From 637470c4387b25f4fc319ea9af362c31c856dac5 Mon Sep 17 00:00:00 2001
From: Eric Lai <ericr_lai@compal.corp-partner.google.com>
Date: Fri, 13 Aug 2021 17:04:45 +0800
Subject: [PATCH] mb/google/brya: Add I2C parameter

Add I2C parameters to make sure each bus speed is around 390kHz.

BUG=b:188793264
TEST=Measure by scope.

Signed-off-by: Eric Lai <ericr_lai@compal.corp-partner.google.com>
Change-Id: Ib47228b8684c44f6acfec9e9e4b6e7b18ba6f6c0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56970
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Varshit B Pandya <varshit.b.pandya@intel.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
---
 .../brya/variants/baseboard/brya/devicetree.cb    | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb b/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb
index 8a779bca05..3281902464 100644
--- a/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb
+++ b/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb
@@ -95,19 +95,34 @@ chip soc/intel/alderlake
 	register "common_soc_config" = "{
 		.i2c[0] = {
 			.speed = I2C_SPEED_FAST,
+			.rise_time_ns = 650,
+                       .fall_time_ns = 400,
+                       .data_hold_time_ns = 50,
 		},
 		.i2c[1] = {
 			.speed = I2C_SPEED_FAST,
+			.rise_time_ns = 650,
+                       .fall_time_ns = 400,
+                       .data_hold_time_ns = 50,
 		},
 		.i2c[2] = {
 			.speed = I2C_SPEED_FAST,
+			.rise_time_ns = 900,
+                       .fall_time_ns = 400,
+                       .data_hold_time_ns = 50,
 		},
 		.i2c[3] = {
 			.early_init = 1,
 			.speed = I2C_SPEED_FAST,
+			.rise_time_ns = 600,
+                       .fall_time_ns = 400,
+                       .data_hold_time_ns = 50,
 		},
 		.i2c[5] = {
 			.speed = I2C_SPEED_FAST,
+			.rise_time_ns = 650,
+                       .fall_time_ns = 400,
+                       .data_hold_time_ns = 50,
 		},
 	}"