diff options
| author | Joey Peng <joey.peng@lcfc.corp-partner.google.com> | 2022-01-20 18:50:43 +0800 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-01-24 17:09:07 +0000 |
| commit | 4337349883bd5e8cf92e7bd172e54a92f9a4c6fd (patch) | |
| tree | 035397d7b8ac2049ac3fb8040c33d7af1e7869a7 /src/mainboard | |
| parent | 83c30a9cf18ad29b96dc819ad9b639fdb7f82c15 (diff) | |
mb/google/brya/var/{taeko, taeko4es}: Modify touchpad i2c signal
Modify i2c signal to meet touchpad vendor spec.
Please see issue tracker for more details.
BUG=b:215487482
TEST=emerge-brya coreboot and check measured waveform in spec
Signed-off-by: Joey Peng <joey.peng@lcfc.corp-partner.google.com>
Change-Id: Ib3797d4e232654ada97092d9f2742ca040d0f0e4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61271
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'src/mainboard')
| -rw-r--r-- | src/mainboard/google/brya/variants/taeko/overridetree.cb | 10 | ||||
| -rw-r--r-- | src/mainboard/google/brya/variants/taeko4es/overridetree.cb | 10 |
2 files changed, 18 insertions, 2 deletions
diff --git a/src/mainboard/google/brya/variants/taeko/overridetree.cb b/src/mainboard/google/brya/variants/taeko/overridetree.cb index c99777d907..f11da345cb 100644 --- a/src/mainboard/google/brya/variants/taeko/overridetree.cb +++ b/src/mainboard/google/brya/variants/taeko/overridetree.cb @@ -93,7 +93,15 @@ chip soc/intel/alderlake .speed = I2C_SPEED_FAST, }, .i2c[5] = { - .speed = I2C_SPEED_FAST, + .rise_time_ns = 650, + .fall_time_ns = 400, + .data_hold_time_ns = 500, + .speed_config[0] = { + .speed = I2C_SPEED_FAST, + .scl_lcnt = 160, + .scl_hcnt = 70, + .sda_hold = 40, + } }, }" # I2C Port Config diff --git a/src/mainboard/google/brya/variants/taeko4es/overridetree.cb b/src/mainboard/google/brya/variants/taeko4es/overridetree.cb index 7609ba6d4d..de8b42fec1 100644 --- a/src/mainboard/google/brya/variants/taeko4es/overridetree.cb +++ b/src/mainboard/google/brya/variants/taeko4es/overridetree.cb @@ -89,7 +89,15 @@ chip soc/intel/alderlake .speed = I2C_SPEED_FAST, }, .i2c[5] = { - .speed = I2C_SPEED_FAST, + .rise_time_ns = 650, + .fall_time_ns = 400, + .data_hold_time_ns = 500, + .speed_config[0] = { + .speed = I2C_SPEED_FAST, + .scl_lcnt = 160, + .scl_hcnt = 70, + .sda_hold = 40, + } }, }" # I2C Port Config |