diff options
| author | Jamie Chen <jamie_chen@compal.corp-partner.google.com> | 2023-04-13 14:41:58 +0800 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2023-04-18 13:04:35 +0000 |
| commit | 60b22c4c57d28465adf4e8de331b5207f025f5a4 (patch) | |
| tree | afe22c383ebf0b91874d4b2989779a206a668294 /src/mainboard/google/brya | |
| parent | b68817d196e09473d30abe0085624c6f7c976a40 (diff) | |
mb/google/brya/var/omnigul: Adjust I2Cs CLK to be around 400 kHz
Need to tune I2C bus 0/1/3/5 clock frequency under the 400kHz for
audio, TPM, touchscreen, and touchpad.
Tuning i2c frequency for omnigul
I2C0 - Audio CLK : 293.7khz
I2C1 - TPM CLK : 388.8khz
I2C3 - Touch Screen CLK : 294.8khz
I2C5 - Touch Pad CLK : 389.2khz
BUG=b:275061994
BRANCH=firmware-brya-14505.B
TEST=emerge-brya coreboot, and measure i2c clock.
Change-Id: I7c4fdf0e003318a69b870b487a60accefbc0ffed
Signed-off-by: Jamie Chen <jamie_chen@compal.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74393
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Derek Huang <derekhuang@google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Diffstat (limited to 'src/mainboard/google/brya')
| -rw-r--r-- | src/mainboard/google/brya/variants/omnigul/overridetree.cb | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/mainboard/google/brya/variants/omnigul/overridetree.cb b/src/mainboard/google/brya/variants/omnigul/overridetree.cb index 6ba5ba0b3c..760ee82fcd 100644 --- a/src/mainboard/google/brya/variants/omnigul/overridetree.cb +++ b/src/mainboard/google/brya/variants/omnigul/overridetree.cb @@ -24,16 +24,28 @@ chip soc/intel/alderlake register "common_soc_config" = "{ .i2c[0] = { .speed = I2C_SPEED_FAST, + .rise_time_ns = 650, + .fall_time_ns = 400, + .data_hold_time_ns = 50, }, .i2c[1] = { .early_init = 1, .speed = I2C_SPEED_FAST, + .rise_time_ns = 600, + .fall_time_ns = 400, + .data_hold_time_ns = 50, }, .i2c[3] = { .speed = I2C_SPEED_FAST, + .rise_time_ns = 600, + .fall_time_ns = 400, + .data_hold_time_ns = 50, }, .i2c[5] = { .speed = I2C_SPEED_FAST, + .rise_time_ns = 650, + .fall_time_ns = 400, + .data_hold_time_ns = 50, }, }" |