From fb2f356d89de19994214dbe01ef7c02e02f24be0 Mon Sep 17 00:00:00 2001 From: Kane Chen Date: Wed, 23 Sep 2020 14:26:13 +0800 Subject: mb/google/zork: Modify I2C3 CLK for Woomax to meet I2C specification Modify I2C3 setting to follow I2C specification(lower than 400kHz). Original setting: .rise_time_ns = 125 .fall_time_ns = 37 Change to: .rise_time_ns = 110 .fall_time_ns = 34 BUG=b:169207742 BRANCH=None TEST=emerge-zork coreboot chromeos-bootimage Signed-off-by: Kane Chen Change-Id: I0f0b791c3e701ebf6b336a8cb259eeb74c46af5a Reviewed-on: https://review.coreboot.org/c/coreboot/+/45644 Tested-by: build bot (Jenkins) Reviewed-by: Angel Pons Reviewed-by: Aaron Durbin --- src/mainboard/google/zork/variants/woomax/overridetree.cb | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src/mainboard') diff --git a/src/mainboard/google/zork/variants/woomax/overridetree.cb b/src/mainboard/google/zork/variants/woomax/overridetree.cb index d1c5507feb..8d94a97277 100644 --- a/src/mainboard/google/zork/variants/woomax/overridetree.cb +++ b/src/mainboard/google/zork/variants/woomax/overridetree.cb @@ -60,8 +60,8 @@ chip soc/amd/picasso # Enable I2C3 for H1 400kHz register "i2c[3]" = "{ .speed = I2C_SPEED_FAST, - .rise_time_ns = 125, /* 0 to 1.26v (1.8 * .7) */ - .fall_time_ns = 37, /* 1.26v to 0 */ + .rise_time_ns = 110, /* 0 to 1.26v (1.8 * .7) */ + .fall_time_ns = 34, /* 1.26v to 0 */ .early_init = true, }" -- cgit v1.2.3