From 17c94b65c8dfe99d1f3bbd6eccd917cd8bc50002 Mon Sep 17 00:00:00 2001
From: Hualin Wei <weihualin@huaqin.corp-partner.google.com>
Date: Sat, 8 Feb 2025 09:41:17 +0800
Subject: [PATCH] mb/google/nissa/var/pujjoniru: Tune I2C_5 parameters

1. Modify the I2C frequency of the touchpad to below 400 KHz to
meet the spec.
2. Modify the Thd dat of DATA between 0.3 us and 0.9 us to meet
the spec.

Before:
I2C5 - 407KHz
Thd  - 0.06us

After:
I2C5 - 387Khz
Thd  - 0.34us

BUG=b:391796230,b:391788680
TEST=Check that the wave form meets the spec.

Change-Id: I3c8c8d3b78236247ca7be810ac152085f615a6ef
Signed-off-by: Hualin Wei <weihualin@huaqin.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86324
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Qinghong Zeng <zengqinghong@huaqin.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
---
 .../google/brya/variants/pujjoniru/overridetree.cb          | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/mainboard/google/brya/variants/pujjoniru/overridetree.cb b/src/mainboard/google/brya/variants/pujjoniru/overridetree.cb
index 02ab63358e..11098ac4ed 100644
--- a/src/mainboard/google/brya/variants/pujjoniru/overridetree.cb
+++ b/src/mainboard/google/brya/variants/pujjoniru/overridetree.cb
@@ -82,9 +82,9 @@ chip soc/intel/alderlake
 			.speed = I2C_SPEED_FAST,
 			.speed_config[0] = {
 				.speed = I2C_SPEED_FAST,
-				.scl_lcnt = 152,
-				.scl_hcnt = 79,
-				.sda_hold = 7,
+				.scl_lcnt = 150,
+				.scl_hcnt = 85,
+				.sda_hold = 35,
 			}
 		},
 	}"