From 8754965db1d308a4e66e63fc85e39710f18f7f92 Mon Sep 17 00:00:00 2001
From: Tony Huang <tony-huang@quanta.corp-partner.google.com>
Date: Wed, 31 Aug 2022 17:38:48 +0800
Subject: [PATCH] mb/google/dedede/var/shotzo: Config I2C times for
 touchscreen/audio

Config I2C high / low time in device tree to ensure I2C
CLK runs accurately at I2C_SPEED_FAST (400 kHz).

EE measured touchscreen/audio runs at 385.5/397.9kHz after tuning.

BUG=b:244403643
BRANCH=firmware-dedede-13606.B
TEST=Build and check after tuning I2C clock is under 400kHz

Change-Id: I7d9503e5f92295432e31f09ae791eaa18eac9d4d
Signed-off-by: Tony Huang <tony-huang@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67242
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Zhuohao Lee <zhuohao@google.com>
---
 .../google/dedede/variants/shotzo/overridetree.cb      | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/mainboard/google/dedede/variants/shotzo/overridetree.cb b/src/mainboard/google/dedede/variants/shotzo/overridetree.cb
index 91848e58b0..079bc184a3 100644
--- a/src/mainboard/google/dedede/variants/shotzo/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/shotzo/overridetree.cb
@@ -22,9 +22,19 @@ chip soc/intel/jasperlake
 		},
 		.i2c[2] = {
 			.speed = I2C_SPEED_FAST,
+			.speed_config[0] = {
+				.speed = I2C_SPEED_FAST,
+				.scl_lcnt = 185,
+				.scl_hcnt = 95,
+			}
 		},
 		.i2c[4] = {
 			.speed = I2C_SPEED_FAST,
+			.speed_config[0] = {
+				.speed = I2C_SPEED_FAST,
+				.scl_lcnt = 185,
+				.scl_hcnt = 95,
+			}
 		},
 	}"