diff options
| author | David Hendricks <dhendrix@chromium.org> | 2013-08-23 15:25:07 -0700 |
|---|---|---|
| committer | Isaac Christensen <isaac.christensen@se-eng.com> | 2014-08-12 22:18:53 +0200 |
| commit | 72a42886505f54e81f437b618af1ab57e95c4b71 (patch) | |
| tree | d2cc82ce1d6236860c3c31af9e5916cfeadf21ee /src/mainboard | |
| parent | dd1aab95a6eb74eac7ea0463f7933d186dbd0efb (diff) | |
exynos5420: ddr3: Switch from 4G setup to 2G setup on exynos5420
This changes the number of chip selects that we configure from 2 to 1.
On current setups with (x16 memory 4Gbit chips) that means that we're
at 2GByte.
Technically we should add a second setting in the ares_ddr3_timings
and select between the two of the based on board strappings. That
would make the CONFIG_RUN_TIME_BANK_NUMBER work properly. I've
changed the ddr3_mem_ctrl_init() so it should handle that, but I'm not
actually doing the board strapping read right now.
This change means that accesses to 0xA0000000 - 0xFFFFFFFF on 2G
systems will no longer put the system in a messed up state (leading to
a hang). It also prevents some of the weird boot behavior that we've
seen that comes and goes depending on U-Boot alignment. See
<http://crosbug.com/p/20577>.
This patch was ported from: https://gerrit.chromium.org/gerrit/66117
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Change-Id: Ib4cfe420aac30bd817438f06d01e8671afc4a27d
Reviewed-on: https://chromium-review.googlesource.com/167210
Commit-Queue: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: ron minnich <rminnich@chromium.org>
(cherry picked from commit 0ea574243058068702e3f6bc7355098745d16880)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6612
Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/mainboard')
| -rw-r--r-- | src/mainboard/google/pit/memory.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/mainboard/google/pit/memory.c b/src/mainboard/google/pit/memory.c index ddd7aa0ff1..4ac3d0c999 100644 --- a/src/mainboard/google/pit/memory.c +++ b/src/mainboard/google/pit/memory.c @@ -86,7 +86,7 @@ const struct mem_timings mem_timings = { DMC_MEMCONTROL_ADD_LAT_PALL_CYCLE(0) | DMC_MEMCONTROL_MEM_TYPE_DDR3 | DMC_MEMCONTROL_MEM_WIDTH_32BIT | - DMC_MEMCONTROL_NUM_CHIP_2 | + DMC_MEMCONTROL_NUM_CHIP_1 | DMC_MEMCONTROL_BL_8 | DMC_MEMCONTROL_PZQ_DISABLE | DMC_MEMCONTROL_MRR_BYTE_7_0, @@ -104,8 +104,8 @@ const struct mem_timings mem_timings = { DMC_CONCONTROL_AREF_EN_DISABLE | DMC_CONCONTROL_IO_PD_CON_DISABLE, .dmc_channels = 1, - .chips_per_channel = 2, - .chips_to_configure = 2, + .chips_per_channel = 1, + .chips_to_configure = 1, .send_zq_init = 1, .gate_leveling_enable = 1, }; |