Patrick Georgi (pgeorgi@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/11386
-gerrit
commit db95416b8dd6768b1dc739a30729c1bdb79533ed Author: Douglas Anderson dianders@chromium.org Date: Thu Aug 6 09:28:03 2015 -0700
veyron: mickey sdram-lpddr3-samsung-2GB.inc now 40 Ohm
The value of 0x4 (60 Ohm) apperas to be causing lots of problems. Since 0x1 (34.3 Ohm) was _almost_ right, let's try 0x2 (40 Ohm) and hope it's the sweet spot.
BRANCH=None BUG=chrome-os-partner:43626 TEST=My mickey now boots up
Signed-off-by: Patrick Georgi patrick@georgi-clan.de Original-Commit-Id: 06db96e00d39972edbaf8429cbe88bbc66804e15 Original-Change-Id: If8b7d51d058ae000c0af189a648c62fa38a872ac Original-Signed-off-by: Douglas Anderson dianders@chromium.org Original-Reviewed-on: https://chromium-review.googlesource.com/291121 Original-Reviewed-by: Julius Werner jwerner@chromium.org Original-(cherry picked from commit 0dabadca1ab3bb310f85646d020bdcf672014071) Original-Reviewed-on: https://chromium-review.googlesource.com/291291
Change-Id: Id32790c894c09616e32503aa790fa294093eca8a --- .../google/veyron_mickey/sdram_inf/sdram-lpddr3-samsung-2GB.inc | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
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 cc39f62..666b12f 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 @@ -65,8 +65,8 @@ .mr[0] = 0x0, .mr[1] = 0xC3, .mr[2] = 0x6, - /* 60Ohms instead of 34.3 due to bad PCB routing on Mickey. */ - .mr[3] = 0x4 + /* 40 Ohms instead of 34.3 due to bad PCB routing on Mickey. */ + .mr[3] = 0x2 }, .noc_timing = 0x20D266A4, .noc_activate = 0x5B6,