Johnny Li has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/43058 )
Change subject: mb/google/volteer/variant/volteer: Turn I2C1 bus freq closer to 400 kHz for touch ......................................................................
mb/google/volteer/variant/volteer: Turn I2C1 bus freq closer to 400 kHz for touch
The current I2C1 bus frequency is 351 kHZ, which does not meet the spec. This change updates scl_lcnt, scl_hcnt, sda_hold value for I2C1 to bring the bus frequency closer to 400kHz.
BUG=b:153588771 TEST=Verified that I2C1 frequency is 390kHz.
Signed-off-by: Johnny Li johnny_li@wistron.corp-partner.google.com Change-Id: I593c3cfdb50e94e222e5c07176ee3c6fdd29e835 --- M src/mainboard/google/volteer/variants/volteer/overridetree.cb 1 file changed, 1 insertion(+), 1 deletion(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/58/43058/1
diff --git a/src/mainboard/google/volteer/variants/volteer/overridetree.cb b/src/mainboard/google/volteer/variants/volteer/overridetree.cb index 2f853e1..aee6954 100644 --- a/src/mainboard/google/volteer/variants/volteer/overridetree.cb +++ b/src/mainboard/google/volteer/variants/volteer/overridetree.cb @@ -190,7 +190,7 @@ .speed = I2C_SPEED_FAST, .speed_config[0] = { .speed = I2C_SPEED_FAST, - .scl_lcnt = 163, + .scl_lcnt = 162, .scl_hcnt = 75, .sda_hold = 36, },