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| author | Johnny Li <johnny_li@wistron.corp-partner.google.com> | 2020-11-05 13:13:44 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-11-09 07:23:52 +0000 |
| commit | 04582e900102357056aa218e5a413edb52409e87 (patch) | |
| tree | 1047e460f8529381c33325fbc79d686ffb7d6597 | |
| parent | e569e3e248f7df389d4b86ebc1c145d6781de45e (diff) | |
| download | coreboot-04582e900102357056aa218e5a413edb52409e87.tar.xz | |
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
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47225
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Caveh Jalali <caveh@chromium.org>
| -rw-r--r-- | src/mainboard/google/volteer/variants/volteer2/overridetree.cb | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mainboard/google/volteer/variants/volteer2/overridetree.cb b/src/mainboard/google/volteer/variants/volteer2/overridetree.cb index bb4db53e32..1cb0b52b03 100644 --- a/src/mainboard/google/volteer/variants/volteer2/overridetree.cb +++ b/src/mainboard/google/volteer/variants/volteer2/overridetree.cb @@ -39,6 +39,12 @@ chip soc/intel/tigerlake }, .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, |