From 140f8f62d7a64659f213e53d1a07c989bfd6ccfe Mon Sep 17 00:00:00 2001 From: "jinkun.hong" Date: Thu, 23 Jul 2015 11:51:51 +0800 Subject: [PATCH] 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: I5517e07fc5716ed4cd58e5502f13ccd61ffb5357 Signed-off-by: jinkun.hong Signed-off-by: Julius Werner Reviewed-on: https://chromium-review.googlesource.com/286333 (cherry picked from commit 1305010aee6818910ad1dec26d9d948505ca281e) Reviewed-on: https://chromium-review.googlesource.com/287415 Commit-Queue: David Hendricks Tested-by: David Hendricks Reviewed-by: David Hendricks --- .../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 0f15ba5074..cc39f621c2 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,