diff options
| author | Seunghwan Kim <sh_.kim@samsung.corp-partner.google.com> | 2021-11-05 09:58:51 +0900 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2021-11-09 18:40:59 +0000 |
| commit | 8fbfc080fcb6f61b21b1870c87fbe855bdd138e9 (patch) | |
| tree | 833263e43d6cffa63b440d40987edf82d2fa46ee /src/mainboard | |
| parent | e9654a857f3b9a5ccfa6870d4da1a7c53c80dede (diff) | |
mb/google/dedede/var/bugzzy: Adjust I2C speed
This change adjusts all I2C speed to lower then 400KHz. The rise_time_ns
and fall_time_ns values for each port are capured by a scope.
BUG=None
BRANCH=dedede
TEST=built and verified adjusted I2C speed < 400KHz
Signed-off-by: Seunghwan Kim <sh_.kim@samsung.corp-partner.google.com>
Change-Id: I9504608dd8d9a5f5a3848ef34691557942c21023
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58965
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Diffstat (limited to 'src/mainboard')
| -rw-r--r-- | src/mainboard/google/dedede/variants/bugzzy/overridetree.cb | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mainboard/google/dedede/variants/bugzzy/overridetree.cb b/src/mainboard/google/dedede/variants/bugzzy/overridetree.cb index 947fa4712e..e1318a8e46 100644 --- a/src/mainboard/google/dedede/variants/bugzzy/overridetree.cb +++ b/src/mainboard/google/dedede/variants/bugzzy/overridetree.cb @@ -63,12 +63,18 @@ chip soc/intel/jasperlake }, .i2c[1] = { .speed = I2C_SPEED_FAST, + .rise_time_ns = 133, + .fall_time_ns = 29, }, .i2c[2] = { .speed = I2C_SPEED_FAST, + .rise_time_ns = 227, + .fall_time_ns = 9, }, .i2c[3] = { .speed = I2C_SPEED_FAST, + .rise_time_ns = 91, + .fall_time_ns = 2, }, .i2c[4] = { .speed = I2C_SPEED_FAST, |