Patrick Georgi has submitted this change. ( https://review.coreboot.org/c/coreboot/+/36945 )
Change subject: mb/google/kahlee/treeya: Set touchpad hold time to 400ns ......................................................................
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 --- M src/mainboard/google/kahlee/variants/treeya/devicetree.cb 1 file changed, 1 insertion(+), 0 deletions(-)
Approvals: build bot (Jenkins): Verified Patrick Georgi: Looks good to me, approved Martin Roth: Looks good to me, approved Peichao Li: Looks good to me, but someone else must approve
diff --git a/src/mainboard/google/kahlee/variants/treeya/devicetree.cb b/src/mainboard/google/kahlee/variants/treeya/devicetree.cb index e8477ee..e35f00c 100644 --- a/src/mainboard/google/kahlee/variants/treeya/devicetree.cb +++ b/src/mainboard/google/kahlee/variants/treeya/devicetree.cb @@ -44,6 +44,7 @@ .speed = I2C_SPEED_FAST, .rise_time_ns = 3, .fall_time_ns = 2, + .data_hold_time_ns = 400, }"
# Enable I2C3 for touchscreen at 400kHz