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authorNicolas Boichat <drinkcat@google.com>2016-12-14 17:26:12 +0800
committerPatrick Georgi <pgeorgi@google.com>2017-01-03 22:13:05 +0100
commitb431a51086f89e74aa681b61744bc312255b6cb4 (patch)
tree74ac6014d51a41b05252e544fb3cd21de9dd3b85
parenta765090f0d2f77cb099a60c23da8acaff62cb171 (diff)
downloadcoreboot-b431a51086f89e74aa681b61744bc312255b6cb4.tar.xz
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 <drinkcat@chromium.org> Tested-by: Nicolas Boichat <drinkcat@chromium.org> Reviewed-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/18005 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
-rw-r--r--src/mainboard/google/oak/sdram_inf/sdram-lpddr3-H9CCNNNBLTBLAR-4GB.inc4
-rw-r--r--src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EB-4GB.inc4
-rw-r--r--src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EE-4GB.inc4
3 files changed, 6 insertions, 6 deletions
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 = {