From 0358f7dadaac6c3c71c5d8a43c737d3b0a59134a Mon Sep 17 00:00:00 2001 From: "peichao.wang" Date: Tue, 21 Jul 2020 09:36:11 +0800 Subject: mb/google/vilboz: Tune I2C bus 3 clock Tune I2C bus3 frequency and insure it meets I2C spec. BUG=b:161650117 TEST=flash coreboot to the DUT and actual measured I2C bus3 make sure it meet Spec. Signed-off-by: Peichao Wang Change-Id: Ifa9f0bce723f55a12fd2313788c995f8326e3e7d Reviewed-on: https://review.coreboot.org/c/coreboot/+/43661 Reviewed-by: Aaron Durbin Reviewed-by: Furquan Shaikh Tested-by: build bot (Jenkins) --- src/mainboard/google/zork/variants/vilboz/overridetree.cb | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src') diff --git a/src/mainboard/google/zork/variants/vilboz/overridetree.cb b/src/mainboard/google/zork/variants/vilboz/overridetree.cb index 0f374cb1ab..eb5c2dd41a 100644 --- a/src/mainboard/google/zork/variants/vilboz/overridetree.cb +++ b/src/mainboard/google/zork/variants/vilboz/overridetree.cb @@ -28,8 +28,8 @@ chip soc/amd/picasso # I2C3 for H1 register "i2c[3]" = "{ .speed = I2C_SPEED_FAST, - .rise_time_ns = 184, /* 0 to 1.26v (1.8 * .7) */ - .fall_time_ns = 42, /* 1.26v to 0 */ + .rise_time_ns = 110, + .fall_time_ns = 5, .early_init = true, }" -- cgit v1.2.3