diff options
| author | Derek Basehore <dbasehore@chromium.org> | 2016-10-27 13:51:49 -0700 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-11-17 17:59:22 +0100 |
| commit | 8e1a99546b2cb4e22ffbb7cfc045204bbe7eacd5 (patch) | |
| tree | f8429cbcbc849c559607d8b5d00dd5b05a6f4c5c /src/soc | |
| parent | 8e42bd1cbcf8edad69fac402b43cd8740c0ad870 (diff) | |
| download | coreboot-8e1a99546b2cb4e22ffbb7cfc045204bbe7eacd5.tar.xz | |
rockchip/rk3399: Change 933 DPLL to low jitter rate
This changes the 933 DPLL rate to 928 which has low jitter.
BRANCH=none
BUG=chrome-os-partner:57845
TEST=boot kevin and run
while true; do sleep 0.1; memtester 500K 1 > /dev/null; done
for several hours
Change-Id: I4d2a8871aaabe3b0a1a165c788af265c5f9e892c
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 54ebf8763bb8193c4b36a5e86f0c625b176d31a6
Original-Change-Id: Iaa12bf67527b6d0e809657c513b8d1c66af25174
Original-Signed-off-by: Derek Basehore <dbasehore@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/404550
Original-Reviewed-by: Douglas Anderson <dianders@chromium.org>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/17379
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/rockchip/rk3399/clock.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/soc/rockchip/rk3399/clock.c b/src/soc/rockchip/rk3399/clock.c index ced78b3ded..5acf90a0c9 100644 --- a/src/soc/rockchip/rk3399/clock.c +++ b/src/soc/rockchip/rk3399/clock.c @@ -558,7 +558,7 @@ void rkclk_configure_ddr(unsigned int hz) break; case 933*MHz: dpll_cfg = (struct pll_div) - {.refdiv = 3, .fbdiv = 350, .postdiv1 = 3, .postdiv2 = 1}; + {.refdiv = 1, .fbdiv = 116, .postdiv1 = 3, .postdiv2 = 1}; break; default: die("Unsupported SDRAM frequency, add to clock.c!"); |