From 8fbfc080fcb6f61b21b1870c87fbe855bdd138e9 Mon Sep 17 00:00:00 2001
From: Seunghwan Kim <sh_.kim@samsung.corp-partner.google.com>
Date: Fri, 5 Nov 2021 09:58:51 +0900
Subject: [PATCH] mb/google/dedede/var/bugzzy: Adjust I2C speed

This change adjusts all I2C speed to lower then 400KHz. The rise_time_ns
and fall_time_ns values for each port are capured by a scope.

BUG=None
BRANCH=dedede
TEST=built and verified adjusted I2C speed < 400KHz

Signed-off-by: Seunghwan Kim <sh_.kim@samsung.corp-partner.google.com>
Change-Id: I9504608dd8d9a5f5a3848ef34691557942c21023
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58965
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
---
 src/mainboard/google/dedede/variants/bugzzy/overridetree.cb | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/mainboard/google/dedede/variants/bugzzy/overridetree.cb b/src/mainboard/google/dedede/variants/bugzzy/overridetree.cb
index 947fa4712e..e1318a8e46 100644
--- a/src/mainboard/google/dedede/variants/bugzzy/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/bugzzy/overridetree.cb
@@ -63,12 +63,18 @@ chip soc/intel/jasperlake
 		},
 		.i2c[1] = {
 			.speed = I2C_SPEED_FAST,
+			.rise_time_ns = 133,
+			.fall_time_ns = 29,
 		},
 		.i2c[2] = {
 			.speed = I2C_SPEED_FAST,
+			.rise_time_ns = 227,
+			.fall_time_ns = 9,
 		},
 		.i2c[3] = {
 			.speed = I2C_SPEED_FAST,
+			.rise_time_ns = 91,
+			.fall_time_ns = 2,
 		},
 		.i2c[4] = {
 			.speed = I2C_SPEED_FAST,