Add support for generic BCM SoC chipsets

In order to start upstreaming Broadcom SoC support, create
a starting hierarchy, arch and dts files.
The first support SoC family that is planned is the
BCM281XX (BCM11130/11140/11351/28145/28155) family of dual A9 mobile
SoC cores.
This code is just the skeleton code for get the machine upstreamed. It
has been made MULTIPLATFORM compatible.
Next steps
----------
Upstream a basic set of drivers - sufficient for a console boot to
ramdisk. These will includer timer, gpio, i2c drivers.
After this basic set, we will proceed with a more comprehensive set
of drivers for the 281XX SoC family.

v2 patch mods
--------
 - Remove l2x0_of_init call as there were problems with the code.
   A separate patch will be submitted with cache init code
 - Rename capri files and refs to bcm281xx-based names
 - Add bcm281xx binding doc
 - various misc cleanups

v3 patch mods
-------------
 - Remove extra #include lines
 - Remove remaining references to capri
 - dt uart chipset string added
 - cleaned up chip # references

v4 patch mods
-------------
 - swap order of compatible definitions for uart
 - fix typo

v5 patch mods
-------------
 - Rename bcm281xx to bcm11351 in dts+code,
   leaving references to bcm281xx only in help+comments.

v6 patch mods
-------------
 - fix typo in uart 'compatible' string

Signed-off-by: Christian Daudt <csd@broadcom.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

3 files changed, 89 insertions, 0 deletions

diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
new file mode 100644
index 000000000000..48705c10a0fe
--- /dev/null
+++ b/arch/arm/mach-bcm/Kconfig
@@ -0,0 +1,19 @@
+config ARCH_BCM
+        bool "Broadcom SoC" if ARCH_MULTI_V7
+        depends on MMU
+        select ARCH_REQUIRE_GPIOLIB
+        select ARM_ERRATA_754322
+        select ARM_ERRATA_764369 if SMP
+        select ARM_GIC
+        select CPU_V7
+        select GENERIC_CLOCKEVENTS
+        select GENERIC_GPIO
+        select GENERIC_TIME
+        select GPIO_BCM
+        select SPARSE_IRQ
+        select TICK_ONESHOT
+        help
+          This enables support for system based on Broadcom SoCs.
+          It currently supports the 'BCM281XX' family, which includes
+          BCM11130, BCM11140, BCM11351, BCM28145 and
+          BCM28155 variants.
diff --git a/arch/arm/mach-bcm/Makefile b/arch/arm/mach-bcm/Makefile
new file mode 100644
index 000000000000..bbf412261e5e
--- /dev/null
+++ b/arch/arm/mach-bcm/Makefile
@@ -0,0 +1,13 @@
+#
+# Copyright (C) 2012 Broadcom Corporation
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation version 2.
+#
+# This program is distributed "as is" WITHOUT ANY WARRANTY of any
+# kind, whether express or implied; without even the implied warranty
+# of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+obj-$(CONFIG_ARCH_BCM) := board_bcm.o
diff --git a/arch/arm/mach-bcm/board_bcm.c b/arch/arm/mach-bcm/board_bcm.c
new file mode 100644
index 000000000000..3a62f1b1cabc
--- /dev/null
+++ b/arch/arm/mach-bcm/board_bcm.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2012 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+
+#include <asm/mach/arch.h>
+#include <asm/hardware/gic.h>
+
+#include <asm/mach/time.h>
+
+static const struct of_device_id irq_match[] = {
+        {.compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
+        {}
+};
+
+static void timer_init(void)
+{
+}
+
+static struct sys_timer timer = {
+        .init = timer_init,
+};
+
+static void __init init_irq(void)
+{
+        of_irq_init(irq_match);
+}
+
+static void __init board_init(void)
+{
+        of_platform_populate(NULL, of_default_bus_match_table, NULL,
+                &platform_bus);
+}
+
+static const char * const bcm11351_dt_compat[] = { "bcm,bcm11351", NULL, };
+
+DT_MACHINE_START(BCM11351_DT, "Broadcom Application Processor")
+        .init_irq = init_irq,
+        .timer = &timer,
+        .init_machine = board_init,
+        .dt_compat = bcm11351_dt_compat,
+        .handle_irq = gic_handle_irq,
+MACHINE_END