diff options
| author | Wisley Chen <wisley.chen@quantatw.com> | 2020-04-24 19:04:09 +0800 |
|---|---|---|
| committer | Tim Wawrzynczak <twawrzynczak@chromium.org> | 2020-04-25 19:27:58 +0000 |
| commit | fadd6353dbe72bec79888b37385df7f5877ddc1a (patch) | |
| tree | 07d45b2f57d35e16b4a62aaef195e12022cc2962 /src/mainboard | |
| parent | b45912f453b52bfc01e66dc070fb33fad236d816 (diff) | |
mb/google/hatch/var/jinlon: Tune i2c frequency under 400 KHz
Tuning i2c frequency for jinlon:
I2C0: 392.7 KHz
I2C1: 390 KHz
I2C3: unused
I2C4: 388.8 KHz
BUG=b:154900217
BRANCH=hatch
TEST=emerge-hatch coreboot chromeos-bootimage, and measured with
scope
Change-Id: I9b186193f34027d03dd349cf1e29bb266b167383
Signed-off-by: Wisley Chen <wisley.chen@quantatw.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40688
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'src/mainboard')
| -rw-r--r-- | src/mainboard/google/hatch/variants/jinlon/overridetree.cb | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/mainboard/google/hatch/variants/jinlon/overridetree.cb b/src/mainboard/google/hatch/variants/jinlon/overridetree.cb index 7cf434dd91..546267011d 100644 --- a/src/mainboard/google/hatch/variants/jinlon/overridetree.cb +++ b/src/mainboard/google/hatch/variants/jinlon/overridetree.cb @@ -46,15 +46,18 @@ chip soc/intel/cannonlake }, .i2c[0] = { .speed = I2C_SPEED_FAST, + .rise_time_ns = 30, + .fall_time_ns = 15, }, .i2c[1] = { .speed = I2C_SPEED_FAST, - }, - .i2c[3] = { - .speed = I2C_SPEED_FAST, + .rise_time_ns = 20, + .fall_time_ns = 25, }, .i2c[4] = { .speed = I2C_SPEED_FAST, + .rise_time_ns = 40, + .fall_time_ns = 60, }, }" |