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mb/goog/hatch/var/dratini: Tune i2c frequency to 400 KHz 

Tuning i2c frequency for dratini:
I2C0: 396 KHz
I2C1: 398 KHz
I2C3: unused
I2C4: 394 KHz

BUG=b:145891557
BRANCH=hatch
TEST=emerge-hatch coreboot chromeos-bootimage

Change-Id: I1431554fbce5f3ce113ef1a934e39448e7ba321c
Signed-off-by: Wisley Chen <wisley.chen@quantatw.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37605
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Wisley Chen 2019-12-09 19:14:13 +08:00 committed by Patrick Georgi
parent 106abb82fe
commit 42174235ba
1 changed files with 6 additions and 3 deletions
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9
src/mainboard/google/hatch/variants/dratini/overridetree.cb
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@ -35,15 +35,18 @@ chip soc/intel/cannonlake
},
.i2c[0] = {
.speed = I2C_SPEED_FAST,
.rise_time_ns = 50,
.fall_time_ns = 15,
},
.i2c[1] = {
.speed = I2C_SPEED_FAST,
},
.i2c[3] = {
.speed = I2C_SPEED_FAST,
.rise_time_ns = 60,
.fall_time_ns = 25,
},
.i2c[4] = {
.speed = I2C_SPEED_FAST,
.rise_time_ns = 60,
.fall_time_ns = 60,
},
}"