Patrick Georgi (pgeorgi@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/11051
-gerrit
commit 018852cab9a7cca8eb263e3cc5a8cc542fc3679c Author: jinkun.hong jinkun.hong@rock-chips.com Date: Thu Jul 23 11:51:51 2015 +0800
veyron: update mickey sdram-lpddr3-samsung-2GB.inc
Modify MR3_I/O Configuration, Change 34.3 ohms to 60 ohms. This resolves an issue that was observed on some Mickey boards with the Samsung 2GB LPDDR3 and is believed to be caused by inferior routing on the small PCB. (Elpida 2GB LPDDR3 seems unaffected.)
BUG=chrome-os-partner:41905 TEST=Boot from mickey BRANCH=None
Change-Id: Ic20d9eceb00658c214fd032a2f213dbe0d51a91b Signed-off-by: Patrick Georgi pgeorgi@chromium.org Original-Commit-Id: 1305010aee6818910ad1dec26d9d948505ca281e Original-Change-Id: I5517e07fc5716ed4cd58e5502f13ccd61ffb5357 Original-Signed-off-by: jinkun.hong jinkun.hong@rock-chips.com Original-Signed-off-by: Julius Werner jwerner@chromium.org Original-Reviewed-on: https://chromium-review.googlesource.com/286333 --- .../google/veyron_mickey/sdram_inf/sdram-lpddr3-samsung-2GB.inc | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/mainboard/google/veyron_mickey/sdram_inf/sdram-lpddr3-samsung-2GB.inc b/src/mainboard/google/veyron_mickey/sdram_inf/sdram-lpddr3-samsung-2GB.inc index 0f15ba5..cc39f62 100644 --- a/src/mainboard/google/veyron_mickey/sdram_inf/sdram-lpddr3-samsung-2GB.inc +++ b/src/mainboard/google/veyron_mickey/sdram_inf/sdram-lpddr3-samsung-2GB.inc @@ -65,7 +65,8 @@ .mr[0] = 0x0, .mr[1] = 0xC3, .mr[2] = 0x6, - .mr[3] = 0x1 + /* 60Ohms instead of 34.3 due to bad PCB routing on Mickey. */ + .mr[3] = 0x4 }, .noc_timing = 0x20D266A4, .noc_activate = 0x5B6,