diff options
| author | Frank Chu <frank_chu@pegatron.corp-partner.google.com> | 2024-03-08 18:24:15 +0800 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2024-03-19 13:35:46 +0000 |
| commit | 19453ec7a63421e7dfe24e8ffec66aba16e7d177 (patch) | |
| tree | 0a177b989994c963629936453636c0dc3492b85a /src | |
| parent | b5a7bad724331195a397bb150804dbd2aa39ff2c (diff) | |
mb/google/nissa/var/glassway: Tune I2C timings for 400 kHz
Update touchpad and touchscreen I2C timing.
- Data hold time: 300ns - 900ns
BUG=b:328724191
BRANCH=firmware-nissa-15217.B
TEST=Check wave form and met the spec.
I2C1 (touchscreen) Hold time from 83.58ns to 413.87ns
I2C5 (touchpad) Hold time from 95.93ns to 425.27ns
Change-Id: I65fb1298f9e96ab0b63aba436f6a319f21b38925
Signed-off-by: Frank Chu <frank_chu@pegatron.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81136
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Shawn Ku <shawnku@google.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/mainboard/google/brya/variants/glassway/overridetree.cb | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/mainboard/google/brya/variants/glassway/overridetree.cb b/src/mainboard/google/brya/variants/glassway/overridetree.cb index 8c779d75f2..29629d44fc 100644 --- a/src/mainboard/google/brya/variants/glassway/overridetree.cb +++ b/src/mainboard/google/brya/variants/glassway/overridetree.cb @@ -129,7 +129,7 @@ chip soc/intel/alderlake .speed = I2C_SPEED_FAST, .scl_lcnt = 157, .scl_hcnt = 79, - .sda_hold = 7, + .sda_hold = 40, } }, .i2c[2] = { @@ -156,7 +156,7 @@ chip soc/intel/alderlake .speed = I2C_SPEED_FAST, .scl_lcnt = 158, .scl_hcnt = 79, - .sda_hold = 7, + .sda_hold = 40, } }, }" |