[PATCH v2 16/19] riscv: errata: andes: allow ERRATA_ANDES_CMO on all Andes SoCs

[Mina Hui-Min Chou]

ERRATA_ANDES_CMO depends on ARCH_R9A07G043, so it can only be enabled
for the Renesas RZ/Five, although other Andes SoCs such as those built
on the A27L2 need it too. Drop the dependency, and select
ANDES_LLCACHE and CACHEMAINT_FOR_DMA so that the errata always comes
with its cache driver, which ARCH_R9A07G043 used to guarantee.

As ERRATA_ANDES_CMO is default y, it is now also enabled in the generic
riscv defconfig. The errata only acts on Andes cores at boot, so other
platforms are not affected.

RZ/Five still gets uncached memory for coherent DMA allocations from the
DMA_GLOBAL_POOL that ARCH_R9A07G043 selects. This patch only covers
cache maintenance for streaming DMA; how other platforms provide uncached
memory stays platform specific.

Signed-off-by: Mina Hui-Min Chou <minachou at andestech.com>
---
 arch/riscv/Kconfig.errata | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/Kconfig.errata b/arch/riscv/Kconfig.errata
index 4f77b3c6d7fd..3c43e065aa01 100644
--- a/arch/riscv/Kconfig.errata
+++ b/arch/riscv/Kconfig.errata
@@ -12,7 +12,9 @@ config ERRATA_ANDES
 
 config ERRATA_ANDES_CMO
 	bool "Apply Andes cache management errata"
-	depends on ERRATA_ANDES && ARCH_R9A07G043
+	depends on ERRATA_ANDES
+	select ANDES_LLCACHE
+	select CACHEMAINT_FOR_DMA
 	select RISCV_DMA_NONCOHERENT
 	default y
 	help
-- 
2.34.1