ARM: exynos: introduce EXYNOS_ATAGS symbol

As a preparation for multiplatform support, this introduces
a new Kconfig symbol to split the ATAGS based EXYNOS platforms
from the DT based ones. Turning off CONFIG_EXYNOS_ATAGS disables
all platforms that are not yet converted to DT, and we can
have code that relies on DT checking for this symbol being
disabled.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index 70f94c87479df7d4dc2ab8aa25356461a3066b14..d8c251b13ab8210b928848bbc8796adb56dd333a 100644 (file)
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -85,6 +85,19 @@ config EXYNOS4_MCT
        help
          Use MCT (Multi Core Timer) as kernel timers
 
+config EXYNOS_ATAGS
+       bool "ATAGS based boot for EXYNOS (deprecated)"
+       depends on !ARCH_MULTIPLATFORM
+       depends on ATAGS
+       default y
+       help
+         The EXYNOS platform is moving towards being completely probed
+         through device tree. This enables support for board files using
+         the traditional ATAGS boot format.
+         Note that this option is not available for multiplatform builds.
+
+if EXYNOS_ATAGS
+
 config EXYNOS_DEV_DMA
        bool
        help
@@ -400,6 +413,8 @@ config MACH_SMDK4412
          Machine support for Samsung SMDK4412
 endif
 
+endif
+
 comment "Flattened Device Tree based board for EXYNOS SoCs"
 
 config MACH_EXYNOS4_DT