Johnny Li has uploaded this change for review.
mb/google/volteer/variants/volteer2: Tune I2C3 camera bus freq 400 kHz
The current I2C3 bus frequency is 341 kHZ, which does not meet the spec.
This change updates scl_lcnt, scl_hcnt, sda_hold value for I2C3 to bring
the bus frequency closer to 400kHz.
BUG=b:153588771
TEST=Verified that I2C3 frequency is 394kHz.
Signed-off-by: Johnny Li <johnny_li@wistron.corp-partner.google.com>
Change-Id: Ie1ef95bb39d71fbb113120a0ec88305bc23e7ab9
---
M src/mainboard/google/volteer/variants/volteer2/overridetree.cb
1 file changed, 6 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/25/47225/1
diff --git a/src/mainboard/google/volteer/variants/volteer2/overridetree.cb b/src/mainboard/google/volteer/variants/volteer2/overridetree.cb
index bb4db53..1cb0b52 100644
--- a/src/mainboard/google/volteer/variants/volteer2/overridetree.cb
+++ b/src/mainboard/google/volteer/variants/volteer2/overridetree.cb
@@ -39,6 +39,12 @@
},
.i2c[3] = {
.speed = I2C_SPEED_FAST,
+ .speed_config[0] = {
+ .speed = I2C_SPEED_FAST,
+ .scl_lcnt = 153,
+ .scl_hcnt = 75,
+ .sda_hold = 36,
+ },
},
.i2c[5] = {
.speed = I2C_SPEED_FAST,
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