sh: Revamp PCI DMA coherence Kconfig bits.

Leaving this configurable caused more trouble than it was ever worth, so
just make it explicit. Boards that are verified one way or the other can
fix up their selects accordingly. We presently default to non-coherent
for most platforms.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 2d3a69993858..e5ee3b159e50 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -169,6 +169,12 @@ config ARCH_HAS_CPU_IDLE_WAIT
 config IO_TRAPPED
         bool
 
+config DMA_COHERENT
+        bool
+
+config DMA_NONCOHERENT
+        def_bool !DMA_COHERENT
+
 source "init/Kconfig"
 
 source "kernel/Kconfig.freezer"
@@ -217,6 +223,7 @@ config CPU_SHX2
 
 config CPU_SHX3
         bool
+        select DMA_COHERENT
 
 config ARCH_SHMOBILE
         bool