arm: Add support for the Broadcom Northstar SoCs

The original Northstar is an ARM SoC series that comprise
BCM4709x and BCM5301x and uses a dual-core Cortex A9, the
global timer and a few other things.

This series should not be confused with North Star Plus
(NSP) which is partly supported by U-Boot already.

The SoC is well supported by the Linux kernel and OpenWrt
as it is used in many routers.

Since we currently don't need any chip-specific quirks
and can get the system up from just the device tree, a
mach-* directory doesn't even need to be added, just
some small Kconfig fragments.

Cc: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b84c494..60ac7d4 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -357,7 +357,7 @@ config SYS_ARM_ARCH
 
 choice
        prompt "Select the ARM data write cache policy"
-       default SYS_ARM_CACHE_WRITETHROUGH if TARGET_BCMCYGNUS || RZA1
+       default SYS_ARM_CACHE_WRITETHROUGH if TARGET_BCMCYGNUS || TARGET_BCMNS || RZA1
        default SYS_ARM_CACHE_WRITEBACK
 
 config SYS_ARM_CACHE_WRITEBACK
@@ -671,6 +671,25 @@ config TARGET_BCMCYGNUS
        imply HASH_VERIFY
        imply NETDEVICES
 
+config TARGET_BCMNS
+       bool "Support Broadcom Northstar"
+       select CPU_V7A
+       select DM
+       select DM_GPIO
+       select DM_SERIAL
+       select OF_CONTROL
+       select TIMER
+       select SYS_NS16550
+       select ARM_GLOBAL_TIMER
+       imply SYS_THUMB_BUILD
+       imply MTD_RAW_NAND
+       imply NAND_BRCMNAND
+       imply NAND_BRCMNAND_IPROC
+       help
+         Support for Broadcom Northstar SoCs. NS is a dual-core 32-bit
+         ARMv7 Cortex-A9 SoC family including BCM4708, BCM47094,
+         BCM5301x etc.
+
 config TARGET_BCMNS2
        bool "Support Broadcom Northstar2"
        select ARM64