102-arm-mvebu-turris_omnia-Reset-the-board-immediately-o.patch

From 930c46e86123aeea1c73ae55d70ff3dcfc077992 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Beh=C3=BAn?= <marek.behun@nic.cz>
Date: Thu, 17 Feb 2022 13:54:43 +0100
Subject: [PATCH 3/3] arm: mvebu: turris_omnia: Reset the board immediately on
 DDR training failure
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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>
---
 configs/turris_omnia_defconfig | 1 +
 1 file changed, 1 insertion(+)

--- 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