diff options
| author | Dtrain Hsu <dtrain_hsu@compal.corp-partner.google.com> | 2023-01-12 11:31:37 +0800 |
|---|---|---|
| committer | Martin L Roth <gaumless@gmail.com> | 2023-01-15 02:05:15 +0000 |
| commit | 429df8adbe91d0cf77369a3070b3d206d50a8890 (patch) | |
| tree | 52190f76bb2c30c07f5af359df9eeda4ab9cc740 | |
| parent | a4f85470f76de4892f3fe0dcd6eecfd84a841df5 (diff) | |
mb/google/skyrim/var/winterhold: Update I2C bus0 settings
Update settings for touchpad I2C frequency and data hold time.
I2C frequency and data hold time need to meet touchpad spec.
- I2C frequency: 380kHz - 400kHz
- Data hold time: 0.3us - 0.9us
BUG=b:262320419
TEST=On winterhold, touchpad i2c measurement from vendor,
Frequencies: 395 kHz, Data hold time: 0.66 us
Change-Id: I40fa6f9e88656d4ec02a4120f75a2a9413b5abaa
Signed-off-by: Dtrain Hsu <dtrain_hsu@compal.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71853
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
| -rw-r--r-- | src/mainboard/google/skyrim/variants/winterhold/overridetree.cb | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/mainboard/google/skyrim/variants/winterhold/overridetree.cb b/src/mainboard/google/skyrim/variants/winterhold/overridetree.cb index 71888c4b0d..f0dfecc97a 100644 --- a/src/mainboard/google/skyrim/variants/winterhold/overridetree.cb +++ b/src/mainboard/google/skyrim/variants/winterhold/overridetree.cb @@ -98,6 +98,16 @@ chip soc/amd/mendocino register "stt_c_apu_F" = "0xE866" register "stt_skin_temp_apu_F" = "0x3200" + register "i2c[0]" = "{ + .speed = I2C_SPEED_FAST, + .speed_config[0] = { + .speed = I2C_SPEED_FAST, + .scl_hcnt = 107, + .scl_lcnt = 230, + .sda_hold = 100 + } + }" + device domain 0 on register "dxio_tx_vboost_enable" = "1" |