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mb/google/zork: Adjust Gumboz H1 I2C CLK

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Adjust H1 I2C CLK:
404kHz -> 391 kHz

BUG=b:179753353
BRANCH=zork
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: Iedd47dd6fc4f7ac7f0aac480d63ddbdf85a84ec2
Signed-off-by: Kevin Chiu <kevin.chiu@quantatw.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50994
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kangheui Won <khwon@chromium.org>
This commit is contained in:
Kevin Chiu 2021-02-22 11:31:57 +08:00 • committed by Felix Held
commit dfd52bd466
1 changed files with 2 additions and 2 deletions
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4
src/mainboard/google/zork/variants/gumboz/overridetree.cb
View file

@ -70,8 +70,8 @@ chip soc/amd/picasso
# 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,
}"