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>
diff --git a/src/mainboard/google/skyrim/variants/winterhold/overridetree.cb b/src/mainboard/google/skyrim/variants/winterhold/overridetree.cb
index 71888c4..f0dfecc9 100644
--- a/src/mainboard/google/skyrim/variants/winterhold/overridetree.cb
+++ b/src/mainboard/google/skyrim/variants/winterhold/overridetree.cb
@@ -98,6 +98,16 @@
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"