[PATCH 2/3] arm: Add support for the Broadcom Northstar SoCs

[Linus Walleij]

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 at milecki.pl>
Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
---
 arch/arm/Kconfig | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 5e112e6a03d6..312f1411f85b 100644
--- 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
@@ -670,6 +670,25 @@ 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
-- 
2.39.1