From df3cbddb5825023d7788365f52c0c24ecc873b1b Mon Sep 17 00:00:00 2001
From: Johnny Li <johnny_li@wistron.corp-partner.google.com>
Date: Fri, 13 Nov 2020 16:30:31 +0800
Subject: [PATCH] mb/google/volteer/variants/volteer2: Tune Volteer2 I2C2 bus
 frequency

The current I2C2 bus frequency is 344 kHZ, which does not meet the spec. This change updates scl_lcnt, scl_hcnt, sda_hold value for I2C2 to bring
the bus frequency closer to 400 kHz.

BUG=b:153588771
TEST=Verified that I2C2 frequency is 380 kHz.

Signed-off-by: Johnny Li <johnny_li@wistron.corp-partner.google.com>
Change-Id: I96fa5ed586de41324733ac7537b6bd73f39fc176
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47558
Reviewed-by: Caveh Jalali <caveh@chromium.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
 .../google/volteer/variants/volteer2/overridetree.cb        | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/mainboard/google/volteer/variants/volteer2/overridetree.cb b/src/mainboard/google/volteer/variants/volteer2/overridetree.cb
index e4da0e6252..72cb79ac92 100644
--- a/src/mainboard/google/volteer/variants/volteer2/overridetree.cb
+++ b/src/mainboard/google/volteer/variants/volteer2/overridetree.cb
@@ -36,6 +36,12 @@ chip soc/intel/tigerlake
 		},
 		.i2c[2] = {
 			.speed = I2C_SPEED_FAST,
+			.speed_config[0] = {
+				.speed = I2C_SPEED_FAST,
+				.scl_lcnt = 163,
+				.scl_hcnt = 75,
+				.sda_hold = 36,
+			},
 		},
 		.i2c[3] = {
 			.speed = I2C_SPEED_FAST,