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mb/google/dedede/var/storo: Modify I2C times for touchpad 

Configure I2C rise/fall time in device tree to ensure I2C
CLK runs accurately (380<frequency<400 kHz).

Measured touchpad I2C frequency is 394 kHz

BUG=b:189740533
BRANCH=dedede
TEST=Build bios and make sure frequency meets specification.

Change-Id: Ibc0504a5be6fe9237b8b30783c659a761d10561a
Signed-off-by: Zanxi Chen <chenzanxi@huaqin.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55109
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
This commit is contained in:
Zanxi Chen 2021-05-31 20:13:21 +08:00 committed by Werner Zeh
parent dffcd4ed68
commit 542a2d908d
1 changed files with 2 additions and 2 deletions
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4
src/mainboard/google/dedede/variants/storo/overridetree.cb
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@ -26,8 +26,8 @@ chip soc/intel/jasperlake
}, },
.i2c[0] = { .i2c[0] = {
.speed = I2C_SPEED_FAST, .speed = I2C_SPEED_FAST,
.rise_time_ns = 125, .rise_time_ns = 260,
.fall_time_ns = 19, .fall_time_ns = 50,
}, },
.i2c[1] = { .i2c[1] = {
.speed = I2C_SPEED_FAST, .speed = I2C_SPEED_FAST,