From 7683835c191eb4b038b63d035b6e079c36ec15a7 Mon Sep 17 00:00:00 2001 From: Stefan Eichenberger Date: Wed, 14 Jun 2023 09:12:47 +0200 Subject: colibri_imx6: fix RALAT and WALAT values MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Running a memtest in U-Boot and Linux shows that some Colibri iMX6 produce bitflips at temperatures above 60°C. This happens because the RALAT and WALAT values on the Colibri iMX6 are too low. The problems were introduced by commit 09dbac8174c4 ("mx6: ddr: Restore ralat/walat in write level calibration") before the calibration process overwrote the values and set them to the maximum value. With this commit, we make sure that the RALAT and WALAT values are set to the maximum values again. This has been proven to work for years. Upstream-Status: Submitted [https://lore.kernel.org/all/20230614090137.17626-1-francesco@dolcini.it/] Fixes: 09dbac8174c4 ("mx6: ddr: Restore ralat/walat in write level calibration") Signed-off-by: Stefan Eichenberger --- board/toradex/colibri_imx6/colibri_imx6.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/board/toradex/colibri_imx6/colibri_imx6.c b/board/toradex/colibri_imx6/colibri_imx6.c index b1cb9d023f..da29d8beea 100644 --- a/board/toradex/colibri_imx6/colibri_imx6.c +++ b/board/toradex/colibri_imx6/colibri_imx6.c @@ -767,8 +767,7 @@ MX6_MMDC_P1_MPRDDQBY3DL, 0x33333333, /* * MDMISC mirroring interleaved (row/bank/col) */ -/* TODO: check what the RALAT field does */ -MX6_MMDC_P0_MDMISC, 0x00081740, +MX6_MMDC_P0_MDMISC, 0x000b17c0, /* * MDSCR con_req @@ -900,8 +899,7 @@ MX6_MMDC_P1_MPRDDQBY3DL, 0x33333333, /* * MDMISC mirroring interleaved (row/bank/col) */ -/* TODO: check what the RALAT field does */ -MX6_MMDC_P0_MDMISC, 0x00081740, +MX6_MMDC_P0_MDMISC, 0x000b17c0, /* * MDSCR con_req -- cgit v1.2.3