diff options
Diffstat (limited to 'recipes-bsp/u-boot/u-boot-toradex/0001-colibri_imx6-fix-RALAT-and-WALAT-values.patch')
| -rw-r--r-- | recipes-bsp/u-boot/u-boot-toradex/0001-colibri_imx6-fix-RALAT-and-WALAT-values.patch | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/recipes-bsp/u-boot/u-boot-toradex/0001-colibri_imx6-fix-RALAT-and-WALAT-values.patch b/recipes-bsp/u-boot/u-boot-toradex/0001-colibri_imx6-fix-RALAT-and-WALAT-values.patch new file mode 100644 index 0000000..3db4695 --- /dev/null +++ b/recipes-bsp/u-boot/u-boot-toradex/0001-colibri_imx6-fix-RALAT-and-WALAT-values.patch @@ -0,0 +1,51 @@ +From ea6fc42a58b92c5771a881a268d2dd5ce602d79e Mon Sep 17 00:00:00 2001 +From: Stefan Eichenberger <stefan.eichenberger@toradex.com> +Date: Wed, 14 Jun 2023 09:12:47 +0200 +Subject: [PATCH] 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 <stefan.eichenberger@toradex.com> +--- + 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 ab2ab587ff..a1e7ec3838 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 +-- +2.39.2 + |