diff options
| author | Mary Ruthven <mruthven@chromium.org> | 2016-06-24 14:24:23 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-06-27 17:13:51 -0700 |
| commit | e84a71fe67c08dd3d1777c0cd22fd1e35ea1d7e0 (patch) | |
| tree | 26369c91f55094cfc8d655e3187871715e029e16 | |
| parent | 9a644c429af9f299445962892666685233cb0a1b (diff) | |
| download | chrome-ec-e84a71fe67c08dd3d1777c0cd22fd1e35ea1d7e0.tar.gz | |
cr50: enable highsec jittery clock
The highsec jittery clock was breaking the USB peripheral, because it
would use bank values that mapped to frequencies less than 15MHz. This
change modifies stepx16 to keep the bankvalues mapped to frequencies
above 18MHz to ensure the USB peripheral can work with the high
security jittery clock.
BUG=chrome-os-partner:53952
BRANCH=none
TEST=sudo flashrom -p raiden_debug_spi:target=AP -r test_img.bin
Change-Id: If8b45583f2cd9272b6d1e79a06556724c25d6495
Signed-off-by: Mary Ruthven <mruthven@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/356192
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
| -rw-r--r-- | board/cr50/board.c | 3 | ||||
| -rw-r--r-- | chip/g/jitter.c | 2 |
2 files changed, 2 insertions, 3 deletions
diff --git a/board/cr50/board.c b/board/cr50/board.c index 766d971491..3910af7159 100644 --- a/board/cr50/board.c +++ b/board/cr50/board.c @@ -130,8 +130,7 @@ static void board_init(void) init_timers(); init_interrupts(); init_trng(); - /* TODO(crosbug.com/p/53952): enable jittery clock */ - /* init_jittery_clock(1); */ + init_jittery_clock(1); init_runlevel(PERMISSION_MEDIUM); /* Initialize NvMem partitions */ nvmem_init(); diff --git a/chip/g/jitter.c b/chip/g/jitter.c index 35bf8142c3..b0686bc0bf 100644 --- a/chip/g/jitter.c +++ b/chip/g/jitter.c @@ -27,7 +27,7 @@ void init_jittery_clock(int highsec) int bank; if (highsec) - stepx16 = 0xff - trimfast; + stepx16 = (delta * 7) >> 1; else stepx16 = 2 * (trim48 - trimfast); |