[U-Boot] [PATCH 3/3] config: Update envs for trats and trats2 - Disable L2 cache

[Lukasz Majewski]

Disable L2 caches for Trats and Trats2 devices.

It turns out that for data downloading with thordown command L2 cache
disablement brings a significant speed improvement.

rootfs - 400 MiB:
- L2 cache enabled:			2.69 MiB/s
- L2 cache disabled: 			5.56 MiB/s

Such improvement is possible due to reduction of the need to invalidate
redundant data, which resides in L2 cache.

Since the sent USB request size at once is 512B (L1 - 32 KiB in total) -
one can be quite confident that it is already available in L1 and L2 can
be disabled.

Change-Id: I911ea18075526f7e8295c30dfcf7a658ebc4e53b
Signed-off-by: Lukasz Majewski <l.majewski at samsung.com>
---
 include/configs/trats.h  |    1 +
 include/configs/trats2.h |    1 +
 2 files changed, 2 insertions(+)

diff --git a/include/configs/trats.h b/include/configs/trats.h
index 0bdfe86..fdd8b46 100644
--- a/include/configs/trats.h
+++ b/include/configs/trats.h
@@ -27,6 +27,7 @@
 #define CONFIG_DISPLAY_CPUINFO
 #define CONFIG_DISPLAY_BOARDINFO
 
+#define CONFIG_SYS_L2CACHE_OFF
 #ifndef CONFIG_SYS_L2CACHE_OFF
 #define CONFIG_SYS_L2_PL310
 #define CONFIG_SYS_PL310_BASE	0x10502000
diff --git a/include/configs/trats2.h b/include/configs/trats2.h
index 8e4b215..83633b0 100644
--- a/include/configs/trats2.h
+++ b/include/configs/trats2.h
@@ -30,6 +30,7 @@
 
 #define CONFIG_SYS_CACHELINE_SIZE	32
 
+#define CONFIG_SYS_L2CACHE_OFF
 #ifndef CONFIG_SYS_L2CACHE_OFF
 #define CONFIG_SYS_L2_PL310
 #define CONFIG_SYS_PL310_BASE	0x10502000
-- 
1.7.10.4