GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

mb/google/zork: Adjust Dirinboz I2C values 

BUG=b:164757545
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: Icb27ff8a4960caaebc542ee4e507f1611da5a77e
Signed-off-by: Kevin Chiu <kevin.chiu@quantatw.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44515
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Kevin Chiu 2020-08-17 15:08:22 +08:00 committed by Patrick Georgi
parent 7f94b405be
commit 39fd923b0b
1 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/mainboard/google/zork/variants/dirinboz/overridetree.cb
View File

@ -1,5 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-or-later
chip soc/amd/picasso
# Start : OPN Performance Configuration
@ -18,16 +17,19 @@ chip soc/amd/picasso
# End : OPN Performance Configuration
# I2C2 for touchscreen and trackpad
# I2C2 for touchscreen and trackpad
register "i2c[2]" = "{
.speed = I2C_SPEED_FAST,
.rise_time_ns = 18, /* 0 to 2.31 (3.3 * .7) */
.fall_time_ns = 57, /* 2.31 to 0 */
}"
# 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 */
.early_init = true,
}"