mb/google/zork: Adjust Dirinboz H1 I2C CLK
Adjust H1 I2C CLK:
404kHz -> 391 kHz
BUG=b:178656936
BRANCH=master
TEST=1. emerge-zork coreboot chromeos-bootimage
2. power on proto board successfully
3. measure i2c freq by scope is close to 400kHz
Change-Id: I9067db9fc7a4d6aa2ce33b86ba6a611dfd5d7838
Signed-off-by: Kevin Chiu <kevin.chiu@quantatw.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50284
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Kangheui Won <khwon@chromium.org>
diff --git a/src/mainboard/google/zork/variants/dirinboz/overridetree.cb b/src/mainboard/google/zork/variants/dirinboz/overridetree.cb
index 554cdea..0e50d2f 100644
--- a/src/mainboard/google/zork/variants/dirinboz/overridetree.cb
+++ b/src/mainboard/google/zork/variants/dirinboz/overridetree.cb
@@ -70,8 +70,8 @@
# I2C3 for H1
register "i2c[3]" = "{
.speed = I2C_SPEED_FAST,
- .rise_time_ns = 184, /* 0 to 1.26v (1.8 * .7) */
- .fall_time_ns = 42, /* 1.26v to 0 */
+ .rise_time_ns = 98, /* 0 to 1.26v (1.8 * .7) */
+ .fall_time_ns = 17, /* 1.26v to 0 */
.early_init = true,
}"