arm: mvebu: turris_omnia: Reset the board immediately on DDR training failure

The state of the current DDR training code for Armada 38x is such that
we cannot be sure it will always train successfully - although after the
last change we were yet unable to find a board that failed DDR training,
from experience in the last 2 years we know that it is possible.

The experience also tells us that in many cases the board fails training
only sometimes, and after a reset the training is successful.

Enable the new option that makes the board reset itself on DDR training
failure immediately. Until now we called hang() in such a case, which
meant that the board was reset by the MCU after 120 seconds.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Pali Rohár <pali@kernel.org>

diff --git a/configs/turris_omnia_defconfig b/configs/turris_omnia_defconfig
index 938683616bfca7acc4ad2dc309fe4411c4f48f31..280dd55f001baea71f56d74a215f884524de1db6 100644 (file)
--- a/configs/turris_omnia_defconfig
+++ b/configs/turris_omnia_defconfig
@@ -11,6 +11,7 @@ CONFIG_NR_DRAM_BANKS=2
 CONFIG_SYS_MEMTEST_START=0x00800000
 CONFIG_SYS_MEMTEST_END=0x00ffffff
 CONFIG_TARGET_TURRIS_OMNIA=y
+CONFIG_DDR_RESET_ON_TRAINING_FAILURE=y
 CONFIG_ENV_SIZE=0x10000
 CONFIG_ENV_OFFSET=0xF0000
 CONFIG_ENV_SECT_SIZE=0x10000