From 0363d6da2a674b3ec118b777274abb198ae79149 Mon Sep 17 00:00:00 2001 From: Wisley Chen Date: Tue, 5 Jan 2021 21:53:41 +0800 Subject: [PATCH] mb/google/volteer/var/elemi: Tune i2c frequency Tuning i2c frequency for elemi I2C0: 396.6 KHz I2C1: 395.9 KHz I2C5: 397.1 KHz BUG=b:176794161 BRANCH=volteer TEST=emerge-voleteer coreboot, and measure i2c clock. Change-Id: I23b04a9b5ff8873d9de12e762e8e2786ef474ac0 Signed-off-by: Wisley Chen Reviewed-on: https://review.coreboot.org/c/coreboot/+/49116 Tested-by: build bot (Jenkins) Reviewed-by: Tim Wawrzynczak --- .../volteer/variants/elemi/overridetree.cb | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/src/mainboard/google/volteer/variants/elemi/overridetree.cb b/src/mainboard/google/volteer/variants/elemi/overridetree.cb index af58b81701..c30dce39b4 100644 --- a/src/mainboard/google/volteer/variants/elemi/overridetree.cb +++ b/src/mainboard/google/volteer/variants/elemi/overridetree.cb @@ -36,9 +36,21 @@ chip soc/intel/tigerlake }, .i2c[0] = { .speed = I2C_SPEED_FAST, + .speed_config[0] = { + .speed = I2C_SPEED_FAST, + .scl_lcnt = 160, + .scl_hcnt = 75, + .sda_hold = 36, + }, }, .i2c[1] = { .speed = I2C_SPEED_FAST, + .speed_config[0] = { + .speed = I2C_SPEED_FAST, + .scl_lcnt = 158, + .scl_hcnt = 75, + .sda_hold = 36, + }, }, .i2c[2] = { .speed = I2C_SPEED_FAST, @@ -48,6 +60,13 @@ chip soc/intel/tigerlake }, .i2c[5] = { .speed = I2C_SPEED_FAST, + .speed_config[0] = { + .speed = I2C_SPEED_FAST, + .scl_lcnt = 158, + .scl_hcnt = 75, + .sda_hold = 36, + }, + }, }"