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>
diff --git a/src/mainboard/google/volteer/variants/elemi/overridetree.cb b/src/mainboard/google/volteer/variants/elemi/overridetree.cb
index af58b81..c30dce3 100644
--- a/src/mainboard/google/volteer/variants/elemi/overridetree.cb
+++ b/src/mainboard/google/volteer/variants/elemi/overridetree.cb
@@ -36,9 +36,21 @@
},
.i2c[0] = {
.speed = I2C_SPEED_FAST,
+ .speed_config[0] = {
+ .speed = I2C_SPEED_FAST,
+ .scl_lcnt = 160,
+ .scl_hcnt = 75,
+ .sda_hold = 36,
+ },
},
.i2c[1] = {
.speed = I2C_SPEED_FAST,
+ .speed_config[0] = {
+ .speed = I2C_SPEED_FAST,
+ .scl_lcnt = 158,
+ .scl_hcnt = 75,
+ .sda_hold = 36,
+ },
},
.i2c[2] = {
.speed = I2C_SPEED_FAST,
@@ -48,6 +60,13 @@
},
.i2c[5] = {
.speed = I2C_SPEED_FAST,
+ .speed_config[0] = {
+ .speed = I2C_SPEED_FAST,
+ .scl_lcnt = 158,
+ .scl_hcnt = 75,
+ .sda_hold = 36,
+ },
+
},
}"