ARM: l2x0/pl310: Refactor Kconfig to be more maintainable
Making CACHE_L2X0 depend on (huge list of MACH_ and ARCH_ configs)
is bothersome to maintain and likely to lead to merge conflicts.
This patch moves the knowledge of which platforms have a L2x0 or
PL310 cache controller to the individual machines. To enable this,
a new MIGHT_HAVE_CACHE_L2X0 config option is introduced to allow
machines to indicate that they may have such a cache controller
independently of each other.
Boards/SoCs which cannot reliably operate without the L2 cache
controller support will need to select CACHE_L2X0 directly from
their own Kconfigs instead. This applies to some TrustZone-enabled
boards where Linux runs in the Normal World, for example.
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
(for cns3xxx)
Acked-by: Tony Lindgren <tony@atomide.com>
(for omap)
Acked-by: Shawn Guo <shawn.guo@linaro.org>
(for imx)
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
(for exynos)
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
(for imx)
Acked-by: Olof Johansson <olof@lixom.net>
(for tegra)
diff --git a/arch/arm/mach-realview/Kconfig b/arch/arm/mach-realview/Kconfig
index dba6d0c..3dd620f8 100644
--- a/arch/arm/mach-realview/Kconfig
+++ b/arch/arm/mach-realview/Kconfig
@@ -12,6 +12,7 @@
bool "Support Multicore Cortex-A9 Tile"
depends on MACH_REALVIEW_EB
select CPU_V7
+ select MIGHT_HAVE_CACHE_L2X0
help
Enable support for the Cortex-A9MPCore tile fitted to the
Realview(R) Emulation Baseboard platform.
@@ -21,6 +22,7 @@
depends on MACH_REALVIEW_EB
select CPU_V6K
select ARCH_HAS_BARRIERS if SMP
+ select MIGHT_HAVE_CACHE_L2X0
help
Enable support for the ARM11MPCore tile fitted to the Realview(R)
Emulation Baseboard platform.
@@ -39,6 +41,7 @@
select CPU_V6K
select ARM_GIC
select HAVE_PATA_PLATFORM
+ select MIGHT_HAVE_CACHE_L2X0
select ARCH_HAS_BARRIERS if SMP
help
Include support for the ARM(R) RealView(R) Platform Baseboard for
@@ -51,6 +54,7 @@
select CPU_V6
select ARM_GIC
select HAVE_TCM
+ select MIGHT_HAVE_CACHE_L2X0
help
Include support for the ARM(R) RealView(R) Platform Baseboard for
ARM1176JZF-S.
@@ -78,6 +82,7 @@
bool "Support RealView(R) Platform Baseboard Explore"
select ARM_GIC
select HAVE_PATA_PLATFORM
+ select MIGHT_HAVE_CACHE_L2X0
select ARCH_SPARSEMEM_ENABLE if CPU_V7 && !REALVIEW_HIGH_PHYS_OFFSET
select ZONE_DMA if SPARSEMEM
help