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| author | David Hendricks <dhendrix@chromium.org> | 2013-08-26 15:12:12 -0700 |
|---|---|---|
| committer | Isaac Christensen <isaac.christensen@se-eng.com> | 2014-08-12 22:07:26 +0200 |
| commit | 42b1b8069c35a4e86772b600ea0264503bf20470 (patch) | |
| tree | 9e53449e38a72e21a10002ed67e1c753ca66afe0 /util/nvramtool/cmos_lowlevel.c | |
| parent | 4610f0e64f92639e6992dc242dabbfbfc1cb7453 (diff) | |
| download | coreboot-42b1b8069c35a4e86772b600ea0264503bf20470.tar.xz | |
Exynos5420: ddr3: fine tuning the DDR3 timing values
Fine tuning DDR timings value for better stability
* Changed Data Driver Strength from 34 ohms to 30 ohms, expected to
enhance signal integrity.
* Changed DQ signal from 0xf to 0x1f000f, to keep default value safe.
* Changed mrs[2] and added new mrs direct command for setting WL/RL
without resetting DLL.
* Added explicit reset value write in phy_con0 instead of just setting
a bit, to ensure that reset happens.
* Added DREX automatic control for ctrl_pd in none read memory state.
This is ported from: https://gerrit.chromium.org/gerrit/61405
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Change-Id: I59e96e6dede7b49c6572548aca664d82ad110bb1
Reviewed-on: https://chromium-review.googlesource.com/66995
Reviewed-by: ron minnich <rminnich@chromium.org>
Commit-Queue: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
(cherry picked from commit ec34b711c6d270672c56d45c370ca14c0aa27ca3)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6611
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'util/nvramtool/cmos_lowlevel.c')
0 files changed, 0 insertions, 0 deletions