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mb/google/kahlee/treeya: Set touchpad hold time to 400ns 

According to SI team request, need to tune I2C bus 2 data
hold time more than 300ns

BUG=b:144736027
TEST=build firmware and measure I2C bus 2 data hold time

Signed-off-by: Peichao Wang <peichao.wang@bitland.corp-partner.google.com>
Change-Id: Idc58a595c77eba8544f27682a284be6aac5dbe25
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36945
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Peichao Wang 2019-11-19 11:42:42 +08:00 committed by Patrick Georgi
parent 1bdfe8c280
commit d0c52b72f3
1 changed files with 1 additions and 0 deletions
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src/mainboard/google/kahlee/variants/treeya/devicetree.cb
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@ -44,6 +44,7 @@ chip soc/amd/stoneyridge
.speed = I2C_SPEED_FAST, .speed = I2C_SPEED_FAST,
.rise_time_ns = 3, .rise_time_ns = 3,
.fall_time_ns = 2, .fall_time_ns = 2,
.data_hold_time_ns = 400,
}" }"
# Enable I2C3 for touchscreen at 400kHz # Enable I2C3 for touchscreen at 400kHz