK
+	select GENERIC_CLOCKEVENTS
+	select GENERIC_TIME
+	select ARM_GLOBAL_TIMER
+	select CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
+	select MIGHT_HAVE_PCI
+	help
+	  Support for Broadcom BCM470X and BCM5301X SoCs with ARM CPU cores.
+
+	  This is a network SoC line mostly used in home routers and
+	  wifi access points.
+	  This inclused the following SoC: BCM53010, BCM53011, BCM53012,
+	  BCM53014, BCM53015, BCM53016, BCM53017, BCM53018, BCM4707,
+	  BCM4708 and BCM4709.
+
+	  Do not confuse this with the BCM4760 which is a totally
+	  different SoC or with the older BCM47XX and BCM53XX based
+	  network SoC using a MIPS CPU, they are supported by arch/mips/bcm47xx
+
 endmenu
 
 endif
diff --git a/arch/arm/mach-bcm/Makefile b/arch/arm/mach-bcm/Makefile
index c2ccd5a..0164913 100644
--- a/arch/arm/mach-bcm/Makefile
+++ b/arch/arm/mach-bcm/Makefile
@@ -13,3 +13,4 @@
 obj-$(CONFIG_ARCH_BCM_MOBILE)	:= board_bcm281xx.o bcm_kona_smc.o bcm_kona_smc_asm.o kona.o
 plus_sec := $(call as-instr,.arch_extension sec,+sec)
 AFLAGS_bcm_kona_smc_asm.o	:=-Wa,-march=armv7-a$(plus_sec)
+obj-$(CONFIG_ARCH_BCM_5301X)	+= bcm_5301x.o
diff --git a/arch/arm/mach-bcm/bcm_5301x.c b/arch/arm/mach-bcm/bcm_5301x.c
new file mode 100644
index 0000000..4b83b52
--- /dev/null
+++ b/arch/arm/mach-bcm/bcm_5301x.c
@@ -0,0 +1,37 @@
+/*
+ * Broadcom BCM470X / BCM5301X ARM platform code.
+ *
+ * Copyright 2013 Hauke Mehrtens <hauke at hauke-m.de>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/clocksource.h>
+#include <linux/clk-provider.h>
+#include <asm/hardware/cache-l2x0.h>
+
+#include <asm/mach/arch.h>
+
+static void __init bcm5301x_timer_init(void)
+{
+	of_clk_init(NULL);
+	clocksource_of_init();
+}
+
+static void __init bcm5301x_dt_init(void)
+{
+	l2x0_of_init(0, ~0UL);
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static const char __initconst *bcm5301x_dt_compat[] = {
+	"brcm,bcm4708",
+	NULL,
+};
+
+DT_MACHINE_START(BCM5301X, "BCM5301X")
+	.init_time	= bcm5301x_timer_init,
+	.init_machine	= bcm5301x_dt_init,
+	.dt_compat	= bcm5301x_dt_compat,
+MACHINE_END
-- 
1.7.10.4