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

mb/google/volteer/var/elemi: Tune i2c frequency 

Tuning i2c frequency for elemi
I2C0: 396.6 KHz
I2C1: 395.9 KHz
I2C5: 397.1 KHz

BUG=b:176794161
BRANCH=volteer
TEST=emerge-voleteer coreboot, and measure i2c clock.

Change-Id: I23b04a9b5ff8873d9de12e762e8e2786ef474ac0
Signed-off-by: Wisley Chen <wisley.chen@quantatw.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49116
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
This commit is contained in:
Wisley Chen 2021-01-05 21:53:41 +08:00 committed by Patrick Georgi
parent fbf6ae127a
commit 0363d6da2a
1 changed files with 19 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
src/mainboard/google/volteer/variants/elemi/overridetree.cb
View File

@ -36,9 +36,21 @@ chip soc/intel/tigerlake
}, },
.i2c[0] = { .i2c[0] = {
.speed = I2C_SPEED_FAST, .speed = I2C_SPEED_FAST,
.speed_config[0] = {
.speed = I2C_SPEED_FAST,
.scl_lcnt = 160,
.scl_hcnt = 75,
.sda_hold = 36,
},
}, },
.i2c[1] = { .i2c[1] = {
.speed = I2C_SPEED_FAST, .speed = I2C_SPEED_FAST,
.speed_config[0] = {
.speed = I2C_SPEED_FAST,
.scl_lcnt = 158,
.scl_hcnt = 75,
.sda_hold = 36,
},
}, },
.i2c[2] = { .i2c[2] = {
.speed = I2C_SPEED_FAST, .speed = I2C_SPEED_FAST,
@ -48,6 +60,13 @@ chip soc/intel/tigerlake
}, },
.i2c[5] = { .i2c[5] = {
.speed = I2C_SPEED_FAST, .speed = I2C_SPEED_FAST,
.speed_config[0] = {
.speed = I2C_SPEED_FAST,
.scl_lcnt = 158,
.scl_hcnt = 75,
.sda_hold = 36,
},
}, },
}" }"