From fadd6353dbe72bec79888b37385df7f5877ddc1a Mon Sep 17 00:00:00 2001
From: Wisley Chen <wisley.chen@quantatw.com>
Date: Fri, 24 Apr 2020 19:04:09 +0800
Subject: [PATCH] mb/google/hatch/var/jinlon: Tune i2c frequency under 400 KHz

Tuning i2c frequency for jinlon:
I2C0: 392.7 KHz
I2C1: 390 KHz
I2C3: unused
I2C4: 388.8 KHz

BUG=b:154900217
BRANCH=hatch
TEST=emerge-hatch coreboot chromeos-bootimage, and measured with
scope

Change-Id: I9b186193f34027d03dd349cf1e29bb266b167383
Signed-off-by: Wisley Chen <wisley.chen@quantatw.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40688
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
---
 .../google/hatch/variants/jinlon/overridetree.cb         | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/mainboard/google/hatch/variants/jinlon/overridetree.cb b/src/mainboard/google/hatch/variants/jinlon/overridetree.cb
index 7cf434dd91..546267011d 100644
--- a/src/mainboard/google/hatch/variants/jinlon/overridetree.cb
+++ b/src/mainboard/google/hatch/variants/jinlon/overridetree.cb
@@ -46,15 +46,18 @@ chip soc/intel/cannonlake
 		},
 		.i2c[0] = {
 			.speed = I2C_SPEED_FAST,
+			.rise_time_ns = 30,
+			.fall_time_ns = 15,
 		},
 		.i2c[1] = {
 			.speed = I2C_SPEED_FAST,
-		},
-		.i2c[3] = {
-			.speed = I2C_SPEED_FAST,
+			.rise_time_ns = 20,
+			.fall_time_ns = 25,
 		},
 		.i2c[4] = {
 			.speed = I2C_SPEED_FAST,
+			.rise_time_ns = 40,
+			.fall_time_ns = 60,
 		},
 	}"