From b431a51086f89e74aa681b61744bc312255b6cb4 Mon Sep 17 00:00:00 2001 From: Nicolas Boichat Date: Wed, 14 Dec 2016 17:26:12 +0800 Subject: Revert "google/oak: increase the driving strength for 4GB DRAMs" This reverts commit 34a6537512d412363bf56428b7ae284e6dd80fb3, which appears to cause random stability issues on some elm units. BRANCH=oak BUG=chrome-os-partner:60869 BUG=chromium:673349 TEST=None Change-Id: I5ce9e2673db1bc7a1f487a3c3bcce4651a5e3567 Reviewed-on: https://chromium-review.googlesource.com/419862 Commit-Ready: Nicolas Boichat Tested-by: Nicolas Boichat Reviewed-by: Julius Werner Reviewed-on: https://review.coreboot.org/18005 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth --- .../google/oak/sdram_inf/sdram-lpddr3-H9CCNNNBLTBLAR-4GB.inc | 4 ++-- src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EB-4GB.inc | 4 ++-- src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EE-4GB.inc | 4 ++-- 3 files changed, 6 insertions(+), 6 deletions(-) (limited to 'src/mainboard/google') diff --git a/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-H9CCNNNBLTBLAR-4GB.inc b/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-H9CCNNNBLTBLAR-4GB.inc index 6e3b203fed..099a07c1dc 100644 --- a/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-H9CCNNNBLTBLAR-4GB.inc +++ b/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-H9CCNNNBLTBLAR-4GB.inc @@ -1,7 +1,7 @@ { /* 2GB (8Gb + 8Gb) for single rank dram setting */ { - .impedance_drvp = 0xc, - .impedance_drvn = 0xd, + .impedance_drvp = 0x9, + .impedance_drvn = 0xa, .datlat_ucfirst = 19, .ca_train = { diff --git a/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EB-4GB.inc b/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EB-4GB.inc index f03f858b82..0fe16a6104 100644 --- a/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EB-4GB.inc +++ b/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EB-4GB.inc @@ -1,7 +1,7 @@ { /* 4GB (16Gb + 16Gb) for dual rank dram setting */ { - .impedance_drvp = 0xc, - .impedance_drvn = 0xd, + .impedance_drvp = 0x9, + .impedance_drvn = 0xa, .datlat_ucfirst = 19, .ca_train = { diff --git a/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EE-4GB.inc b/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EE-4GB.inc index a9fbcf17ee..e6c3a831e6 100644 --- a/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EE-4GB.inc +++ b/src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EE-4GB.inc @@ -1,7 +1,7 @@ { /* 4GB (16Gb + 16Gb) for dual rank dram setting */ { - .impedance_drvp = 0xc, - .impedance_drvn = 0xd, + .impedance_drvp = 0x9, + .impedance_drvn = 0xa, .datlat_ucfirst = 18, .ca_train = { -- cgit v1.2.3