Johnny Li has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/46143 )
Change subject: mb/google/volteer/variant/volteer: Turn I2C3 bus freq closer to 400 kHz for camera ......................................................................
mb/google/volteer/variant/volteer: Turn I2C3 bus freq closer to 400 kHz for camera
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: Ieacfe74cde84bfad3f5e6145045015a8ad9706ea --- M src/mainboard/google/volteer/variants/volteer2/overridetree.cb 1 file changed, 4 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/43/46143/1
diff --git a/src/mainboard/google/volteer/variants/volteer2/overridetree.cb b/src/mainboard/google/volteer/variants/volteer2/overridetree.cb index f0cf02d..ec02ec7 100644 --- a/src/mainboard/google/volteer/variants/volteer2/overridetree.cb +++ b/src/mainboard/google/volteer/variants/volteer2/overridetree.cb @@ -36,6 +36,10 @@ }, .i2c[3] = { .speed = I2C_SPEED_FAST, + .speed = I2C_SPEED_FAST, + .scl_lcnt = 153, + .scl_hcnt = 75, + .sda_hold = 36, }, .i2c[5] = { .speed = I2C_SPEED_FAST,