From 6c1bdc8939e5210d5ef0d4b07896e77ce9548983 Mon Sep 17 00:00:00 2001 From: Tao Xia Date: Fri, 2 Jul 2021 11:30:46 +0800 Subject: [PATCH] mb/google/dedede/var/sasukette: Configure I2C times for touchpad Configure I2C high / low time in the device tree to ensure I2C CLK runs accurately between 380 kHz and 400 kHz. Measured I2C frequency just as below after tuning: touchpad:390.4 kHz BUG=b:192601250 BRANCH=dedede TEST=Build and check after tuning I2C clock is between 380 kHz and 400 kHz Signed-off-by: Tao Xia Change-Id: Ibe1603a48a3e841b6a50aa0c703697ec615b2854 Reviewed-on: https://review.coreboot.org/c/coreboot/+/56016 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel Reviewed-by: Karthik Ramasubramanian --- .../google/dedede/variants/sasukette/overridetree.cb | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/mainboard/google/dedede/variants/sasukette/overridetree.cb b/src/mainboard/google/dedede/variants/sasukette/overridetree.cb index a39b9d1a7d..776ba8af36 100644 --- a/src/mainboard/google/dedede/variants/sasukette/overridetree.cb +++ b/src/mainboard/google/dedede/variants/sasukette/overridetree.cb @@ -23,8 +23,8 @@ chip soc/intel/jasperlake .speed = I2C_SPEED_FAST, .speed_config[0] = { .speed = I2C_SPEED_FAST, - .scl_lcnt = 185, - .scl_hcnt = 95, + .scl_lcnt = 180, + .scl_hcnt = 90, .sda_hold = 40, } },