ARM: SAMSUNG: Introduce SAMSUNG_ATAGS Kconfig entry

This patch adds a Kconfig entry that enables compilation of legacy
support code required for Samsung platforms that require ATAGS based
boot.

This allows to bypass compilation of this code when platforms without
ATAGS support are selected.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

3 files changed, 30 insertions, 8 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index fc20cfc471d0..aa8dcfc27903 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -702,6 +702,7 @@ config ARCH_S3C24XX
         select MULTI_IRQ_HANDLER
         select NEED_MACH_GPIO_H
         select NEED_MACH_IO_H
+        select SAMSUNG_ATAGS
         help
           Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
           and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
@@ -726,6 +727,7 @@ config ARCH_S3C64XX
         select PLAT_SAMSUNG
         select S3C_DEV_NAND
         select S3C_GPIO_TRACK
+        select SAMSUNG_ATAGS
         select SAMSUNG_CLKSRC
         select SAMSUNG_GPIOLIB_4BIT
         select SAMSUNG_IRQ_VIC_TIMER
@@ -744,6 +746,7 @@ config ARCH_S5P64X0
         select HAVE_S3C2410_WATCHDOG if WATCHDOG
         select HAVE_S3C_RTC if RTC_CLASS
         select NEED_MACH_GPIO_H
+        select SAMSUNG_ATAGS
         help
           Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
           SMDK6450.
@@ -760,6 +763,7 @@ config ARCH_S5PC100
         select HAVE_S3C2410_WATCHDOG if WATCHDOG
         select HAVE_S3C_RTC if RTC_CLASS
         select NEED_MACH_GPIO_H
+        select SAMSUNG_ATAGS
         help
           Samsung S5PC100 series based systems
 
@@ -778,6 +782,7 @@ config ARCH_S5PV210
         select HAVE_S3C_RTC if RTC_CLASS
         select NEED_MACH_GPIO_H
         select NEED_MACH_MEMORY_H
+        select SAMSUNG_ATAGS
         help
           Samsung S5PV210/S5PC110 series based systems
 
@@ -796,6 +801,7 @@ config ARCH_EXYNOS
         select HAVE_S3C_RTC if RTC_CLASS
         select NEED_MACH_GPIO_H
         select NEED_MACH_MEMORY_H
+        select SAMSUNG_ATAGS
         select USE_OF
         help
           Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig
index f8ed2de0a678..c0f0542e6dfc 100644
--- a/arch/arm/plat-samsung/Kconfig
+++ b/arch/arm/plat-samsung/Kconfig
@@ -60,6 +60,20 @@ config S3C_LOWLEVEL_UART_PORT
           this configuration should be between zero and two. The port
           must have been initialised by the boot-loader before use.
 
+config SAMSUNG_ATAGS
+        def_bool n
+        depends on !ARCH_MULTIPLATFORM
+        depends on ATAGS
+        help
+           This option enables ATAGS based boot support code for
+           Samsung platforms, including static platform devices, legacy
+           clock, timer and interrupt initialization, etc.
+
+           Platforms that support only DT based boot need not to select
+           this option.
+
+if SAMSUNG_ATAGS
+
 # timer options
 
 config SAMSUNG_HRT
@@ -367,11 +381,6 @@ config S5P_DEV_JPEG
         help
           Compile in platform device definitions for JPEG codec
 
-config S5P_DEV_MFC
-        bool
-        help
-          Compile in setup memory (init) code for MFC
-
 config S5P_DEV_ONENAND
         bool
         help
@@ -412,6 +421,8 @@ config S3C_DMA
         help
           Internal configuration for S3C DMA core
 
+endif
+
 config SAMSUNG_DMADEV
         bool
         select ARM_AMBA
@@ -421,6 +432,11 @@ config SAMSUNG_DMADEV
         help
           Use DMA device engine for PL330 DMAC.
 
+config S5P_DEV_MFC
+        bool
+        help
+          Compile in setup memory (init) code for MFC
+
 comment "Power management"
 
 config SAMSUNG_PM_DEBUG
diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile
index a23c460299a1..b549ea9cfe09 100644
--- a/arch/arm/plat-samsung/Makefile
+++ b/arch/arm/plat-samsung/Makefile
@@ -31,10 +31,10 @@ obj-$(CONFIG_S3C_ADC)	+= adc.o
 
 # devices
 
-obj-y                           += platformdata.o
+obj-$(CONFIG_SAMSUNG_ATAGS)     += platformdata.o
 
-obj-y                           += devs.o
-obj-y                           += dev-uart.o
+obj-$(CONFIG_SAMSUNG_ATAGS)     += devs.o
+obj-$(CONFIG_SAMSUNG_ATAGS)     += dev-uart.o
 obj-$(CONFIG_S5P_DEV_MFC)       += s5p-dev-mfc.o
 obj-$(CONFIG_S5P_DEV_UART)      += s5p-dev-uart.o