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Revert "google/oak: increase the driving strength for 4GB DRAMs" 

This reverts commit 34a6537512, 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>
This commit is contained in:
Nicolas Boichat 2016-12-14 17:26:12 +08:00 committed by Patrick Georgi
parent a765090f0d
commit b431a51086
3 changed files with 6 additions and 6 deletions
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4
src/mainboard/google/oak/sdram_inf/sdram-lpddr3-H9CCNNNBLTBLAR-4GB.inc
View File

@ -1,7 +1,7 @@
{ /* 2GB (8Gb + 8Gb) for single rank dram setting */ { /* 2GB (8Gb + 8Gb) for single rank dram setting */
{ {
.impedance_drvp = 0xc, .impedance_drvp = 0x9,
.impedance_drvn = 0xd, .impedance_drvn = 0xa,
.datlat_ucfirst = 19, .datlat_ucfirst = 19,
.ca_train = { .ca_train = {

4
src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EB-4GB.inc
View File

@ -1,7 +1,7 @@
{ /* 4GB (16Gb + 16Gb) for dual rank dram setting */ { /* 4GB (16Gb + 16Gb) for dual rank dram setting */
{ {
.impedance_drvp = 0xc, .impedance_drvp = 0x9,
.impedance_drvn = 0xd, .impedance_drvn = 0xa,
.datlat_ucfirst = 19, .datlat_ucfirst = 19,
.ca_train = { .ca_train = {

4
src/mainboard/google/oak/sdram_inf/sdram-lpddr3-K4E6E304EE-4GB.inc
View File

@ -1,7 +1,7 @@
{ /* 4GB (16Gb + 16Gb) for dual rank dram setting */ { /* 4GB (16Gb + 16Gb) for dual rank dram setting */
{ {
.impedance_drvp = 0xc, .impedance_drvp = 0x9,
.impedance_drvn = 0xd, .impedance_drvn = 0xa,
.datlat_ucfirst = 18, .datlat_ucfirst = 18,
.ca_train = { .ca_train = {