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authorEugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>2019-07-22 12:31:45 +0300
committerVineet Gupta <vgupta@synopsys.com>2019-08-05 19:25:57 +0530
commitce0eff0d9b4d37702df48a39e3fddb5e39b2c25b (patch)
tree554bc668062d026f833cde12eabc58f386721faa /arch/arc/boot
parentda31076f96fc41af41d64e94b9fefe0d21c8ee9c (diff)
downloadlinux-ce0eff0d9b4d37702df48a39e3fddb5e39b2c25b.tar.bz2
ARC: [plat-hsdk]: allow to switch between AXI DMAC port configurations
We want to use DW AXI DMAC on HSDK board in our automated verification to test cache & dma kernel code changes. This is perfect candidate as we don't depend on any external peripherals like MMC card / USB storage / etc. To increase test coverage we want to test both options: * DW AXI DMAC is connected through IOC port & dma direct ops used * DW AXI DMAC is connected to DDR port & dma noncoherent ops used Introduce 'arc_hsdk_axi_dmac_coherent' global variable which can be modified by debugger (same way as we patch 'ioc_enable') to switch between these options without recompiling the kernel. Depend on this value we tweak memory bridge configuration and "dma-coherent" DTS property of DW AXI DMAC. Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Acked-by: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/boot')
-rw-r--r--arch/arc/boot/dts/Makefile3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arc/boot/dts/Makefile b/arch/arc/boot/dts/Makefile
index a83c4f5e928b..8483a86c743d 100644
--- a/arch/arc/boot/dts/Makefile
+++ b/arch/arc/boot/dts/Makefile
@@ -12,3 +12,6 @@ dtb-y := $(builtindtb-y).dtb
# for CONFIG_OF_ALL_DTBS test
dtstree := $(srctree)/$(src)
dtb- := $(patsubst $(dtstree)/%.dts,%.dtb, $(wildcard $(dtstree)/*.dts))
+
+# board-specific dtc flags
+DTC_FLAGS_hsdk += --pad 20