ARM: samsung: make SAMSUNG_DMADEV optional

The only remaining driver using the samsung dmadev code is the broken
samsung-ac97 sound driver. However, as found by Russell's autobuilder,
the elaborate dependency chains around it cause problems with
circular dependencies.

This is an attempt to simplify those dependencies by making the
SAMSUNG_DMADEV option user-selectable. I also try to keep the
default settings for all related options unchanged, so we don't
introduce any regressions against earlier testing on linux-next.

In particular, all s3c64xx and s5p* platforms keep selecting the
pl330 and pl08x drivers they require, but the select statement
is now moved towards the main platform option, and it remains
optional by unselecting CONFIG_DMADEVICES.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Kukjin Kim <kgene.kim@samsung.com>

6 files changed, 16 insertions, 13 deletions

diff --git a/arch/arm/mach-s3c24xx/Kconfig b/arch/arm/mach-s3c24xx/Kconfig
index 04284de7aca5..ad5316ae524e 100644
--- a/arch/arm/mach-s3c24xx/Kconfig
+++ b/arch/arm/mach-s3c24xx/Kconfig
@@ -117,7 +117,7 @@ config S3C24XX_SETUP_TS
           Compile in platform device definition for Samsung TouchScreen.
 
 config S3C24XX_DMA
-        bool "S3C2410 DMA support"
+        bool "S3C2410 DMA support (deprecated)"
         select S3C_DMA
         help
           S3C2410 DMA support. This is needed for drivers like sound which
diff --git a/arch/arm/mach-s3c64xx/Kconfig b/arch/arm/mach-s3c64xx/Kconfig
index 3136d86b0d6e..26ca2427e53d 100644
--- a/arch/arm/mach-s3c64xx/Kconfig
+++ b/arch/arm/mach-s3c64xx/Kconfig
@@ -18,9 +18,9 @@ config CPU_S3C6410
           Enable S3C6410 CPU support
 
 config S3C64XX_PL080
-        bool "S3C64XX DMA using generic PL08x driver"
+        def_bool DMADEVICES
+        select ARM_AMBA
         select AMBA_PL08X
-        select SAMSUNG_DMADEV
 
 config S3C64XX_SETUP_SDHCI
         bool
diff --git a/arch/arm/mach-s5p64x0/Kconfig b/arch/arm/mach-s5p64x0/Kconfig
index bb2111b3751e..26003e23796d 100644
--- a/arch/arm/mach-s5p64x0/Kconfig
+++ b/arch/arm/mach-s5p64x0/Kconfig
@@ -9,16 +9,18 @@ if ARCH_S5P64X0
 
 config CPU_S5P6440
         bool
+        select ARM_AMBA
+        select PL330_DMA if DMADEVICES
         select S5P_SLEEP if PM
-        select SAMSUNG_DMADEV
         select SAMSUNG_WAKEMASK if PM
         help
           Enable S5P6440 CPU support
 
 config CPU_S5P6450
         bool
+        select ARM_AMBA
+        select PL330_DMA if DMADEVICES
         select S5P_SLEEP if PM
-        select SAMSUNG_DMADEV
         select SAMSUNG_WAKEMASK if PM
         help
           Enable S5P6450 CPU support
diff --git a/arch/arm/mach-s5pc100/Kconfig b/arch/arm/mach-s5pc100/Kconfig
index 15170be97a74..c5e3a969b063 100644
--- a/arch/arm/mach-s5pc100/Kconfig
+++ b/arch/arm/mach-s5pc100/Kconfig
@@ -9,8 +9,9 @@ if ARCH_S5PC100
 
 config CPU_S5PC100
         bool
+        select ARM_AMBA
+        select PL330_DMA if DMADEVICES
         select S5P_EXT_INT
-        select SAMSUNG_DMADEV
         help
           Enable S5PC100 CPU support
 
diff --git a/arch/arm/mach-s5pv210/Kconfig b/arch/arm/mach-s5pv210/Kconfig
index 8c3abe521757..f60f2862856d 100644
--- a/arch/arm/mach-s5pv210/Kconfig
+++ b/arch/arm/mach-s5pv210/Kconfig
@@ -11,10 +11,11 @@ if ARCH_S5PV210
 
 config CPU_S5PV210
         bool
+        select ARM_AMBA
+        select PL330_DMA if DMADEVICES
         select S5P_EXT_INT
         select S5P_PM if PM
         select S5P_SLEEP if PM
-        select SAMSUNG_DMADEV
         help
           Enable S5PV210 CPU support
 
diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig
index 243dfcb2ca0e..91911e47a8a1 100644
--- a/arch/arm/plat-samsung/Kconfig
+++ b/arch/arm/plat-samsung/Kconfig
@@ -407,17 +407,16 @@ config SAMSUNG_PM_GPIO
           Include legacy GPIO power management code for platforms not using
           pinctrl-samsung driver.
 
-endif
-
 config SAMSUNG_DMADEV
-        bool
-        select ARM_AMBA
+        bool "Use legacy Samsung DMA abstraction"
+        depends on CPU_S5PV210 || CPU_S5PC100 || ARCH_S5P64X0 || ARCH_S3C64XX
         select DMADEVICES
-        select PL330_DMA if (ARCH_EXYNOS5 || ARCH_EXYNOS4 || CPU_S5PV210 || CPU_S5PC100 || \
-                                        CPU_S5P6450 || CPU_S5P6440)
+        default y
         help
           Use DMA device engine for PL330 DMAC.
 
+endif
+
 config S5P_DEV_MFC
         bool
         help